33
IM 702915-01EN
4.
Check the LED status of Junction box. It is normal if the POWER LED
and one of the RANGE LEDs are lit.
5.
Press the range up/down keys of the junction box to select the current
range (0.5 A, 5 A, or 30 A).
6.
The current waveform can be observed on the waveform measuring
instrument. The output voltage rate of the 702915 and 702916 is 10 V/
A (0.5 A range), 1 V/A (5 A range), or 0.1 V/A (30 A range), depending
on the current range selected.
Convert the voltage sensitivity of the
waveform measuring instrument to current sensitivity.
To Measure with High Accuracy
Offset voltage fluctuations of about 1 mV may occur when opening and
closing the jaws. If you want to measure with high accuracy, follow the
procedure below. At this time, if a large impact is applied to the sensor
head, the offset voltage fluctuation may increase, so operate the lever
slowly.
1.
Press and hold
DEMAG/AUTO ZERO
for about 1 second.
Demagnetization and zero adjustment are performed.
2.
Wait about 5 minutes for the offset drift to stabilize.
3.
Use the opening lever to open and close 4 or 5 times.
4.
Clamp the conductor to be measured.
5.
Short press
DEMAG/AUTO ZERO
to perform only zero adjustment
(not press and hold).
6.
Measure the current.
Note
• The offset drift may be large immediately after starting to supply
power due to instrument’s self-heating and other effects, but it will
stabilize for the most part in about 30 minutes.
• The offset voltage will drift due to the ambient temperature or the
like, so careful attention is required when performing continuous
measurement.
3. Operation Procedure
