Figure 4 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.
Cable glands, conduits, and plugs are available from Vaisala as accessories (listed in Table 6
(page 18)).
Table 6 Cable lead-through accessories
Accessory Vaisala item code
Cable gland M20 x 1.5 for Ø 5 … 11 mm cable 265207SP
Cable gland M20 x 1.5 for Ø 10 … 14 mm cable 265208SP
Conduit fitting M16 265243SP
Conduit fitting NPT1/2" 265240SP
Dummy plug (Ex, 2 pcs) 254931SP
If you use lead-through accessories not ordered from Vaisala, note
the following requirements:
• The cable glands and cables used for wiring the device must not impair the Ex
protection.
• Unused lead-throughs must be sealed using Ex compliant plugs.
• The glands and plugs must be water and dust tight (minimum IP rating: IP54).
CAUTION!
HMT370EX User Guide M212305EN-B
18
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