Extech Instruments 38394 User Manual page 5

Digital ac/dc clamp meter
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OPERATING INSTRUCTIONS
AC/DC Current Measurements
WARNING: Ensure that the test leads are disconnected from
the meter before making current clamp
measurements.
1.
Set the Function switch to the 600A range.
2.
Press the FUNC key to select AC or DC (the AC/DC icons
will toggle on the LCD with each key press).
3.
Press the trigger to open jaw. Fully enclose one conductor
to be measured.
4.
The clamp meter will display the reading and automatically
select the proper range
Note: When the meter is set to the DCA mode (clamp jaws
empty), the meter's display may indicate an offset reading, this
is normal. For best results, use the RELATIVE procedure to
zero the meter before taking DCA measurements.
AC/DC Voltage Measurements
1.
Set the Function Switch to the V position.
2.
Press the FUNC key to select AC or DC Voltage. The meter will display the
selected unit of measure (AC or DC) on the left side of the LCD.
3.
Insert the black test lead to the COM input jack and the red test lead to the V jack.
4.
Connect the test leads in PARALLEL with the circuit to be measured.
5.
Read the displayed measurement value on the LCD display.
Manual Range
This meter automatic selects the range. However, the range can be manually held and
selected. To manually hold the range, momentarily press the RANGE key the
appropriate number of times to select the desired range. The units of measure and
decimal positioning will change with each press of the RANGE key.
Resistance Measurements
CAUTION: Before taking an in-circuit resistance measurement, remove power from the
circuit under test and discharge all capacitors.
Insert the black test lead to the COM input jack and the red test lead to the Ω input
1.
jack.
2.
Set the Function switch to the •)))
to display the Ω icon.
3.
Connect the test leads to the device under test and read the measured value on
the LCD display.
Ω position, press the FUNC key if necessary
38394 V3.3 8/08
5
www.burntec.com
www.burntec.com

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