Vaisala HMD60 User Manual
HMD60U/Y
HMD60U/Y-M210276en-A Operating Manual
HUMIDITY TRANSMITTER HMD60U
HUMIDITY AND TEMPERATURE TRANSMITTER HMD60Y
MOUNTING
250 (9.84)62 (2.44)
Ø 12
(0.47)
100 (3.94)
100 (3.94)
Mounting hole 82 (3.23)>>>
Mounting hole 82 (3.23)>>>
Figure 1 Dimensions of the HMD60U/Y
The HMD60U/Y humidity and
temperature transmitters are two-wire
transmitters. They are duct mounted, and
the electronics can be disconnected
without dismantling the installation.
Mount the transmitter with two screws.
Place the drilling template on the duct
surface and drill the holes as indicated.
Remember to drill an additional hole for
calibration purposes. The calibration can
be conveniently performed on site with
the HMI41 or HM70 portable indicator
equipped with an appropriate probe and
optional calibration cable.
GROUNDING
flexible wires 0.5 mm²
(AWG 20), stranded wires
recommended
3
140
165
braid
rubber
ring
brass
disks
nut
cable
25
(If the cable diameter is less
than 7mm, use a shrinking
tube or an adhesive tape)
shielding tube
braid
brass disks
D = Ø 7...10mm
Figure 2 Signal cable grounding with
bushing 18941HM
Open the lid and mount the cable
bushing set 18941HM. Do the grounding
according to Figure 2. When connecting
the signal cable to the transmitter housing,
fold the cable braid between the brass disk
in order to achieve the best EMC performance. Do not leave the bare shield of
the connected wires so that it can
shortcircuit the electronics!
2003-01-22 1
HMD60U/Y
Operating Manual HMD60U/Y-M210276en-A
ELECTRICAL CONNECTIONS
RH
TEST
Figure 3a. Electrical
connections.
RH GAIN
RH OFFSET
12 345
T
TEST
T GAIN
T OFFSET
-RH +T+RH -T
+
or
mA
mA
-
+
-
or
mA mA
Signal cables are connected to a removeable 5-pole screw connector. Make the
connections according to Figure 3a above. RH test and T test connectors are used with the
HMI41 or HM70 indicator equipped with an appropriate probe and optional calibration
cable.
Figure 3b shows the same connections in alternative way.
RH TEST
Figure 3b. Electrical
connections.
RH GAIN
RH OFFSET
1 2 3 4 5
T TEST
T OFFSET
+
RH
-
T GAIN
+
POWER SUPPLY
10...35 VDC
------------
+
RH
CHART RECORDER
AMMETER
OR CONTROLL ER
RH+T-T
------------
+
TEMPERATURE
CHART RECORDER
AMMETER
OR CONTROLLER
------------
2 2003-01-22
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