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5 OPERATING INSTRUCTIONS
5.3 Manual control
application examples
Important
Read and comply with the safety instruc-
tions "2 Safety" on page 8.
Always comply with local safety regula-
tions.
Note
The circuitry for safe discharge of inductive
loads is activated in Manual Control as well
as in the winding resistance app. Discharge is
performed via the current output and the R1/
R2 voltage measurement inputs.
Resistance measurements
1]
Press
2]
Select a DC current generator 1, 16 or 100 A
output (pending the resistance of the test
object. Max resistance is about 10 kΩ when
generating 5 mA from the 1 A generator).
Recommended test current ranges
1 A
5 mA – 1 A
generator
16 A
1 A – 16 A
generator
100 A
10 A – 100 A
generator
3]
Press
4]
Select "R" > "R1" > "DC"
5]
Select "Int" > "Gen I" > "DC".
6]
Press "OK".
7]
Press
26
TRAX
Resistance range
1 mΩ – 10 kΩ
Resistance range
160 μΩ – 50 Ω
Resistance range
10 μΩ – 5 Ω
ZP-AJ01E
8]
Select resistance calculation "R DC (Ω)" using
"R1" and "Gen I".
9]
Connect current and voltage sense leads to
the test object.
Note
This is a 4-wire method. Connect voltage
sense leads "inside" the current leads connec-
tors. The connectors must NOT touch each
other.
10]
Select an appropriate test current suitable
for the test object.
Always use as high current as possible but
avoid unintentional heating of the test object.
11]
Press
12]
Wait for results to stabilize.
13]
Press
and read the results.
Note
Manual Control is not designed for resistance
measurements on inductive loads e.g. trans-
former windings. If Manual Control is used
for this, manual setting with small and slow
adjustment of test current should be used. For
measuring highly inductive loads, e.g. trans-
former windings, the winding resistance app
should be used.
Note
For measuring high resistances it is possible to
use a simplified 2-wire technique. Connect the
1A DC outputs directly to the R1 inputs and
connect from R1 inputs to the resistor. Please
observe that maximum compliance voltage is
about 50 V so select a very low current when
measuring in the kΩ range.
Excitation current (impedance)
measurements
1]
Select 0-250 V or 0-2200 V generator pending
the expected saturation voltage of the test
object.
2]
Select "Gen I" and "Gen U" measurement
channel set to frequency to measure the ex-
citation voltage and current and use the data
for calculations.
AJ0383DE
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