Vaisala HMM170 User manual

Vaisala HMM170 User manual

M212259EN-B

User Guide

Vaisala HUMICAP

â

Humidity and Temperature Module

HMM170

PUBLISHED BY Vaisala Oyj Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland P.O. Box 26, FI-00421 Helsinki, Finland +358 9 8949 1 Visit our Internet pages at www.vaisala.com

.

© Vaisala Oyj 2019 No part of this document 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 documents 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 document are subject to change without prior notice.

Local rules and regulations may vary and they shall take precedence over the information contained in this document.

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

Table of Contents

1.

1.1

1.2

1.3

1.4

About This Document ................................................................................... 5 Version Information .......................................................................................... 5 Related Manuals ................................................................................................ 5 Documentation Conventions ...........................................................................5

Trademarks ........................................................................................................ 6

2.

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.9.1

2.10

Product Overview ........................................................................................... 7 Introduction to HMM170 ...................................................................................7

Basic Features and Options ............................................................................. 7

Sensor Types ..................................................................................................... 8

Output Parameters ........................................................................................... 9

Probe Head ...................................................................................................... 10

Chemical Purge .................................................................................................11

Filter Types ........................................................................................................ 11

LED Indicator ....................................................................................................12

Safety ................................................................................................................ 12 ESD Protection ..........................................................................................12

Regulatory Compliances .................................................................................13

3.

3.1

3.2

3.3

3.3.1

3.3.2

Installation ........................................................................................................14

Installing Module ............................................................................................. 14

Installing Probe ................................................................................................ 15

Vaisala Insight Software ................................................................................. 16 Connecting to Insight Software ..............................................................16

Configuration Options ............................................................................. 16

4.

4.1

4.1.1

4.2

Operation .......................................................................................................... 18 Using Service Port ........................................................................................... 18 Installing the Driver for the USB Service Cable .................................... 18

Modbus ............................................................................................................. 19

5.

5.1

5.2

5.3

5.3.1

5.3.2

Maintenance ....................................................................................................20

Cleaning Probe ............................................................................................... 20 Replacing Filter .............................................................................................. 20

Calibration and Adjustment ........................................................................... 21

Adjustment Points and Requirements ..................................................22

Adjusting Measurement with Insight Software ................................... 22

6.

6.1

6.2

Technical Data ................................................................................................24

HMM170 Specifications .................................................................................. 24

Accessories and Spare Parts ......................................................................... 27

Appendix A: Modbus Reference................................................................. 28 A.1

Default Communication Settings ................................................................. 28 A.2

Function Codes ...............................................................................................28

1

HMM170 User Guide

A.3

A.3.1

A.3.2

A.4

A.4.1

A.4.2

A.4.3

A.4.4

A.4.5

Data Encoding .................................................................................................28

32-Bit Floating Point or Integer Format ...............................................29

16-Bit Integer Format ..............................................................................29

Modbus Registers ...........................................................................................29

Measurement Data Registers ................................................................ 30

Configuration Registers ..........................................................................32

Device Identification Objects .................................................................36

Test Value Registers ................................................................................36

Modbus Communication Examples .......................................................37

Warranty.............................................................................................................41

Technical Support............................................................................................ 41 Recycling............................................................................................................41

M212259EN-B 2

List of Figures

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6 Figure 7

HMM170 Probe Head Dimensions..................................................................10

HMM170 Component Board.............................................................................14

HMM170 Probe Installation...............................................................................15

Connecting Module to Insight.........................................................................16

Temperature Measurement Accuracy over Temperature Range..........25

Probe Head Dimensions.................................................................................. 26 Component Board Dimensions......................................................................26

List of Figures 3

HMM170 User Guide

List of Tables

Table 1 Table 2

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8 Table 9

Table 10 Table 11

Table 12 Table 13

Table 14

Table 15

Table 16

Table 17 Table 18

Document Versions (in English).......................................................................5

Related Manuals....................................................................................................5

HMM170 Sensor Types.........................................................................................8

Availability of Output Parameters................................................................... 9

Filter Types and Properties............................................................................... 11

LED Indicator States...........................................................................................12

Measurement Performance.............................................................................24

Operating Environment....................................................................................25

Inputs and Outputs............................................................................................25

Accessories.......................................................................................................... 27 Spare Parts...........................................................................................................27

Default Modbus Serial Communication Settings...................................... 28 Modbus Function Codes.................................................................................. 28

16-bit Signed Integer Format Details........................................................... 29

Modbus Measurement Data Registers (Read-Only)................................ 30

Modbus Configuration Data Registers (Writable).................................... 32

Device Identification Objects..........................................................................36

Modbus Test Registers (Read-Only).............................................................36

M212259EN-B 4

Chapter 1 – About This Document

1. About This Document 1.1 Version Information

This document provides instructions for installing, operating, and maintaining Vaisala HUMICAP â Humidity and Temperature Module HMM170.

Table 1 Document Versions (in English)

Document Code

M212259EN-B M212259EN-A

Date

October 2019 June 2019

Description

This version. Updated section MI70 handheld indicator.

Output Parameters (page 9) .

Updated technical specification. Removed content related to First version.

1.2 Related Manuals

Table 2 Related Manuals

Document Code

M212260EN M210185EN

Name

HMM170 Quick Guide HMK15 User guide

1.3 Documentation Conventions

WARNING!

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.

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

highlights important information on using the product.

5

6 HMM170 User Guide

Tip

gives information for using the product more efficiently.

M212259EN-B Lists tools needed to perform the task.

Indicates that you need to take some notes during the task.

1.4 Trademarks

Vaisala â and HUMICAP â are 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.

Chapter 2 – Product Overview

2. Product Overview 2.1 Introduction to HMM170

Vaisala HUMICAP parameters.

â Humidity 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 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 offer easy and flexible installation. The probe cable options (2, 5, or 10 m (6.5, 16.4, or 32.8 ft)) offer 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 (H 2 O 2 ) or to measure humidity in oil medium, for example, for transformer and engine monitoring applications.

The latest general purpose HUMICAP humidity measurement.

â R2 sensor has 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 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 PC software.

2.2 Basic Features and Options

• Three humidity sensor types: • Vaisala HUMICAP â R2C (general use) • Vaisala HUMICAP â 180VC (for H 2 O 2 use) • Vaisala HUMICAP • 0/4 ... 20 mA • 0/1 ... 5 V • 0 ... 5/10 V • Probe cable lengths: • Various filter types â 180L2 (for moisture in oil) • Sensor purge provides superior chemical resistance • Probe and sensor warming functions minimize condensation on probe • Analog output options: • 2, 5, or 10 m (6.5, 16.4, or 32.8 ft) 7

8 HMM170 User Guide M212259EN-B • Service port for maintenance • 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 different sensor types.

Table 3 HMM170 Sensor Types

Sensor Type

HUMICAP â R2C HUMICAP HUMICAP â â 180L2 180VC

Description

A general purpose industrial humidity sensor with high humidity durability, good long term stability, and good tolerance against chemical exposure.

A sensor that is optimized for measurement of humidity in oil medium. It has good tolerance against chemicals and moderate humidity durability.

HUMICAP â 180L2 sensor measures moisture in oil in terms of the water activity (a w ) 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, HMM170 can output ppm, the average mass concentration of water in oil.

HUMICAP â 180L2 sensor does not support probe heating or chemical purge.

A composite humidity sensor with catalytic surface for use in applications where the sensor is exposed to H 2 O 2 (hydrogen peroxide).

Catalytic HUMICAP catalyzes H 2 O 2 â 180VC 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 into water vapor and oxygen. Therefore, the sensing polymer detects only water vapor and shows correct Relative Humidity value.

Chapter 2 – Product Overview

2.4 Output Parameters

Output parameter is available Output parameter is unavailable unless real temperature is written to Modbus register 0334 hex from an external source Output parameter is locked (value stays at latest valid reading) until measurement is possible again Output parameter is not valid for sensor type Table 4 Availability of Output Parameters

Output Parameter Output Range HUMICAP

â

R2C and 180VC Sensor Normal Operation During Heating During Purge HUMICAP

â

180L2 Sensor

Relative humidity Temperature 0 … 100 %RH −70 … +180 °C Dew point temperature −80 … +100 °C Dew/frost point temperature −80 … +100 °C Dew/frost point temperature at 1 atm −80 … +100 °C Dew point temperature at 1 atm Absolute humidity −80 … +100 °C 0 … 600 g/m 3 Mixing ratio 0 … 500 g/kg Wet-bulb temperature 0 … +100 °C Water concentration Water vapor pressure 0 … 10 6 ppm 0 … 1000 hPa Water vapor saturation pressure Enthalpy Water activity Dew point temperature difference Absolute humidity at NTP 0 … 1000 hPa −40 … 1500 kJ/kg 0 … 1 −10 … +50 °C 0 … 600 g/m 3 Water concentration in oil 0 … 10 6 ppm 9

HMM170 User Guide M212259EN-B

Output Parameter Output Range HUMICAP

â

R2C and 180VC Sensor HUMICAP

â

180L2 Sensor

Relative saturation Water mass fraction 0 … 100 %RS 0 … 10 6 ppm w

2.5 Probe Head

99.5 [3.92] 79.5 [3.13] 37.5 [1.48] Ø 5 [0.2] Ø 12 [0.47] Figure 1 HMM170 Probe Head Dimensions Groove for lock ring Ø 12 [0.47] mm [in] HMM170 is designed for applications that involve constant high humidity or rapid changes in humidity, such as drying and test chambers, combustion air, and other humidifiers and meteorological measurements, where measurement performance and chemical tolerance are essential.

• Temperature measurement range −70 ... +180 °C (−94 ... +356 °F) • Operating temperature range for probe −70 ... +180 °C (−94 ... +356 °F) • Probe and sensor warming functions minimize condensation on probe • Vapor and pressure proof construction • Stainless steel mesh filter standard in delivery

Probe Heating

HMM170 supports probe heating. Probe heating heats up not only the sensor, but the entire probe head. When probe temperature is heated above dew point temperature, condensation on the probe can be avoided while measuring the dew point temperature of the process.

Probe heating is normally disabled. If you select to enable probe heating, output parameters that are dependent on temperature measurement (such as relative humidity) are disabled, unless the true temperature of the measured environment is updated to the temperature compensation register of the probe from another measurement instrument. Output parameters that can be measured or calculated without this external temperature information (such as dew point temperature) are available even without the temperature input.

10

Chapter 2 – Product Overview

2.6 Chemical Purge

Chemical purge is a process where sensors are heated to remove possible contamination.

Purge is essential for long-term performance and accuracy of the probe. Purge takes up to 6 minutes to complete, during which time measurements are not available.

Depending on the selected sensor, the purge is automatically performed: • At probe start-up • At probe start-up and after every 24 hours HUMICAP â 180L2 sensor does not support chemical purge.

You can trigger a purge manually at any time with Vaisala Insight software or Modbus, or by closing the external purge trigger on the component board.

2.7 Filter Types

All filters available for HMM170 are 12 mm (0.47 in) in diameter. Note the operational temperature range of each filter.

Table 5 Filter Types and Properties

Filter Type Diameter

PPS plastic grid with stainless steel mesh 12 mm (0.47 in)

Pore Size

15 µm

Temperature Range

−70 ... +180 °C (−94 ... +356 °F) Stainless steel sintered 12 mm (0.47 in) 38 µm −70 ... +180 °C (−94 ... +356 °F) Stainless steel filter for moisture in oil 12 mm (0.47 in) Porous PTFE (general purpose) 12 mm (0.47 in) 3.15 mm 8 µm −70 ... +180 °C (−94 ... +356 °F) −70 ... +180 °C (−94 ... +356 °F)

More Information

Accessories and Spare Parts (page 27)

11

HMM170 User Guide M212259EN-B

2.8 LED Indicator

The LED indicator on the component board provides a visual indication of the status of HMM170. The alarm LED functionality is preset at the factory according to order form.

Table 6 LED Indicator States

LED Color

Not lit Green Green and blinking Red

Meaning

Module is powered off or LED functionality is disabled.

Module is powered on and ready for operation.

Module is powering up or communicating using Modbus.

Module is in error state.

You can use Vaisala Insight software to disable the LED indicator.

2.9 Safety

This product has been tested for safety. Note the following precautions: WARNING!

Ground the product and verify installation grounding periodically to minimize shock hazard.

CAUTION!

lifetime.

Do not modify the unit or use it in ways not described in the documentation. Improper modification may lead to safety hazards, equipment damage, failure to perform according to specification, or decreased equipment

2.9.1 ESD Protection

Electrostatic Discharge (ESD) can damage 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, removing, or inserting any objects in the equipment housing.

To avoid delivering high static voltages to the product: • Handle ESD-sensitive components on a properly grounded and protected ESD workbench or by grounding yourself to the equipment chassis with a wrist strap and a resistive connection cord.

12

Chapter 2 – Product Overview • If you are unable to take either precaution, touch a conductive part of the equipment chassis with your other hand before touching ESD-sensitive components.

• Hold component boards by the edges and avoid touching component contacts.

2.10 Regulatory Compliances

HMM170 is in conformity with the provisions of the following EU directive(s): • RoHS Directive • WEEE Directive Electromagnetic compatibility of HMM170 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.

13

HMM170 User Guide

3. Installation

M212259EN-B

3.1 Installing Module

The measurement probe with cable is attached to the component board at Vaisala. Do not disconnect and reconnect the cable.

1. Attach the module securely using the mounting holes on the corners of the component board. CAUTION!

The module is delivered with a set of standoffs. Use these or other applicable standoffs to attach the module to the minimum height of 6 mm (0.24 in).

2. Make sure that the module has a good earth connection from the plated mounting hole.

7

SERVICE

6

D+ D− GND

5 4

GND

4 5 6 7 Figure 2 HMM170 Component Board 1 2 3 Power input (12 ... 35 VDC) Active analog outputs (0/4 ... 20 mA, 1 ... 5 V, 0 ... 5/10 V) External purge trigger (closing activates purge) Grounding point LED Indicator Digital RS-485 (Modbus) port Service port (temporary connection, USB cable with Vaisala Insight Software)

+ VIN − + CH1 − + CH2 − + CH3 − PURGE

1 2 3 If you are replacing HMM100, the mounting holes in the gray area are compatible with HMM100.

14

Chapter 3 – Installation

3.2 Installing Probe

In humidity measurement and especially in calibration it is essential that the temperature of the probe and the measuring environment are the same. Even a small difference in temperature between the environment and the probe causes error in humidity measurement.

For example, if the temperature is +20 °C (68 °F) and the relative humidity 100 %RH, a difference of ±1 °C (±1.8 °F) between the environment and the probe causes an error of ±6 %RH.

Figure 3 HMM170 Probe Installation 1. Select the mounting location for the probe. • The probe should be entirely in the measurement environment, with sufficient distance to the outer walls of the chamber or duct. Air should flow freely around the probe.

• The probe location should represent well the environmental or process conditions, and it should be as clean as possible.

2. Remove the yellow protection cap from the probe.

3. Mount the probe head horizontally to prevent any water condensing on the probe head from running to the sensors.

4. Let the cable hang loosely to prevent condensed water from running along the cable to the probe head.

5. Seal the cable pass-through using Vaisala installation accessories.

If the temperature of the measured environment differs greatly from ambient temperature, the whole probe and preferably plenty of cable must be inside the process. This prevents measurement inaccuracy caused by heat conduction along the cable.

More Information

Accessories and Spare Parts (page 27)

15

HMM170 User Guide M212259EN-B

3.3 Vaisala Insight Software

Vaisala Insight software is a configuration software for Indigo-compatible devices. The supported operating systems are Windows 7 (64-bit), Windows 8.1 (64-bit), and Windows 10 (64-bit).

With the Insight software, you can: • See device information and status • See real-time measurement • Calibrate and adjust the device • Configure device features such as measurement filtering, chemical purge, heating, and serial communication Download Vaisala Insight software at www.vaisala.com/insight .

HMM170 can be connected to Vaisala Insight software using a Vaisala USB cable (no. 219690).

3.3.1 Connecting to Insight Software

• Computer with Vaisala Insight software installed • USB connection cable (order code 219690)

SERVICE D+ D− GND GND + VIN − + CH1 − + CH2 − + CH3 − PURGE

Figure 4 Connecting Module to Insight 1. Open the Insight software.

2. Connect the USB cable to a free USB port on the PC.

3. Connect the USB cable to the service port of the module. The USB cable powers up the module.

3.3.2 Configuration Options

Select

> Configure Device

to access configuration options in Insight software.

The available configuration options correspond to the Modbus configuration registers. Insight software is the recommended way to change the device configuration.

16

Chapter 3 – Installation You can restore the device back to its default settings using the

Factory Default Settings > Restore Settings

function. Doing this will also clear any user adjustment and restore the latest factory calibration.

More Information

Modbus Reference (page 28)

17

HMM170 User Guide

4. Operation

M212259EN-B

4.1 Using Service Port

HMM170 has a 4-pin M8 service port connector on the component board. Vaisala offers an optional USB cable (Vaisala order code 219690) for connecting the module to your PC.

The service port is intended for short-term use such as calibration. For permanent installation, use the permanent digital Modbus and/or analog terminals.

If you have not used the HMM170 USB cable before, first install the driver.

More Information

Installing the Driver for the USB Service Cable (page 18)

4.1.1 Installing the Driver for the USB Service Cable

Only Windows â operating systems are supported by the driver of the USB service cable.

1. Connect the USB service cable to a USB port on your computer. Windows â detects the new device and installs the appropriate driver.

2. Open

Devices and Printers

from the Windows â Start menu. Use search to find it if necessary (search for "devices").

18

Chapter 4 – Operation 3. Locate the cable in the list of devices: • If the device is listed as

Vaisala USB Device

with a COM port number in brackets, the cable is ready for use.

Note the COM port number, you will need it later.

• If the device is listed as

Vaisala USB Instrument Cable

without a COM port number listed, you must install the driver manually.

4. To install the driver manually: a. Disconnect the USB service cable from the computer.

b. Download the Vaisala USB driver at http://www.vaisala.com/software (select the appropriate USB Instrument Driver Setup for your cable).

c. Run the USB driver installation program

Vaisala USB Device Driver Setup.exe

. Accept the installation defaults.

d. Go back to step 1

and verify that the driver installation works as expected.

4.2 Modbus

The module can be accessed using the Modbus serial communication protocol. The supported Modbus variant is Modbus RTU (Serial Modbus) over RS-485 interface.

More Information

Modbus Reference (page 28)

19

HMM170 User Guide

5. Maintenance 5.1 Cleaning Probe

• Lint-free cloth • Isopropyl alcohol (70 %) M212259EN-B CAUTION!

Do not attempt to clean the sensors under the filter in any way.

1. Moisten a lint-free cloth with isopropyl alcohol (70 %).

2. Wipe the probe head and cable with the lint-free cloth. Do not spray anything directly on the probe head or immerse the probe head in liquid, since that may deposit impurities on the sensors.

Do not wipe the filter: wiping the filter may block its pores and/or deposit residue on the filter. If the filter is heavily contaminated, replace it.

3. After cleaning the probe, it is recommended to perform a chemical purge.

More Information

‣ ‣

Chemical Purge (page 11)

Replacing Filter (page 20)

5.2 Replacing Filter

• New compatible filter • Clean lint-free gloves CAUTION!

Without the filter in place, the sensor is easily damaged – handle the probe head carefully.

20

Chapter 5 – Maintenance 1. Put on clean gloves before touching the filter.

2. Turn the filter counter-clockwise to loosen it.

3. Remove the filter from the probe head. Be careful not to touch the sensor with the filter.

4. Install a new filter on the probe head. Tighten the filter properly (recommended force 5 Nm).

More Information

‣ ‣

Filter Types (page 11)

Accessories and Spare Parts (page 27)

5.3 Calibration and Adjustment

The module is fully calibrated and adjusted as shipped from the factory. To maintain the accuracy of the measurement, calibrate and adjust the module as needed. Typical calibration interval is one year, but depending on the application it may be necessary to check the accuracy more frequently.

When adjustment is necessary, you can have Vaisala calibrate and adjust the module. To order calibration services from Vaisala, visit store.vaisala.com

. You can also do the adjustment yourself using the Insight software.

WARNING!

When returning a product for calibration or repair, make sure it has not been exposed to dangerous contamination, and is safe to handle without special precautions.

If you think the device is not measuring correctly, calibration and adjustment is not the first thing to do. Check the following first: • Make sure nothing is interfering with the measurement: heat sources, temperature differences, or condensation.

• Check that there is no moisture on the probe. If the sensor has become wet, wait for it to dry.

• Always wait for the measurement to stabilize.

Calibration

means comparing the measurement output of the device to a known reference, such as a known environment in a calibration chamber or the output of a reference instrument. Correcting the reading of the device so that it measures accurately is referred to as

adjustment

.

21

HMM170 User Guide M212259EN-B

5.3.1 Adjustment Points and Requirements

You can adjust the humidity measurement in 1 … 5 points, and temperature measurement in 1 … 2 points. Note the following: • Humidity adjustment in more than two points is available when using Insight software in

Advanced Mode

.

• If you are adjusting in more than one humidity point, make sure the first two points are at least 10 %RH apart.

• The module will reject adjustments that are too large, that is, greater than 10 %RH for humidity and 0.5 °C (0.9 °F) for temperature. If the module appears to need such a large correction, perform a sensor purge and repeat the adjustment procedure. Make sure the measurement has stabilized and the reference environment is reliable. If the required adjustment is still too large, the module needs to be serviced by Vaisala.

When adjustment of humidity measurement is necessary, Vaisala recommends adjusting in two points, 11 %RH and 75 %RH. These humidities can be produced using the Vaisala HMK15 Humidity Calibrator.

Adjustment of temperature measurement is typically not necessary.

5.3.2 Adjusting Measurement with Insight Software

• Computer with Windows operating system and Vaisala Insight software installed • Vaisala USB cable 219690 for connecting the module • Reference environment(s) for producing the desired humidity and/or temperature This procedure can be used to adjust the module's humidity or temperature measurement. If you want to adjust both, repeat the procedure.

Because stabilization of temperature and humidity takes time, you should expect the adjustment procedure to take at least 30 minutes for each adjustment point.

1. Connect the module to Insight. See

Connecting to Insight Software (page 16) .

2. If you intend to adjust humidity measurement, first select

> Purge

to perform a chemical purge to condition the sensor. Wait a few minutes for purge to complete.

3. Select

> Calibrate > Yes

In calibration mode, the device will not use functions that may interfere with calibration and adjustment.

to switch the module to calibration mode. 4. Select the type of adjustment to perform:

RH adjustment

or

T adjustment

.

22

Chapter 5 – Maintenance 5. Define the needed adjustment for the first measurement point: a. Insert the probe head in the reference environment for the first calibration point.

b. Wait for the measurement to stabilize fully.

c. Click the

Reference value, point 1

text box and enter the reference value of the calibration point. Press

ENTER

or click outside the text box when done.

d. The module automatically enters the measured values for the calibration point.

6. If you want to adjust in more than one point, repeat step 5

for all desired calibration points. You can adjust humidity measurement in up to five points when Insight is set to

Advanced mode

.

7. Select

Activate adjustment > Yes

to store the adjustment in the module.

8. Check the message that appears at the top of the screen. If the message indicates that the adjustment is activated successfully, your adjustment is stored in the module.

9. Select the

Calibration information

tab and update the

Calibration date

and

Calibration text

.

10. Select

Close > Yes

to exit the calibration mode.

23

HMM170 User Guide

6. Technical Data

M212259EN-B

6.1 HMM170 Specifications

Table 7 Measurement Performance

Property Relative Humidity

Measurement range Accuracy

1) 2)

at +15 … +25 °C (59 … +77 °F)

Description/Value

0 … 100 %RH at -20 … +40 °C (-4 … +104 °F) at -40 … +180 °C (-40 … +356 °F) Factory calibration uncertainty at

+20 °C (+68 °F)

T 90

3)

Humidity sensor types

response time 4)

±1 %RH (0 … 90 %RH) ±1.7 %RH (90 … 100 %RH) ± (1.0 + 0.008 × reading) %RH ± (1.5 + 0.015 × reading) %RH ±0.6 %RH (0 … 40 %RH) ±1.0 %RH (40 … 90 %RH) ±1.1 %RH (90 … 95 %RH) HUMICAP â R2C HUMICAP â 180L2 HUMICAP â 180VC 50 s with steel mesh filter 60 s with sintered filter

Temperature

Measurement range Temperature sensor Typical accuracy at +20 °C (+68 °F) -70 ... +180 °C (-94 ... +356 °F) Pt100 RTD Class F0.1 IEC 60751 ±0.2 °C (± 0.36 °F)

1) Including non-linearity, hysteresis and repeatability.

2) With HUMICAP

â

180VC sensor, accuracy is not specified below −20 °C (−4 °F) operating temperature.

3) Defined as ±2 standard deviation limits. Small variations possible; see also calibration certificate.

4) At +20 °C (+68 °F) in 0.1 m/s air flow with Vaisala HUMICAP

â

R2C sensor.

24

Chapter 6 – Technical Data °C 0.7

0.6

0.5

0.4

0.3

0.2

0.1

0 -0.1

-0.2

-0.3

-0.4

-0.5

-0.6

-0.7

-80 -60 -40 -20 0 20 40 60 80 100 120 140 160 Figure 5 Temperature Measurement Accuracy over Temperature Range °C 180 Table 8 Operating Environment

Property Description/Value

Operating temperature for component board -40 … +60 °C (-40 … +140 °F) Operating humidity range for component board 0 … 100 %RH, non-condensing Storage temperature -55 … +80 °C (-67 … +176 °F) Operating pressure 0 … 10 bar Table 9 Inputs and Outputs

Property

Three analog outputs (selectable and scalable)

Description/Value

0 … 20 mA, 4 … 20 mA 0 … 1 V, 0 … 5 V, 1 … 5 V, or 0 … 10 V ±0.05 % full scale Typical accuracy of analog output at +20 °C (+68 °F) Typical temperature dependence of analog output External load Digital output Service port Operating voltage Start-up time Maximum wire size 0.005 %/˚C (0.003 %/°F) full scale R L < 500 Ω RS-485 serial, Modbus M8 connector for USB cable 15 … 35 VDC 3 s at power-up 0.5 … 1.5 mm 2 (AWG) 25

HMM170 User Guide

Property Power Consumption

Analog outputs Chemical purge at 24 VDC Warmed probe at 24 VDC

Description/Value

12 mA (voltage) 50 mA (current) +220 mA +240 mA 99.5 [3.92] 79.5 [3.13] 37.5 [1.48] Ø 5 [0.2] Ø 12 [0.47] Figure 6 Probe Head Dimensions 58.3 [2.30] 21.8 [0.86] Groove for lock ring Ø 12 [0.47] mm [in] M212259EN-B 68.3 [2.69] Figure 7 Component Board Dimensions 26 mm [in]

Chapter 6 – Technical Data

6.2 Accessories and Spare Parts

Table 10 Accessories

Item

USB cable for PC connection

Cable gland M20×1.5 for probe cable Swagelok NPT 1/2" adapter for probe Swagelok ISO 1/2" adapter for probe Duct installation kit for probe

1)

1)

Order Code

219690 HMP247CG SWG12NPT12 SWG12ISO12 210697

Vaisala Insight software for Windows available at www.vaisala.com/insight

Table 11 Spare Parts

Item

PPS plastic grid and stainless steel mesh filter Stainless steel sintered filter Sintered PTFE filter with 20 μm pore size Stainless steel filter

Order Code

DRW010281SP HM47280SP 219452SP HM47453SP 27

HMM170 User Guide

Appendix A. Modbus Reference

M212259EN-B

A.1 Default Communication Settings

Table 12 Default Modbus Serial Communication Settings

Property

Serial bit rate Parity Number of data bits Number of stop bits Flow control Modbus device address

Description/Value

19200 None 8 2 None 240 You can use up to ten probes on the same RS-485 line. You must configure each probe on the line to have a different Modbus address.

A.2 Function Codes

Table 13 Modbus Function Codes

Function Code (Decimal)

03

Function Code (Hexadecimal)

03 hex 16 43 / 14 10 hex 2B hex / 0E hex

Name

Read Holding Registers Write Multiple Registers Read Device Identification

Notes

Class 0 Class 0

A.3 Data Encoding

In the data registers, the numeric values are available in one or two formats with separate register addresses: 32-bit IEEE floating point format and/or 16-bit signed integer format.

28

Appendix A – Modbus Reference

A.3.1 32-Bit Floating Point or Integer Format

Least significant 16 bits of floating point or integer numbers are placed at the smaller Modbus address as specified in Open Modbus TCP Specification, Release 1.0. This is also known as "little-endian" or "Modicon" word order. Floating point values are represented in standard IEEE 32-bit floating point format.

Despite the specification, some Modbus masters may expect "big-endian" word order (most significant word first). In such case, you must select "word-swapped" floating point format in your Modbus master for the Modbus registers of the device.

A "quiet NaN" value is returned for unavailable values. A quiet NaN is, for example, 7FC00000 hex ; however, the master should understand any NaN value.

A complete 32-bit floating point or integer value should be read and written in a single Modbus transaction.

A.3.2 16-Bit Integer Format

Some 16-bit integer values in the data registers are scaled to include the necessary decimals.

The scaling factors for those values are shown in the register tables.

Table 14 16-bit Signed Integer Format Details

Value

0000 hex … 7FFE hex 8002 hex … FFFF hex 8000 hex

Description

Value in range 0 … 32766 Value in range -32766 … -1 (2’s complement) Value is not available (quiet NaN) Some values may exceed the signed 16-bit range even in normal operation. To access such values, use the floating point registers instead.

A.4 Modbus Registers

CAUTION!

Registers are numbered in decimal, starting from 1. Register addresses in actual Modbus messages (Modbus Protocol Data Unit (PDU) are in hexadecimal and start from zero. Subtract 1 from the register number presented in this manual to get the address used in the Modbus message (for example, register number 1 corresponds to address 0 hex in the actual Modbus message).

29

HMM170 User Guide M212259EN-B Accessing unavailable (temporarily missing) measurement data does not generate an exception. “Unavailable” value (a quiet NaN for floating point data or 8000 register ranges.

hex for integer data) is returned instead. An exception is generated only for any access outside the applicable

A.4.1 Measurement Data Registers

15 17 19 21 23 25 Table 15 Modbus Measurement Data Registers (Read-Only)

Register Number (Decimal)

1 3 7 9

Floating Point Values

0000 hex 0002 hex 0006 hex 0008 hex 11 13 27 29 31 33 35

Address (Hexadecimal)

000A 000C 0016 0018 001A 001C 001E 0020 0022 hex hex 000E hex 0010 hex 0012 hex 0014 hex hex hex hex hex hex hex hex

Register Description

Relative humidity Temperature Dew point temperature Dew/frost point temperature Dew/frost point temperature at 1 atm Dew point temperature at 1 atm Absolute humidity Mixing ratio Wet-bulb temperature Water concentration Water vapor pressure Water vapor saturation pressure Enthalpy Water activity Dew point temperature difference Absolute humidity at NTP Water concentration in oil

Data Format

32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float 32-bit float

Metric Unit

%RH °C °C °C °C °C g/m 3 g/kg °C ppm v hPa hPa kJ/kg a w °C g/m 3 ppm w 30

Appendix A – Modbus Reference

Register Number (Decimal) Address (Hexadecimal) Floating Point Values

41 65 0028 hex 0040 hex

Integer Values

257 0100 hex

Register Description

Relative saturation Water mass fraction Relative humidity 258 260 261 262 263 264 265 266 267 268 269 270 271 272 0101 0103 0104 0105 0106 0107 0108 hex 0109 010A 010B 010C 010D 010E 010F hex hex hex hex hex hex hex hex hex hex hex hex hex

Data Format

32-bit float 32-bit float Temperature Dew point temperature Dew/frost point temperature Dew/frost point temperature at 1 atm Dew point temperature at 1 atm Absolute humidity Mixing ratio Wet-bulb temperature Water vapor concentration Water vapor pressure Water vapor saturation pressure Enthalpy Water activity Dew point temperature difference 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer

Metric Unit

% ppm w %RH * 100 °C * 100 °C * 100 °C * 100 °C * 100 °C * 100 g/m 3 * 100 g/kg * 100 °C * 100 ppm v hPa * 10 hPa * 10 kJ/kg * 100 a w °C * 10 31

HMM170 User Guide M212259EN-B

Integer Values

273 0110 hex 274 277 0111 hex 0114 hex 289 0120 hex Absolute humidity at NTP Parts per million in oil Relative saturation Water mass fraction 16-bit signed integer 16-bit signed integer 16-bit signed integer 16-bit signed integer g/m 3 * 100 ppm w % * 100 ppm w

A.4.2 Configuration Registers

Table 16 Modbus Configuration Data Registers (Writable)

Register Number (Decimal) General

1287

Register Address (Hexadecimal)

0506 hex

Register Description

1289 2561 0508 0A00 hex hex

Data Format

Extra heat on/off.

Enables heating of humidity sensor when close to saturation.

Measurement is disabled for the duration of heating and cooling.

Probe heating on/off.

When on, output parameters that depend on temperature measurement (for example, relative humidity) are disabled unless temperature is written to register 0334 hex from an external source.

User information 16-bit boolean 16-bit boolean Text

Unit / Valid Range

0 = Off (default) 1 = On 0 = Off (default) 1 = On Text string of 24 bytes in UTF-8 encoding 32

Appendix A – Modbus Reference

Compensation Setpoints

769 821

Purge

773 1283 1284 0300 0334 hex hex 0304 hex 0502 hex 0503 hex Pressure compensation setpoint 32-bit float Temperature compensation setpoint. If a value is written to this register, the device uses it instead of its own temperature measurement.

When probe heating is in use, temperature must be written to this register to enable output parameters that depend on temperature measurement (for example, relative humidity).

32-bit float Unit: hPA Default: 1013.25

hPa Unit: °C Purge interval Interval purge on/off Startup purge on/off 32-bit float 16-bit boolean 16-bit boolean Unit: min 10 ... 14400 0 = Off 1 = On 0 = Off 1 = On 33

HMM170 User Guide

Filtering

795 031A hex M212259EN-B 1281 1282 0500 hex 0501 hex

Communication

1537 0600 hex Measurement filtering factor Filtering on/off Enable or disable measurement filtering using the user-defined filtering factor (register 031A hex ) 32-bit float 16-bit boolean 16-bit boolean Range: 0.000 ...

1.000

1.000 = Reading shows 100 % of the most recent measured value (no filtering, default).

0.01 ... 0.99 = Reading shows 1 ... 99 % of the most recent measured value and part of the previous reading (filtering is applied). For example, "0.9" means that the filtered measurement reading = 90 % of the most recent measured value + 10 % of the previous reading.

0 = Off 1 = On 0 = Off 1 = On Modbus address 16-bit integer 1 ... 247 Default: 240 34

Appendix A – Modbus Reference

Communication

1538 1539 1540 1542 0601 0602 hex hex 0603 hex

Functions

1285 0504 hex 0605 hex Bit rate Parity, data, stop bits Response delay enum enum 16-bit integer 0 = 300 1 = 600 2 = 1200 3 = 2400 4 = 4800 5 = 9600 6 = 19200 7 = 38400 8 = 57600 9 = 115200 0 = None, 8, 1 1 = None, 8, 2 2 = Even, 8, 1 3 = Even, 8, 2 4 = Odd, 8, 1 5 = Odd, 8, 2 (default: 1 = None, 8, 2) Unit: ms Range: 0 ...

1000 Purge Restart device 16-bit function status 16-bit function status When writing to register: 1 = Activate purge When writing to register: 1 = Restart the device 35

HMM170 User Guide M212259EN-B

A.4.3 Device Identification Objects

Table 17 Device Identification Objects 0 1 3 4

Object Id (Decimal)

128 129 130

Object Id (Hexadecimal) Object Name

00 01 03 04 80 81 82 hex hex hex hex hex hex hex VendorName ProductCode VendorUrl ProductName SerialNumber CalibrationDate CalibrationText

Example Contents

“Vaisala” "HMM170" “http://www.vaisala.com/” "Vaisala HUMICAP(R) Humidity and Temperature Module HMM170" "NOT SET"

A.4.4 Test Value Registers

Read the known test values from the test registers to verify the functionality of your Modbus implementation.

Table 18 Modbus Test Registers (Read-Only)

Register Number (Decimal)

7937 7938 7940

Register Address (Hexadecimal)

1F00 hex 1F01 1F03 hex hex

Register Description

Signed integer test Floating point test Text string test

Data Format

16-bit integer 32-bit float text

Test Value

-12345 -123.45

Text string "-123.45" 36

Appendix A – Modbus Reference

A.4.5 Modbus Communication Examples

Reading Relative Humidity Value Device address used in the following examples is 240 (F0 hex ).

The values returned by the device differ depending on the ambient conditions and/or device settings. Your device might not return exactly the same values.

Request Bytes on the Line (Hexadecimal)

(silence for 3.5 bytes) F0 03 hex hex

Description

Start of Modbus RTU frame Device address Function (Read Holding Registers) Register address 00 hex 00 hex 00 hex 02 hex D1 hex 2A hex (silence for 3.5 bytes) Number of 16-bit registers to read (2) Modbus RTU checksum End of Modbus RTU frame

Response Bytes on the Line (Hexadecimal)

(silence for 3.5 bytes) F0 03 04 7A E1 hex hex hex hex hex 41 hex F4 hex 05 hex 06 hex

Description

Start of Modbus RTU frame Device address Function (Read Holding Registers) Number of data bytes Value of first register (least significant word) Value of second register (most significant word) Modbus RTU checksum (silence for 3.5 bytes) End of Modbus RTU frame

Communication Description

Register address Data format Returned value 1 (1-based Modbus documentation format) = 0000 hex (0-based format used in actual communication).

Two 16-bit Modbus registers interpreted as IEEE 754 binary32 floating point value, least significant word first.

41F47AE1 hex , which is binary32 representation of 30.56 (%RH).

37

HMM170 User Guide M212259EN-B Writing Pressure Compensation Value

Request Bytes on the Line (Hexadecimal)

(silence for 3.5 bytes) F0 10 hex hex

Description

Start of Modbus RTU frame Device address Function (Write Multiple Registers) Register address 03 hex 00 hex 00 hex 02 hex 04 hex 6E hex 14 hex 44 hex 75 hex AB hex 4E hex (silence for 3.5 bytes) Number of registers to write (2) Number of data bytes Value for first register (least significant word) Value for second register (least significant word) Modbus RTU checksum End of Modbus RTU frame

Response Bytes on the Line (Hexadecimal)

(silence for 3.5 bytes) F0 10 03 00 00 02 AD 54 hex hex hex hex hex hex hex hex (silence for 3.5 bytes)

Description

Start of Modbus RTU frame Device address Function (Write Multiple Registers) Register address Number of 16-bit registers written (2) Modbus RTU checksum End of Modbus RTU frame The response to a write function informs that the function was correctly received by the device. It does not guarantee that the written value was accepted by the device (for example, in case of out-of-range values).

To verify that the value was really accepted by the device, read the register value after writing.

Communication Description

Register address 769 (1-based Modbus documentation format) = 0300 hex (0-based format used in actual communication).

38

Communication Description

Data format Value to write Appendix A – Modbus Reference Two 16-bit Modbus registers interpreted as IEEE 754 binary32 floating point value, least significant word first.

44756E14 hex = 981.72 (hPa) 39

HMM170 User Guide M212259EN-B 40

Warranty

For standard warranty terms and conditions, see warranty for each product.

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

Technical Support

Contact Vaisala technical support at [email protected]

. Provide at least the following supporting information as applicable: • Product name, model, and serial number • Software/Firmware version • Name and location of the installation site • Name and contact information of a technical person who can provide further information on the problem For more information, see www.vaisala.com/support .

Recycling

Recycle all applicable material.

Follow the statutory regulations for disposing of the product and packaging.

41

HMM170 User Guide M212259EN-B 42

www.vaisala.com

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