Display Backlight; Auto Power Off; Low Battery Indication; Wrong Connection Indication - Extech Instruments 450 User Manual

DISPLAY BACKLIGHT

Press and hold the
display backlight function. The backlight will automatically turn
off after 30 seconds.
MAX
Press the MAX button to activate the MAX feature in the voltage
or current functions. The display will hold the maximum reading
and will update only when a reading higher then the currently
displayed reading occurs. Press the MAX button again to
disable the feature.
HOLD
The hold function freezes the reading in the display. Press the
HOLD key momentarily to activate or to exit the hold function.

AUTO POWER OFF

The auto off feature will turn the meter off after 15 minutes.

LOW BATTERY INDICATION

The icon will appear in the lower left conner of the display
when the battery voltage becomes low. Replace the battery
when this appears.

WRONG CONNECTION INDICATION

The icon will appear in the upper right conner of the
display and the buzzer will sound whenever the positive test
lead is inserted into the 20A or uA/mA input jack and a non-
current (green, black or red) function is selected. If this occurs,
turn the meter off and reinsert the test lead into the proper input
jack for the function selected.
button for >1 second to turn on or off the
15 EX450V5.0V 10/06