Model 407820 Version 3.0 August 2005
5
Data Hold
1. Press the HOLD button to freeze the displayed reading. The LCD will display
the icon 'HOLD' when Data Hold is engaged.
2. Press the HOLD button to de-activate this feature. The 'HOLD' icon will
switch off.
3. Note that Data Hold is not available while the meter is in the Max/Min Record
mode.
Peak Hold
1. Press the PEAK button to activate the Peak Hold feature. The LCD will
display 'PEAK' when Peak Hold is engaged.
2. The meter will now display only the highest reading. Each time a higher
reading is encountered the LCD will update.
3. Press the PEAK button to de-activate this feature. The 'PEAK' icon will switch
off.
4. Note that Peak Hold is not available while the meter is in the Max/Min Record
mode.
RECORD / RECALL and Max/Min Data Recording
The Max/Min feature stores the maximum reading and minimum reading while
the user takes measurements. The Max and the Min readings can later be
recalled.
1. Press the RECORD/RECALL button to activate this feature. The LCD will
display the ‘REC’ icon and the meter will begin monitoring the highest (Max)
and lowest (Min) readings.
2. After measurements are made, press the button again to view the Max
reading. The ‘MAX’ icon will appear on the LCD along with the highest
reading.
3. Press again to view the minimum (MIN) reading. The 'MIN' display icon will
appear on the LCD along with the lowest reading.
4. To exit this mode, press and hold the RECORD / RECALL button until the
‘REC’ indicator switches off. Note that exiting this mode clears the MAX and
MIN values.
RS-232 PC Interface
The optically isolated RS-232 PC Interface port is located on top of the meter
next to the sensor jack. A Data Acquisition Software package that includes
Windows
TM
software and a meter-to-PC interface cable can be obtained from
Extech or an authorized distributor. The Part Number for the kit is 407001.
Instructions for use are supplied with the kit.
