Vaisala HUMICAP HMM100 User manual

USER'S GUIDE
Vaisala HUMICAP® Humidity Module
HMM100
M211024EN-B

PUBLISHED BY
Vaisala Oyj Phone (int.): [phone]
P.O. Box 26 Fax: [phone]
FI-00421 Helsinki
Finland
Visit our Internet pages at www.vaisala.com/
© Vaisala 2012
No part of this manual may be reproduced, published or publicly displayed in any form
or by any means, electronic or mechanical (including photocopying), nor may its
contents be modified, translated, adapted, sold or disclosed to a third party without prior
written permission of the copyright holder. Translated manuals and translated portions
of multilingual documents are based on the original English versions. In ambiguous
cases, the English versions are applicable, not the translations.
The contents of this manual are subject to change without prior notice.
This manual does not create any legally binding obligations for Vaisala towards
customers or end users. All legally binding obligations and agreements are included
exclusively in the applicable supply contract or the General Conditions of Sale and
General Conditions of Service of Vaisala.

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Table of Contents
CHAPTER 1
GENERAL INFORMATION............................................................................5
About This Manual...................................................................5
Contents of This Manual.......................................................5
Version Information...............................................................6
Related Manuals...................................................................6
Documentation Conventions.................................................6
Safety.........................................................................................7
ESD Protection......................................................................7
Recycling ..................................................................................7
Regulatory Compliances.........................................................8
Patent Notice ............................................................................8
Trademarks...............................................................................8
License Agreement..................................................................8
Warranty....................................................................................9
CHAPTER 2
PRODUCT OVERVIEW................................................................................11
Introduction to HMM100 Series Humidity Modules ............11
Basic Features and Options..................................................12
Probe Types............................................................................13
Filter Types .............................................................................14
Catalytic VHP Filter.............................................................15
Installation Accessories........................................................16
Probe Mounting Flange.......................................................16
Mounting Bracket with Lid...................................................17
Module Housing (IP65) .......................................................18
Probe Mounting Clamp .......................................................19
CHAPTER 3
INSTALLATION............................................................................................21
Dimensions.............................................................................21
Installing the Module..............................................................22
Installing the Probe................................................................23
Wiring ......................................................................................24
2-wire Output.......................................................................24
3-wire Output.......................................................................24
Verifying the Installation........................................................25
CHAPTER 4
OPERATION.................................................................................................27
Using the Service Port...........................................................27
Installing the Driver for the USB Cable ...............................27

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Terminal Application Settings..............................................28
List of Serial Commands .......................................................30
Device Information and Status..............................................31
Show Device Information ....................................................31
Show Quantities ..................................................................32
Show Calibration Info ..........................................................32
Show Analog Output Status................................................32
Show Firmware Version......................................................33
Serial Line Output Commands..............................................33
Start Measurement Output..................................................33
Stop Measurement Output..................................................33
Set Output Interval...............................................................34
Output a Reading Once.......................................................34
Calibration Commands..........................................................35
Calibrate Humidity Measurement........................................35
Calibrate Temperature Measurement .................................36
Calibrate Capacitance Measurement..................................37
View User Adjustment Parameters .....................................38
Set User Adjustment Parameters........................................38
Zero the Trimmers...............................................................39
Calibrate Analog Output......................................................39
Configuring Serial Line Operation........................................40
Set Serial Line Settings.......................................................40
Set Terminal Echo...............................................................40
Set Module Address............................................................41
Set Serial Interface Mode....................................................41
Configuring Measurement Parameters ................................42
Set Environmental Compensation Values...........................42
Set Temporary Pressure Compensation Value...................43
Configuring Analog Output...................................................44
Set Analog Output Mode.....................................................44
Select Analog Output Quantity and Scaling........................44
Test the Analog Output .......................................................45
Other Commands ...................................................................46
Display Command List ........................................................46
Enable Advanced Commands.............................................46
Display the Currently Active Errors .....................................46
Connecting to the Module in POLL Mode...........................47
Closing the Connection in POLL Mode...............................47
Save Changed Settings.......................................................47
Restore Saved Settings.......................................................48
Reset the Module ................................................................48
Restore Factory Settings.....................................................48
CHAPTER 5
MAINTENANCE............................................................................................49
Changing the Filter.................................................................49
Changing the Sensor .............................................................49
Calibration...............................................................................51
Calibration and Adjustment Using Trimmers......................52
Calibration and Adjustment Using Serial Line....................53
Humidity Calibration (RHCAL).............................................54
Temperature Calibration (CT) .............................................56
Capacitance Calibration (CRH)...........................................58

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CHAPTER 6
TROUBLESHOOTING .................................................................................61
Analog Output Error Notification..........................................61
Solving Typical Problems .....................................................62
Technical Support..................................................................63
Product Returns.....................................................................63
CHAPTER 7
TECHNICAL DATA......................................................................................65
Specifications.........................................................................65
Performance........................................................................65
Relative Humidity...........................................................65
Dewpoint Temperature ..................................................65
Operating Environment.......................................................66
Inputs and Outputs..............................................................66
Mechanics...........................................................................67
Options and Accessories......................................................68

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List of Figures
Figure 1 HMM100 Humidity Module with Probe.....................................12
Figure 2 Probe Types .............................................................................13
Figure 3 Filter Types...............................................................................14
Figure 4 Optional Probe Mounting Flange..............................................16
Figure 5 Mounting Bracket with Lid ........................................................17
Figure 6 Optional Module Housing.........................................................18
Figure 7 Aligning Mounting Clamp Slots.................................................19
Figure 8 Sliding the Lower Clamp Part...................................................19
Figure 9 Securing the Upper Clamp Part................................................20
Figure 10 Tightening the Lower Clamp Part.............................................20
Figure 11 HMM100 Dimensions...............................................................21
Figure 12 Component Board (3-wire version)...........................................22
Figure 13 Wiring for 2-wire Output............................................................24
Figure 14 Wiring for 3-wire Output............................................................24
Figure 15 PuTTY Terminal Application.....................................................29
Figure 16 Changing the Sensor................................................................50
Figure 17 Trimmers for Offset and Gain...................................................52
Figure 18 Loop Supply Voltage Versus Loop resistance..........................67
List of Tables
Table 1 Manual Revisions.......................................................................6
Table 2 Related Manuals.........................................................................6
Table 3 Quantities Measured by HMM100............................................11
Table 4 Filter Properties ........................................................................14
Table 5 HMM100 Default Serial Interface Setting.................................28
Table 6 Basic Serial Commands ...........................................................30
Table 7 Advanced Serial Commands....................................................31
Table 8 Error Levels for Analog Output Modes.....................................61
Table 9 Troubleshooting Table..............................................................62
Table 10 HMM100 3-wire Model Current Consumption..........................66

Chapter 1 ________________________________________________________ General Information
VAISALA________________________________________________________________________ 5
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 Vaisala HUMICAP®Humidity Module HMM100.
Contents of This Manual
This manual consists of the following chapters:
- Chapter 1, General Information, provides general notes for the manual
and the product.
- Chapter 2, Product Overview, introduces the features, advantages, and
the product nomenclature of the HMM100.
- Chapter 3, Installation, provides you with information that is intended
to help you install the HMM100.
- Chapter 4, Operation, contains information that is needed to operate
the HMM100.
- Chapter 5, Maintenance, provides information that is needed in basic
maintenance of the HMM100.
- Chapter 6, Troubleshooting, describes the analog output error
notification behavior, some common problems, their probable causes
and remedies, and provides contact information for technical support.
- Chapter 7, Technical Data, provides the technical data of the
HMM100.

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Version Information
Table 1 Manual Revisions
Manual Code Description
M211024EN-B October 2012. This manual. Added VHP filter
option and new pictures to the installation
instructions, edited commands and technical
specifications.
M211024EN-A Previous version.
Related Manuals
Table 2 Related Manuals
Manual Code Manual Name
M211002EN HMM100 Quick Reference Guide
M211078EN Module Housing for Humidity Module HMM10
Quick Reference Guide
M211079EN Mounting Bracket for Humidity Module HMM10
Quick Reference Guide
M211080EN Mounting Flange for Humidity Probes
Quick Reference Guide
Documentation Conventions
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.

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Safety
The HMM100 module delivered to you has been tested for safety and
approved as shipped from the factory. Note the following precautions:
WARNING Ground the product, and verify installation grounding periodically to
minimize shock hazard.
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
ESD for their intended use. However, it is possible to damage the product
by delivering electrostatic discharges when touching exposed
components.
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.

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Regulatory Compliances
The HMM100 is in conformity with the provisions of the following EU
directive(s):
- RoHS Directive
- WEEE Directive
The electromagnetic compatibility of the HMM100 has been tested
according to the following product family standard:
EN61326-1 Electrical equipment for measurement, control and
laboratory use - EMC requirements - for use in light industrial
environments.
The Electrostatic Discharge test (EN 61000-4-2) was not applied to the
open frame module. In the final product the module PC-board should be
installed in a user restricted location / enclosure for continued ESD
protection.
Patent Notice
The HMM100 is protected by the following patents and patent
applications and their corresponding national rights:
Finnish patent 98861, French patent 6650303, German patent 69418174,
Japanese patent 3585973, UK patent 0665303, U.S. patent 5607564.
Trademarks
Vaisala HUMICAP® is a registered trademark of Vaisala Oyj.
Windows® is a registered trademark of Microsoft Corporation in the
United States and/or other countries.
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.

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VAISALA________________________________________________________________________ 9
Warranty
Visit our Internet pages for standard warranty terms and conditions:
www.vaisala.com/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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Chapter 2 __________________________________________________________ Product Overview
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CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the features, advantages, and the product
nomenclature of the HMM100.
Introduction to HMM100 Series Humidity
Modules
The HMM100 series humidity measurement modules are open frame
modules intended for integration into environmental chambers and other
chambers where high temperature tolerance is important. The modules
provide a single analog output channel for relative humidity (RH) or
dewpoint (Td). Dewpoint is the recommended quantity if the
measurement environment has significant temperature differences.
Table 3 Quantities Measured by HMM100
Quantity Range
Relative humidity (RH) 0 ... 100%
Dewpoint (Td) -20 ... +100 ºC (-4 ... +212 ºF)
All HMM100 modules include automatic temperature compensation
across the operating temperature range using an integrated PT1000
sensor. No external temperature compensation should be applied to the
output.
HMM100 modules do not incorporate probe heating or chemical purge
functionality. If the measurement environment is prone to condensation,
or likely to cause chemical contamination of the sensor, other Vaisala
instruments may be more suitable to the application.
The cable and probe of the HMM100 are attached at the factory. They
should remain connected to the module at all times; do not cut and re-
connect the cable.

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0905-042
Figure 1 HMM100 Humidity Module with Probe
Basic Features and Options
- Vaisala HUMICAP®180R humidity sensor
- Plastic or stainless steel probe
- Analog output options:
- 4 ... 20 mA loop powered (2-wire output model)
- 0 ... 20 mA or 0 ... 1 / 5 / 10 V (3-wire output model,
user-configurable using service port)
- Cable lengths:
- 0.65 m, 1.55 m, or 2.9 m for plastic probe
- 1.55 m or 2.9 m for stainless steel probe
- Various filter types: see section Filter Types on page 14
- Optional installation accessories:
- Probe mounting flange
- Probe mounting clamp
- Mounting bracket with lid
- Module housing (IP65)
- Service port for maintenance
- Optional USB cable for easy access

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Probe Types
The HMM100 can be ordered with a plastic or stainless steel probe. The
plastic probe is suitable for most applications.
Both probe types have the same operational temperature range. Note that
the operational temperature range is also affected by the filter; see section
Filter Types on page 14.
Figure 2 below shows the plastic probe with a membrane filter (top), and
the stainless steel probe with a sintered stainless steel filter (bottom).
0909-021
Figure 2 Probe Types

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Filter Types
The available filters for HMM100 are shown in Figure 3 below. All
filters are 12 mm in diameter, and can be used in both the plastic and
stainless steel probe. Note the operational temperature range of each
filter.
For order codes, see section Options and Accessories on page 68.
1204-001
Figure 3 Filter Types
Table 4 Filter Properties
No. Filter Diameter Pore Size Temperature Range
1 Plastic grid filter
(fastest response time) 12 mm - -20 ... +80 ºC (-4 ... +176 ºF)
2 Membrane filter 12 mm 0.2 µm -20 ... +80 ºC
(-4 ... +176 ºF)
3 Porous PTFE filter
(general purpose) 12 mm 8 µm -70 ... +180 ºC (-94 ... +356 ºF)
4 Stainless steel
sintered filter 12 mm 38 µm -70 ... +180 ºC (-94 ... +356 ºF)
5 Catalytic VHP filter
(VHP applications) 12 mm 38 µm -70 ... +180 ºC (-94 ... +356 ºF)
The catalytic VPH filter is recommended for environments where
vaporized hydgoren peroxide (VHP) is used. It is mechanically similar to
the stainless steel sintered filter, but it can be identified by the line that
has been machined to its base; see Figure 3 above. For more
information, see section Catalytic VHP Filter on page 15.

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Catalytic VHP Filter
Vaporized hydrogen peroxide (VHP) is a gaseous form of hydrogen
peroxide that is commonly used in decontamination and sterilization of
environmental chambers. Hydrogen peroxide has relatively low
saturation pressure which increases the possibility of saturation when
used in humid conditions. When saturation conditions occur, liquid
hydrogen peroxide will form on surfaces in the decontaminated space.
Vaisala HUMICAP® sensor is compatible with direct VHP exposure
even at high concentrations and hundreds of VHP cycles up to saturation.
The long term performance is very good at concentrations higher than
typically used for sterilization. However, for the applications where full
saturation is possible, Vaisala recommends using the catalytic VHP filter
to protect the sensor and extend the calibration interval.
The catalytic filter is based on a generally known method where the H2O2
is split to H2O and O2. This reaction is produced by the catalyst layer that
has been applied to the filter. As the filter prevents the VHP from
reaching the humidity sensor, the sensor responds to humidity only. The
catalytic filter affects the reading approximately +1 %RH at 300 pmm
VHP, or +3 %RH at 900 ppm VHP (at 23 °C / 73.4 °F).

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Installation Accessories
For order codes of the installation accessories, see section Options and
Accessories on page 68.
Probe Mounting Flange
The probe mounting flange is used to seal the cable pass-through in the
chamber wall. The flange can also be used to hold the probe itself, in
case the probe cannot be mouted on the chamber wall otherwise. This
mounting is not ideal since leaving the probe cable completely outside
the measurement environment may cause heat conduction that affects the
measurement.
0911-109
Figure 4 Optional Probe Mounting Flange

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Mounting Bracket with Lid
The optional mounting bracket includes a metal backplate and a plastic
lid for the component board. The bracket does not provide IP rated
protection. The bracket can be installed on a DIN rail.
0911-105
Figure 5 Mounting Bracket with Lid

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Module Housing (IP65)
The optional module housing is an IP65 rated housing. The module is
installed inside the housing in a mounting bracket (provided with the
housing). The housing has two cable glands. A coaxial plug is provided
for sealing the gland for the probe cable.
0911-096
Figure 6 Optional Module Housing