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USER'S GUIDE____________________________________________________________________  

>CT -70 0 101 -0.5 
> 
 

Use an accurate and calibrated reference only. 

CT Temperature Calibration of the 
Additional Sensor Head 

Two Point Calibration 

 CTA  <cr> 

Using this command the transmitters can be calibrated against an 
accurate reference, such as a Pt 100 simulator. A two-point calibration is 
performed as follows: 

>CTA <cr> 
T  :  23.19 Ref1 ? 

23.3 <cr> 

Press any key when ready ... 
T  :  101.42 

Ref2 ? 

101 <cr> 

 

If the stabilization of the sensor to the temperature of the reference needs 
to be monitored, the measurement output can be repeated with <cr> at 
Ref1 and Ref2: 

>CTA <cr> 
T  :  23.19 Ref1 ? 

 <cr> 

T  :  23.20 Ref1 ? 

 <cr> 

. 
. 
. 
T  :  23.22 Ref1 ? 

23.3 <cr> 

Press any key when ready ... 
T  :  101.42 

Ref2 ? 

101 <cr> 

 

38 ____________________________________________________________________ U339EN-1.3 

Summary of Contents for HUMICAP HMM213

Page 1: ...USER S GUIDE Vaisala HUMICAP Humidity and Temperature Module HMM213 U339EN 1 3 ...

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: ...APTER 3 TO BE NOTED WHEN MEASURING HUMIDITY 17 CHAPTER 4 INSTALLATION 19 Selecting Location 19 Electrical Connections 19 Dimensions 20 Serial Bus Settings 20 CHAPTER 5 SERIAL COMMANDS 21 Output via the Serial Bus 21 R Starting the Measurement Output 21 S Stopping the Measurement Output 21 SEND Outputting a Reading Once 22 INTV Setting the Output Interval for the RUN State 22 SERI Serial Bus Settin...

Page 4: ...With the Hand Held Humidity and Temperature Meter HM70 or HMI41 Indicator and Calibration Cable 34 Calibration Table 36 Temperature Calibration 36 CT Temperature Calibration of the Warmed Humidity Sensor Head 36 Two Point Calibration 36 One Point Calibration 37 Gain Calibration 37 CT Temperature Calibration of the Additional Sensor Head 38 Two Point Calibration 38 One Point Calibration 39 Gain Cal...

Page 5: ...______________________________________________________________________ CHAPTER 10 TECHNICAL DATA 49 Specifications 49 Options 50 VAISALA ________________________________________________________________________ 5 ...

Page 6: ...Air and the Sensor is 1 C 18 Figure 2 Electrical Connections 19 Figure 3 Dimensions in mm inches 20 Figure 4 Calibration Connector for the HM70 or HMI41 34 Figure 5 Decrease of the Sensor Gain Due to an Interfering Chemical and the Effect of the Chemical Purge Process 41 Figure 6 Dewpoint Temperature 49 6 _____________________________________________________________________ U339EN 1 3 ...

Page 7: ... Greenspan s Calibration Table with Output Values According to the Chosen Scale 36 Table 7 Available Spare Parts 43 Table 8 Relative Humidity Specifications 49 Table 9 General Specifications 50 Table 10 Operating Voltage Specifications 50 Table 11 Modules Sensor Heads and Outputs 50 Table 12 Cable Lengths for Sensor Heads 51 Table 13 Chemical Purge 51 VAISALA ______________________________________...

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Page 9: ...easuring Humidity describes issues that need to be noted in the measurement of humidity Chapter 4 Installation provides you with information that is intended to help you install this product Chapter 5 Serial Commands contains information that is needed to use the serial commands for this product Chapter 6 Calibration contains information that is needed to calibrate this product Chapter 7 Chemical ...

Page 10: ...85EN C Vaisala Humidity Calibrator HMK15 User s Guide M210297EN E Vaisala HUMICAP Hand Held Humidity and Temperature Meter HM70 User s Guide General Safety Considerations Throughout the manual important safety considerations are highlighted as follows WARNING Warning alerts you to a serious hazard If you do not read and follow instructions very carefully at this point there is a risk of injury or ...

Page 11: ...tion can damage the product or lead to malfunction CAUTION Do not touch the sensor element ESD Protection Electrostatic Discharge ESD can cause immediate or latent damage to electronic circuits Vaisala 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 12: ... standards The emission and immunity tests have been performed according to standard EN61326 1 Table 3 Emission Tests Test Setup According to RF field emission CISPR 22 Class B EN55022 Conducted emissions CISPR 22 B EN55022 Table 4 Immunity Tests Test Setup According to Electrostatic discharge IEC 1000 4 2 EN 61000 4 2 Fast transient burst IEC 1000 4 4 EN 61000 4 4 RF field immunity IEC 1000 4 3 E...

Page 13: ...s own option replace the defective Product or part thereof free of charge and otherwise on the same conditions as for the original Product or part without extension to original warranty time Defective parts replaced in accordance with this clause shall be placed at the disposal of Vaisala Vaisala also warrants the quality of all repair and service works performed by its employees to products sold ...

Page 14: ...uct as well as any adding to it without Vaisala s prior authorization e other factors depending on the Customer or a third party Notwithstanding the aforesaid Vaisala s liability under this clause shall not apply to any defects arising out of materials designs or instructions provided by the Customer This warranty is expressly in lieu of and excludes all other conditions warranties and liabilities...

Page 15: ...d humidity sensor head incorporating a composite sensor and an additional temperature sensor head for ambient temperature measurement The HMM213 is a RS232 serial output module The customer has two options for the humidity probe length Furthermore the module can also be ordered with a suitable cable length 0 65 m 1 50 m or 3 0 m The temperature measurement range is 70 180 C Output parameters depen...

Page 16: ...e the HUMICAP 180R humidity sensor which uses an operating principle based on changes in the capacitance of a thin polymer film as it absorbs water molecules The HMM213 modules measure temperature with the reliable Pt 100 sensor If the module is ordered with chemical purge option it incorporates a composite sensor 16 ____________________________________________________________________ U339EN 1 3 ...

Page 17: ...y is 90 RH the error is about 5 4 RH A graph of the measurement error at 100 RH when the temperature difference between ambient air and the sensor is 1 C is presented in Figure 1 on page 18 The error is at its greatest when the temperature of the sensor differs from that of the surroundings and the humidity is high A difference of a few degrees in temperature may cause water to condense on the sen...

Page 18: ...rement Error at 100 RH when the Temperature Difference between the Ambient Air and the Sensor is 1 C NOTE With a dewpoint module the temperature equilibrium is not a problem as the temperature of the sensor head changes continuously and the sensor head has a fast humidity response 18 ____________________________________________________________________ U339EN 1 3 ...

Page 19: ...around the sensor head Install the sensor head to a sufficient distance from the duct or chamber walls Make sure to insert enough cable to the same space with the probe in order to prevent heat conduction If an additional temperature probe is used install it so that the warmed sensor head does not interfere with the measurement Electrical Connections The HMM213 module is connected to a process con...

Page 20: ...imensions 65 2 56 0 14 26 1 02 Figure 3 Dimensions in mm inches Serial Bus Settings The serial communication parameters set at factory are Parameter Value Baud 1200 Parity None Data bits 8 Stop bits 1 20 ____________________________________________________________________ U339EN 1 3 ...

Page 21: ...al is set with command INTV The output format depends on the transmitter configuration and parameters in use The order however is always the same relative humidity temperature and dewpoint An example RH 43 0 RH T 21 0 C Tdp 8 0 C cr lf When the transmitter sends out the readings the serial interface does not echo any commands the only command that can be used is S stop S Stopping the Measurement O...

Page 22: ...via the serial line The output format depends on which parameters the transmitter can output Output types are RH 32 25 RH T 25 74 C cr lf Td 7 93 C cr lf INTV Setting the Output Interval for the RUN State INTV xxx yyy cr xxx output interval 0 255 0 no pause between outputs yyy unit s min or h Sets the output interval when the transmitter outputs measurement readings to a peripheral device For exam...

Page 23: ...ommunication parameters 1200 N 8 1 Example of changing the serial bus settings seri 1200 e 7 1 Communication parameters 1200 E 7 1 Set terminal settings accordingly ADDR Setting the Device Address ADDR x x 0 99 The command is used to give an address for one device The address is necessary for communication with a specific transmitter in POLL mode when there are several modules connected to one ser...

Page 24: ...mand for setting the non metric units is UNIT N cr Unit non metric When the command is given with no parameters the transmitter outputs the currently valid setting VERS Displaying Software Version VERS VERS HMM213 1 03 RESET Resetting the Transmitter RESET cr Resets the transmitter All settings that have been changed stay in the memory even after reset or power failure 24 _________________________...

Page 25: ...N aa cr SMODE xxxx cr aa address of the transmitter xxxx STOP RUN or POLL The OPEN command sets the bus temporarily in STOP MODE so that the SMODE command can be given For example SMODE cr which mode is in use at the moment Output mode STOP SMODE STOP cr setting STOP mode Output mode STOP OPEN CLOSE OPEN nn cr nn address of the transmitter 0 99 CLOSE cr In STOP mode command OPEN has no effect CLOS...

Page 26: ...CII 7 OPEN 2 cr cr lf HMM nn line opened for operator commands cr lf bel CRH cr CLOSE cr cr lf lf line closed cr lf Setting the Output Format MCR Setting the Carriage Return On Off MCR x x ON OFF MCR ON Msg cr ON MDEC Selecting a Decimal Separator MDEC x x a character TAB SP CR LF MDEC dec separator R RH 60 50 RH T 23 90 C RH 60 50 RH T 23 90 C MDEC Z dec separator Z R RH 60Z56 RH T 23Z89 C RH 60Z...

Page 27: ...SP R RH 60 53 RH T 23 89 C RH 60 52 RH T 23 89 C MFLD TAB fld separator TAB R RH 60 58 RH T 23 89 C RH 60 57 RH T 23 89 C MLF Setting the Line Feed On Off MLF x x ON OFF MLF OFF Msg lf OFF R RH 60 78 RH T 23 84 C repeating values MLF ON Msg lf ON R RH 60 85 RH T 23 86 C RH 60 80 RH T 23 86 C VAISALA _______________________________________________________________________ 27 ...

Page 28: ...ace OFF R RH57 52 RH T73 81 F RH57 50 RH T73 77 F RH57 44 RH T73 76 F MSPC ON Msg space ON R RH 57 55 RH T 73 78 F RH 57 55 RH T 73 78 F RH 57 48 RH T 73 82 F MSYMB Setting Variable Symbols On Off MSYMB x x ON OFF MSYMB ON Msg symbol ON R RH 60 86 RH T 23 87 C RH 60 86 RH T 23 87 C MSYMB OFF Msg symbol OFF R 60 91 RH 23 87 C 60 84 RH 23 87 C 28 _____________________________________________________...

Page 29: ...ial Commands MUNIT Setting Variable Units On Off MUNIT x x ON OFF MUNIT ON Msg unit ON R RH 61 01 RH T 23 85 C RH 60 99 RH T 23 85 C MUNIT OFF Msg unit OFF R RH 60 97 T 23 84 RH 60 98 T 23 87 VAISALA _______________________________________________________________________ 29 ...

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Page 31: ...e hour for the stabilization of the calibrator for example HM70 hand held humidity and temperature meter with a reference probe Calibration of a dewpoint module or of a humidity and temperature module with two sensor heads allow at least 3 hours for stabilization if the sensor head is in such an environment that the warming function has been active Calibration of a module with chemical purge optio...

Page 32: ...ator and the probe for at least 1 hour in the same environment so that their temperatures have time to equalize 2 Remove the sintered filter and insert the probe into the measurement hole of the LiCl salt chamber in the humidity calibrator 3 Give the command CRH and the following text appears CRH cr RH 12 00 Ref1 4 Wait for 20 to 40 minutes If the stabilization of the sensor to the humidity in the...

Page 33: ... first point and repeat the procedure if necessary One Point Calibration CRH xx xx yy yy xx xx current humidity yy yy offset calibration Example of performing the offset calibration in one reference point crh 54 63 2 3 Use an accurate and calibrated reference only Gain Calibration CRH 0 0 xx xx yy yy xx xx current humidity yy yy correction RHref RHmeasured Example of performing the gain calibratio...

Page 34: ...nstructions see the following documents Vaisala HUMICAP Indicator HMI41 and Probes HMP41 45 46 User s Guide Vaisala HUMICAP Hand Held Humidity and Temperature Meter HM70 Calibration of Digital Transmitters with Vaisala HUMICAP Humidity Indicator HMI41 Cables 19164ZZ and 25917ZZ User s Guide 1 2 Figure 4 Calibration Connector for the HM70 or HMI41 The following numbers refer to Figure 4 above 1 For...

Page 35: ...essage CON ERROR blinks on the HMI41 display for a couple of times after which measurement readings appear This is quite normal and requires no action however if the message is not replaced by measurement readings it is an indication of an operation error VAISALA _______________________________________________________________________ 35 ...

Page 36: ...justments have changed do not perform a temperature calibration This is a very demanding procedure and requires both expertise and extremely accurate references Furthermore it is important to allow enough time for the stabilization during calibration If for some reason it is necessary to perform the temperature calibration follow attentively the instructions given below Use an accurate and calibra...

Page 37: ...ure yy yy offset correction Example of performing the offset calibration in one reference temperature CT 21 2 2 3 Use an accurate and calibrated reference only Gain Calibration CT xx 0 yy yy zz zz xx temperature in which there is no changes in offset yy yy current temperature zz zz correction Tref Tmeasured Example of performing the gain calibration in one reference point without changing the offs...

Page 38: ...reference such as a Pt 100 simulator A two point calibration is performed as follows CTA cr T 23 19 Ref1 23 3 cr Press any key when ready T 101 42 Ref2 101 cr If the stabilization of the sensor to the temperature of the reference needs to be monitored the measurement output can be repeated with cr at Ref1 and Ref2 CTA cr T 23 19 Ref1 cr T 23 20 Ref1 cr T 23 22 Ref1 23 3 cr Press any key when ready...

Page 39: ...n Calibration CTA xx 0 yy yy zz zz xx temperature in which there is no changes in offset yy yy current temperature zz zz correction Tref Tmeasured Example of performing the gain calibration in one reference point without changing the offset at 0 C CTA 0 0 101 0 5 Example of performing the gain calibration in one reference point without changing the offset at 70 C CTA 70 0 101 0 5 Use an accurate a...

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Page 41: ...hemical is evaporated by heating the humidity sensor to a temperature level of approximately 160 C Automatic chemical purge takes place at startup Chemical purge Calibration values Measured values after chemical exposure Humidity Output signal Figure 5 Decrease of the Sensor Gain Due to an Interfering Chemical and the Effect of the Chemical Purge Process The sensor with chemical purge option is a ...

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Page 43: ...e the sensor by the plastic socket Recalibrate the transmitter CAUTION Do not touch the sensor element Replace a dirty filter to ensure a maximum lifetime and a fast response for the sensor Replacing Consumables This section describes how to replace consumables Parts List for Consumables Table 7 Available Spare Parts Spare Part Order Code HUMICAP 180R Sensor HUMICAP180R Stainless steel sintered fi...

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Page 45: ...nd environment When did it fail date immediately after a while periodically randomly How many failed only one defect other same or similar defects several failures in one unit What was connected to the product and to which connectors Input power source type voltage and list of other items lighting heaters motors etc that were connected to the same power output What was done when the failure was no...

Page 46: ...s on page 47 Please have the following information on hand serial number of the unit date and place of purchase or last calibration description of the fault circumstances in which the fault occurs occurred name and contact information of a technically competent person who can provide further information on the problem 3 Pack the faulty product in a strong box of adequate size with proper cushionin...

Page 47: ...tions and adjustments as well as repair and spare part services See contact information below Vaisala Service Centers also offer accredited calibrations maintenance contracts and a calibration reminder program Do not hesitate to contact them to get further information VAISALA _______________________________________________________________________ 47 ...

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Page 49: ...time 90 at 20 C in still air with sintered filter 60 s Typical temperature dependence of electronics 0 02 RH C Humidity sensor HUMICAP 180R Temperature measurement range 70 180 C Typical accuracy of electronics at 20 C 0 1 C Typical temperature dependence of electronics 0 0025 C C Temperature sensor Pt 100 RTD 1 3 IEC 751 Class B 0 1 2 3 4 5 0 20 40 60 80 Dewpoint difference C Accuracy in dewpoint...

Page 50: ...ly possible without warming or chemical purge option Current consumption without warming or chemical purge option Voltage output 12 mA at 35 VDC 20 mA at 24 VAC Average power needed during warming option 1 W 100 300 mA modulated current Maximum power needed during chemical purge option 1 4 W 100 300 mA modulated current Options Table 11 Modules Sensor Heads and Outputs Module Sensor Heads Output R...

Page 51: ...________________________ 51 Table 12 Cable Lengths for Sensor Heads Sensor Head Cable Length Humidity sensor head 65 150 300 cm Optional T sensor head module with two sensor heads 150 or 300 cm Table 13 Chemical Purge Module Automatic Chemical Purge at Startup RH and T module Yes Dewpoint module Yes RH and T module with two sensor heads Yes ...

Page 52: ...www vaisala com U339EN ...

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