Ac Current Measurement - Mastech MS2225A Operation Manual

4.15 AC current measurement

Electric shock.
Remove the probe from the meter before measuring
with the current clamp.
1) Turn the change-over switch to AC current gear. At this
time, the meter is in AC current measurement state, and
then the suitable range shall be selected.
2) Hold the trigger, and open the clamp to clamp one
conductor of measured circuits.
3) Read the current value from LCD display.
Note:
1) If two or more circuits of the measured circuits are
clamped, the measurement result will be not correct.
2) In order to acquire the accurate reading, the measured
conductor shall be in the center of clamp as far as
possible.
3) " " means that the maximum AC input current is




1000 A.
4) When the reading is greater than 600.1 A at 60 A/600 A,




there will be the alarm sound "beep" from the meter.




When the reading is greater than 620 A rms, the ACA will




display overload.
5) When the reading is greater than 1001 A at 1,000 A,




there will be the alarm sound "beep" from the meter.




When the reading is greater than 1,100 A rms, the ACA




will display overload.
WARNING
26
Figure 1 Schematic Diagram for Current Measurement at AC Gear
27