HMDW80 Quick Guide

HMDW80 Quick Guide
Vaisala INTERCAP® Humidity and
Temperature Transmitter Series HMW80
INSTALLATION
1.
Find a suitable mounting location for the transmitter. The conditions at the location
should represent well the area of interest.
NOTE Do not install the transmitter on the ceiling. Avoid placing the transmitter near heat
sources, ventilation, and direct sunlight.
2.
3.
4.
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.
Connect the wiring to the screw terminals on the mounting base. The supply voltage
and terminal assignments are model-specific; see section Wiring on the next page.
After completing the wiring, connect the cover over the mounting base.
Dimensions (in mm)
81
76.9
9
5
59
32.4
20
Ø4.4
123.7
127.3
Ø4.4
77.9
5.5
60.3
24
M211328EN-B_______________________________________________________________________ 1
Quick Guide ___________________________________________________________________ HMW80
WIRING
HMW82
-T +T -RH +RH
mA
4...20 mA
(0 ... 100% RH)
mA
4...20 mA
(-5 ... +55 ºC)
Power supply
10 ... 28 VDC
RL = 0 ... 500 Ω
You must connect the RH channel
of the HMW82, even if you only
want to measure temperature.
Power supply
10 ... 28 VDC
RL = 0 ... 500 Ω
Connecting the T channel is optional.
TMW82
-T +T
mA
4...20 mA
(-5 ... +55 ºC)
Leave the two terminals on the left
unconnected.
Power supply
10 ... 28 VDC
RL = 0 ... 500 Ω
HMW83
-RH +RH -T +T -VS +VS
V
0...10 V
(0...100 %RH)
V
Power supply
15 ... 35 VDC
or 24 VAC ±20%
RL = 10 kΩ min.
-RH +RH -T +T -VS +VS
V
0...10 V
V
0...10 V
(-5...+55 ºC)
Power supply
15 ... 35 VDC
or 24 VAC ±20%
RL = 10 kΩ min.
0...10 V
Recommended wiring for long cables.
3-wire connection with -VS as common
ground. Not recommended if cable resistance is
more than 2.5 Ω.
TMW83
-T +T -VS +VS
Power supply
15 ... 35 VDC
or 24 VAC ±20%
RL = 10 kΩ min.
V
0...10 V
(-5 ... +55 ºC)
Recommended wiring for long cables.
-T +T -VS +VS
V
0...10 V
Power supply
15 ... 35 VDC
or 24 VAC ±20%
RL = 10 kΩ min.
3-wire connection with -VS as common
ground. Not recommended if cable resistance is
more than 2.5 Ω.
© Vaisala 2011. All rights reserved. ______________________________________________________ 2
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