Vaisala HUMICAP HMM170 User manual

M212259EN-A
User Guide
Vaisala HUMICAPâHumidity and Temperature
Module
HMM170

PUBLISHED BY
Vaisala Oyj
Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
P.O. Box 26, FI-00421 Helsinki, Finland
[phone]
Visit our Internet pages at www.vaisala.com.
© Vaisala Oyj 2019
No part of this document may be
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based on the original English versions. In
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applicable, not the translations.
The contents of this document are subject
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Vaisala makes no representations on this
document’s compliance with the local
rules and regulations applicable at any
given time, and hereby disclaims any and
all responsibilities related thereto.
This document 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.
This product contains software developed
by Vaisala or third parties. Use of the
software is governed by license terms and
conditions included in the applicable
supply contract or, in the absence of
separate license terms and conditions, by
the General License Conditions of Vaisala
Group.

Table of Contents
1. About This Document................................................................................... 5
1.1 Version Information.......................................................................................... 5
1.2 Related Manuals................................................................................................ 5
1.3 Documentation Conventions...........................................................................5
1.4 Trademarks........................................................................................................ 6
2. Product Overview........................................................................................... 7
2.1 Introduction to HMM170...................................................................................7
2.2 Basic Features and Options............................................................................. 7
2.3 Sensor Types..................................................................................................... 8
2.4 Output Parameters........................................................................................... 9
2.5 Probe Head...................................................................................................... 10
2.6 Chemical Purge............................................................................................... 10
2.7 Filter Types........................................................................................................ 11
2.8 LED Indicator.....................................................................................................11
2.9 Safety................................................................................................................ 12
2.9.1 ESD Protection..........................................................................................12
2.10 Regulatory Compliances.................................................................................13
3. Installation........................................................................................................14
3.1 Installing Module............................................................................................. 14
3.2 Installing Probe................................................................................................ 15
3.3 Vaisala Insight Software................................................................................. 16
3.3.1 Connecting to Insight Software..............................................................16
3.3.2 Configuration Options............................................................................. 16
4. Operation.......................................................................................................... 18
4.1 Using Service Port........................................................................................... 18
4.1.1 Installing the Driver for the USB Service Cable.................................... 18
4.2 Modbus............................................................................................................. 19
4.3 Operating with MI70 Indicator.......................................................................19
4.3.1 MI70 Indicator Parts............................................................................... 20
4.3.2 Connecting HMM170 to MI70 Indicator................................................ 20
4.3.3 Basic Display............................................................................................. 21
4.3.4 Graphical Display......................................................................................21
4.3.5 Main Menu................................................................................................ 22
4.3.6 Holding and Saving the Display.............................................................22
4.3.7 Recording Data........................................................................................23
5. Maintenance....................................................................................................24
5.1 Cleaning Probe............................................................................................... 24
5.2 Replacing Filter...............................................................................................24
5.3 Calibration and Adjustment.......................................................................... 25
5.3.1 Adjustment Points and Requirements..................................................26
5.3.2 Adjusting Measurement with Insight Software................................... 26
5.3.3 Calibration and Adjustment Using MI70...............................................27
Table of Contents
1

6. Technical Data................................................................................................29
6.1 HMM170 Specifications.................................................................................. 29
6.2 Spare Parts and Accessories......................................................................... 32
Appendix A: Modbus Reference................................................................. 33
A.1 Default Communication Settings................................................................. 33
A.2 Function Codes...............................................................................................33
A.3 Data Encoding.................................................................................................33
A.3.1 32-Bit Floating Point or Integer Format...............................................34
A.3.2 16-Bit Integer Format............................................................................. 34
A.4 Modbus Registers...........................................................................................34
A.4.1 Measurement Data Registers.................................................................35
A.4.2 Configuration Registers..........................................................................37
A.4.3 Device Identification Objects..................................................................41
A.4.4 Test Value Registers.................................................................................41
A.4.5 Modbus Communication Examples...................................................... 42
Warranty............................................................................................................45
Technical Support........................................................................................... 45
Recycling...........................................................................................................45
HMM170 User Guide M212259EN-A
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List of Figures
Figure 1 HMM170 Probe Head Dimensions................................................................ 10
Figure 2 HMM170 Component Board...........................................................................14
Figure 3 HMM170 Probe Installation.............................................................................15
Figure 4 Connecting Module to Insight.......................................................................16
Figure 5 MI70 Indicator Parts........................................................................................20
Figure 6 MI70 Basic Display............................................................................................21
Figure 7 Recording/Viewing Menu.............................................................................. 23
Figure 8 Accuracy over Temperature Range in Temperature Measurement... 30
Figure 9 Probe Head Dimensions..................................................................................31
Figure 10 Component Board Dimensions..................................................................... 31
List of Figures
3

List of Tables
Table 1 Document Versions (in English).......................................................................5
Table 2 Related Manuals....................................................................................................5
Table 3 HMM170 Sensor Types.........................................................................................8
Table 4 Availability of Output Parameters................................................................... 9
Table 5 Filter Types and Properties............................................................................... 11
Table 6 LED Indicator States...........................................................................................12
Table 7 Measurement Performance.............................................................................29
Table 8 Operating Environment................................................................................... 30
Table 9 Inputs and Outputs........................................................................................... 30
Table 10 Spare Parts and Accessories...........................................................................32
Table 11 Default Modbus Serial Communication Settings.......................................33
Table 12 Modbus Function Codes...................................................................................33
Table 13 16-bit Signed Integer Format Details........................................................... 34
Table 14 Modbus Measurement Data Registers (Read-Only).................................35
Table 15 Modbus Configuration Data Registers (Writable).....................................37
Table 16 Device Identification Objects.......................................................................... 41
Table 17 Modbus Test Registers (Read-Only)..............................................................41
HMM170 User Guide M212259EN-A
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1. About This Document
1.1 Version Information
This document provides instructions for installing, operating, and maintaining Vaisala
HUMICAPâHumidity and Temperature Module HMM170.
Table 1 Document Versions (in English)
Document Code Date Description
M212259EN-A June 2019 First version.
1.2 Related Manuals
Table 2 Related Manuals
Document Code Name
M212260EN HMM170 Quick Guide
1.3 Documentation Conventions
Warning alerts you to a serious hazard. If you do not read and
follow instructions carefully at this point, there is a risk of injury or even death.
WARNING!
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.
CAUTION!
Note highlights important information on using the product.
Tip gives information for using the product more eciently.
Chapter 1 – About This Document
5

Lists tools needed to perform the task.
Indicates that you need to take some notes during the task.
1.4 Trademarks
Vaisalaâand HUMICAPâare registered trademarks of Vaisala Oyj.
All other product or company names that may be mentioned in this publication are trade
names, trademarks, or registered trademarks of their respective owners.
HMM170 User Guide M212259EN-A
6

2. Product Overview
2.1 Introduction to HMM170
Vaisala HUMICAPâHumidity and Temperature Module HMM170 is an open frame OEM module
for integration into demanding environmental chambers and harsh conditions. The module
provides a digital RS-485/Modbus RTU output and three freely configurable analog output
channels. The module provides relative humidity, temperature, dew point, and other calculated
parameters.
HMM170 probe covers the full temperature range -70 ... +180 °C (-94 ... +356 °F) used in
climate chambers and the whole humidity range up to condensation. The small probe and
compact component board oer easy and flexible installation. The probe cable options (2, 5,
or 10 m (6.5, 16.4, or 32.8 ft)) oer excellent cost optimization and flexibility to any OEM
application. By ordering HMM170 with the appropriate sensor, you can use the module in
environments that are frequently sterilized with vaporized hydrogen peroxide (H2O2) or to
measure humidity in oil medium, for example, for transformer and engine monitoring
applications.
The latest general purpose HUMICAPâR2 sensor has an improved corrosion resistance. The
sensor can tolerate typical chemicals, such as cleaning agents used in climate chambers. The
automatic sensor chemical purge function keeps the sensor clean from typical chemical fumes
and the additional probe warming function prevents condensation. In case HMM170 gets in
contact with water, the automatic heating rapidly dries the sensor to enable fast and accurate
humidity measurement.
HMM170 is easy to install and convenient to use. It provides both digital and analog outputs for
multiple needs. An integrated service port enables a quick and simple way to configure, check,
and calibrate the module with the help of a USB cable and Vaisala Insight software.
2.2 Basic Features and Options
• Three humidity sensor types:
• Vaisala HUMICAPâR2C (general use)
• Vaisala HUMICAPâ180VC (for H2O2use)
• Vaisala HUMICAPâ180L2 (for moisture in oil)
• Sensor purge provides superior chemical resistance
• Probe and sensor warming functions minimize condensation on probe
• Analog output options:
• 0/4 ... 20 mA
• 0/1 ... 5 V
• 0 ... 5/10 V
• Probe cable lengths:
• 2, 5, or 10 m (6.5, 16.4, or 32.8 ft)
• Various filter types
Chapter 2 – Product Overview
7

• Service port for maintenance
• Supports Vaisala MI70 Handheld Measurement Indicator
• Optional USB cable for easy connection to Vaisala Insight software for configuration,
diagnostics, and temporary online monitoring
2.3 Sensor Types
HMM170 is available with three dierent sensor types.
Table 3 HMM170 Sensor Types
Sensor Type Description
HUMICAPâR2C A general purpose industrial humidity sensor with high humidity
durability, good long term stability, and good tolerance against
chemical exposure.
HUMICAPâ180L2 A sensor that is optimized for measurement of humidity in oil
medium. It has good tolerance against chemicals and moderate
humidity durability.
The HUMICAPâ180L2 sensor measures moisture in oil in terms
of the water activity (aw) and temperature (T). Water activity
indicates directly whether there is a risk of free water formation.
The measurement is also independent of oil type and age. In
addition to water activity, the HMM170 can output ppm, the
average mass concentration of water in oil.
The HUMICAPâ180L2 sensor does not support probe heating or
chemical purge.
HUMICAPâ180VC A composite humidity sensor with catalytic surface for use in
applications where the sensor is exposed to H2O2(hydrogen
peroxide).
Catalytic HUMICAPâ180VC sensor is a good choice when you
want to measure RH between bio-decontamination cycles and
you are not interested in saturation level of the air mixture during
the bio-decontamination phase. Catalytic layer protects the
sensor during the bio-decontamination phase. Catalytic layer
catalyzes H2O2into water vapor and oxygen. Therefore, the
sensing polymer detects only water vapor and shows correct
Relative Humidity value.
HMM170 User Guide M212259EN-A
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