Vaisala HUMICAP HMW90 SERIES User manual

Quick Guide
M211398EN-E
Vaisala HMW90 and GMW90 Series
Transmitters with Analog Output
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PUBLISHED BY
Vaisala Oyj
Street address: Vanha Nurmijärventie 21
FI-01670 Vantaa, Finland
Mailing address: P.O. Box 26
FI-00421 Helsinki, Finland
Phone: [phone]
Fax: [phone]
Visit our Internet pages at www.vaisala.com.
© Vaisala 2015
No part of this manual may be reproduced, published
or publicly displayed in any form or by any means,
electronic or mechanical (including photocopying),
nor may its contents be modified, translated, adapted,
sold or disclosed to a third party without prior written
permission of the copyright holder. Translated manuals
and translated portions of multilingual documents are
based on the original English versions. In ambiguous
cases, the English versions are applicable, not the
translations.
The contents of this manual are subject to change
without prior notice.
This manual does not create any legally binding
obligations for Vaisala towards customers or end users.
All legally binding obligations and agreements are
included exclusively in the applicable supply contract
or the General Conditions of Sale and General
Conditions of Service of Vaisala.

1
ENGLISH
HMW90 and GMW90 Series Analog Models
Measurement type
HMW models
Humidity, temperature
TMW models
Te m pe ra t ur e
GMW93, GMW94, GMW90*
Carbon dioxide, temperature
GMW94R, GMW93R,
GMW90R*
Carbon dioxide, humidity,
and temperature
Output
1 ... 3 analog output channels
See type label on transmitter
Supply voltage
HMW92/TMW92
Other models
10 ... 28 VDC, loop powered
18 ... 35 VDC
24 VAC ±20 % 50/60 Hz
Power consumption
HMW models
TMW models
GMW models
< 1.2 W
< 0.6 W
< 2 W
Dimensions (h × w × d)
132.7 × 81 × 30 mm
Setpoints for CO
2
LEDs
Green 0 ... 800 ppm
Yellow 800 ... 1200 ppm
Red 1200 ... 5000 ppm
Red (blinking) > 5000 ppm
*Configurable model, see Order Form for options.
Datasheets and user’s guides (in English)
are available on product pages at
www.vaisala.com/hmw90
www.vaisala.com/gmw90.
EN

2
Product Safety Information
When installing the transmitter, do not touch
exposed contacts on the component board.
When opening or closing the transmitter, avoid
damaging the transmitter electronics with the
two plastic supports on the bottom of the
mounting base.
Wire the transmitter according to the terminal
label on the mounting base. Terminal layout
depends on transmitter model, so do not mix
mounting bases from different transmitter
models.
If you connect more than one transmitter to a
single 24 VAC transformer, always connect the
phase (~) to the +Vs connector in each
transmitter.
The trimmers only turn 135 degrees each way,
less than half a rotation. Do not force the
trimmer past the stopping point.

3
Transmitter Parts - Outside
Adjustment
trimmers for
measured
parameters
Service port
Locking screw for mounting base
Window
for display
Grip
for slide
Display
Locking screw for slide
Type label
Gas inlet for
CO
2
calibration
(GMW models)
CO
2
level
indicator LEDs
(GMW models)
Holes for
indicator
LEDs
EN

4
Transmitter Body
TM10 module (temperature
measurement) or
HTM10 module (temperature
and humidity measurement)
DIP switches for common
configuration options
HUMICAP 180R sensor
(humidity measurement)
Rotary switch for setting
the relay setpoint
(HMW93 and TMW93 only)
GM10 module
(CO
2
measurement)
Mounting Base
Terminal label
Orientation arrow
Opening for cable
Place for zip tie
Opening for cable
Screw terminals

5
Selecting the 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.
Plan the routing of the cable when selecting the
location. You can bring the cable to the transmitter
from above, or from the center opening of the
mounting base.
When bringing a cable through the wall,
note that the hole may also supply air from
outside the room into the transmitter. This
may affect the measurement readings. For
example, fresh concrete binds CO2 and may
cause low readings, especially in new
buildings. Seal the cable opening if
necessary.
EN

6
Opening and Closing
To open, use a screwdriver to push down the tab that
holds the transmitter cover and mounting base
together. Pull the mounting base away from the cover,
starting from the top.
To close, connect the bottom of the transmitter first,
and tilt the top forward to close the tab. Do not push
on the screen. Closing the transmitter starts it up if
power is supplied to the screw terminals.

7
Installing the Mounting Base
Use the mounting holes to attach the mounting base
securely. Use at least two screws (not included). 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.
50
34 27
Ø 4.4
33.5
30.5
29.8
59.5
EN

8
General Wiring Instructions
When wiring, observe the terminal label on the
mounting base. Maximum wire size is 2 mm2 (AWG14).
You can bring the cable
to the housing from
above or from
behind (recommended).
If you are wiring a
GMW90 series
transmitter from above,
use a < Ø 5 mm cable,
and route it from the
left side of the
mounting base.
Wiring HMW92
HMW92 is loop powered. 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
RL= 0 ... 600 Ω
Power supply
10 ... 28 VDC
RL= 0 ... 600 Ω
mA
mA
Minimum supply voltage depends on loop resistance:
10 ... 28 VDC at 0 Ω load, 20 ... 28 VDC at 500 Ω load.

9
To use a single power supply for the HMW92, connect
the positive terminals (+T and +RH) together.
-T -RH+T +RH
mA
mA
Power supply
10 ... 28 VDC
R
L
= 0 ... 600 Ω
Wiring HMW93
Recommended wiring for long cables:
-T -Vs+T +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
-RH +RH
V
V
Relay
max. 50 VDC
500 mA RL= 10 kΩmin.
3-wire connection with -Vs as common ground.
Maximum cable resistance is 2.5 Ω (24V supply,
0 ... 10 V output, relay not used).
-T -Vs+T +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
-RH +RH
V
V
Relay
R
L
= 10 kΩmin.
EN

10
Wiring TMW92
TMW92 is loop powered. Minimum supply voltage
depends on loop resistance: 10 ... 28 VDC at 0 Ω load,
20 ... 28 VDC at 500 Ω load.
-T +T Power supply
10 ... 28 VDC
RL= 0 ... 600 Ω
mA
Wiring TMW93
Recommended wiring for long cables:
-T -Vs+T +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
V
Relay
max. 50 VDC
500 mA R
L
= 10 kΩmin.
3-wire connection with -Vs as common ground.
Maximum cable resistance is 2.5 Ω (24V supply,
0 ... 10 V output, relay not used).
-T -Vs+T +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
V
Relay
R
L
= 10 kΩmin.

11
Wiring GMW93
Recommended wiring for long cables (GMW93R/RA):
T+GND -VsCO2++Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
V
R
L
= 10 kΩ min.
V
RH+
V
-Vs terminal is internally connected to GND terminal, so
you can also use the -Vs terminal as common ground.
Maximum cable resistance is 2.5 Ω (24V supply,
0 ... 10 V output):
T+GND -VsCO
2
++Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
R
L
= 10 kΩ min.
V
RH+
V
V
GMW93 is wired in the same way as GMW93R/RA,
except for the humidity output that is not present:
T+GND -VsCO
2
++Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
V
R
L
= 10 kΩ min.
V
EN

12
Wiring GMW94
-Vs terminal is internally connected to GND terminal.
Wiring for GMW94R:
T+GND -VsCO2++Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
RH+
R
L
= 0 ... 600 Ω
mA
mA
mA
GMW94 is wired in the same way as GMW94R, except
for the humidity output that is not present:
T+GND -VsCO
2
++Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
R
L
= 0 ... 600 Ω
mA
mA

13
DIP Switch Settings
Non-Metric
Td
0...5V
Relay On
Relay High
Custom
Metric
RH
0...10V
Relay Off
Relay Low
DIP
12 3 4 5 6 78
Non-Metric
Td
Custom
Metric
RH
DIP
12 3 4 5 6 78
HMW93
TMW93
HMW92
TMW92
Non-Metric
Td
0...20mA
Custom
Metric
RH
4..20mA
DIP
12 3 4 5 6 78
Non-Metric
Td
Custom
Metric
RH
DIP
12 3 4 5 6 78
GMW93 GMW94
0...5V
0...10V
DIP
Position
Setting
1
Non-metric
Non-metric units (°F).
Metric
Metric units (°C).
2
Td
Td (dewpoint) as humidity parameter.
Sets analog output scaling to -20 ... +55 °C.
Note: DIP 2 does nothing on TMW models.
RH
RH (relative humidity) as humidity parameter.
3
0...5V or
0...20 mA
Set analog output channels to 0 ... 5 V
(voltage output) or 0 ... 20 mA (current output)
0...10V or
4...20 mA
Set analog output channels to 0 ... 10 V
(voltage output) or 4 ... 20 mA (current output)
4
Relay On
Relay enabled.
Relay Off
Relay disabled.
5
Relay High
Relay closed when above setpoint.
Relay Low
Relay closed when below setpoint.
6
Not used
7
Not used
8
Custom
Configuration through service port only.
Ignores all other DIP switch settings.
DIP
Configuration by DIP switches only.
EN

14
Relay Setpoint
HMW93 and TMW93 have a rotary switch that sets the
relay setpoint if the transmitter is in the DIP mode. The
relay on the HMW93 is controlled by humidity (%RH),
on the TMW93 it is controlled by temperature.
Rotary Switch
Position
HMW93 TMW93
0
5 %RH
0 °C (32 °F)
1
10 %RH
5 °C (41 °F)
2
20 %RH
10 °C (50 °F)
3
30 %RH
15 °C (59 °F)
4
40 %RH
20 °C (68 °F)
5
50 %RH
25 °C (77 °F)
6
60 %RH
30 °C (86 °F)
7
70 %RH
35 °C (95 °F)
8
80 %RH
40 °C (104 °F)
9
90 %RH
45 °C (113 °F)
The rotary switch only has 10 positions.
Do not turn the switch so that it is between
two positions.
Other settings are possible using service port
commands. For a detailed description, see
the HMW90 series User’s Guide.

15
Transmitter Startup
When the transmitter is
powered on, it displays a
sequence of information
screens. The screens are shown
for a few seconds each.
The first screen identifies the
transmitter and the connected
measurement modules,
and shows if the transmitter
is operating normally
(status OK) or if there is an error
(status ERROR).
The following screen(s) show
the configuration of the analog
output channels and pressure
compensation setting for CO2
measurement (GMW models).
After the startup screens the
transmitter shows the
measurement screen. It shows
the measured parameters and
currently active indicators.
It is normal for CO2
measurement to read 0 ppm for
a few seconds after the startup.
EN

16
Trimmer Adjustment (RH and T)
Before starting the adjustment, compare
the reading of the transmitter to a
calibrated reference instrument so you
know how much adjustment is needed.
You can use, for example, the HM70 hand-
held humidity and temperature meter.
To enter the adjustment screen, select the
parameter to adjust, and rotate the RH or T
trimmer slightly during normal
measurement. If the trimmer is not
centered, you see the trimmer centering
screen first. Simply turn the trimmer to the
center and wait for the progress bar to
complete.
In the adjustment screen, turn the trimmer
to set the desired correction. To commit the
change, stop turning the trimmer and wait.
If you wish to apply a greater correction
than allowed by the trimmer in a single
adjustment, re-enter the adjustment screen
and apply a new correction. Corrections
applied using the trimmers are cumulative.

17
Trimmer Adjustment (CO2)
Transmitter models with CO2 measurement
have an inlet for calibration gas. Supply the
calibration gas with a known concentration
(for example, 1000 ppm) to this inlet using
a 3 mm inner diameter silicone tube and a
0.4 l/min flow.
Turn on the gas flow and wait for three
minutes for measurement to stabilize.
If you are adjusting without calibration gas,
avoid breathing on the transmitter.
You should only adjust the transmitter
when the CO2 reading is stable.
Rotate the CO2 trimmer slightly during
normal measurement. If the trimmer is not
centered, you see the trimmer centering
screen first. Simply turn the trimmer to the
center and wait for the progress bar to
complete.
In the adjustment screen, turn the trimmer
to set the desired correction. To commit
the change, stop turning the trimmer and
wait. The transmitter will show with a text
screen if the adjustment was successful, or
failed due to an unstable CO2 reading.
As with the RH and T adjustment, repeated
trimmer adjustments are cumulative. Wait
for a few minutes between adjustments to
allow the CO2 reading to stabilize.
EN

18
Indicators
MI70 connection indicator
Shown on top left of the screen if an MI70
Indicator is connected to the service port.
Alert indicator and error text
Shown on bottom of screen if there is an
error active. Followed by an error text. If
more than one error is active, the error text
will cycle through the errors.
When the alert indicator and error text are
shown, typically one or more measurement
readings are replaced with stars. This means
these measurements are affected by the
error.