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USER'S GUIDE

Calibration of Digital Transmitters with

Vaisala HUMICAP® Humidity Indicator

HMI41

Cables 19164ZZ and 25917ZZ

M210777EN-B

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Summary of Contents for HUMICAP HMI41

Page 1: ...USER S GUIDE Calibration of Digital Transmitters with Vaisala HUMICAP Humidity Indicator HMI41 Cables 19164ZZ and 25917ZZ M210777EN B...

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...

Page 3: ...tion 8 CHAPTER 3 CALIBRATION 11 Getting Started 11 One Point Offset and Gain Calibrations 15 HMI41 as a Reference Meter 15 HMI41 as a Terminal 17 Two Point Calibration 18 HMI41 as a Reference Meter 19...

Page 4: ...User s Guide ______________________________________________________________________ 2 ________________________________________________________________ M210777EN B This page intentionally left blank...

Page 5: ...ghout 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...

Page 6: ..._____________________________________________________________ M210777EN B Recycling Recycle all applicable material Dispose of batteries and the unit according to statutory regulations Do not dispose...

Page 7: ...art shall should Vaisala so require be sent to the works of Vaisala or to such other place as Vaisala may indicate in writing freight and insurance prepaid and properly packed and labelled unless Vais...

Page 8: ...User s Guide ______________________________________________________________________ 6 ___________________________________________________________________ M210777EN B This page intentionally left blank...

Page 9: ...9164ZZ for the calibration of HMP230 series digital transmitters 19165ZZ for the calibration of the HMD W20 30 and HMP130 series analogue transmitters 25917ZZ for the calibration of HMT100 HMT330 seri...

Page 10: ...memory Selecting HMI41 Calibrator Function The desired calibrator function is selected in the HMI41 setup menu To enter the setup mode first press the ON OFF button and the following appears RH set mi...

Page 11: ...MT330 series digital transmitters 4 HMI41 as a calibrator for the HMD W20 30 and HMP130 series analogue transmitters To calibrate HMP230 HMT100 or HMT330 series digital transmitters select number 3 wi...

Page 12: ...and until they are correct press ENTER and then ON OFF With the HMT100 and HMT330 use N 8 1 N none parity 8 data bits 1 stop bits These selections are stored in the HMI41 memory when HMI41 is turned...

Page 13: ...and gain corrections For performing a two point calibration you need two separate measurement points with a difference of at least 50 RH between them NOTE Two point calibration is not supported for H...

Page 14: ...gure 2 on page 13 The connector X5 is also used for mounting the RS485 422 serial port module or current loop module if a module is mounted it must first be removed for further details see the HMP230...

Page 15: ...______________________ Calibration VAISALA _______________________________________________________________________ 13 0605 010 Figure 2 Calibration Connector X5 in Series HMP230 Transmitters 0605 011...

Page 16: ...on and wait until the following text appears on the display RH If you press the HOLD button you will go on to two point calibration mode and if you press the MODE button you will go on to gain calibra...

Page 17: ...play RH In following chapters you will find instructions for performing offset and gain calibrations in two different ways HMI41 as a Reference Meter The HMI41 reference probe is used to show the corr...

Page 18: ...e the RH measured by the reference probe You can return to the previous display by pressing HOLD again When the readings have stabilized press ENTER in either of these two display modes to conclude th...

Page 19: ...nd line indicate the RH measured by the HMI41 probe Let the readings stabilize and press MODE The following appears RH set HMI41 now works only as a terminal for setting the humidity reading Numbers o...

Page 20: ...fully completed the calibration turn HMI41 off and disconnect the cable Two Point Calibration In two point calibration mode both offset and gain corrections are made This calibration mode is more accu...

Page 21: ...RH Numbers on the first line indicate the RH measured by the transmitter and numbers on the second line indicate the RH measured by the reference probe Let the readings stabilize If you prefer you ca...

Page 22: ...you prefer you can change the display to show the difference in the readings Press HOLD and a text similar to the following appears RH Numbers on the first line indicate how much the transmitter readi...

Page 23: ...off and disconnect the cable HMI41 as a Terminal HMI41 can also be used only as a terminal for visualizing and setting the transmitter s RH reading for example when the transmitter does not have a lo...

Page 24: ...itter You can now set the blinking reading to the correct value for example to the equilibrium RH of the salt solution with buttons and Press ENTER and the following appears RH Insert the transmitter...

Page 25: ...for example to the equilibrium RH of the salt solution with buttons and Press ENTER to conclude the calibration If the calibration has been successful the following text appears RH The data is now sto...

Page 26: ...User s Guide ______________________________________________________________________ 24 __________________________________________________________________ M210777EN B This page intentionally left blank...

Page 27: ...play What to Do What is the Reason RH Perform the calibration again This message may appear for example if the difference between the reference humidities in two point calibration is too small Wait Th...

Page 28: ...User s Guide ______________________________________________________________________ 26 __________________________________________________________________ M210777EN B This page intentionally left blank...

Page 29: ...tor Function For selecting the calibrator function press ON OFF until you can see some text on the display Then release the ON OFF button and press within 1 2 seconds both ENTER and MODE buttons until...

Page 30: ...Calibrations with HMI41 as a Reference Meter Display What to Do Press RH set min max hyst hold Lo bat Hi Pabs Pa g m T Td C F C F HMI41 has been turned on Indication of the software version if the ver...

Page 31: ...alibrations with HMI41 as a Terminal Display What to Do Press RH set min max hyst hold Lo bat Hi Pabs Pa g m T Td C F C F HMI41 has been turned on Indication of the software version if the version is...

Page 32: ...hold Lo bat Hi Pabs Pa g m T Td C F C F HMI41 has been turned on Indication of the software version if the version is 1 02 or more bat Hi Indication of the battery voltage RH Select the desired calibr...

Page 33: ...the display RH Let the readings stabilize Conclude the calibration or return to the previous display ENTER to conclude or HOLD to return to the previous display RH Calibration has been successful ON...

Page 34: ...H reading to the correct value e g to the equilibrium RH of the salt solution V number up or W number down ENTER RH Insert the transmitter probe to the higher humidity RH Let the readings stabilize MO...

Page 35: ...endix A _______________________________________________Quick Reference to Calibration VAISALA _______________________________________________________________________ 33 This page intentionally left bl...

Page 36: ...www vaisala com M210777EN...

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