HBM SCM-HV Guide Rapide page 21

SCM-HV
S Make sure that the ventilation openings on the side of
the QuantumX module are not covered. The SCM-HV
must not be surrounded by insulating material or simi­
lar.
WARNING
Before connecting the voltage source to be measured,
check that the SCM-HV is working. This is done with a
calibrated voltage source or by measuring the voltage of
a source in advance with a calibrated voltmeter.
S Connect the SCM to the voltage source to be mea­
sured (2). Only extend the measuring lead with mea­
suring leads approved for CAT II 300 V, or better.
The maximum permissible length of the measuring
lead including the fitted 1 m long measuring lead, is
30 m.
The measuring lead must not run through outdoor ar­
eas, either in full or in part.
S To reduce interference signals:
- Keep the length of the measuring leads as short as
possible.
- Connect the QuantumX housing to ground poten­
tial.
- Use pairs of shielded cables (ensure approval),
connect the shield to ground potential.
- Lay unshielded measuring leads close together,
channel by channel, avoid large loop areas.
- Twist unshielded measuring leads together.
- Physically separate leads for measuring sensitive,
small signals from measuring leads connected to
A3615-4.0 HBM: public
Connecting
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