Main Connection - Hach POLYMETRON 9125 Operator's Manual

Transmitter 9125 – Conductivity / resistivity measurement

Main connection

Page 20
Electrical connection should be performed only by
qualified personnel. For the base model, the power
supply accepts 100-240 VAC
without changes in configuration. Before switching the
transmitter, make sure the site voltage corresponds to
the instrument voltage indicated on the identification
plate. The terminal block for power connections can be
lifted from its header for easier installation.
For safety reasons, it is required to observe the
precautions below :
Use a three wire mains supply cable (2 core + PE)
with a cross section between 0.35 and 2 mm²
(AWG 22 to 14) rated at 105°C minimum. The
external cable insulation should be cut as close as
possible from the terminal block.
The instrument should be connected to the power
supply by means of a breaker located close to the
instrument and be identified. The supply shall be
fitted with an overcurrent protection device rated at
20 Amp maximum.
This breaker should switch off phase and neutral in
case of electrical problems or when the user wish
to service the instrument. However the power
supply earth must always be connected.
Cabling should be specified for a minimum of 80°C
(176°F).
Note :
Before servicing the instrument, ensure that the
power supply is switched off.
10 %, (50/60 Hz)