Vaisala HMDW2030, HMP130 User Manual

USER'S GUIDE

Calibration of Series HMD/W20/30 and

HMP130 Transmitters with

Vaisala HUMICAP® Indicator HMI41

U220EN11

PUBLISHED BY
Vaisala Oyj Phone (int.): [phone]

P.O. Box 26 Fax: [phone]
FIN-00421 Helsinki
Finland

Visit our Internet pages at http://www.vaisala.com/

© Vaisala 2006
No part of this manual may be reproduced in any form or by any means, electronic or

mechanical (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 the applicable supply contract or Conditions of
Sale.

HMI41 Calibration Option

19165ZZ-U220en-1.1 Operating Manual

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..................................................................................................................... 4

APPENDIX 1: QUICK REFERENCE GUIDE

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HMI41 Calibration Option
Operating Manual 19165ZZ-U220en-1.1

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HMI41 Calibration Option

19165ZZ-U220en-1.1 Operating Manual

1. INTRODUCTION

1.1 HMI41 with calibration option

The HMI41 can be used as a field calibrator for various Vaisala humidity
transmitters. There are three different calibration cables available:

• 19116ZZ for the calibration of Vaisala’s HMD/W 60/70 and

HMP140 series analogue transmitters

• 19164ZZ for the calibration of HMP230 series digital transmitters

• 19165ZZ for the calibration of the HMD/W 20/30 and

HMP130 series analogue transmitters

In this manual, only the calibration of HMD/W 20/30 and HMP130 series
analogue transmitters is dealt with. For other calibration 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 information
from the transmitter. These two values are then compared on the HMI41
display and the transmitter is adjusted with calibration potentiometers inside
the transmitter.

1.2 Selecting the 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

Td
T

P
setminmax hysthold LobatHi

%
°C °F

°C

°F

Pahg/m

Then release the ON/OFF button and within 1...2 seconds press both ENTER
and MODE buttons until the following text appears on the display:

After a few seconds, the text changes automatically to show the following:

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