Vaisala HUMICAP HMW90 SERIES User manual

USER'S GUIDE
Vaisala HUMICAP® Humidity and
Temperature Transmitte
r
HMW90 Series
M211399EN-A

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 2011
No part of this manual may be reproduced in any form or by any means, electronic or
mechanical (including photocopying), nor may its contents be communicated to a third
party without prior written permission of the copyright holder.
The contents are subject to change without prior notice.
Please observe that this manual does not create any legally binding obligations for
Vaisala towards the customer or end user. All legally binding commitments and
agreements are included exclusively in the applicable supply contract or Conditions of
Sale.

________________________________________________________________________________
VAISALA ________________________________________________________________________ 1
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......................................................................................... 6
ESD Protection...................................................................... 7
Recycling .................................................................................. 7
Regulatory Compliances ......................................................... 7
Patent Notice ............................................................................ 8
Trademarks ............................................................................... 8
License Agreement .................................................................. 8
Warranty.................................................................................... 8
CHAPTER 2
PRODUCT OVERVIEW.................................................................................. 9
Introduction to HMW90 Series ................................................ 9
HMW90 Series Transmitters.................................................. 10
Supported Quantities............................................................. 10
Transmitter parts.................................................................... 11
CHAPTER 3
INSTALLATION............................................................................................ 13
Configuration Before Installation ......................................... 13
Configuration Using DIP Switches ...................................... 14
Relay Configuration in Rotary Switch Mode ....................... 15
Selecting Location ................................................................. 17
Wiring ...................................................................................... 18
Wiring HMW92 .................................................................... 18
Wiring HMW93 .................................................................... 19
CHAPTER 4
OPERATION................................................................................................. 21
Display..................................................................................... 21
Startup Screens .................................................................. 21
Measurement Screen.......................................................... 22
Indicators on the Display..................................................... 22
Service Port ............................................................................ 23
Connecting With an MI70 Indicator..................................... 23
Connecting With a PC......................................................... 23
Installing the Driver for the USB Service Cable ............. 24

USER'S GUIDE____________________________________________________________________
2 ___________________________________________________________________ M211399EN-A
Terminal Application Settings.........................................25
List of Serial Commands .......................................................27
Transmitter Information .........................................................28
Show Transmitter Information .............................................28
Show Transmitter Firmware Version...................................28
Show Transmitter Serial Number ........................................28
Show Transmitter Status .....................................................29
Show Measured Quantities .................................................30
Show Command List ...........................................................30
Show Command Help .........................................................31
Measurement Settings ...........................................................31
Set Environmental Parameters ...........................................31
Select Units .........................................................................32
Analog Output Settings .........................................................32
Set Analog Output Mode .....................................................32
Set Analog Output Scaling ..................................................33
Set Output Clipping and Error Limit.....................................34
Display Settings......................................................................35
Select Quantities to Display ................................................35
Serial Line Output Commands..............................................36
Start Measurement Output..................................................36
Stop Measurement Output ..................................................36
Output a Reading Once.......................................................36
Set Output Interval...............................................................37
Set Output Format...............................................................38
Serial Line Settings ................................................................39
Set Remote Echo ................................................................39
Set Serial Line Response Time...........................................40
Relay Configuration in Custom Mode ..................................40
Set Relay Mode...................................................................40
Set Relay Quantity and Limits.............................................41
Relay Configuration Examples............................................42
Calibration and Adjustment Commands..............................43
Adjust Humidity Measurement ............................................43
Show Current RH Adjustment ........................................43
1-point Adjustment of RH Measurement........................44
2-point Adjustment of RH Measurement........................44
Clear User Adjustment of RH Measurement..................45
Adjust Temperature Measurement......................................45
Show Current T Adjustment ...........................................45
1-point Adjustment of T Measurement...........................45
Clear User Adjustment of T Measurement.....................46
Enter Calibration and Adjustment Information ....................46
Testing Commands ................................................................47
Test Analog Outputs............................................................47
Test Relay Operation...........................................................48
Other Commands ...................................................................48
Enable Advanced Serial Commands...................................48
Revert to Factory Settings...................................................49
Reset Transmitter................................................................49

________________________________________________________________________________
VAISALA ________________________________________________________________________ 3
CHAPTER 5
MAINTENANCE ........................................................................................... 50
Periodic Maintenance ............................................................ 50
Cleaning .............................................................................. 50
Calibration and Adjustment................................................. 51
Adjustment Using Display and Trimmers....................... 52
Adjustment Using an HM70 ........................................... 53
Adjustment Using a PC.................................................. 54
Repair Maintenance ............................................................... 55
Replacing the HTM10 Module............................................. 55
CHAPTER 6
TROUBLESHOOTING ................................................................................. 57
Problem Situations................................................................. 57
Error Messages ...................................................................... 58
Error Messages on the Display........................................... 58
Error Messages on the Serial Line...................................... 58
View Currently Active Errors .......................................... 58
View Error Table ............................................................ 59
Error State............................................................................... 60
Technical Support .................................................................. 60
Product Returns ..................................................................... 60
CHAPTER 7
TECHNICAL DATA ...................................................................................... 61
Specifications ......................................................................... 61
Spare Parts and Accessories................................................ 62
Dimensions in mm ................................................................. 63

USER'S GUIDE____________________________________________________________________
4 ___________________________________________________________________ M211399EN-A
List of Figures
Figure 1 HMW90 Series Transmitters ......................................................9
Figure 2 Transmitter Parts – Outside......................................................11
Figure 3 Transmitter Parts - Inside .........................................................12
Figure 4 DIP Switch Settings ..................................................................14
Figure 5 Relay High in Rotary Switch Mode...........................................16
Figure 6 Relay Low in Rotary Switch Mode............................................16
Figure 7 Selecting Transmitter Location.................................................17
Figure 8 Wiring HMW92..........................................................................18
Figure 9 Wiring HMW93..........................................................................19
Figure 10 Three-Wire Wiring for HMW93 .................................................19
Figure 11 Connecting a Common AC Power Supply ...............................19
Figure 12 HMW93 Startup Screens..........................................................21
Figure 13 Measurement Screen – Normal Operation...............................22
Figure 14 Measurement Screen – Problem With Measurement ..............22
Figure 15 PuTTY Terminal Application.....................................................26
Figure 16 Relay Hi_Active in Custom Mode.............................................42
Figure 17 Relay Lo_active in Custom Mode.............................................42
Figure 18 Trimmer Centering Screen .......................................................52
Figure 19 Trimmer Centering Screen .......................................................52
Figure 20 Replacing the HTM10 Module..................................................55
Figure 21 HMW90 Series Dimensions......................................................63
Figure 22 Dimensions of the Mounting Base............................................63
List of Tables
Table 1 Manual Revisions .......................................................................6
Table 2 Related Manuals.........................................................................6
Table 3 HMW90 Series Transmitters ....................................................10
Table 4 Quantities Supported by HMW90 Series..................................10
Table 5 Rotary Switch and Relay Setpoint............................................15
Table 6 Serial Interface Settings ...........................................................25
Table 7 Basic Serial Commands ...........................................................27
Table 8 Advanced Serial Commands....................................................27
Table 9 FORM Command Parameters..................................................39
Table 10 FORM Command Modifiers......................................................39
Table 11 Troubleshooting Table..............................................................57
Table 12 Error Messages on the Display ................................................58
Table 13 Error Messages on the Serial Line ...........................................59
Table 14 Performance .............................................................................61
Table 15 Operating Environment.............................................................61
Table 16 Inputs and Outputs ...................................................................62
Table 17 Mechanics.................................................................................62
Table 18 HMW90 Series Spare Parts and Accessories..........................62

Chapter 1 ________________________________________________________ General Information
VAISALA ________________________________________________________________________ 5
CHAPTER 1
GENERAL INFORMATION
This chapter provides general notes for the manual and HMW90 series
transmitters.
About This Manual
This manual provides information for installing, operating, and
maintaining HMW90 series transmitters.
Contents of This Manual
This manual consists of the following chapters:
- Chapter 1, General Information, provides general notes for the manual
and HMW90 series transmitters.
- Chapter 2, Product Overview, introduces the features, advantages, and
the product nomenclature.
- Chapter 3, Installation, provides you with information that is intended
to help you install the HMW90 series transmitters.
- Chapter 4, Operation, contains information that is needed to operate
the HMW90 series transmitters.
- Chapter 5, Maintenance, provides information that is needed in basic
maintenance of the HMW90 series.
- Chapter 6, Troubleshooting, describes common problems, their
probable causes and remedies, and provides contact information for
technical support.
- Chapter 7, Technical Data, provides the technical data of the HMW90
series transmitters.

USER'S GUIDE____________________________________________________________________
6 ___________________________________________________________________ M211399EN-A
Version Information
Table 1 Manual Revisions
Manual Code Description
M211399EN-A December 2011. This manual. First version.
Related Manuals
Table 2 Related Manuals
Manual Code Manual Name
M211398EN HMW92 and HMW93 Quick 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.
Safety
The HMW90 series transmitter delivered to you has been tested and
approved as shipped from the factory. Note the following precautions:
CAUTION Do not modify the unit. Improper modification can damage the product
or lead to malfunction.

Chapter 1 ________________________________________________________ General Information
VAISALA ________________________________________________________________________ 7
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. It is possible to damage the product,
however, by delivering electrostatic discharges when touching,
removing, or inserting any objects inside the equipment housing.
To make sure you are not delivering high static voltages yourself:
- Handle ESD sensitive components on a properly grounded and
protected ESD workbench.
- Always hold component boards by the edges and avoid touching the
component contacts.
Recycling
Recycle all applicable material.
Dispose of the unit according to statutory regulations. Do not dispose of
with regular household refuse.
Regulatory Compliances
The HMW90 series complies with the following performance and
environmental test standards:
- EMC-Directive
Conformity is shown by compliance with the following standards:
- EN 61326-1: Electrical equipment for measurement, control, and
laboratory use – EMC requirements – for use in industrial locations.
- EN 550022: Information technology equipment – Radio disturbance
characteristics – Limits and methods of measurement.

USER'S GUIDE____________________________________________________________________
8 ___________________________________________________________________ M211399EN-A
Patent Notice
The HMW90 series is protected by, for example, the following patents
and their corresponding national rights:
Finnish patent 98861, French patent 6650303, German patent 69418174,
Japanese patent 3585973, UK patent 0665303, U.S. patent 5607564.
Trademarks
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.
Warranty
Visit our Internet pages for our 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.

Chapter 2 __________________________________________________________ Product Overview
VAISALA ________________________________________________________________________ 9
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the features, advantages, and the product
nomenclature.
Introduction to HMW90 Series
HMW92 and HMW93 are wall-mount transmitters for building
automation applications. Common features:
- Display (visible or hidden behind the cover).
- Sliding cover for accessing maintenance functions.
- Adjustment trimmers for humidity and temperature measurement.
- DIP switches for most common configuration tasks.
- RS-485 line for temporary service use with hand-held MI70 indicator
or PC.
1111-062
Figure 1 HMW90 Series Transmitters

USER'S GUIDE____________________________________________________________________
10 __________________________________________________________________ M211399EN-A
HMW90 Series Transmitters
Table 3 below lists the most important differences between the HMW90
series transmitter models. For more information, see Chapter 7,
Technical Data, on page 61.
Table 3 HMW90 Series Transmitters
Product Code Short Description
HMW92 Humidity and temperature transmitter with
- two current outputs (4 ... 20 mA)
- display hidden under sliding cover
HMW92D Humidity and temperature transmitter with
- two current outputs (4 ... 20 mA)
- visible display
HMW93 Humidity and temperature transmitter with
- two voltage outputs (0 ... 5 V or 0 ... 10 V)
- relay
- display hidden under sliding cover
HMW93D Humidity and temperature transmitter with
- two voltage outputs (0 ... 5 V or 0 ... 10 V)
- relay
- visible display
Supported Quantities
Table 4 Quantities Supported by HMW90 Series
Quantity Symbol Unit(s) Description
Temperature T °C
°F
Temperature in Celsius or
Fahrenheit scale.
Relative
humidity
RH % Ratio of the partial pressure of
water vapor in the air to the
saturation vapor pressure of air
at the current temperature.
Dewpoint Td °C
°F
Temperature at which the water
vapor in the air will condense into
water at the current pressure.
Dewpoint Tdf °C
°F
Same as Td, except when the
dewpoint is below 0 °C, the
transmitter outputs frostpoint (Tf)
instead of dewpoint.
Dewpoint
depression
dTd °C
°F
Difference between ambient
temperature and dewpoint (Tdf).
Wet bulb
temperature
Tw °C
°F
The minimum temperature that
can be reached by evaporative
cooling in the current conditions.
Absolute
humidity
a g/m3
gr/ft3
Quantity of water in a cubic meter
(or cubic foot) of air.
Mixing ratio x g/kg
gr/lb
Ratio of water vapor mass per
kilogram (or pound) of dry air.
Enthalpy h kJ/kg
btu/lb
Sum of the internal energy of a
thermodynamic system.

Chapter 2 __________________________________________________________ Product Overview
VAISALA _______________________________________________________________________ 11
Transmitter parts
Push tab down
with a screwdriver
to open transmitter
Grip for
slide
Display Adjustment
trimmers
Service port
Locking screw for
mounting base
(not included,
M3x6 recommended)
Window for display
Locking screw for
slide (not included,
M3x6 recommended)
Type
label
Figure 2 Transmitter Parts – Outside

USER'S GUIDE____________________________________________________________________
12 __________________________________________________________________ M211399EN-A
Terminal label
Orientation arrow
Opening for cable
(wiring from top)
Transmitter body
Mounting base
Place for zip tie
Opening for cable
(wiring from behind)
Relay setpoint (HMW93 only)
0=5%RH 1=10%RH
2=20%RH 3=30%RH
4=40%RH 5=50%RH
6=60%RH 7=70%RH
8=80%RH 9=90%RH
HTM10 module with
HUMICAP 180R sensor
DIPswitchesforcommon
configuration options
Non-Metric
T d
0...5V
RelayOn
RelayHigh
Custom
RelaySetPoint
Metric
RH
0...10V
RelayOff
RelayLow
DIP
Figure 3 Transmitter Parts - Inside

Chapter 3 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 13
CHAPTER 3
INSTALLATION
This chapter provides you with information that is intended to help you
install the HMW90 series transmitters.
Configuration Before Installation
If you need to change the settings of the transmitter, it is best to do this
before it has been installed. You can configure HMW90 series
transmitters in two ways:
- Using the DIP switches (and rotary switch on the HMW93) on the
component board. See the following sections for instuctions:
- Configuration Using DIP Switches on page 14
- Relay Configuration in Rotary Switch Mode on page 15
- Configuring the settings in software through the service port. See
connection instructions and serial line commands in Chapter 4,
Operation, on page 21.
These two configuration methods are mutually exclusive. If the DIP
switch configuration is used, software settings have no effect on settings
that are controlled by the DIP switches. DIP switch number 8 is the
master switch that controls which configuration method is used.

USER'S GUIDE____________________________________________________________________
14 __________________________________________________________________ M211399EN-A
Configuration Using DIP Switches
Non-Metric
Td
0...5V
Relay On
Relay High
Custom
Metric
RH
0...10V
Relay Off
Relay Low
DIP
12345678
Non-Metric
Td
Custom
Metric
RH
DIP
12345678
HMW92 HMW93
1111-066
Figure 4 DIP Switch Settings
DIP Position Setting
Non-metric Non-metric units (°F)1
Metric Metric units (°C)
Td Td (dewpoint) as humidity quantity on display and
analog output
2
RH RH (relative humidity) as humidity quantity on display
and analog output
0...5V 0...5V analog output (both channels)3
0...10V 0...10V analog output (both channels)
Relay On Relay enabled4
Relay Off Relay disabled
Relay High Relay closed when RH above setpoint5
Relay Low Relay closed when RH below setpoint
6 Not used
7 Not used
Custom Configuration through service port only8
DIP Configuration by DIP switches only
NOTE If DIP switch 8 is set to Custom, the transmitter ignores all other DIP
switch settings. In custom mode the transmitter uses settings that are
configured in software using the service port.
If you change the position of DIP switch 8, note the following:
- When changing from Custom to DIP: Current custom settings are
overwritten by the settings from the DIP switches at next power up.
Settings that do not have DIP switches remain unchanged, except for
display layout (DSEL command) that is set to default.
- When changing from DIP to Custom: The DIP settings that were
used when the power was last on are carried over to the custom
settings at next power up.

Chapter 3 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 15
Relay Configuration in Rotary Switch
Mode
NOTE Relay is included on HMW93 transmitters only.
When the transmitter is configured using DIP switches, the functioning
of the relay is configured by DIP switch 5 and the rotary switch on the
component board:
- DIP 5 determines if the relay is closed above or below the setpoint.
- The position of the rotary switch determines the setpoint according to
the table below.
Table 5 Rotary Switch and Relay Setpoint
Rotary Switch Position Relay Setpoint
0 5 %RH
1 10 %RH
2 20 %RH
3 30 %RH
4 40 %RH
5 50 %RH
6 60 %RH
7 70 %RH
8 80 %RH
9 90 %RH
NOTE The rotary switch only has 10 positions. Do not turn the switch so that it
is between two positions.
For examples of relay behavior in rotary switch mode, see Figure 5 and
Figure 6 on page 16. Note also the following:
- Relay operation in rotary switch mode is always linked to RH
measurement.
- Relay contacts are open if the transmitter is in error state (an active
error is present).
- Relay contacts are open when transmitter is powered off.
If you need to configure the relay for some other quantity or need
additional configuration options, see section Relay Configuration in
Custom Mode on page 40.

USER'S GUIDE____________________________________________________________________
16 __________________________________________________________________ M211399EN-A
90
70
80
100
60
50
40
Relative Humidity (%)
Time
30
20
10
0
Rotary switch set to 6 (60 %RH)
DIP 5 set to “Relay High”
Relay closed
Relay open
1111-117
Figure 5 Relay High in Rotary Switch Mode
90
70
80
100
60
50
40
Relative Humidity (
%
)
Time
30
20
10
0
Relay closed
Relay open
Rotary switch set to 6 (60 %RH)
DIP 5 set to “Relay Low”
1111-118
Figure 6 Relay Low in Rotary Switch Mode
NOTE There is a 2 %RH hysteresis around the setpoint value to prevent rapid
relay switching when the measured value moves around the setpoint.
This means that the relay will not close or open exactly at the setpoint,
but slightly above and below.

Chapter 3 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 17
Selecting Location
The conditions at the location should represent well the area of interest.
Do not install the transmitter on the ceiling. Avoid placing the transmitter
near heat and moisture sources, close to the discharge of the supply air
ducts, and in direct sunlight.
1111-070
Figure 7 Selecting Transmitter Location
Use the mounting holes to attach the mounting base securely. Use at least
two screws (not included, M3x6 recommended). Remember to leave
sufficient clearance below the transmitter to operate the slide. For
mounting dimensions, see section Dimensions in mm on page 63.
CAUTION The arrow on the mounting base must point straight up after installation.
Proper orientation is important: air must flow through the vents on the
bottom and top.

USER'S GUIDE____________________________________________________________________
18 __________________________________________________________________ M211399EN-A
Wiring
Connect the wiring to the screw terminals on the mounting base. The
supply voltage and terminal assignments are model-specific. Max wire
size 2 mm2 (AWG14).
After completing the wiring, connect the transmitter body over the
mounting base. Note that mounting bases are model-specific.
Wiring HMW92
You must connect the RH channel of the HMW92, even if you only want
to measure temperature. Connecting the T channel is optional.
-T -RH+T +RH
Power supply
10 ... 28 VDC
R
L
=0...600
Power supply
10 ... 28 VDC
R
L
=0...600
mA
mA
1111-067
Figure 8 Wiring HMW92