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of 148
Note
Dry-circuit measurement in accordance with DIN IEC 512 Part 2:
Dry-circuit measurements and the 20 mV technique are always used for testing switches and plugs which
operate at low voltages.
To verify the proper transfer of signals by plugs and switches, any extraneous layers which have formed must
not be allowed to decompose during the measurement.
DIN IEC 512 Part 2 stipulate a maximum test voltage of 20 mV.
In the 20 mV mode, the total resistance of the test object and the lines connected to it must amount to at
least 200 m
Ω
.
If this value is fallen short of, the measurement current becomes too high and the RESISTOMAT®
model 2329 outputs an error (current transmitter overloaded!). As the resistance increases, the measurement
current drops and the measured results become more uncertain, as the load on the A/D converter decreases.
The analog output cannot be used in the 20 mV mode (refer to measurement errors in chapter. 5.1.3).
Only one measuring range is available for dry-circuit measurements.
Only the display format is switched in accordance with the internal measurement resolution.
Specifying the number of
CONV
ersions
for the A/D converter
The [
→
] and [
←
] cursor keys are used to set one of the following values:
MINIMUM
Lowest number of conversions.
MEDIUM
2nd lowest number of conversions.
STANDARD
2nd highest number of conversions.
MAXIMAL
Highest number of conversions.
ITEST
Measurement current monitoring (continuity tester)
Note
This RESISTOMAT® model 2329 is equipped with a very fast AD converter whose conversion time can be
adjusted over 4 stages.
The conversion time of each stage depends on the selected measurement range and resolution (refer to the
measurement rate in chapter. 5.1.4)
Specifying the
MEAS
urement
PROCedure
The [
→
] and [
←
] cursor keys are used to select one of the following options:
REF-COMP
Zero measurement for compensation of thermoelectric potentials.
NO COMP
No zero measurement (the values of the reference measurement are used).
SINGLE COMP A zero measurement is only performed once at the start.
STANDARD
A zero measurement and a measurement with I or U are performed alternately.
I-Test
Measurement current monitoring (continuity tester).
Note :
W
W
W
W
t
I
Standard procedure
Start
Zero measurement
with interruption
current circuit
Cable rupture
test
On single shot
measurement current
at zero on repeat
measurement repetition
of the whole expiration
Measurement
