Lcd Backlight - Extech Instruments AN340 User Manual

LCD backlight
When any button is pressed, the LCD backlighting switches on for 10 seconds and then switches
OFF automatically.
Data HOLD
1. Press the HOLD button in the normal operating mode to freeze the current measurement.
2. The 'HOLD' icon will appear on the LCD display.
3. Press HOLD again to return to normal operation. The 'HOLD' icon will switch OFF and the
meter will return to displaying readings in real time.
AVG‐MAX‐MIN Mode
The AVG‐MAX‐MIN feature records the highest (MAX), lowest (MIN), and average (AVG)
readings for easy recall. The meter begins recording AVG‐MAX‐MIN values when the AVG‐MAX‐
MIN mode is started. The lower display line indicates the elapsed time of the session in
HH:MM:SS (hours, minutes, and seconds)
1. Press the AVG/MAX/MIN button momentarily. The elapsed timer will start and the MIN
value will display. The 'MIN' icon will switch ON indicating that the reading shown is the
minimum reading encountered since the mode was accessed.
2. Press AVG/MAX/MIN again to display the maximum reading encountered. The 'MAX' icon
will appear on the LCD and the reading displayed indicates the highest reading encountered.
3. Press AVG/MAX/MIN again to display the average of all reading encountered. The 'AVG' icon
will appear on the LCD.
4. Press AVG/MAX/MIN again and the display will return to displaying real time readings. The
meter will continue monitoring AVG‐MAX‐MIN values for the current session and will
continue to do so until the session is stopped by the user.
5. To stop the recording session, press the ESC button momentarily. The elapsed time
indication will switch off and the lower display digits will return to displaying the current
date and time (the 'AVG, 'MAX', and 'MIN' icons will switch OFF).
6. Note that during an AVG‐MAX‐MIN recording session, the MODE button can be used, as it
normally is, to step through the displayed measurement types.
7. Also note that the HOLD and MANUAL RECORD modes of operation are disabled during an
AVG‐MAX‐MIN session.
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