Vaisala HMD60 - Manual

HMD60U/Y
HMD60U/Y-M210276en-A Operating Manual
2003-01-22 1
HUMIDITY TRANSMITTER HMD60U
HUMIDITY AND TEMPERATURE TRANSMITTER HMD60Y
MOUNTING
Ø 12
(0.47)
250 (9.84) 62 (2.44)
100 (3.94)
100 (3.
94)
Mounti
ng
hol
e 82
(3.2
3)>
>
>
Mounting hole 82 (3.23)>>>
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.
Figure 1 Dimensions of the HMD60U/Y
GROUNDING
(If the cable diameter is less
than 7mm, use a shrinking
tube or an adhesive tape)
cable
braid
flexible wires 0.5 mm²
(AWG 20), stranded wires
recommended
D = Ø 7...10mm
3
brass
disks
25
rubber
ring
nut
brass disks
140
165
shielding tube
braid
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. W
hen connecting
the signal cable to the transmitter housing,
fold the cable braid between the brass disk
in order to achieve the best EMC per-
formance. Do not leave the bare shield of
the connected wires so that it can
shortcircuit the electronics!