3. DIMENSIONS AND PANEL FUNCTION
①
Current transducer(Jaw)
②
Jaw opening lever
③
Power switch
④
Range selector switch
⑤
Data hold switch
⑥
LCD display
⑦
Input terminal(V)
⑧
COM terminal
⑨
Input terminal(
Ω
)(
｜
)
⑩
Battery cover
○
11
Wrist strap
4. METHOD OF MEASUREMENT
4-1. Measurement of AC Current (
～
A)
4-1-1 Measurement of Line Current
①
Press the power switch "ON".
②
Set the range selector switch to the proper
ACA range to be measured.
Start the measurement at top range and
then work down to lower range.
③
Open the CT and clamp it to the conductor
to be measured at the center of CT.
Close CT completely.
④
Read the current value on the display.
⑤
If you make measurements in a dark place
or in a place where it is difficult to see the
readings, use the data hold switch. Fig.1
Note : Clamp around only one conductor of the circuit to be measured. (See Fig.1)
When making the clamp measurements for high AC current, the noise sound
of CT may be caused, however, this is not abnormal.
4-1-2 Measurement of Leakage Current
①
For leakage current measurement, clamp CT to the grounding line in the same
manner as for line current measurement.
②
This model cannot measure zero phase current accurately by clamping CT to the
plural conductors together (2 wires for single phase, 3 wires for 3 phase, etc.).
Note : The display may show some value even without clamping CT nearby the
conductor and or transformer carrying big current due to the influence of outer
magnetic fields. In such case, operate the instrument in the place apart from
the source of strong magnetism as much as possible.
