wtw CL 298, Руководство по эксплуатации

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Installation
pH 298, LF 298, Oxi 298, Cl 298
10
ba77196e03 07/2018
3 Installation
3.1 Scope of delivery
The following parts are included in the scope of delivery:
 a measuring transmitter of the series 298 (e.g. pH 298, LF 298, Oxi 298,
Cl 298)
 Option:
Mounting plate with preassembled measuring transmitter
 Operating manual.
3.2 Basic principles of installation
3.2.1 Requirements of the measurement location
The measurement location must meet the environmental conditions specified in
section 9 T
ECHNICAL DATA
.
The measuring transmitter is designed for operation in an environment
protected against moisture.
3.3 Safety requirements of the electrical installation
Electrical equipment (such as motors, contactors, cables, lines, relays,
switches, instruments) must meet the following requirements:
 Compliance with national regulations (e.g. NEC, VDE and IEC)
 Suitability for the electrical conditions at the place of installation
– Maximum operational voltage
– Maximum operating current
 Suitability for the ambient conditions at the place of installation
– Temperature resistance (minimum and maximum temperature)
– Protection against water and dust (Nema or IP type of protection).
 Suitable fuse protection of the electrical circuit
– Overcurrent protection devices
(according to the technical data of the instrument input or output)
– Overvoltage limitations of overvoltage category II
 Suitable external separator (e.g. switch or circuit-breaker) for the power sup-
ply of permanently installed instruments with separate power connection
– compliant with the following regulations
- IEC 60947-1
- IEC 60947-3