Data Hold; Display Backlight Key; Lowbat (Low Battery) Screen - Extech Instruments PQ3450-2-NIST User Manual

5.7 Data Hold Function
1. During a measurement, press the HOLD KEY once, the displayed readings will
freeze and the display will show the "HOLD" icon on the bottom right side of the
screen
2. Press the HOLD key again to release the display and return to the normal operating
mode. The HOLD display icon will switch off
5.8 LCD Backlight Key
Press to turn the backlight ON or OFF. Note: Use of the backlight will place a higher
burden on the battery power. The backlight should be turned off when using battery power
and especially while datalogging.
5.9 Low Battery Indication (LOW BAT)
When the LOW BAT indicator appears, replace the batteries as described in the Battery
Replacement section of this manual. Use of weak batteries will compromise measurement
accuracy and meter performance.
The HOLD display
Low Battery indication
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