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Heinrichs Messtechnik GmbH
OPERATING MANUAL TMU / UMC3
Page 17 of 122
Environmental Conditions
Ambient temperature
− 40 °C to + 60 °C (-40 °F to 140 °F), as special version up to 80 °C (176 °F).
Special cables and cable glands are required for temperatures below − 20 °C (-4 °F) and above +70 °C (158 °F).
Storage temperature
− 25 °C to + 60 °C (-13 °F to 140 °F), − 40 °C (-40°F) available as special version.
Climatic category
In conformity with IEC 654-1. Unsheltered class D locations with direct open-air climate.
Ingress protection
Sensor: IP 67 (NEMA 6), Transmitter: IP68 / 1 m for 24 hours (NEMA 6P) acc. to DIN EN 60529 with mounted
and sufficiently tightened approved cable glands.