INSTALLATION
Do not install the transmitter on the ceiling. Avoid placing the transmitter near heat
sources, ventilation,
76.9
123.7
9
5
5.5
24
81
127.3
77.9
60.3
59
Ø4.4 Ø4.4
32.4
20
1. Find a suitable mounting location for the transmitter. The conditions at the location
should represent well the area of interest.
NOTE
2. 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, so that air will flow through the vents
on the bottom and top.
3. Connect the wiring to the screw terminals on the mounting base. The supply voltage
and terminal assignments are model-specific; see Wiring on page 2.
4. After completing the wiring, connect the cover over the mounting base.
Vaisala INTERCAP® Humidity and
Temperature Transmitter Series HMW80
and direct sunlight.
Dimensions (in mm)
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Quick Guide ____________________________________________________________________ HMW80
-T
4...20 mA
(-5 ... +55 ºC)
-RH
4...20 mA
(0 ... 100% RH)
+T +RH
Power supply
10 ... 28 VDC
R
L
= 0 ... 500 Ω
Power supply
10 ... 28 VDC
R
L
= 0 ... 500 Ω
mA
mA
-T
4...20 mA
(-5 ... +55ºC)
-RH
4...20 mA
(0 ... 100% RH)
+T +RH
Power supply
10 ... 28 VDC
R
L
= 0 ... 500 Ω
Power supply
10 ... 28 VDC
RL = 0 ... 500 Ω
mA
mA
2 11
Pt100
t+
-T
4...20 mA
(-5 ... +55 ºC)
+T
Power supply
10 ... 28 VDC
R
L
= 0 ... 500 Ω
mA
WIRING
HMW82
You must connect the RH channel
of the HMW82, even if you only
want to measure temperature.
Connecting the T channel is optional.
HMW82P100
TMW82
HMW82P100
Includes a passive Pt100 temperature
sensor (Class F 0.1 IEC 60751) with
a 3-wire connection.
Leave the two terminals on the left
unconnected.
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Quick Guide ____________________________________________________________________ HMW80
-T
0...10 V
(0...100 %RH)
-VS+T +VS
Power supply
15 ... 35 VDC
or 24 VAC ±20%
R
L
= 10 kΩ min.
-RH +RH
0...10 V
(-5...+55 ºC)
V
V
-T -VS+T +VS
Power supply
15 ... 35 VDC
or 24 VAC ±20%
R
L
= 10 kΩ min.
-RH +RH
V
V
0...10 V
0...10 V
Recommended wiring for long cables.
3-wire connection with -VS as common
more than 2.5 Ω.
-T
0...10 V
(-5 ... +55 ºC)
-VS+T +VS
V
Power supply
15 ... 35 VDC
or 24 VAC ±20%
R
L
= 10 kΩ min.
-T -VS+T +VS
V
Power supply
15 ... 35 VDC
or 24 VAC ±20%
R
L
= 10 kΩ min.
0...10 V
Recommended wiring for long cables.
3-wire connection with -VS as common
more than 2.5 Ω.
HMW83
TMW83
ground. Not recommended if cable resistance is
ground. Not recommended if cable resistance is
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