3. For ease of installation, you can disconnect the screw terminal block by pulling it out from
the component board.
4. Attach wiring to the screw terminals as shown on the wiring instructions label. See also
.
5. If you disconnected the screw terminal block, plug it back in. Make sure it is positioned
correctly.
6. Push down gently on the GM10 module. The module should be straight and firmly
connected.
7. Tighten the cable gland and close the transmitter cover (4 screws).
3.5 Wiring
With passive Pt1000 sensors the length of the cables affects the
accuracy of the measurement reading, since the connection is susceptible to
electrical interference. Vaisala recommends using shielded twisted pair cables,
with the shield grounded. When using a shielded cable, do not connect the
shield to the transmitter.
CAUTION!
Connect the wiring to the screw terminals on the mounting base. The terminal assignments are
marked next to the screw terminals. Do not connect wiring to unmarked terminals.
Note that the analog signal ground terminal is internally connected to the power supply
ground terminal.
Maximum wire size is 2 mm
2
(AWG14). Route the cable through the hole in the mounting base
if possible.
The GMW87 and GMW88 transmitters are wired either through a cable gland on
the bottom of the transmitter or an alternative lead-through on the back of the
transmitter. See
GMW87 and GMW88 transmitter parts (page 10)
.
NO
CABLES
UP
Figure 18 Routing the cable from behind (GMW83, GMW84, and GMW86 models)
Chapter 3 – Installation
27
