MA120 Datasheet, PDF (4/5 Pages) Extech Instruments Corporation. – 200A AC/DC Mini Clamp-on Meter

Operation
AC Current Measurements
1) Set the Function switch to the ACA range.
2) Press the jaw trigger and clamp around, fully enclosing a single
conductor. Do not allow a gap between the two halves of the jaw.
Refer to the diagram at right for the correct way to enclose a single
conductor.
Yes
3) Read the ACA value on the LCD.
No
DC Current Measurements
1) Set the Function switch to the DCA range.
2) Press the ZERO key to null the meter display.
3) Press the Trigger to open the current sense Jaw.
4) Fully enclose the conductor to be measured. Do not allow a gap between the two
halves of the jaw.
5) Read the DCA value on the LCD.
Non-Contact AC Voltage Detection
WARNING: Risk of Electrocution. Before use, always test the Voltage Detector on a
known live circuit to verify proper operation
1) AC Voltage detection operates on any of the four Function switch positions.
2) Touch the probe tip to the hot conductor or insert into the hot side of the electrical
outlet.
3) If AC voltage is present, the detector light will illuminate.
NOTE: The conductors in electrical cord sets are often twisted. For best results, slowly
slide the probe tip along a length of the cord to assure placing the tip in close
proximity to the live conductor.
NOTE: The detector is designed with high sensitivity. Static electricity or other sources of
energy may randomly turn the detector light on. This is normal operation
Frequency Measurements
1) Set the Function switch to the Hz position.
2) Fully enclose the conductor to be measured. Do not allow a gap between the two
halves of the jaw.
3) Read the Frequency value on the LCD.
Flashlight
Press and hold the top button to turn the flashlight on. Release the button to turn the
flashlight off.
Data Hold
To freeze the current reading on the LCD, press the “Hold / Backlight” key. The word HOLD
will appear on the LCD while the meter is in the Data Hold mode. To release the Data Hold
function and return the meter to normal operation, press the “Hold / Backlight” key again. The
word HOLD will switch off.
4
MA120 Ver. 1.2 10/2004