Vaisala HMT370EX - UK (UKEX) Safety Certification Information

Equipment part Allowed ambient temperature range
Probe head HMP371 Temperature class T4:
-40 °C … +60 °C (-40 … +140 °F)
Probe head HMP373 Rubber cable version:
Temperature class T6:
-40 °C … +55 °C (-40 … +131 °F)
Temperature class T5:
-40 °C … +80 °C (-40 … +176 °F)
FEP cable version:
Temperature class T6:
-40 °C … +55 °C (-40 … +131 °F)
Temperature class T5:
-40 °C … +100 °C (-40 … +212 °F)
Temperature class T4:
-40 °C … +120 °C (-40 … +248 °F)
Probe heads HMP374, HMP375, HMP377,
HMP378, HMP378F, and HMP378H
Temperature class T6:
-70 °C … +55 °C (-94 … +131 °F)
Temperature class T5:
-70 °C … +100 °C (-94 … +212 °F)
Temperature class T4:
-70 °C … +135 °C (-94 … +275 °F)
Temperature class T3:
-70 °C … +180 °C (-94 … +356 °F)
3.7.2.1 Specific conditions of use
With the installation of the equipment in Zone 0 Group II area it has
to be ensured that sparks due to impact or friction do not occur.
CAUTION!
Wiring requirements
• Only use cables and cable glands suitable for +80 °C (+176 °F)
• 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.
• Select a strain relief option that suits the application (either use cable glands that include
strain relief or install separate clamps: see IEC 60079-14).
Chapter 3 – HMT370EX regional safety certification information
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