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Vaisala DRYCAP DMT345 User Manual Download Page 126

USER'S GUIDE____________________________________________________________________  

126 _________________________________________________________________ M210762EN-D 

 

NOTE 

When Purge in power up is enabled, wait about 5 min after power up 
before taking measurements. The output channels are locked for the first 
operation minutes to the initial measured values. 

 

PURGE 

Use the command 

PURGE

 to start the manual Purge. Issue command 

PURGE

 to start Purge immediately. 

Example: 

>purge 
Purge started, press any key to abort. 
> 

 

The prompt '>' appears when the heating period is over. However, the 
transmitter outputs are locked to values measured before purge until the 
settling time is over. 

Sensor Warming 

DMT345 and DMT346 contain a sensor warming function, that is, when 
humidity reaches a set limit (default: 80%RH), sensor warming operation 
is activated automatically. Sensor warming continues as long as the 
humidity is above that limit. 

When the warming starts, the sensor operation indicator is displayed on 
the optional display and relays configured as "online status" (if any) will 
be released. Warming does not affect T

d/f

,T

d/f atm,

 T

d

,T

d atm, 

x, H

2

O and P

w

 

quantities, all others will be frozen. 

Summary of Contents for DRYCAP DMT345

Page 1: ...USER S GUIDE Vaisala DRYCAP Dewpoint Transmitters DMT345 and DMT346 M210762EN D ...

Page 2: ...echanical including photocopying nor may its contents be communicated to a third party without prior written permission of the copyright holder The contents are subject to change without prior notice Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user All legally binding commitments and agreements are included exclusively in ...

Page 3: ...ks 18 License Agreement 18 Warranty 18 CHAPTER 2 PRODUCT OVERVIEW 19 Introduction to DMT345 and DMT346 19 Basic Features and Options 20 Operating Principle 21 Structure of the Transmitter 22 Probes and Cooling Set 24 CHAPTER 3 INSTALLATION 25 Selecting Location 25 Mounting the Housing 25 Standard Mounting without Mounting Plate 25 Wall Mounting with Wall Mounting Kit 26 Mounting with DIN Rail Inst...

Page 4: ...nstallation and Wiring 51 Selecting Relay Activation State 52 RS 422 485 Interface 53 Installation and Wiring 53 LAN Interface 56 WLAN Interface 57 Attaching the WLAN Antenna 58 Data Logger Module 58 8 Pin Connector 60 CHAPTER 4 OPERATION 63 Getting Started 63 Display Keypad 63 Basic Display 63 Graphic History 64 Menus and Navigation 66 Changing the Language 67 Rounding Setting 67 Display Backligh...

Page 5: ...TIME and FDATE 88 FST 88 General Settings 89 Changing Quantities and Units 89 Using Display Keypad 89 Using Serial Line 90 FORM 90 UNIT 91 Pressure Compensation Setting 92 Using Display Keypad 92 Using Buttons on Motherboard 93 Using Serial Line 93 XPRES and PRES 93 Date and Time 94 Using Display Keypad 94 Using Serial Line 95 User Port Serial Settings 95 SERI 96 SMODE 96 INTV 97 ECHO 97 Data Filt...

Page 6: ...Outputs 116 RSEL 117 Testing Operation of Relays 118 RTEST 118 Operation of the RS 485 Module 119 Networking Commands 119 SERI 119 ECHO 120 SMODE 120 INTV 120 ADDR 121 OPEN nn 121 CLOSE 121 SDELAY 122 Sensor Functions 122 AutoCal 122 Automatic AutoCal 123 Manual AutoCal 123 Sensor Purge 124 Manual Sensor Purge 124 Interval Purge 125 Power Up Purge 125 PUR 125 PURGE 126 Sensor Warming 126 CHAPTER 5...

Page 7: ...ting Temperature 138 Adjusting Temperature Using Display Keypad 138 Adjusting Temperature Using Serial Line 139 CT 139 Adjusting Analog Outputs 140 Adjusting Analog Outputs Using Display Keypad 140 Adjusting Analog Outputs Using Serial Line 141 ACAL 141 CHAPTER 7 TECHNICAL DATA 142 Specifications 142 Performance 142 Technical Specifications of Optional Modules 146 Power Supply Module 146 Analog Ou...

Page 8: ...USER S GUIDE____________________________________________________________________ 8 ___________________________________________________________________ M210762EN D This page intentionally left blank ...

Page 9: ...ling the Probe Through Process Wall 37 Figure 23 Installing Probe Through Thick Walls 37 Figure 24 Cable Bushings 39 Figure 25 Grounding the Screen of Electrical Cable 40 Figure 26 Screw Terminal Block on the Motherboard 41 Figure 27 Connections to 24 VAC Power Supply 44 Figure 28 Power Supply Module 45 Figure 29 Galvanic Output Isolation Module 49 Figure 30 Third Analog Output 50 Figure 31 Third ...

Page 10: ... 62 Relay Availability 116 Figure 63 Following AutoCal on the Display 123 Figure 64 Performing Manual Purge 124 Figure 65 Activating Start up Purge 125 Figure 66 Error Indicator and Error Message 128 Figure 67 Inserting the Sensor in Reference Humidity 1 133 Figure 68 Waiting for Readings to Stabilize 134 Figure 69 Following Stabilization 136 Figure 70 Proceeding with T d f Adjustment 137 Figure 7...

Page 11: ...ings for the Service Port 75 Table 15 IP Settings for the LAN and WLAN Interfaces 76 Table 16 Wireless LAN Settings 79 Table 17 Measurement Commands 85 Table 18 Formatting Commands 85 Table 19 Data Recording Commands 85 Table 20 Purge Commands 86 Table 21 Autocalibration Commands 86 Table 22 Calibration and Adjustment Commands 86 Table 23 Setting and Testing the Analog Outputs 86 Table 24 Setting ...

Page 12: ...USER S GUIDE____________________________________________________________________ 12 __________________________________________________________________ M210762EN D This page intentionally left blank ...

Page 13: ...oduces the features and advantages of the Vaisala DRYCAP Dewpoint Transmitters DMT345 and DMT346 Chapter 3 Installation provides you with information that is intended to help you install this product Chapter 4 Operation contains information that is needed to operate this product Chapter 5 Maintenance provides information that is needed in basic maintenance of the product Possible error states and ...

Page 14: ... M210726EN C May 2008 New options added LAN Interface WLAN Interface Display Alarm feature added M210726EN D June 2009 Added PuTTY terminal application instructions revised description of the MI70 Link software Removed instructions for HyperTerminal Removed Humicap 180L2 sensor option Related Manuals Table 2 Related Manuals Manual Code Manual Name M010091EN E Vaisala DRYCAP Hand Held Dewpoint Mete...

Page 15: ...his point the product could be damaged or important data could be lost NOTE Note highlights important information on using the product Product Related Safety Precautions The DMT345 46 Dewpoint and Temperature Transmitter delivered to you has been tested for safety and approved as shipped from the factory Note the following precautions WARNING Ground the product and verify outdoor installation grou...

Page 16: ...omponent contacts Recycling Recycle all applicable material Dispose of batteries and the unit according to statutory regulations Do not dispose of with regular household refuse Regulatory Compliances Transmitters with LAN or WLAN Interface This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed t...

Page 17: ...ate with a 2 dBi half wave antenna Antennas with a gain greater than 2 dB are strictly prohibited for use with this device The required antenna impedance is 50 ohms To reduce potential radio interference to other users the antenna type and its gain should be so chosen that the equivalent isotropically radiated power e i r p is not more than that permitted for successful communication This Class B ...

Page 18: ... are held by Vaisala or third parties The customer is allowed to use the software only to the extent that is provided by the applicable supply contract or Software License Agreement Warranty For certain products Vaisala normally gives a limited one year warranty Please observe that any such warranty may not be valid in case of damage due to normal wear and tear exceptional operating conditions neg...

Page 19: ... concentration ppm relative humidity RH and temperature T The DMT346 is a high performance instrument for measurement of dewpoint and mixing ratio in temperatures up to 350 C DMT346 also outputs sensor saturation rate SSR and temperature TS TSensor of the cooled Vaisala DRYCAP sensor Because the sensor is cooled these values do not represent true process conditions hence they cannot be used for pr...

Page 20: ...b Difference of T and Td f T DT ºC ºF Table 5 Output Quantities and Their Abbreviations for Vaisala DRYCAP Dewpoint Transmitter DMT346 Quantity Abbreviation Metric Unit Non Metric Unit Dewpoint temperature Td f TDF ºC ºF Mixing ratio x X g kg gr lb Sensor saturation rate SSR Sensor temperature TS ºC ºF Basic Features and Options DMT345 346 has the following basic features and options Dewpoint meas...

Page 21: ...sures water vapor directly and gives thus accurate results of moisture in the process In DMT346 the sensor is cooled down with a cooling set which makes it possible to use a polymer sensor in very high temperatures for example 100 350 C With this technique no complicated sampling systems are needed The cooling set is thermally isolated from the process itself The temperature of the sensor is coole...

Page 22: ...__________________________ M210762EN D Structure of the Transmitter 0604 005 Figure 1 Transmitter Body The numbers refer to Figure 1 above 1 Signal powering cable gland 2 Cable gland for optional module or WLAN antenna connector 3 Cable gland for optional module 4 Cover screw 4 pcs 5 Display with keypad optional 6 Cover LED ...

Page 23: ...re 2 above 1 Service port RS 232 2 Dip switches for analog output settings 3 Power supply and signal wiring screw terminals 4 Relay data logger RS 422 485 LAN or WLAN module optional 5 Grounding connector 6 Power supply module optional 7 Relay data logger or analog output module optional 8 Dewpoint probe 9 Output isolation module optional 10 Adjustment button and Manual AutoCal buttons with indica...

Page 24: ...______________________________________ M210762EN D Probes and Cooling Set 0604 007 Figure 3 Probes Cooling Set Figure 3 above shows from left to right DMT345 probe DMT346 probe and the cooling set The probes are available with the following cable lengths 2 m 5 m and 10 m Optional mounting flange for DMT345 probe ...

Page 25: ...ent probe is important for getting representative process or environmental measurements The location of the probe should provide a good representation of the area of interest Also select a location that is as clean as possible Air should circulate freely around the sensor Mounting the Housing The housing can be mounted either without the mounting plate or with optional mounting plates Standard Mou...

Page 26: ...4829 can be installed directly on wall or onto a standard wall box also US junction box When wiring through back wall remove the plastic plug from the wiring hole in the transmitter before mounting 0604 009 Figure 5 Mounting with Wall Mounting Kit The following numbers refer to Figure 5 above 1 Plastic mounting plate 2 Mount the plate to wall with 4 screws M6 not provided 3 The arched side up 4 Fa...

Page 27: ...e mm inch Metal mounting plate is included in rain shield with installation kit and installation kit for pole or pipeline 0604 011 Figure 7 Mounting with Metal Wall Mounting Plate Numbers refer to Figure 7 above 1 Mount the plate to wall with 4 screws M8 not provided 2 Fasten the transmitter to the mounting plate with 4 fixing screws M6 provided 3 Note the position of the arrow when mounting This ...

Page 28: ...N Rail Installation Kit DIN rail installation kit includes a wall mounting kit 2 clip fasteners and 2 screws M4 10 DIN 7985 Vaisala order code 215094 1 Attach two spring holders to the plastic mounting plate by using the screws provided in the installation kit 2 Fasten the transmitter to the plastic mounting plate with 4 screws provided for that purpose 3 Press the transmitter onto the DIN rail so...

Page 29: ...stallation with Installation Kit for Pole or Pipeline Installation kit for pole or pipeline Vaisala order code 215108 includes the metal mounting plate and 4 mounting nuts for pole mounting When mounting the arrow in the metal mounting plate must point upwards see Figure 7 on page 27 0604 014 Figure 10 Vertical Pole Installation Numbers refer to Figure 10 above 1 U bolts 2 pcs M8 provided for 30 1...

Page 30: ...ain Shield with Installation Kit Vaisala order code for the rain shield 215109 0604 016 Figure 12 Mounting the Rain Shield with Installation Kit Numbers refer to Figure 12 above 1 Fasten the rain shield with installation kit to the metal mounting plate with 2 M6 mounting screws provided 2 Fasten the mounting plate with rain shield with installation kit to the wall or to the pole see pole installat...

Page 31: ...f the installation hole and provide a more finished look Note that the panel mounting frame is not intended to bear the weight of the transmitter and does not include any mounting supports Use the panel mounting frame as follows 1 Use the frame as a template to mark the required size for the installation hole in the panel 2 Cut the hole in the panel 3 Mount the transmitter through the panel with s...

Page 32: ... DMT345 Probe Mounting 0604 018 Figure 15 DMT345 Probe Dimensions mm inch Installation with Flange The DMT345 is a small size d 12 mm general purpose probe suitable for installation through process or duct walls with the flange installation kit available from Vaisala The duct installation kit includes a flange a sealing ring and screws for attaching the flange to the process or duct wall Vaisala o...

Page 33: ...ll 2 Flange 3 Sealing ring 4 Probe NOTE When the temperature difference between the process or duct and the surroundings is large the probe must be installed as deep in the process or duct as possible This prevents errors caused by heat conduction in the probe cable DMT346 Probe and Cooling Set Mounting 22 5 ø1 334 5 ø13 5 357 1 2 0604 020 Figure 17 DMT346 Probe Dimensions in mm The following numb...

Page 34: ...dewpoint is above this range the measurements have to be taken without the cooling fins in order to avoid condensation The flow rate and ambient temperature have an effect on the cooling rate In Figure 19 it is assumed that ambient temperature is 25 C When ambient temperature is raised by 10 C the measurement ranges with and without cooling fins rise approximately 6 C Correspondingly every 10 C ch...

Page 35: ...sure that the temperature at the measurement point is equal to that of the process otherwise the moisture reading may be incorrect 0604 022 Figure 19 Measurement Ranges With and Without the Cooling Fins Parts of the Cooling Set flange flange 15 22 172 A A SECTION A A cooling bush screen tube 104 5 cooling profile M6 60 DIN912 AISI 316 15 ø76 cooling bar ø28 ø118 ø105 0604 023 Figure 20 Parts of th...

Page 36: ...photographs of installating DMT346 transmitter through a process wall The probe should be installed horizontally whenever possible in order to ensure the best possible performance of the cooling set Install the probe according to the following instructions see also Figure 22 on page 37 1 Make a round 89 5 0 5 mm hole on the process wall 2 Weld the tube of the mounting flange tightly on the inner m...

Page 37: ... ø89 5 0 5 DRYCAP sensor O ring FPM protective tube channel with mineral wool 125 max 175 mm PROBE cooling fins locking screws of the probe M4 6 DIN 916 AISI 316 marking hole 8 40 6 0604 024 Figure 22 Installing the Probe Through Process Wall to be welded ø89 5 0 5 lengthening piece inner plate of the process wall wall thickness 160 plate ring plate pipe the flange is fixed with screws or by spot ...

Page 38: ... of condensation that builds up in the installation hole 1 First mount the cooling element and fins to warm it up tightly plug the hole for the probe in the cooling element for the duration of the warmup period 2 After a few hours complete the installation by installing the probe Removing the Transmitter for Maintenance If you remove the transmitter from the process to send it to service etc leavi...

Page 39: ...be 8 11 mm The number of cable bushings depends on the transmitter options See the following recommendations for the cable bushings 0605 026 Figure 24 Cable Bushings Numbers refer to Figure 24 above 1 Cable for signal powering Ø8 11 mm 2 Cable for optional module Ø8 11 mm 3 Cable for optional power module Ø8 11 mm NOTE When there is high electric noise level for example near powerful electric moto...

Page 40: ...e 25 Grounding the Screen of Electrical Cable 1 Cut back outer sheath to desired length 2 Cut back screen braiding or screen foil to dimension X see Figure 25 A above 3 Push the domed cap nut item 1 in Figure 25 and the seal insert with contact socket of the gland items 2 3 onto the cable as shown in the diagram 4 Bend over the screen braiding or screen foil by about 90º item 4 5 Push the seal ins...

Page 41: ...ure 1 on page 22 Note anyhow that the probe is connected to the same potential as the housing Make sure that different groundings are made to the same potential Otherwise harmful ground currents may be generated If it is needed to have galvanic isolation of the power supply line from the output signals DMT346 can be ordered with optional output isolation module This module prevents harmful groundi...

Page 42: ... to terminals Ch1 Ch1 Ch2 Ch2 Connect the RS 232 user port cables to terminals RxD GND and TxD more about the RS 232 connection in Serial Line Communication on page 72 4 When wiring the optional modules see the corresponding section for instructions Installation and Wiring of RS 422 485 Interface on page 53 Installation and Wiring of Alarm Relays on page 51 LAN Interface on page 56 WLAN Interface ...

Page 43: ... continuously during normal operation 7 Close the cover and replace the cover screws The transmitter is ready for use Connections to a 24 VAC Power Supply Separate floating supply for each transmitter is recommended see the upper part of Figure 27 on page 44 If you have to connect several transmitters or other instruments to one AC supply the phase must always be connected to the connector of each...

Page 44: ...GUIDE____________________________________________________________________ 44 __________________________________________________________________ M210762EN D 0703 041 Figure 27 Connections to 24 VAC Power Supply ...

Page 45: ...connect device shall be incorporated in the fixed wiring 0605 030 Figure 28 Power Supply Module Numbers refer to Figure 28 above 1 Connect AC mains voltage wires to these terminals 2 Grounding terminal 3 In case the module is not installed in the factory Connect wires from these terminals to the POWER 10 35V 24V terminals of the motherboard 4 5 Installation 1 Disconnect the power 2 Remove the prot...

Page 46: ...pply module from the transmitter when the power is on WARNING Do not connect the mains power to power supply module when it is not installed in the transmitter WARNING Always connect protective ground terminal Warnings Dieses Produkt entspricht der Niederspannungsrichtlinie 2006 95 EWG Das Netzmodul darf nur von einem dazu befugten Elektriker angeschlossen werden Trennen Sie das Netzmodul nicht vo...

Page 47: ...trica puó essere collegata al modulo di alimentazione elettrica soltanto da un elettricista autorizzato Non staccare l alimentazione elettrica dal trasmettitore quando é acceso Non collegare la corrente elettrica al modulo di alimentazione elettrica se non é installato nel trasmettitore DMT345 346 Collegare sempre il morsetto protettivo a terra Dette produkt er i overensstemmelse med direktivet om...

Page 48: ...k feljogosított elektrotechnikus csatlakoztathatja a tápegységmodulra A bekapcsolt távadóról ne csatolja le a tápegységmodult Ne csatlakoztassa a hálózati feszültséget a tápegységmodulhoz ha az nincs beépítve a DMT345 346 távadóba Feltétlenül csatlakoztasson földelő védőkapcsot Šis produktas atitinka direktyvą dėl žemos įtampos prietaisų 2006 95 EB Elektros tinklą su energijos tiekimo moduliu suju...

Page 49: ... síťového napájení k napájecímu modulu smí provádět pouze oprávněný elektrikář Neodpojujte napájecí modul od snímače při zapnutém napájení Nepřipojujte síťové napájení k napájecímu modulu pokud není instalován ve snímači DMT345 346 Vždy zapojte ochrannou zemnící svorku Galvanic Isolation for Output If galvanic isolation of the power supply line from the output signals is needed DMT346 can be order...

Page 50: ...n the factory continue with the step 4 2 Open the transmitter cover and and fasten the analog output module to the position for MODULE 2 with four screws Refer to Figure 2 on page 23 3 Connect the flat cable between the analog output module and the motherboard s connector for MODULE 2 4 Take out the protective plug from the cable gland and thread the wires 5 Connect the wires to the screw terminal...

Page 51: ... contact ratings in section Technical Specifications of Optional Modules on page 146 Installation and Wiring 1 Disconnect the power In case the relay module is installed in the factory continue with the step 5 2 To attach the module open the transmitter cover and fasten the relay module to the bottom of the housing with four screws See the position in Figure 2 on page 23 3 When the mains power is ...

Page 52: ... the power and close the cover For instructions on how to operate the relay for example select quantity for the relay output and set the relay setpoints see section Operation of Relays on page 112 0605 032 Figure 32 Relay Module Numbers refer to Figure 32 above 1 Indication led for the relay 1 or 3 2 Relay test buttons 3 Flat cable pins 4 Indication led for relay 2 or 4 WARNING The relay module ma...

Page 53: ...A is posive against B when measured with a voltmeter When connecting the module be prepared to swap the A and B wires if you have a communication problem Installation and Wiring 1 Disconnect the power In case the RS 485 module is installed in the factory continue with the item 4 2 To attach the module open the transmitter cover and fasten the RS 485 module to the bottom of the housing with four sc...

Page 54: ...t the master s end of the line is also terminated by using master s internal termination or with a separate terminator If you are connecting many transmitters to the same RS 485 bus make sure that switches 1 and 2 are OFF and terminate the bus with separate terminators at both ends This allows removing any transmitter without blocking the bus operation NOTE If you use the internal termination of t...

Page 55: ...___________________ Installation VAISALA _______________________________________________________________________ 55 0605 034 Figure 34 4 Wire RS 485 Bus Connections Part A Table 7 4 Wire Switch 3 On RS 485 master Data DMT346 TxA RxA TxB RxB RxA TxA RxB TxB ...

Page 56: ... power and close the cover LAN Interface The optional LAN interface enables an Ethernet connection to the transmitter The user can establish a virtual terminal session using a telnet client program such as PuTTY When the LAN Interface is in use serial communication using the User Port is disabled The LAN interface module must be installed at the factory when ordering the transmitter or by a Vaisal...

Page 57: ... you can access by entering the IP address of the LAN interface in the address field of a web browser For instructions on how to verify the current settings and status of the LAN interface see section Device Information on page 98 0709 003 Figure 36 LAN Interface Module The following numbers refer to Figure 36 above 1 Flat cable connector 2 RJ45 connector with indicator LEDs for link and activity ...

Page 58: ... module must be installed at the factory when ordering the transmitter or by a Vaisala Service Center Before taking the transmitter into use the user must attach the antenna of the WLAN interface into the RP SMA connector on the transmitter cover The location of the antenna is shown in Figure 75 on page 150 Data Logger Module The optional data logger module extends the data storage for the measure...

Page 59: ...ntities that are no longer selected Changing the quantities does not delete any measurement data that is already in memory The data logger module has a real time clock with a battery back up The clock has been set to the Coordinated Universal Time UTC at the factory and its time cannot be set by the user The data that is stored in the logger s memory is timestamped using the logger s clock When da...

Page 60: ... the module The transmitter will also indicate the problem by activating the Add on module connection failure error If the module is not operating correctly the transmitter must be sent to Vaisala for maintenance The data logger module must be installed at the factory when ordering the transmitter or by a Vaisala Service Center Once installed the module is automatically used by the transmitter Whe...

Page 61: ...________________ Installation VAISALA _______________________________________________________________________ 61 PIN Terminal Wire Serial Signal Analog Signal 6 Pink Supply Supply Supply 7 Blue Data in RX B 8 Shield Red Cable shield Cable shield Cable shield ...

Page 62: ...USER S GUIDE____________________________________________________________________ 62 __________________________________________________________________ M210762EN D This page intentionally left blank ...

Page 63: ...eved only when the ambient pressure is taken into consideration See section Pressure Compensation Setting on page 92 for instructions on how to set the pressure Start up time for DMT345 346 transmitter is in total about 6 minutes The outputs serial and analog are activated 3 seconds after powering up the transmitter In addition 10 seconds after the measurement the outputs will freeze for about 6 m...

Page 64: ...ion views see section Device Information on page 98 NOTE From any view a four second press on the right hand function button takes you directly to the basic display Graphic History The graphical display shows the data trend or min max graph of the selected quantities one at a time The graph is updated automatically while measuring 0706 028 Figure 41 Graphical Display Trend graph Shows you a curve ...

Page 65: ...nd out in the graph window Press the arrow buttons move the cursor vertical bar along the time axis The cursor mode allows you to observe individual measuring points The numerical value at the cursor position is shown at the left upper corner The right upper corner shows the time from the present to the chosen moment without the logger module or the date and time at the cursor position when the lo...

Page 66: ...ent mode is not displayed Autocal AutoCal performed only shown in 3 h graphs A question mark after time tells you that at least one power failure dashed vertical line has occurred after the chosen moment In this case the actual time difference between the present and the cursor position is not exactly known Menus and Navigation You can change settings and select functions in the menus 1 Open the M...

Page 67: ...2 Open the MAIN MENU by pressing any of the buttons 3 Scroll to the System menu option and press the button The menu option is indicated with the wrench symbol 4 Scroll to the Language menu option and the left hand button The menu option is indicated with the flag symbol 5 Select the language with the buttons and confirm the selection by pressing the left hand button 6 Press the right hand button ...

Page 68: ...he SELECT button 5 Press EXIT to return to the basic display Display Contrast Setting 1 Open the MAIN MENU by pressing any of the arrow buttons 2 Select Display press the arrow button 3 Select Contrast press the ADJUST button 4 Adjust the contrast by pressing the arrow buttons 5 Press OK and EXIT to return to the basic display Keypad Lock Keyguard This function locks the keypad and prevents uninte...

Page 69: ...OTE You can also disable the keypad completely with serial command LOCK Factory Settings Use the display keypad to restore the factory settings This operation does not affect the adjustments Only settings available in the menus are restored 1 Open the MAIN MENU by pressing any of the arrow buttons 2 Select System by pressing the arrow button 3 Select Factory settings and press the REVERT button to...

Page 70: ...that was triggered first will be shown on the display The next active alarm is revealed when the currently shown alarm is acknowledged by pressing the OK button Note that activated alarms are only shown on the screen There are no alarm messages output to the serial line or markers placed in the graph data After an alarm has been acknowledged you must refer to the data graphs to see when the measur...

Page 71: ...e or Cancel to undo the modification 6 Set a suitable Hysteresis value to prevent the alarm from being triggered unnecessarily by small measurement changes that pass the alarm limit repeatedly 7 Set or clear the Alarm enable checkbox to enable or disable the alarm 8 Press the Exit button to leave the alarm configuration screen and return to the basic view MI70 Link Program for Data Handling The re...

Page 72: ... Accessories on page 148 Serial Line Communication Connect the serial interface by using either the user port or the service port For permanent interfacing to host system use the user port You can change the serial settings and operate in RUN STOP and POLL modes For temporary connections use the service port Service port is always available with fixed serial settings 0605 039 Figure 47 Service Por...

Page 73: ...nections to pins 4 6 7 and 8 are required only if your software requires hardware handshaking NOTE User port cannot be used when the RS 485 module is connected Service Port Connection Connection Cables To connect to the service port you need a suitable cable with an RJ45 connector Depending on the connections of your PC you can either use the Serial Connection Cable optional accessory 19446ZZ or t...

Page 74: ...driver automatically 5 The installation has reserved a COM port for the cable Verify the port number and the status of the cable using the Vaisala USB Instrument Finder program that has been installed in the Windows Start menu Windows will recognize each individual cable as a different device and reserve a new COM port Remember to use the correct port in the settings of your terminal program If yo...

Page 75: ...ly connected to the network and the networking settings must be suitable for your network For a description of interfaces see sections LAN Interface on page 56 and WLAN Interface on page 57 The LAN and WLAN interfaces both operate by accessing the serial interface User Port of the transmitter All commands that are available using the serial interface are available through the LAN and WLAN interfac...

Page 76: ... a part of Must be set manually if automatic configuration is not used A common netmask is 255 255 255 0 Gateway IP address of the server that enables the transmitter to access other networks Must be set manually if automatic configuration is not used Example value 192 168 0 1 MAC The MAC address is the unique hardware address of the LAN or WLAN interface Cannot be changed Using Display Keypad You...

Page 77: ...lection by pressing OK 6 After configuring the desired parameters press EXIT to return to the basic display Using Serial Line Use the serial line command NET to view or set the network settings for the LAN and WLAN interfaces You can also refresh the network information or disconnect all active connections NET REFRESH DISCONNECT DHCP WEB DHCP IP SUBNET GATEWAY WEB where REFRESH Updates the network...

Page 78: ... MAC address 00 40 9d 2c d2 05 Telnet Not connected net on off DHCP ON IP address 192 168 0 104 Subnet mask 255 255 255 0 Default gateway 192 168 0 1 Web config OFF MAC address 00 40 9d 2c d2 05 Telnet Connected OK net off 192 168 0 101 255 255 255 0 192 168 0 1 off DHCP OFF IP address 192 168 0 101 Subnet mask 255 255 255 0 Default gateway 192 168 0 1 Web config OFF MAC address 00 40 9d 2c d2 05 ...

Page 79: ... passphrase that is used with an encrypted network Using Display Keypad You can configure the Wireless LAN settings using the display keypad as follows 1 Press any of the arrow buttons to open the MAIN MENU 2 Press the arrow button to select Interfaces 3 Press the arrow button to select Network settings There will be a delay as the transmitter refreshes the network information 4 Press the arrow bu...

Page 80: ...enter the encryption key in hexadecimal 10 hexdecimals for 64 bit encryption or 26 hexadecimals for 128 bit encryption A WPA key must be 8 63 ASCII characters 8 After setting the wireless network parameters press the Exit button in the Wireless Network Settings menu You will be asked to confirm the new settings Note that when new settings are saved all currently active WLAN connections are disconn...

Page 81: ...telnet connection is established via the LAN or WLAN interface the session has the same communication mode run interval poll address and echo settings as the serial port user port session would have These settings can be changed using the display keypad using the serial line user port or service port or on the fly during the telnet session The display menu path to the telnet settings is Main menu ...

Page 82: ...dditional options for advanced users For example there are more options for securing the wireless network If these additional options are used they will appear as custom configurations when viewed from the serial line or the display keypad 0802 114 Figure 54 Web Configuration Interface for WLAN Terminal Program Settings The instructions below describe how to connect to the transmitter using the Pu...

Page 83: ... cable you can check the port that it uses by clicking the USB Finder button This opens the Vaisala USB Instrument Finder program that has been installed along with the USB drivers 3 Check that the other serial USB line settings are correct for your connection and change if necessary The default settings shown in Figure 1 are used by the Service Port of the transmitter 0810 070 Figure 55 Opening a...

Page 84: ... network address using DHCP wait for a minute for this to complete then verify the address from the transmitter 2 In the Session window select the Telnet connection type 3 Enter the IP address of your transmitter in the Host Name or IP address field If you do not know the port the default port 23 is likely correct 0810 071 Figure 56 Opening a Telnet Connection 4 Click the Open button to open the c...

Page 85: ... LAN and WLAN interfaces WLAN View or set wireless network parameters for WLAN interface OPEN 0 99 Open Temporarily Connection to a POLL Mode Device CLOSE Close the Temporary Connection Back to POLL Mode Table 18 Formatting Commands Command Description FORM Set the output format of SEND and R commands FST Add the state of AutoCal purge and sensor warming in connection with SEND and R commands FDAT...

Page 86: ...utputs AMODE Display analog output mode AERR Change the error output ASCL Analog output scaling Table 24 Setting and Testing the Relays Command Description RSEL Configure relay settings RTEST Test relays Table 25 Other Commands Command Description Output the information about the device Output the information about the device in POLL state CDATE Display the output date set date when adjustment ena...

Page 87: ... 20 6 C H2O 958 ppmV x 0 6 g kg r Tdf 20 7 C H2O 958 ppmV T 23 8 C RH 3 3 RH If a value is too long to fit to the allocated space in the output or if there is an error in outputting the quantity the value is displayed with stars You can change the format of the output with the following commands Outputting interval can be changed with the INTV command Output message format can be changed with the ...

Page 88: ...nable disable output of time and date to the serial line To add time to R and SEND outputs issue command FTIME x Syntax FTIME Syntax to add date to R and SEND outputs FDATE x where x ON or OFF Example send RH 16 2 RH T 22 0 C ftime on Form time ON send 00 03 56 RH 16 2 RH T 22 0 C fdate on Form date ON send 2000 01 01 00 04 08 RH 16 2 RH T 22 0 C FST To output the state of purge sensor warming and...

Page 89: ... heat power General Settings Changing Quantities and Units To change quantities and units use serial commands or the optional display keypad See Table 5 on page 20 for available quantities NOTE Only the quantities selected when ordering the device can be selected as an output quantity Using Display Keypad Use display keypad to select the display output quantities 1 Open the MAIN MENU by pressing a...

Page 90: ...al output units Using Serial Line Use the serial line command FORM to change the format and the command UNIT to select metric or non metric output units FORM Use the serial line command FORM to change the format or select a certain quantities for the output commands SEND and R Syntax FORM x where x Formatter string Formatter string consists of quantities and modifiers If no formatter string is ent...

Page 91: ... sensor heating active temperature 95 ºC SN Transmitter serial number TIME Time hh mm ss DATE Date yyyy mm dd OK Pressure stability indicator two characters OK or CS2 Modulus 256 checksum of message sent so far ascii encoded hexadecimal notation CS4 Modulus 65536 checksum of message sent so far ascii encoded hexadecimal notation CSX NMEA xor checksum of message sent so far ascii encoded hexadecima...

Page 92: ...d that you make the pressure compensation setting Note that conversions from mmHg and inHg are defined at 0 C and for mmH2O and inH2O at 4 C NOTE Pressure compensation is intended to be used in normal air only When measuring in other gases please contact Vaisala for further information NOTE Fixed pressure compensation value of 1013 25 hPa is used when in adjustment mode Using Display Keypad Use di...

Page 93: ...k button Press check button Pchk and a red led will flash the current pressure setting in bara Press the set button Pset to set the pressure value The number of presses equals the number of bara to be set for example three presses three bara After a few seconds the red led will confirm the setting by flashing the new pressure value Using Serial Line XPRES and PRES Command XPRES should be used if t...

Page 94: ...Pa Date and Time Using Display Keypad If the optional Data Logger Module is installed you can change the time and date using the display keypad 1 Press any of the arrow buttons to open the MAIN MENU 2 Select System and press the arrow button to confirm your selection 3 Select Date and time and press the arrow button 4 Press the SET button to enter the adjustment mode and use the arrow buttons to s...

Page 95: ... user port can be changed via the serial line or by using the optional display keypad The communication settings for the service port are fixed and not changeable 1 Open the MAIN MENU by pressing any of the arrow buttons 2 Select Interfaces and press the arrow button to confirm your selection 3 Select Serial interface and press the arrow button to confirm your selection 4 Select Bit rate Serial fo...

Page 96: ...ress EXIT to return to the basic display SERI Use the serial line command SERI b p d s to set communication settings for the user port Syntax SERI b p d s where b Bauds 110 150 300 600 1200 2400 4800 9600 19200 38400 57600 115200 p Parity n none e even o odd d Data bits 7 or 8 s Stop bits 1 or 2 Example SERI 600 N 8 1 600 N 8 1 SMODE Use the command SMODE xxxx to set the user port start up operati...

Page 97: ...e at power up Selected output mode will be activated after power outages INTV Use the command INTV xxx yyy to set the outputting interval for the RUN mode Syntax INTV xxx yyy where xxx Output interval 0 255 0 the fastest possible output rate yyy Unit s min or h Example INTV 10 min Output intrv 10 min ECHO Use the command ECHO x to set the user port echo The command either enables or disables echo ...

Page 98: ...lay keypad to set the filtering level 1 Open the MAIN MENU by pressing any of the arrow buttons 2 Select Measuring by pressing the arrow button 3 Select Filtering and press CHANGE to confirm your selection 4 Select Off Standard Extended and press SELECT to confirm your selection 5 Press EXIT to return to the basic display FILT Set the filtering level Syntax FILT xxx where xxx OFF ON or EXT default...

Page 99: ...N interfaces analog output information relay output information 0706 012 Figure 58 Following Device Information on the Display Proceed in the information views by pressing the MORE button as many times as you get the desired information You can browse through the information displays also with arrow buttons Press OK to return to the basic display Use the serial line command to check the current tr...

Page 100: ... 1000 00 hPa Filter ON Ch1 output 4 20mA Ch2 output 4 20mA Ch1 Tdf low 0 00 C Ch1 Tdf high 100 00 C Ch2 x low 0 00 g kg Ch2 x high 1000 00 g kg Module 1 not installed Module 2 not installed HELP Use the command HELP to list the commands help ACAL ADDR AERR ALSEL ASCL ASEL CDATE CLOSE CODE CRH CT CTA CTEXT DATE DELETE DIR DSEL DSEND ECHO ERRS FCRH FDATE FILT FORM FST FTIME HELP INTV ITEST MODS NET ...

Page 101: ...mode selected with command SMODE Locking Menu Keypad by Using Serial Line LOCK Use the LOCK command to prevent the user from entering the menu using the keypad or to lock the keypad completely You can optionally set a 4 digit PIN code for example 4444 If a PIN code has been set the user will be prompted to enter the code when trying to access the menu Entering the code correctly will disable the l...

Page 102: ... graphical view of the display or it can be listed out by using the serial line or MI70 Link program Selecting Data Recording Quantities If the device is provided with the optional display the recorded quantities are always those selected for the display Up to three quantities can be recorded at a time See section Changing Quantities and Units on page 89 for instructions on how to select the displ...

Page 103: ...a of the selected quantities one at a time See section Graphic History on page 64 for details about graphical display DIR Use the serial line and issue the DIR command to check the available files Without the data logger module the transmitter records five files five observation periods for each selected quantity The data logger raises the number of recorded files to six for each quantity Thus the...

Page 104: ...vals 2008 04 11 20 41 11 135 2 T 12 min intervals 2008 04 10 21 03 41 135 3 T 2 h intervals 2008 03 31 18 03 41 135 4 T 12 h intervals 2008 02 04 12 03 41 135 5 T 3 d intervals 2007 03 04 00 03 41 135 6 Tdf 90 s intervals 2008 04 11 20 41 11 135 7 Tdf 12 min intervals 2008 04 10 21 03 41 135 8 Tdf 2 h intervals 2008 03 31 18 03 41 135 9 Tdf 12 h intervals 2008 02 04 12 03 41 135 10 Tdf 3 d interva...

Page 105: ... 45 2007 05 05 00 36 00 22 43 22 45 22 41 2007 05 05 00 48 00 22 35 22 41 22 32 2007 05 05 01 00 00 22 31 22 33 22 29 NOTE Output of large amounts of recorded data can result in huge data files and take a long time up to several days for the entire memory of the data logger To make it easier to process the data it is recommended to select the largest suitable data interval and to specify the start...

Page 106: ...milarly to the DELETE command the UNDELETE command is used without any arguments It will recover all deleted data that has not been overwritten yet Analog Output Settings The analog outputs are set in the factory according to the order form In case you want to change the settings follow these instructions Changing Output Mode and Range Both output channels have their own dip switch module with 8 s...

Page 107: ...59 Current Voltage Switches of Output Modules Numbers refer to Figure 59 above 1 Current voltage selection output switches from 1 to 2 2 Current voltage range selection switches from 3 to 7 in analog output 1 and 2 3 Switches for service use only Keep in OFF position always NOTE Only one of the switches 1 or 2 must be ON at a time Only one of the switches 3 to 7 must be ON at a time ...

Page 108: ...ill valid after changing the output mode range see section Analog Output Fault Indication Setting on page 111 Analog Output Quantities NOTE The relative humidity and temperature readings are not those of the process itself but the ones measured after the cooling process Therefore they should not be selected as output quantities They are meant to be used in calibration or during installation Use th...

Page 109: ...MODE ASEL Use the serial line to select and scale the analog output quantities Connect the transmitter to the PC Open the terminal connection between your PC and the transmitter 1 Check the analog outputs with the AMODE command Example amode Ch1 output 0 1V Ch2 output 0 1V 2 Select and scale the quantities for the analog outputs with the command ASEL xxx yyy zzz Note that the optional quantities c...

Page 110: ...elect one of the testing options Force 0 50 100 of scale Press TEST to confirm your selection All outputs are tested simultaneously The actual output value depends on the selected range 6 Press OK to stop testing Press EXIT to return to the basic display ITEST Use the serial line to test the operation of the analog outputs Use the command ITEST aa aaa bb bbb to force the analog outputs to entered ...

Page 111: ...e arrow button 3 Select Analog Outputs by pressing the arrow button 4 Select Output 1 2 3 by pressing the arrow button 5 Select Fault indication Press SET to confirm your selection Enter the fault indication value by using the arrow buttons Press OK to confirm your setting This value is outputted if a transmitter error occurs 6 Press EXIT to return to the basic display AERR Use the serial line AER...

Page 112: ...able can be chosen Measurement Based Relay Output Modes Relay Setpoints When the measured value is in between the above and below values the relay is passive When choosing lower value as above value and higher value as below value the relay is passive when the measured value is not between the setpoints You can also set only one setpoint See Figure 60 below for illustrative examples of the differe...

Page 113: ...asured value passes the exact value of the setpoint When returning and passing the setpoint again relay is not released before the value reaches the setpoint increased decreased by the hysteresis value Hysteresis should be smaller than difference of the setpoints Example When the active above value is 50 ºC and the hysteresis value is 2 ºC relay activates when the relative humidity reaches 50 ºC A...

Page 114: ... relay changes state on the basis of the operation status as follows FAULT STATUS Normal operation relay active C and NO outputs are closed Not measuring state error state or power off relay released C and NC outputs are closed ONLINE STATUS Live measurement data available relay active C and NO outputs are closed No live data for example error state chemical purge or adjustment mode relay released...

Page 115: ...TATUS relays are usually used in conjunction with an analog output to obtain validity information for the output value NOTE If transmitter loses its power all status based relays are released similarly to the case of an instrument failure Enabling Disabling Relays You can deactivate the relay outputs for example for service purposes of your system Indication Led Operation Relay is activated LED is...

Page 116: ... the display keypad to set the relay outputs 1 Open the MAIN MENU by pressing any of the arrow buttons 2 Select Interfaces confirm by pressing the arrow button 3 Select Relay outputs confirm by pressing the arrow button 4 Select Relay 1 2 3 4 confirm by pressing the arrow button 5 Select the Quantity confirm by pressing Change Select the Quantity by using the arrow buttons Confirm your selection b...

Page 117: ...breviations presented above See Table 5 on page 20 Example of window limit switch Selecting relay 1 to follow dewpoint measurement and relay 2 to follow sensor temperature measurement Two relay setpoints are set for both relays rsel tdf ts Rel1 Tdf above 70 00 C 50 Rel1 Tdf below 30 Rel1 Tdf hyst 2 00 C 2 Rel1 Tdf enabl ON on Rel2 Ts above 140 00 C 140 Rel2 Ts below 80 Rel2 Ts hyst 2 00 C 2 Rel2 T...

Page 118: ...he module push buttons to activate the relays Press the REL 1 or REL 2 button to activate the corresponding relay Use the display keydpad to test the operation of relays 1 Open the MAIN MENU by pressing any of the arrow buttons 2 Select System press the arrow button 3 Select Diagnostics press the arrow button 4 Select Relay tests press the arrow button 5 Select Invert relay 1 press TEST Now the se...

Page 119: ...ays disabled OFF when using the 2 wire connection When using the 4 wire connection you can disable enable the echo setting NOTE User port on DMT346 main board cannot be used and connected when RS 485 module is connected Service port is operating normally Networking Commands Set the RS 422 485 interface by using the following commands The other serial line commands are presented in section List of ...

Page 120: ...TOP RUN POLL or SEND In STOP mode measurements output only by command all commands can be used In RUN mode outputting automatically only command S can be used to stop see command INTV below In POLL mode measurements output only with command SEND See command ADDR on page 121 In SEND mode no commands are needed a message is automatically outputted after power up When several transmitters are connect...

Page 121: ...bles the fastest possible output rate ADDR Addresses are required only for POLL mode see serial line command SMODE on page 96 Use the ADDR aa command to input the RS 485 transmitter address where aa address 0 99 default 0 Example The transmitter is issued the address 99 addr Address 2 99 OPEN nn When all transmitters on the RS 485 bus are in POLL mode the OPEN nn command sets one transmitter tempo...

Page 122: ... 254 Example sdelay Serial delay 0 10 sdelay Serial delay 10 Sensor Functions AutoCal To obtain the best possible accuracy in measurements taken in dry environments DMT345 and DMT346 have a built in AutoCal feature During the AutoCal the transmitter adjusts the dry end reading to correspond to the calibrated values This is a unique and patented method to avoid errors in accuracy when monitoring lo...

Page 123: ...oCal has taken place for obtaining the most accurate measurement in a very dry environment you can perform Autocal manually before measuring as follows 1 Open the MAIN MENU by pressing any of the arrow buttons 2 Select Measuring press the arrow button 3 Select Manual AutoCal press the arrow button 4 Press START to start AutoCal If the AutoCal conditions are not fulfilled a note appears on the disp...

Page 124: ...are turned on automatically in DMT345 and DMT346 It is recommended not to turn them off The automatic sensor Purge can also be started manually If enabled power up Purge will start always about 10 seconds after reset If the power is continuously turned on in the transmitter the automatic sensor Purge will be performed at an interval of 24 hours Manual Sensor Purge The Purge should be performed alw...

Page 125: ...icals Power Up Purge Purge is to start within 10 seconds from the power up of the device This function can be disabled by using the serial line or the display keypad 0706 016 Figure 65 Activating Start up Purge 1 Press ON to activate Start up Purge Pressing OFF disables the function 2 Press EXIT to return to the basic display PUR With the PUR command you can enable or disable interval and power up...

Page 126: ...ted press any key to abort The prompt appears when the heating period is over However the transmitter outputs are locked to values measured before purge until the settling time is over Sensor Warming DMT345 and DMT346 contain a sensor warming function that is when humidity reaches a set limit default 80 RH sensor warming operation is activated automatically Sensor warming continues as long as the ...

Page 127: ...g Clean the transmitter enclosure with a soft lint free cloth moistened with mild detergent Changing the Cooling Set Filter 1 Turn the filter counter clockwise to remove it 2 Install a new filter on the cooling set and tighten it New filters can be ordered from Vaisala see Available Options and Accessories Table 41 on page 148 Error States In error state the quantity is not measured and the output...

Page 128: ...dity probe and the probe cable 4 Temperature sensor short circuit Check the integrity of the humidity probe and the probe cable Clean the probe from dirt water ice or other contaminants 5 Temperature measurement malfunction Check the integrity of the humidity probe and the probe cable Clean the probe from dirt water ice or other contaminants 6 Temperature sensor current leak Check the integrity of...

Page 129: ...le slot Disconnect the power and change the communication module to another module slot 28 29 Unknown incompatible module installed in add on module slot 1 or2 Ensure that the module is compatible with the DMT345 346 30 Internal analog voltage out of range Internal transmitter failure Remove the transmitter and return the faulty unit to Vaisala Service 31 Internal system voltage out of range Inter...

Page 130: ...formation on the problem 3 Pack the faulty product in a strong box of adequate size with proper cushioning material to avoid damage 4 Include the information specified in step 2 in the box with the faulty product Also include a detailed return address 5 Ship the box to the address specified by your Vaisala contact Vaisala Service Centers Vaisala Service Centers perform calibrations and adjustments...

Page 131: ...ce should be sent to a Vaisala Service Center for calibration and adjustment See contact information in section Vaisala Service Centers on page 129 NOTE If the process is not shut down for removing the transmitter for calibration the hole for the probe in the cooling set must be plugged otherwise there is a risk of water condensing inside the cooling pipe in overpressurized processes User Calibrat...

Page 132: ...able the adjustment mode NOTE Fixed pressure compensation of 1013 25 hPa is used when in adjustment mode Adjustments should be performed at ambient pressures Adjustment Information These data are shown on the device information see section Device Information on page 98 Use the display keypad to feed the adjustment information 1 If you are not in the adjustment menu press the ADJ button on the moth...

Page 133: ...r to disable the adjustment function Two Point Relative Humidity Adjustment Using Display Keypad NOTE Reference humidities must be 0 RH and 30 75 RH A suitable product for the two point RH calibration is for example the Vaisala Humidity Calibrator HMK15 1 Press the ADJ button see Figure 2 on page 23 to open the ADJUSTMENT MENU 2 Select Adjust Td measurement press button 3 Select 2 point RH adjustm...

Page 134: ...o return to the adjustment menu 8 Before closing the adjustment mode feed the adjustment information into the device see section Adjustment Information on page 132 Press EXIT to close the adjustment mode and return to the basic display Using Serial Line NOTE Reference humidities must be 0 RH and 30 75 RH A suitable product for the two point RH calibration is for example the Vaisala Humidity Calibr...

Page 135: ... the probe stabilize for about 30 minutes You can follow the stabilization by pressing Enter 11 When stabilized type the high end reference value after the question mark and press Enter fcrh RH 11 25 Ref1 c RH 11 24 Ref1 c RH 11 24 Ref1 11 3 Press any key when ready RH 75 45 Ref2 c RH 75 57 Ref2 c RH 75 55 Ref2 c RH 75 59 Ref2 75 5 OK 12 The OK indicates that the adjustment has succeeded and the n...

Page 136: ...orm the RH adjustment For DMT345 346 the reference dewpoint must be below 25 C 13 F and temperature must be below 40 C 104 F NOTE This adjustment is valid only if the measurement or process is in the lower end of the measurement range in very dry See Specifications on page 142 When adjusting the dewpoint refer to the following instructions 1 Press the ADJ button on the motherboard to open the ADJU...

Page 137: ...tter performs Td f adjustment This may take up to six 6 minutes 0706 045 Figure 71 Completing T d f Adjustment 7 The adjustment is now completed NOTE Several AutoCals can be necessary after this adjustment has been performed until the transmitter reaches full accuracy One point Dewpoint Adjustment Using Serial Line 1 Let the sensor stabilize for at least one 1 hour 2 Press the ADJ button on the mo...

Page 138: ...e actual process temperature Adjusting Temperature Using Display Keypad Use preferably the display keypad to adjust the temperature 1 Press the ADJ button on the motherboard to open the ADJUSTMENT MENU 2 Press the arrow button to select Adjust T measurement 3 Select by pressing 1 point or 2 point adjustment Press START to start adjusting 4 Remove the filter from the probe and insert the probe into...

Page 139: ...4 Let the reading stabilize enter the reference temperature after the question mark and press Enter three times When having another reference temperature two point adjustment press Enter twice and insert the probe to the second reference When the reading is stabilized enter the second reference temperature after the question mark and press Enter Please note that the difference between the two temp...

Page 140: ...d output type Use the display keypad or the serial line to do this Adjusting Analog Outputs Using Display Keypad 1 Press the ADJ button on the motherboard to open the ADJUSTMENT MENU 2 Press the arrow button to select Adjust analog outputs 3 Select the output to be adjusted Adjust analog output 1 2 press START 4 Measure the first analog output value with a multimeter Enter the measured value by us...

Page 141: ...41 Adjusting Analog Outputs Using Serial Line ACAL Use the serial line to perform the analog output adjustment Use the ACAL command and enter the multimeter reading Example current outputs ACAL Ch1 I1 mA 2 046 Ch1 I2 mA 18 087 Ch2 I1 mA 2 036 Ch2 I2 mA 18 071 Press the adjustment button on the motherboard inside the transmitter again to disable the adjustment function ...

Page 142: ... provides the technical data of the product Specifications Performance Table 32 Dewpoint Specifications DMT345 Property Description Value Sensor Vaisala DRYCAP 180S Measurement range 40 100 C 40 212 F Td Accuracy 2 C 3 6 F Td See accuracy graph in Figure 72 on page 143 Response time 63 90 flow rate 1l min and 1 bar pressure from dry to wet 5s 10 s from wet to dry including auto calibration 45s 5 m...

Page 143: ...h sensor warming upper range limited by humidity at 80 RH warming is switched on and T reading not actual process temperature Accuracy 0 4 C at 100 C Temperature sensor Pt 100 IEC 751 1 3 class B Table 34 Relative Humidity Specifications DMT345 Property Description Value Measurement range 0 100 RH with sensor warming 0 80 RH Accuracy below 10 RH 10 of reading above 10 RH 1 5 RH 1 5 of reading Tabl...

Page 144: ...s from wet to dry including auto calibration 45s 5 min 0604 022 Figure 73 Dewpoint Measurement Accuracy Graph DMT346 Table 37 Mixing Ratio Specifications DMT346 Property Description Value Measurement range typical 0 1000 g kg 0 7000 gr lbs Accuracy 12 of reading Table 38 Operating Environment Specifications Both Models Property Description Value Mechanical durability Probes Up to 180 C 356 F for D...

Page 145: ...20 mA Voltage output 0 1 V 0 5 V 0 10 V Accuracy of analog outputs at 20 C 0 05 full scale Temperature dependence of the analog outputs 0 005 C full scale External loads Current outputs RL 500 Ω 0 1V output RL 2 k Ω 0 5V and 0 10V outputs RL 10 k Ω Max wire size 0 5 mm2 AWG 20 stranded wires recommended Digital outputs RS 232 RS 485 optional Relay outputs optional 0 5 A 250 VAC SPDT Display option...

Page 146: ...perature range 40 60 C 40 140 ºF Power consumption Uout 0 1 V max 30 mA Uout 0 5V 0 10V max 30 mA Iout 0 20 mA max 60 mA External loads current outputs RL 500 ohms Max load cable loop resistance 540 ohms 0 1 V RL 2000 ohms 0 5 V and 0 10 V RL 10 000 ohms Storage temperature range 55 80 C 67 176 ºF 3 pole screw terminal Max wire size 1 5 mm2 AWG16 Relay Module Operating temperature range 40 60 ºC 4...

Page 147: ...midity range 5 95 RH Power consumption 24V max 60 mA Ethernet type 10 100Base T Connector RJ45 Supported protocols Telnet WLAN Interface Module Operating temperature range 20 60 ºC 4 140 ºF Storage temperature range 40 85 ºC 40 185 ºF Operating humidity range 5 95 RH Power consumption 24V max 80 mA Supported standards 802 11b Connector RP SMA Protocols Telnet Security WEP 64 128 WPA Data Logger Mo...

Page 148: ...215094 Panel Mounting frame 216038 PROBE MOUNTING ACCESSORIES DMT345 Mounting Flange for D13 5mm Probe 210696 DMT346 Cooling Set with Installation Flange DMP246CS Plug D13 5mm with Wire Rope 217738 Installation Flange for Cooling Set 217490 CONNECTION CABLES Serial Interface Cable 19446ZZ USB RJ45 Serial Interface Cable 219685 MI70 Connection Cable with RJ45 Connector 211339 OUTPUT CABLES for 8 pi...

Page 149: ...________________________________________________ Technical Data VAISALA ______________________________________________________________________ 149 Dimensions mm inch 0605 044 Figure 74 DMT345 346 Transmitter Body Dimensions ...

Page 150: ...ER S GUIDE____________________________________________________________________ 150 _________________________________________________________________ M210762EN D 0804 035 Figure 75 WLAN Antenna Dimensions ...

Page 151: ... into a process 0605 045 Figure 76 Cooling Set Installation 1 Make a round 89 5 0 5 mm hole on the process wall 2 Weld the tube of the mounting flange tightly on the inner metal plate of the process wall If the process wall is more than 125 mm thick a lengthening piece max 50 mm can be welded on the mounting tube for walls thicker than 175 mm see Figure 23 on page 37 3 The cooling set is mounted i...

Page 152: ... in place by tightening the locking screws on the bar Probe and Cooling Set Mounting with Process Shut Down Complete the entire mounting process as instructed on page 36 Probe and Cooling Set Mounting with Process Running First mount the cooling element and fins to warm it up tightly plug the hole for the probe in the cooling element for the duration of the warmup period After a few hours complete...

Page 153: ...d temperature From these values dewpoint mixing ratio absolute humidity and enthalpy in normal pressure are calculated using the following equations Dewpoint 1 log A Pw m T T n d 1 Pw is the water vapor pressure The parameters A m and Tn depend on temperature according to the following table t A m Tn 0 C 1 6 1134 9 7911 273 47 0 50 C 6 1078 7 5000 237 3 50 100 C 5 9987 7 3313 229 1 100 150 C 5 849...

Page 154: ...y x x T h 5 2 00189 0 01 1 15 273 4 The water vapor saturation pressure Pws is calculated by using two equations 5 and 6 3 o i i iT C T 5 where T temperature in K Ci coefficients C0 0 4931358 C1 0 46094296 10 2 C2 0 13746454 10 4 C3 0 12743214 10 7 3 1 4 ln ln i i i ws b b P 6 where bi coefficients b 1 0 58002206 104 b0 0 13914993 101 b1 0 48640239 10 1 b2 0 41764768 10 4 b3 0 14452093 10 7 b4 6 5...

Page 155: ... 155 The water vapor pressure is calculated using 100 ws w P RH P 7 Parts per million by volume is calculated using w w v P p P ppm 6 10 8 Symbols Td dewpoint temperature C Pw water vapour pressure hPa Pws water vapour saturation pressure Pa RH relative humidity x mixing ratio g kg p atmospheric pressure hPa a absolute humidity g m3 T temperature K h enthalpy kJ kg ...

Page 156: ...USER S GUIDE____________________________________________________________________ 156 _________________________________________________________________ M210762EN D ...

Page 157: ...www vaisala com M210762EN ...

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