Seaward IRT 1557 - Manual (Page 18)

IRT1557
Operating Instructions
- 18 -
7 Environmental Conditions
7.1 The IRT 1557 has been designed to perform tests
and measurements in a dry environment.
7.2 Operating Altitude 0 to 2000 metres
7.3 Overvoltage category IEC 60664/IEC 61010,
300V Category IV,
600V Category III.
1000V Category II.
7.4 Pollution degree 2 according to IEC 61010-1.
7.5 Protective system IP40 according to IEC 60529.
7.6 Electromagnetic compatibility (EMC). Interference
immunity and emitted interference conforming to
IEC 61326-1.
7.7 Operating temperature range of 0°C to 40°C,
without moisture condensation.
7.8 The IRT 1557 can be stored at any temperature in
the range -25°C to +65°C (relative humidity up to
90%). The batteries should be taken out of the
instrument for storage.