Vaisala HUMICAP HMT100 User manual

USER'S GUIDE
Vaisala HUMICAP
®
Humidity and
Temperature Transmitter Series
HMT100
M210701EN-D

PUBLISHED BY
Vaisala Oyj Phone (int.): [phone]
P.O. Box 26 Fax: [phone]
FI-00421 Helsinki
Finland
Visit our Internet pages at http://www.vaisala.com/
© Vaisala 2009
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.

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Table of Contents
CHAPTER 1
GENERAL INFORMATION............................................................................6
About This Manual...................................................................6
Version Information...............................................................6
Related Manuals...................................................................6
General Safety Considerations.............................................7
Feedback...............................................................................7
Product Related Safety Precautions......................................7
ESD Protection .........................................................................7
Recycling ..................................................................................8
Patent Notice ............................................................................8
Trademarks...............................................................................9
License Agreement..................................................................9
Warranty....................................................................................9
CHAPTER 2
PRODUCT OVERVIEW................................................................................11
Introduction to the HMT100 Humidity and Temperature
Transmitter..............................................................................11
Fixed and Remote Probe Models .......................................12
Optional Display..................................................................12
HMT100 Transmitter Components......................................12
CHAPTER 3
INSTALLATION............................................................................................15
Mounting .................................................................................15
Wall Mounting .....................................................................15
With Plastic Wall Assembly Plate (Provided).................15
With Optional Aluminum Wall Installation Plate.............16
Installation with Rain Shield................................................17
Installation with Radiation Shield ........................................18
Duct Installation Kit .............................................................19
Probe Assembly with Duct Installation Kit .....................20
Drilling Instructions for Duct Installation Kit ...................21
Connections............................................................................22
CHAPTER 4
MAINTENANCE ...........................................................................................25
Replacing the HUMICAP®Sensor.........................................25
Fixed Probe Model..............................................................25
Remote Probe Model..........................................................25
Removing and Fastening the Probe.....................................26
Fixed Probe Model..............................................................26
Remote Probe Model..........................................................27

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Calibration and Adjustment...................................................28
Relative Humidity Adjustment Using Push Buttons.............28
Adjustment with HM70 ........................................................29
Field Checking and Adjustment Using a Calibrated
Reference Probe............................................................30
One-Point Adjustment Using a Calibrator......................31
Two-Point Adjustment Using a Calibrator......................32
LiCl-NaCl Adjustment.....................................................32
Temperature Field Check and Adjustment by Using a
Calibrated Reference Probe...........................................33
Adjustment with HMI41 .......................................................34
Connections and Selecting the Calibrator Function.......35
Offset and Gain Adjustments .........................................36
HMI41 as a Reference Meter....................................36
HMI41 as a Terminal.................................................37
Troubleshooting..............................................................39
Analog Output Tests ..............................................................40
CHAPTER 5
TROUBLESHOOTING..................................................................................41
Error Mode...............................................................................41
Current Output.....................................................................41
Voltage Output.....................................................................41
Technical Support ..................................................................41
Return Instructions ................................................................42
Vaisala Service Centers.........................................................43
CHAPTER 6
TECHNICAL DATA ......................................................................................45
Specifications .........................................................................45
Dimensions in mm (inches)...................................................49

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List of Figures
Figure 1 HMT100 Components..............................................................13
Figure 2 Plastic Wall Assembly Plate (Spare Part No. GM45160).........15
Figure 3 Plastic Wall Assembly Plate with Aluminum Installation Plate.16
Figure 4 Installation with Rain Shield (Spare Part No. 215109).............17
Figure 5 Installation of the Humidity Probe with the Radiation Shield....18
Figure 6 Probe Installation with the Duct Installation Kit........................19
Figure 7 Assembly of the Humidity Probe with the Duct Installation Kit.20
Figure 8 Drilling Instructions...................................................................21
Figure 9 HMT100 Connection Board......................................................22
Figure 10 (1) Isolated Current-Loop Wiring, (2) Voltage Output Wiring...23
Figure 11 Removing the Humidity Probe (Fixed Probe Model)................26
Figure 12 Removing the Humidity Probe (Remote Probe Model)............27
Figure 13 Adjustment Buttons..................................................................28
Figure 14 Location of the MI70 Probe and Cable Connector Ports .........29
Figure 15 Example of the MI70 Adjustment Menu...................................31
Figure 16 Example of the MI70 Adjustment Mode Graph Display...........31
Figure 17 Location of the HMI41 Calibration Connector..........................34
Figure 18 Accuracy of Temperature Measurement..................................46
Figure 19 Dimensions HMT100 Fixed Probe Model ................................49
Figure 20 Dimensions HMT100 Remote Probe Model.............................50
List of Tables
Table 1 Manual Revisions.......................................................................6
Table 2 Related Manuals ........................................................................6
Table 3 Wiring Table.............................................................................23
Table 4 Common Problems During Adjustment and Their Remedies..39
Table 5 Relative Humidity Measurement Specifications.......................45
Table 6 Temperature Measurement Specifications ..............................45
Table 7 Dewpoint Temperature (Calculated) Measurement
Specifications...........................................................................46
Table 8 Accuracy of Dewpoint Temperature Measurement..................46
Table 9 Operating Environment Specifications.....................................46
Table 10 Inputs and Outputs...................................................................47
Table 11 Mechanics Specifications.........................................................47
Table 12 Options and Accessories..........................................................48

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CHAPTER 1
GENERAL INFORMATION
This chapter provides general notes for the manual and the product.
About This Manual
This manual provides information for installing, operating, and
maintaining the Humidity and Temperature Transmitter HMT100.
Version Information
Table 1 Manual Revisions
Manual Code Description
M210701EN-A June 2005 - First version
M210701EN-B April 2006 - Corrected Wiring table (Table 3)
M210701EN-C May 2007 - Updated Product Overview,
Figure 9, and duct installation kit order code.
Corrected calibration instructions in the
Maintenance chapter.
M210701EN-D June 2009 - Added spare part numbers of
installation accessories to installation instructions.
Updated calibration and adjustment instructions.
Related Manuals
Table 2 Related Manuals
Manual Code Manual Name
M210185EN-B Humidity Calibrator HMK15 User's Guide
M210297EN-C Hand-held Humidity and Temperature Meter
HM70 User's Guide
M210316EN-A HMI41 Indicator and HMP41/45/46 Probes
Operating Manual

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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 even
death.
CAUTION Caution warns you of a potential hazard. If you do not read and follow
instructions carefully at this point, the product could be damaged or
important data could be lost.
NOTE Note highlights important information on using the product.
Feedback
Vaisala Customer Documentation Team welcomes your comments and
suggestions on the quality and usefulness of this publication. If you find
errors or have other suggestions for improvement, please indicate the
chapter, section, and page number. You can send comments to us by e-
mail: [email protected]
Product Related Safety Precautions
The Humidity and Temperature Transmitter HMT100 delivered to you
has been tested for safety and approved as shipped from the factory. Note
the following precautions:
CAUTION Do not modify the unit. Improper modification can damage the product
or lead to malfunction.
ESD Protection
Electrostatic Discharge (ESD) can cause immediate or latent damage to
electronic circuits. Vaisala products are adequately protected against

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ESD for their intended use. However, it is possible to damage the product
by delivering electrostatic discharges when touching, removing, or
inserting any objects inside the equipment housing.
To make sure you are not delivering high static voltages yourself:
- Handle ESD sensitive components on a properly grounded and
protected ESD workbench. When this is not possible, ground yourself
to the equipment chassis before touching the boards. Ground yourself
with a wrist strap and a resistive connection cord. When neither of the
above is possible, touch a conductive part of the equipment chassis
with your other hand before touching the boards.
- Always hold the boards by the edges and avoid touching the
component contacts.
Recycling
Recycle all applicable material.
Dispose of batteries and the unit according to statutory regulations. Do
not dispose of with regular household refuse.
Patent Notice
The HMT100 is protected by the following patents and their
corresponding national rights:
Finnish patent 98861, French patent 6650303, German patent 69418174,
Japanese patent 3585973, UK patent 0665303, U.S. patent 5607564.

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Trademarks
HUMICAPis a registered trademark of Vaisala Oyj.
License Agreement
All rights to any software are held by Vaisala or third parties. The
customer is allowed to use the software only to the extent that is provided
by the applicable supply contract or Software License Agreement.
Warranty
For certain products Vaisala normally gives a limited one-year warranty.
Please observe that any such warranty may not be valid in case of
damage due to normal wear and tear, exceptional operating conditions,
negligent handling or installation, or unauthorized modifications. Please
see the applicable supply contract or Conditions of Sale for details of the
warranty for each product

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