Measuring Method; Normal Measurement Of Current; Measurement Of Balance Leakage Current - IDEAL 61-920 Mode D'emploi

7. Measuring Method

• Never make measurements on a circuit in which the electrical potential exceeds 300VAC.
• Transformer jaws are made of metal and their tips are not completely insulated.
Guard against the possible shorting where the equipment under test has exposed metal parts.
• Do not use the instrument in the presence of flammable gas, dust or vapor.
• Never make measurements with battery cover removed.
• Do not measure currents over 30A. Transformer jaws may overheat, causing a fire, deforming .
of plastic parts or degrading of insulation. If "
immediately and remove the instrument from the conductor under test.
• Take sufficient care not to apply shock, vibration or excessive force to the jaw tips. Otherwise,
precisely adjusted transformer jaws will be damaged.
• This instrument performs self-calibration for about 3 seconds when it is turned on. ("
displayed on the LCD.) Do not clamp onto any conductor or open the jaws during this
procedure. Inaccurate measurements may occur.
• For accurate measurements, ensure that the jaw tips are free from foreign substances, align
properly, and fully close. Do not release the jaw trigger abruptly or attempt to close the
transformer jaws by applying external force.
• The jaw opening allows for a maximum conductor diameter of 1.25". Accurate measurements
cannot be made on a larger conductor since the jaws will not fully close. Never attempt to
apply excessive force to close the jaws.
• When measuring large current, the transformer jaws may buzz. This is normal and has no
effect on the instrument's performance or safety.
• The instrument's transformer jaws are highly sensitive. Because of the characteristics of the
transformer jaws, it is impossible to eliminate the interference of an external magnetic field
completely. If there is a large magnetic field nearby, the display will not zero before clamping
onto a conductor. In this case, use the meter at a location as far as possible from the magnetic
field. Typical generators of magnetic fields include conductors with large currents flowing,
motors, electromagnetic equipment, integrated wattmeters.
DANGER
" is displayed on the LCD, stop measuring
CAUTION
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7.1 Normal measurement of current

* Press the Function button
* Confirm the displayed unit is " mA", and the " MEM" mark is not displayed at the upper left
corner of the LCD.
* Press the lever to open the transformer jaws and close them over a single conductor.
* The measured current value is then displayed on the LCD. (Earth leakage current that flows
through a ground wire can also be measured by this method.)
" is
7.2 measurement of Balanced leakage current
* Press the Function button
* Confirm the displayed unit is " mA", and the " MEM" mark is not displayed in the upper left
corner of the LCD.
* Clamp onto all conductors except the earthed wire.
* The measured current value is displayed on the LCD.
Single-phase 2-wire system
In 3-wire system with neutral, clamp onto
and select the ACA function.
and select the ACA function.
In 4-wire system with neutral, clamp
all 3 wires.
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Three-phase 3-wire system
onto all 4 wires.