Vaisala HMT370EX Guide D'installation page 17

CAUTION!
minimum voltage in all conditions, measured at the transmitter screw terminals.
If the supply voltage is less than 12 VDC, the analog output current can be
erroneous.
It is recommended to use ferrules on the stripped wires to help ensure a secure
connection with the screw terminals.
Lead-through selection and default plugs
HMT370EX comes delivered with 2 different plug types on the transmitter lead-throughs, as
shown in Figure 3 (page
1
Figure 3 Default plugs in HMT370EX lead-throughs
1 Removable plastic transport cover: must be replaced (fold sides of transport cover
together and pull out)
2 Metal sealing plug: can be used in final installation
The plastic transport cover (1) must always be replaced with an Ex compliant cable gland,
conduit, or seal when wiring HTM370EX. The metal sealing plug (2) can be left in place and
used in the final installation, if the right-hand lead-through is not used. For cable gland and
conduit options, see HMT370EX User Guide.
Ensure that the transmitter is powered correctly. 12 VDC is the
13).
Chapter – Installation and wiring
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