Test Set CMC 156
16
What to do in case of a switching OFF due to
overtemperature?
If a thermal switching OFF occurs due to a low ohmic burden in connection
with a high ON period, one of the following messages is displayed on screen:
Overtemperature at voltage output! All V and I outputs
switched off!
Overtemperature at current output! All V and I outputs
switched off!
The most important status messages can be found in chapter 13 of the CMC
software manual.
To avoid switching OFF, the power supply voltage of the current amplifier can
be reduced. For more information, please refer to the CMC software manual,
chapter ‘System configuration’.
3.1.6 Power Supply
The following power supplies are used in the CMC 156:
a. The mains-sided power supply with power factor correction creates an
intermediate circuit voltage for the supply of the connected isolated power
supplies.
b. Auxiliary supply for the supply of the processor and of all analog circuits of
the power amplifiers.
c. Supply for the voltage amplifiers
d. Supply for the current amplifiers
e. Supplies for the two isolated binary input groups
f. Supply for the parallel SELV1 interface to the computer
g. Supply for the analog SELV interfaces for controlling additional amplifiers
1
Safety extra-low voltage.
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