PTS 400.3 PLUS Operation Manual_R02 Page 162/306
8.7.4
URef test (option)
Verification against URef
The stability of the built-in DC-reference voltages
and of the six Analog Digital Converter (ADC)
channels can be verified by this test.
Two types of DC-standards can be connected to
the PRS 600.3.
1V Range: 0.9 V ... 1.1 V
10V Range: 9.5 V ... 10.5 V
The output of a DC-voltage standard of either nom-
inal 1V (0.9V … 1.1V) or 10V (9.5V … 10.5V) must
be connected to the NE input, first with positive,
then with negative polarity.
The time base changes to t=URef test and is syn-
chronized to the internal self-calibration cycle of
the ADC converters (approx. 4s).
All cables connected to the voltage inputs U1, U2, U3 and current inputs I1, I2, I3 and
all other cables, except the power supply cable must be removed before the connec-
tions for the URef test are made.
If the voltage and current inputs are not left open, the reference standard may be dam-
aged.
The measuring set-up should be in accordance with the connection example shown in chapter [17].
Make short connections between red and black 2mm
sockets at back of PRS 600.3.
Use adapter cable supplied:
Yellow connector -> Uout
Black connector -> COM
Connect DC - Voltage Standard 1V or 10V for positive
URef test to input NE.
The outputs of the DC-voltage standard may have names
other than Uout and COM. In this case consult the manu-
facturer’s DC-Voltage Standard user manual for connec-
tion instructions.
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