Vaisala DRYCAP DMT340 SERIES User Manual Download

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USER'S GUIDE

Vaisala DRYCAP® Dewpoint and

Temperature Transmitter Series

DMT340

M210704EN-F

Summary of Contents for DRYCAP DMT340 SERIES

Page 1: ...USER S GUIDE Vaisala DRYCAP Dewpoint and Temperature Transmitter Series DMT340 M210704EN F...

Page 2: ...chanical 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 P...

Page 3: ...ER 2 PRODUCT OVERVIEW 17 Introduction to DMT340 17 Basic Features and Options 18 Structure of the Transmitter 19 Probe Options 21 CHAPTER 3 INSTALLATION 23 Mounting the Housing 23 Standard Mounting wi...

Page 4: ...Relay 59 RS 422 485 Interface 61 Installation and Wiring 62 LAN Interface 65 WLAN Interface 66 Attaching the WLAN Antenna 67 Data Logger Module 68 8 Pin Connector 70 CHAPTER 4 OPERATION 71 Getting St...

Page 5: ...SE 100 Formatting Serial Line Message 101 FTIME and FDATE 101 FST 102 General Settings 103 Changing the Quantities and Units 103 Using Display Keypad 103 Using Serial Line 104 FORM 104 UNIT 105 Pressu...

Page 6: ...atus 131 Enabling Disabling the Relays 133 Operation of the Indication LEDs 134 Setting the Relay Outputs 134 RSEL 135 Testing the Operation of Relays 137 RTEST 137 Sensor Functions 138 AutoCal 138 Au...

Page 7: ...int Relative Humidity Adjustment using Serial Line 162 One Point Dewpoint Adjustment using Display Keypad 162 One Point Dewpoint Adjustment using Serial Line 164 Adjusting Temperature 165 Adjusting Te...

Page 8: ...ALCULATION FORMULAS 181 APPENDIX B MODBUS REFERENCE 185 Function Codes 185 Register Map 186 Data Encoding 186 32 Bit Floating Point Format 186 16 Bit Integer Format 187 Measurement Data Read Only 188...

Page 9: ...ing the Nut 38 Figure 23 Cleaning of the Tightening Cone 38 Figure 24 DMT347 Probe with Swagelok Installation Kit 39 Figure 25 DMT347 Probe Installation to Pipeline with Swagelok Installation Kit 40 F...

Page 10: ...32 Figure 71 Relay Availability 134 Figure 72 Following AutoCal on the Display 139 Figure 73 Sensor Purge Settings 140 Figure 74 Performing Sensor Purge 140 Figure 75 Serial Interface Settings 145 Fig...

Page 11: ...e 16 Measurement Commands 96 Table 17 Formatting Commands 96 Table 18 Data Recording Commands 97 Table 19 Purge Commands 97 Table 20 Autocalibration Commands 97 Table 21 Calibration and Adjustment Com...

Page 12: ...USER S GUIDE____________________________________________________________________ 10 __________________________________________________________________ M210704EN F This page intentionally left blank...

Page 13: ...menclature of the DMT340 Chapter 3 Installation provides you with information that is intended to help you install the product Chapter 4 Operation contains information that is needed to operate the pr...

Page 14: ...rsion Added PuTTY terminal application instructions revised description of the MI70 Link software Removed instructions for HyperTerminal Documentation Conventions Throughout the manual important safet...

Page 15: ...a products are adequately protected against ESD for their intended use However it is possible to damage the product by delivering electrostatic discharges when touching removing or inserting any objec...

Page 16: ...d to provide reasonable protection against harmful interference in a residential installation Operation is subject to the following two conditions 1 this device may not cause interference and 2 this d...

Page 17: ...lies with Canadian ICES 003 Cet appareil num rique de la classe B est conforme la norme NMB 003 du Canada Patent Notice The Vaisala DRYCAP Dewpoint and Temperature Transmitter Series DMT340 is protect...

Page 18: ...information and our standard warranty terms and conditions www vaisala com services warranty html Please observe that any such warranty may not be valid in case of damage due to normal wear and tear e...

Page 19: ...0 C to 80 C 76 176 F The AutoCal feature provides excellent long term stability of the measurement DMT340 incorporates the advanced DRYCAP technology which enables reliable and high performance dewpoi...

Page 20: ...erature Td TD C F Dewpoint in the atmospheric pressure Td TDA C atm F atm Use these parameters only if you need dewpoint over water below 0 C 32 F and not over ice industry standard Basic Features and...

Page 21: ..._____________________________________ 19 Structure of the Transmitter 1104 001 Figure 1 Transmitter Body The numbers refer to Figure 1 above 1 Signal powering cable gland 2 Cable gland for optional mo...

Page 22: ...Figure 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...

Page 23: ...______________________________________________________ 21 Probe Options DMT342 small size flanged probe for use with sampling cell DMT344 for high pressure applications DMT347 probe with Swagelok conn...

Page 24: ...USER S GUIDE____________________________________________________________________ 22 __________________________________________________________________ M210704EN F This page intentionally left blank...

Page 25: ...__________ 23 CHAPTER 3 INSTALLATION Mounting the Housing The housing can be mounted either without the mounting plate or with optional mounting plates Standard Mounting without Mounting Plate Mount t...

Page 26: ...ng through back wall remove the plastic plug from the wiring hole in the transmitter before mounting 0503 004 Figure 5 Mounting with Wall Mounting Kit The numbers refer to Figure 5 above 1 Plastic mou...

Page 27: ...25 0503 041 Figure 7 Mounting with Metal Wall Mounting Plate The numbers refer to Figure 7 above 1 Mount the plate to wall with 4 screws M8 not provided 2 Fasten DMT340 to the mounting plate with 4 fi...

Page 28: ...includes a wall mounting kit 2 clip fasteners and 2 screws M4 x 10 DIN 7985 Vaisala order code 215094 1 Attach two spring holders to the plastic mounting plate by using the screws provided in the ins...

Page 29: ...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 upward see Figure 7 on...

Page 30: ...340 to the mounting plate with 4 fixing screws provided Panel Mounting Frame To enable a neat and dirt free embedded installation of the transmitter a panel mounting frame is available as an option Va...

Page 31: ..._____________________________ 29 4 Remove the paper protecting the adhesive tape on the frame and attach the frame around the transmitter Refer to Figure 13 below 0704 002 Figure 13 Panel Mounting Fra...

Page 32: ...11 mm The number of cable bushings depends on the transmitter options See the following recommendations for the cable bushings 0503 010 Figure 15 Cable Bushings The numbers refer to Figure 15 above 1...

Page 33: ...ctrical Cable Refer to Figure 16 on page 31 when performing the procedure below 1 Cut back outer sheath to desired length 2 Cut back screen braiding or screen foil to dimension X 3 Push the domed cap...

Page 34: ...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 t...

Page 35: ...cables to terminals RxD GND and TxD more about the RS 232 connection in Section Serial Line Communication on page 82 4 When wiring the optional modules see the corresponding section for instructions...

Page 36: ...Figure 18 on page 34 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 transmitter see the lower part of Fig...

Page 37: ...probe is a small pressure tight probe equipped with installation flange When sampling in pressurized processes the sampling cell HMP302SC is available as an optional accessory It may be necessary to...

Page 38: ...d processes it is essential to tighten the supporting nuts and screws very carefully to prevent loosening of the probe by the action of pressure NOTE When the DMT340 is installed in a process with a p...

Page 39: ...ghly polished surface of the probe Follow the instructions below to achieve a leak tight assembly 1 Remove the fitting screw from the nut and the probe 2 Fasten the fitting screw to the chamber wall w...

Page 40: ...e tightened without increased effort 6 Clean and grease the tightening cone of the fitting screw after every tenth detachment Change the sealing washer every time the fitting screw is detached Use hig...

Page 41: ...herboard using the serial line using the MODBUS protocol See section Pressure Compensation Setting on page 106 If you are using MODBUS see section Configuration Registers on page 189 DMT347 Small Pres...

Page 42: ...m probe 2 Probe position Before the final tightening check that the upper edge of the connector nut is in line with the upper edge of the probe Otherwise the sealing may not be gas tight 3 Gas tight s...

Page 43: ...Pipelines Due to the sliding fit the DMT348 is easy to install into and remove from the pressurized process The probe is especially suitable for the measurements in pipelines See section Ball Valve I...

Page 44: ...10704EN F 0503 005 Figure 27 Leak Screw in the DMT348 Probe The number refers to Figure 27 above 1 Non leaking screw A factory setting or leak screw B included in the package Table 4 DMT348 Probe Dime...

Page 45: ...probe to a suitable depth according to the type of installation 2 Tighten the clasp nut first manually 3 Mark the fitting screw and the clasp nut 4 Tighten the nut a further 50 60 ca 1 6 turn with a w...

Page 46: ...carefully to prevent loosening of the probe by the action of pressure NOTE Take care not to over tighten the clasp nut to avoid difficulties when opening it NOTE When the DMT340 is installed in a pro...

Page 47: ...ll valve assembly with a ball hole of 14 mm or more If you install the probe 12 mm in a process pipe please note that the nominal size of the pipe must be at least 1 inch 2 54 cm Use the manual press...

Page 48: ...ed to shut down the process 2 Close the ball valve 3 Seal the threads on the fitting body refer to Figure 28 on page 42 4 Attach the fitting body to the ball valve and tighten it 5 Slide the clasp nut...

Page 49: ...crew installation can be used In this installation method you must install the DMT348 probe using a fitting body with leak screw see Figure 27 on page 42 A small sample flow from the process goes thro...

Page 50: ...very hot 80 C or particularly dirty the probe is installed in a sampling cell behind a cooling coil and or filter In this case the ambient temperature must be at least 10 C warmer than the process dew...

Page 51: ...an be removed from the process for calibration or maintenance If the probe is installed in a pressurized chamber always make sure that the pressure of the chamber is equalized with the ambient pressur...

Page 52: ...larly dirty the probe is installed in a sampling cell behind a cooling coil and or filter In this case the ambient temperature must be at least 10 C warmer than the process dewpoint in order to avoid...

Page 53: ...g cell must not differ from that of the process because dewpoint temperature changes with pressure In dirty processes it may be necessary to use a filter between the cooling coil and the sampling cell...

Page 54: ...ted to the power supply module only by an authorized electrician A readily accessible disconnect device shall be incorporated in the fixed wiring 0506 027 Figure 36 Power Supply Module The numbers ref...

Page 55: ...on page 18 4 Connect the wires from the terminals of the power supply module marked with and to the terminals POWER 10 35 V 24V on the motherboard of the transmitter 5 Connect the AC mains voltage wir...

Page 56: ...n la terre T m tuote on pienj nnitedirektiivin 2006 95 EEC mukainen Vaihtovirtaliit nn n saa kytke tehonsy tt moduuliin ainoastaan valtuutettu s hk asentaja l irrota tehonsy tt moduulia l hettimest ku...

Page 57: ...chermend aardcontact aansluiten Este producto cumple con la directiva de bajo voltaje 2006 95 EEC La conexi n de la alimentaci n principal al m dulo de alimentaci n s lo puede realizarla un electricis...

Page 58: ...moduli no raid t ja kad piesl gta str va Nepievienot str vu baro anas avota modulim ja tas nav uzst d ts DMT340 raid t j Vienm r pievienot aizsarg jo u iezem tu termin lu Ten produkt spe nia wymogi D...

Page 59: ...e ordered with optional output isolation module This module prevents harmful grounding loops Installation NOTE Output isolation module is not needed when using the power supply module 0506 030 Figure...

Page 60: ...ODULE 2 4 Take out the protective plug from the cable gland and thread the wires 5 Connect the wires to the screw terminals marked with Ch and Ch 6 Select the current voltage output by setting ON eith...

Page 61: ...l 4 Connect the flat cable between the relay module and the motherboard s pins MODULE 2 or MODULE 1 5 Take out the protective plug from the cable gland and thread the relay wires 6 Connect the wires t...

Page 62: ...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 may contain dangerous voltages even if the transmitter power ha...

Page 63: ...485 converter for the network avoid self powered converters as they do not necessarily support the needed power consumption NOTE RS 232 User Port on DMT340 main board cannot be used and connected whe...

Page 64: ...x D0 5 D1 Tx D1 To avoid problems in the RS 422 485 network the Common terminal should be wired to the corresponding terminals of the other devices 6 If you use RS 422 or RS 485 to connect just one DM...

Page 65: ...R 120R 120R Twisted pair Stub Stub Baud 19 2K Stub 10ft 3m Baud 112K Stub 1ft 0 3m Rx D0 Rx D1 Common Tx D0 Tx D1 Switch Term off Term off 2 4 wire on RS422 off Tx D0 Tx D1 Common Rx D0 Rx D1 Switch T...

Page 66: ...wire off RS422 off Stub Stub Stub RS485 1 RS485 1 RS485 bus master Twisted pair Address NN Address MM Common D0 D1 Switch Term off Term off 2 4 wire off RS422 off Common D0 D1 5 4 3 2 1 5 4 3 2 1 120R...

Page 67: ...onal LAN interface are delivered pre installed with a suitable cable and cable gland The LAN interface can use both static and dynamic network settings If the interface is configured to use dynamic se...

Page 68: ...rface is in use serial communication using the RS 232 User Port is disabled The interface supports Wired Equivalent Privacy WEP and Wi Fi Protected Access WPA WPA2 For WEP 64 and 128 bit encryption is...

Page 69: ...se the device can be attacked by a malicious user through the network 0802 103 Figure 45 WLAN Interface Module The numbers refer to Figure 45 above 1 Flat cable connector 2 Connector for antenna cable...

Page 70: ...solution 3 hours 90 seconds 1 day 12 minutes 10 days 2 hours 2 months 12 hours 1 year 3 days 4 years 12 days The quantities that are logged are the same that have been selected for measurement using t...

Page 71: ...ake at least 10 seconds before the data logger module is initialized The instrument will not start up before the data logger module is ready The indicator LED on the module will blink green during nor...

Page 72: ...47 Pinout of the Optional 8 Pin Connector Table 9 Wiring of the Optional 8 Pin Connector Serial Signal Pin Wire RS 232 EIA 232 RS 485 EIA 485 Analog Signal 1 White Data out TX D1 2 Brown Serial GND S...

Page 73: ...ect on humidity calculations and accuracy Therefore accurate calculations can be achieved only when the ambient pressure is taken into consideration See page 106 for instructions on how to set the pre...

Page 74: ...ical basic display see section Changing the Quantities and Units on page 103 0706 009 Figure 48 Basic Display The numbers refer to Figure 48 above 1 INFO shorcut button 2 GRAPH shortcut button changes...

Page 75: ...vation Period Period for Trend Max Min Calculations Resolution 3 hours 1 5 minutes 1 day 12 minutes 10 days 2 hours 2 months 12 hours 1 year 3 days 4 year 12 days Shows the maximum logging period of t...

Page 76: ...he history graph change accordingly For an explanation of the effect of changing the date and time manually see section Data Logger Module on page 68 Table 11 Graph Information Messages Failure Messag...

Page 77: ...arrow buttons in the basic numeric display mode 2 Move in the menus by using the arrow buttons 3 Open a submenu with button 4 Press to return to the previous level 5 Function button EXIT returns you b...

Page 78: ...ght hand button to exit to the basic display Rounding Setting Round off one decimal by using the Rounding function The default setting is rounding on Rounding has no effect on quantities without decim...

Page 79: ...ad press the OPEN button for 4 seconds Menu PIN Lock You can prevent unauthorized changes of the device settings by activating the menu PIN lock When this function is activated the basic display graph...

Page 80: ...ture provides two independently configurable alarms for transmitters with the display keypad option Each alarm tracks a selected quantity with a freely configurable limit values Each alarm also has a...

Page 81: ...be shown on the display The next active alarm is revealed when the currently shown alarm is acknowledged by pressing the OK button Activated alarms are only shown on the screen there are no alarm mes...

Page 82: ...mit values move the selection over the Act above or Act below field and press the Set button You will be prompted to Modify or Remove the value 0802 070 Figure 55 Modifying an Alarm Limit When modifyi...

Page 83: ...c or graphical format for further use in a spreadsheet program such as Microsoft Excel or virtually any other application Follow the steps below to connect your transmitter to the MI70 Link program us...

Page 84: ...r 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 POLL and MODBUS modes For temporary connections use the...

Page 85: ...232 10 36 V 24 V IOIOI 0506 033 Figure 57 Connection Example between PC Serial Port and User Port Connections to pins 4 6 7 and 8 are required only if your software requires hardware handshaking User...

Page 86: ...sert the media that came with the cable or download the driver from www vaisala com 3 Execute the USB driver installation program setup exe and accept the installation defaults The installation of the...

Page 87: ...s 8 Stop bits 1 Flow control None For a detailed explanation of using a terminal program see section Terminal Program Settings on page 93 4 Power up the DMT340 LAN Communication To enable LAN communic...

Page 88: ...browsing to the IP address of the transmitter IP Address The four part network ID of the transmitter Must be set manually if automatic configuration is not used Example value 192 168 0 222 Netmask Us...

Page 89: ...s that are currently accessing the LAN or WLAN interface 5 In the IP configuration menu select Automatic configuration DHCP or enter the IP address Netmask and Gateway manually If automatic configurat...

Page 90: ...r OFF Enables or disables the Web Configuration page IP The four part network ID of the transmitter Must be set manually if automatic configuration is not used SUBNET Used together with the IP address...

Page 91: ...working products The WLAN interface supports both WPA and WPA2 also known as 802 11i security when either WPA PSK mode is selected If your WLAN network is using some other security method than listed...

Page 92: ...mitter refreshes the network information 4 Press the arrow button to select Wireless LAN settings 0802 111 Figure 60 Wireless LAN Settings 5 The Name entry on the page shows the SSID of the currently...

Page 93: ...rm the new settings Note that when new settings are saved all currently active WLAN connections are disconnected Using Serial Line Use the serial line command WLAN to view or set the wireless network...

Page 94: ...nterface Communication Protocol The commands for changing the settings are SMODE INTV ADDR and ECHO Web Configuration for LAN and WLAN The LAN and WLAN interfaces both have a web configuration page th...

Page 95: ...s below describe how to connect to the DMT340 using the PuTTY terminal application for Windows Perform the necessary cabling and configuration of the transmitter before following the instructions PuTT...

Page 96: ...ble 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...

Page 97: ...nsmitter acquires a 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...

Page 98: ...ontinuos Output Interval for RUN mode SEND 0 255 Output the reading once SMODE STOP RUN POLL MODBUS Set the Serial Interface mode SDELAY View or set user port RS232 or RS485 answer minimum delay SERI...

Page 99: ...E Recover the deleted files that have not been overwritten Table 19 Purge Commands Command Description PUR Purge settings PURGE Start manual purge Table 20 Autocalibration Commands Command Description...

Page 100: ...rmation text when adjustment enabled DATE Set date DSEND Output the reading also in poll mode ECHO Turn the serial interface echo ON OFF ERRS Display transmitter error messages FIND All devices in POL...

Page 101: ...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...

Page 102: ...normally whatever the SCOM definition may be Command names are case insensitive SCOM cr Example assigning the command MEASURE as an alias for the SEND command scom Send command measure measure Tdf 5 8...

Page 103: ...ommands described in this section you can use the FORM command with modifiers TIME DATE and STAT See section FORM on page 104 FTIME and FDATE FTIME and FDATE commands will enable disable output of tim...

Page 104: ...980 pw 12 00 hPa pws 29 91 hPa h 43 2 kJ kg purge Purge started press any key to abort send S 134 RH 40 2 RH T 24 1 C Td 9 8 C Tdf 9 8 C a 8 8 g m3 x 7 5 g kg Tw 15 7 C ppm 12084 pw 12 10 hPa pws 30 1...

Page 105: ...to open the Main Menu 2 Press the arrow button to select Display 3 Press arrow button to select Quantities 4 Select the quantity by using the arrow buttons Confirm the selection by pressing SELECT Yo...

Page 106: ...Table 2 on page 17 and Table 3 on page 18 The modifiers are presented in Table 25 below Table 25 FORM Command Modifiers Modifier Description x y Length modifier number of digits and decimal places t T...

Page 107: ...device configuration form Tdf 21 6 C H2O 874 ppmV T 22 2 C RH 3 3 RH UNIT Use the UNIT command to select metric or non metric output units and change the unit for the H2O quantity UNIT x cr where x U...

Page 108: ...ed 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 pr...

Page 109: ...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 A...

Page 110: ...13 25 hPa 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...

Page 111: ...ports only are cleared to 2000 01 01 00 00 00 at reset or at power failure Data Filtering The averaging data filter calculates a average over a certain period of time The lowest measurement noise is a...

Page 112: ...ress the INFO button in the basic display to see the following information Current sensor operation for example AutoCal or Purge in progress Present or past unacknowledged errors Device information Cu...

Page 113: ...isplay Use the serial line command to check the current transmitter configuration Command is similar but can also be used if the transmitter is in POLL mode cr Example DMT340 5 10 0 Serial number D114...

Page 114: ...ions are ON backlight always on OFF backlight always off AUTO backlight automatically turns on and off when keypad is used Example light Backlight OFF light auto Backlight AUTO HELP Use the HELP comma...

Page 115: ...ter error messages see Table 31 on page 155 Example no active errors errs No errors Example showing active error errs Error E2 Humidity sensor open circuit VERS Use the VERS command to display softwar...

Page 116: ...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 lock until the use...

Page 117: ...he arrow buttons to select and press SELECT to confirm your selection 5 Select the Protocol to be used by the serial output by pressing the CHANGE button Select the option using the arrow buttons and...

Page 118: ...e service port SERI Use the SERI command to set the communication settings for the user port Changed settings will be activated at next reset or power up SERI b p d s cr where b Bit rate 110 150 300 6...

Page 119: ...SEND addr command SEND addr and OPEN addr Other commands available after opening a line to the transmitter using the OPEN command Use with RS 485 buses where multiple transmitters can share the same l...

Page 120: ...ple setting the output interval to 10 minutes intv 10 min Output interval 10 min Setting RUN output interval to zero enables the fastest possible output rate SDELAY With the SDELAY command you can set...

Page 121: ..._ 119 ECHO Use the ECHO command to set the user port echo The command either enables or disables echo of characters received ECHO x cr where x ON enabled default or OFF disabled NOTE When using the RS...

Page 122: ...m Selecting the Data Recording Quantities If the device is provided with the optional display the recorded quantities are always those selected for the display Up to four quantities can be recorded at...

Page 123: ...e description Oldest data available No of points 1 T 90 s intervals 2007 05 30 05 25 30 1555200 2 T 12 min intervals 2007 05 29 05 48 00 194400 3 T 2 h intervals 2007 05 19 02 00 00 19440 4 T 12 h int...

Page 124: ...n the following format yyyy mm dd start_time Starting time of the interval to be outputted Must be given in the format hh mm ss or h mm end_date Ending date of the interval to be outputted Must be giv...

Page 125: ...emories by pressing the CLEAR button Press the YES button to confirm the selection CAUTION This function clears the entire data history of the transmitter including all graphs and the content of the o...

Page 126: ...ent Voltage Switches of Output Modules The numbers refer to Figure 68 above 1 Current voltage selection output switches from 1 to 2 2 Current voltage range selection switches from 3 to 7 in analog out...

Page 127: ...nging the output mode range See section Analog Output Fault Indication Setting on page 128 Analog Output Quantities Use the display keypad to change and scale the analog output quantities 1 Press any...

Page 128: ...ith the AMODE command AMODE cr Example amode Ch1 output 0 1V Ch2 output 0 1V Select and scale the quantities for the analog outputs with the command ASEL Note that the optional quantities can be selec...

Page 129: ...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 bas...

Page 130: ...utton 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 v...

Page 131: ...Any of the quantities available 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 l...

Page 132: ...e 69 Measurement Based Relay Output Modes Mode 4 is usually used if an alarm needs to be triggered when the measured value exceeds a safe range The relay is active when measurement is in range and is...

Page 133: ...activates when the dewpoint reaches 30 C As the dewpoint then decreases relay releases at 32 C rsel tdf t Rel1 Tdf above 30 Rel1 Tdf below 30 00 C Rel1 Tdf hyst 5 00 C 2 Rel1 Tdf enabl ON Rel2 T above...

Page 134: ...e sensor purge or adjustment mode relay released C and NC outputs are closed See Figure 70 on page 132 for illustrative examples of the FAULT ONLINE STATUS relay output modes 1102 040 Figure 70 FAULT...

Page 135: ...Not chosen Power off Measured Td f above 10 C Td f below 10 C Measured Td f below 10 C Measured Td f above 10 C Td f above 10 C Measured Td f below 10 C Measurement OK Fault status Error active Measur...

Page 136: ...s to Figure 71 above 1 Lists enabled relays Activation state shown in black Disabled relays are not shown Use the display keypad to set the relay outputs 1 Press any of the arrow buttons to open the M...

Page 137: ...relay 1 or Fault Online q2 Quantity for the relay 2 or Fault Online q3 Quantity for the relay 3 or Fault Online q4 Quantity for the relay 4 or Fault Online Factory setting All relays disabled Use the...

Page 138: ...above 60 00 RH 70 Rel1 RH below 70 00 RH Rel1 RH hyst 2 00 RH 2 Rel1 RH enabl ON on Rel2 T above 50 00 C 60 Rel2 T below 40 00 C Rel2 T hyst 2 00 C 2 Rel2 T enabl ON on Rel3 Td above 5 00 C 10 Rel3 Td...

Page 139: ...on 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...

Page 140: ...DMT340 DRYCAP M sensor Temperature must be 0 T 80 C or sensor warming activated for 40 T 80 C Humidity environment must be stable The maximum change in the dewpoint can be 2 C in 15 seconds NOTE Auto...

Page 141: ...manually by using the pressure set and check buttons on the motherboard By pressing both buttons simultaneously Autocal is performed see Figure 66 on page 107 Sensor Purge Sensor Purge is a feature a...

Page 142: ...ttons 2 Select Measuring press button 3 Select Purge press button 1103 067 Figure 73 Sensor Purge Settings Start the sensor purge manually by selecting Start purge now and pressing START Select Purge...

Page 143: ...or is exposed to chemicals it is recommended to have the sensor purge done at least once in 720 min 12 hours In applications where the chemical exposure is not likely the interval can be longer PUR cr...

Page 144: ...ge OFF RH trigger 20 RH NOTE To activate the new interval settings immediately reset the transmitter NOTE When sensor purge in power up is enabled wait about 6 min after power up before taking measure...

Page 145: ...he connections they use are listed in Table 30 below Table 30 Supported MODBUS Variants Supported MODBUS Variant Connections MODBUS RTU Serial MODBUS RS 232 standard User Port RS 422 428 Interface opt...

Page 146: ...age 147 After configuring the transmitter perform the transmitter installation and wiring according to the instructions in Chapter 3 Installation on page 23 The configuration instructions assume you a...

Page 147: ...s screen Enable the MODBUS protocol Change the baud rate and parity if necessary Set the MODBUS device address 1101 033 Figure 75 Serial Interface Settings 4 After changing the settings press the EXIT...

Page 148: ...User Port For example to set the User Port serial settings to 19200 N 8 1 issue the following command seri 19200 N 8 1 NOTE The number of data bits must always be 8 for MODBUS RTU Serial MODBUS inter...

Page 149: ...is used Using Display Keypad Optional 1 Open the Main Menu by pressing any of the arrow buttons 2 Navigate to Interfaces Network Settings IP Configuration 3 On the IP Configuration screen set the netw...

Page 150: ...complete as configuration changes made with the display and keypad are effective immediately Using Serial Line 1 Open the transmitter cover 2 Connect power supply wiring if not using the power supply...

Page 151: ...hout parameters and enter the settings as prompted net DHCP ON OFF IP address 0 0 0 0 143 154 142 102 Subnet mask 0 0 0 0 255 255 0 0 Default gateway 0 0 0 0 Web config ON OFF Save changes Y N y OK b...

Page 152: ...the counters Enter the Main Menu and navigate to System Diagnostics MODBUS Counters 1101 037 Figure 79 MODBUS Counters Viewing Counters Using Service Port Use the MODBUS command to view the counters...

Page 153: ...sabling MODBUS If you stop using MODBUS with the transmitter set the transmitter to some other operating mode using the display keypad option or the SMODE command For example to return the transmitter...

Page 154: ...USER S GUIDE____________________________________________________________________ 152 _________________________________________________________________ M210704EN F This page intentionally left blank...

Page 155: ...l a new filter on the probe When using the stainless steel filter take care to tighten the filter properly recommended force 5 Nm New filters can be ordered from Vaisala see Available Options and Acce...

Page 156: ...n Setting on page 128 Serial port outputs stars instead of measurement data Display shows instead of measurement data Cover LED is blinking Error indicator is shown on the display 0706 017 1103 069 Fi...

Page 157: ...e faulty unit to Vaisala Service E12 E13 Add on module 1 or 2 connection failure Turn off the power and check the module connection Turn on the power E14 Device internal temperature out of range Ensur...

Page 158: ...vide at least the following supporting information Name and model of the product in question Serial number of the product Name and location of the installation site Name and contact information of a t...

Page 159: ...ter DM70 can also be used to calibrate the transmitter User Calibration and Adjustment When adjusting DMT340 the reading is changed to correspond to the reference value After the adjustment the origin...

Page 160: ...tton in the main view or with serial commands and CDATE or check the date from the Device information See section Device Information on page 110 Opening and Closing the Adjustment Mode Open the transm...

Page 161: ...e press SET Enter the date by using the arrow buttons Press OK 4 Select i press CHANGE Enter information text including 17 characters at maximum by using the arrow buttons Press OK 5 Press EXIT to ret...

Page 162: ...M sensor the humidity references of 0 for example Nitrogen and 10 20 are required NOTE For the DMT340 M sensor both reference humidities must be below 20 RH To make the adjustment follow the instructi...

Page 163: ...the arrow buttons to enter the actual humidity of the reference used 0706 021 Figure 84 Ending Adjustment of Point 1 6 Continue adjustment of point 2 as instructed by the display 0706 022 Figure 85 Pr...

Page 164: ...90 Ref1 0 Press any key when ready RH 3 90 Ref2 15 OK One Point Dewpoint Adjustment using Display Keypad Before proceeding with the T d f adjustment you must perform the RH adjustment For DMT340 DRYCA...

Page 165: ...purge before proceeding with the adjustment Press READY when stabilized 0706 025 Figure 88 Proceeding with T d f Adjustment 7 Enter the actual reference frostpoint temperature 8 The transmitter perfor...

Page 166: ...the manual purge See section PURGE on page 141 3 Wait at least 1 hour Then press adjustment button on the motherboard inside the transmitter to enable adjustments 4 Use the IK command to perform the...

Page 167: ...ent Press START to start adjusting 4 Remove the filter from the probe and insert the probe into a reference temperature 5 Wait at least 30 minutes for the sensor to stabilize Follow the stabilization...

Page 168: ...nce temperature after the question mark and press ENTER three times When having another reference temperature 2 point calibration press ENTER twice and insert the probe to the second reference When th...

Page 169: ...ted 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 arr...

Page 170: ...ing 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 ACAL cr Example current outputs ACAL Ch1 I1...

Page 171: ...70 80 C 94 176 F Td For continuous use 70 45 C 94 113 F Td Accuracy up to 20 bar 290 psia see the accuracy graph 20 50 bar 290 725 psia 1 C Td Dewpoint temperature C Temperature of measured gas C 0 40...

Page 172: ...ity up to 180 C 356 F for transmitter body 40 60 C 40 140 F with display 0 60 C 32 140 F Storage temperature range without display 55 80 C 67 176 F with display 40 80 C 40 176 F Pressure and temperatu...

Page 173: ...nnish French German Japanese Russian Spanish Swedish Mechanics Cable bushing M20x1 5 for cable diameter 8 11mm 0 31 0 43 Conduit fitting 1 2 NPT User cable connector optional M12 series 8 pin male opt...

Page 174: ...perature range 40 60 C 40 140 F 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 oh...

Page 175: ...8C RJ45 IPv4 address assignment DHCP automatic static Protocols Telnet MODBUS TCP Max number of Telnet MODBUS clients 1 WLAN Interface Module Operating temperature range 20 60 C 4 140 F Storage temper...

Page 176: ...MT342 Sampling Cell for Probe with Flange HMP302SC 5 pcs O ring Set Size 14 1 1 6 216026 DMT344 Fitting Body M22 1 5 17223SP Fitting Body NPT1 2 17225SP DMT347 Swagelok for 12mm Probe 3 8 ISO Thread S...

Page 177: ...____________ 175 Description Order Code CABLE BUSHINGS Cable Gland M20 1 5 for 8 11mm Cable 214728SP Cable Gland M20 1 5 for 11 14mm Cable 214729 Conduit Fitting M20 1 5 for NPT1 2 Conduit 214780SP Du...

Page 178: ...______________________________________________________________ 176 _________________________________________________________________ M210704EN F Dimensions mm inch 0506 035 Figure 91 DMT340 Transmitte...

Page 179: ...__________________________________________ Technical Data VAISALA ______________________________________________________________________ 177 0804 035 Figure 92 WLAN Antenna Dimensions 0506 034 Figure...

Page 180: ...________________________________________________________ 178 _________________________________________________________________ M210704EN F 0503 044 Figure 94 DMT342 Probe Dimensions 0804 059 Figure 95...

Page 181: ...______________________________________ Technical Data VAISALA ______________________________________________________________________ 179 0804 129 Figure 96 DMT347 Probe Dimensions 0704 054 Figure 97 D...

Page 182: ..._________________________________________________ 180 _________________________________________________________________ M210704EN F 0704 056 Figure 98 NPT 1 2 Nut Dimensions 0704 055 Figure 99 DMT348...

Page 183: ...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 vap...

Page 184: ...x x T h 5 2 00189 0 01 1 15 273 4 The water vapour 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 0 460...

Page 185: ...183 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...

Page 186: ...USER S GUIDE____________________________________________________________________ 184 _________________________________________________________________ M210704EN F This page intentionally left blank...

Page 187: ...0x04 Read Input Registers Class 1 05 0x05 Write Single Coil Class 1 06 0x06 Write Single Register Class 1 07 0x07 Read Exception Status Class 1 08 0x08 Diagnostics 15 0x0F Write Multiple Coils Class...

Page 188: ...PDU The register map is the same for all MODBUS function codes For example function codes 03 and 04 return exactly same result as do 01 and 02 Function codes 01 and 02 return 0 if the corresponding re...

Page 189: ...65535 1 65534 2 etc NOTE Measurement parameters with normally positive values for example 0 100 RH may occasionally return small negative values because of measurement inaccuracy These negative values...

Page 190: ...de this 16 bit signed integer range Maximum writable value is 32767 also for configuration registers that do not accept negative values Measurement Data Read Only Table 36 Measurement Data Registers N...

Page 191: ...on Status function code 07 For details see section Exception Status Outputs on page 190 Configuration Registers Configuration parameter registers are used to configure the measurement Writing out of r...

Page 192: ...ss write 1 for manual start AutoCal in progress 1286 1 AutoCal in progress write 1 for manual start Flags 1281 and 1282 are mutually exclusive Some of the configuration registers might not have an eff...

Page 193: ...s a logical OR of these two status registers 04 0x04 Force Listen Only Mode Puts device off line 10 0x0A Clear Counters and Diagnostic Register Diagnostic Register cannot be cleared 11 0x0B Return Bus...

Page 194: ...ial number e g D0710040 0x81 CalibrationDate Date of the last calibration e g 2011 02 07 empty if not available 0x82 CalibrationText Information text of the last calibration empty if not available Exc...

Page 195: ...Appendix B ______________________________________________________ MODBUS Reference VAISALA ______________________________________________________________________ 193...

Page 196: ...www vaisala com M210704EN...

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