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USER'S GUIDE

Calibration of Series HMD/W20/30 and

HMP130 Transmitters with

Vaisala HUMICAP® Indicator HMI41

U220EN11

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Summary of Contents for HMD20

Page 1: ...USER S GUIDE Calibration of Series HMD W20 30 and HMP130 Transmitters with Vaisala HUMICAP Indicator HMI41 U220EN11...

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: ...20en 1 1 Operating Manual 1996 08 29 i Contents 1 INTRODUCTION 1 1 1 HMI41 with calibration option 1 1 2 Selecting the HMI41 calibrator function 1 2 CALIBRATION 3 2 1 Getting started 3 2 2 Calibration...

Page 4: ...HMI41 Calibration Option Operating Manual 19165ZZ U220en 1 1 ii 1996 08 29 This page intentionally left blank...

Page 5: ...libration options please refer to corresponding manuals Calibration is quick and easy to perform In calibration the HMI41 measures relative humidity with the reference probe and receives the RH inform...

Page 6: ...librator for HMD W 60 70 and HMP140 series analogue transmitters 3 HMI41 as a calibrator for HMP230 series digital transmitters 4 HMI41 as a calibrator for the HMD W20 30 and HMP130 series analogue tr...

Page 7: ...may vary from 10 minutes to a couple of hours 2 1 Getting started After having selected the desired function Chapter 1 2 turn the HMI41 off and connect the calibration cable to the EXT connector at t...

Page 8: ...h the ON OFF button and wait until a text similar to the following appears on the display RH Numbers on the first line indicate the RH measured by the transmitter and numbers on the second line indica...

Page 9: ...ference probe If you wish you can now calibrate the transmitter by pressing MODE again the measured values appear on the display Wait until the readings have stabilized and adjust the calibration pote...

Page 10: ...unction 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 the text setup appears on the display Then...

Page 11: ...ge RH Let the readings stabilize and then adjust the transmitter potentiometers until the readings are the same offset 65 RH gain 65 RH Alternatively you can adjust the transmitter when the display sh...

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Page 14: ...www vaisala com U220EN...

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