EX623 Datasheet, PDF (11/15 Pages) Extech Instruments Corporation. – 400Amp True RMS AC/DC Clamp Meter with IR Thermometer

Data Hold
To freeze the LCD reading, press the HOLD button. While data hold is active, the HOLD
icon appears on the LCD. Press the HOLD button again to return to normal operation.
MAX/MIN
1. Press the MAX/MIN button to activate the MAX/MIN recording mode. The display icon
"MAX" will appear. The meter will begins recording and displaying the maximum
value measured.
2. Press the MAX/MIN button and “MIN” will appear. The meter will display the minimum
value measured during the recording session.
3. Press the MAX/MIN button and “MAX MIN” will appear. The meter will display the
present reading, but will continue to update and store the max and min readings.
4. To exit MAX/MIN mode press and hold the MAX/MIN button for 2 seconds.
Peak Hold
When ACA or ACV is selected, pressing the PEAK button enables the peak capture circuit.
The meter will now capture and display the maximum and minimum peaks of the
waveform.
RANGE
In the Voltage, Resistance, Capacitance, Frequency or uA function the meter automatically
selects the best range for the measurements being made. For measurement situations
requiring that a range be manually selected, perform the following:
1. Press the RANGE button. The “AUTO” display icon will turn off.
2. Press the RANGE key to step through the available ranges. Observe the decimal
point and units displayed until the preferred range is located.
3. To exit the Manual Ranging mode and return to Autoranging, press and hold the
RANGE key for 2 seconds.
LCD Backlight
The LCD is equipped with backlighting for easier viewing, especially in dimly lit areas.
Press and hold the HOLD/ button for 2 seconds to turn the backlight on. The backlight
will automatically turn off after 30 seconds.
Automatic Power OFF with Disable
In order to conserve battery life, the meter will automatically turn off after approximately 30
minutes. To turn the meter on again, turn the function switch to the OFF position and then
to the desired function position.
To disable APO:
1. From the OFF position, hold the MODE button and rotate the FUNCTION switch to a
measurement function.
2.
will appear in the display
3. Release the MODE button
4. APO is now disabled (APO icon is off) and will be reset when the Function switch is
returned to the OFF position.
Low battery indication
When the icon appears in the display, the battery should be replaced. Refer to the
battery replacement procedure in the maintenance section.
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EX623 V2.2 07/08