Max (Maximum) Temperature Display; Backlight; The Mode Button Options - Extech Instruments 42509 User Manual

MAX (maximum) temperature display

The highest reading encountered during a single measurement scan is displayed in the
MAX display

Backlight

1. Press and release the Trigger
2. While HOLD is on the display, press the backlight button
backlight on or off.
3. The backlight will illuminate in the LCD when the feature is enabled.
4. The status of the backlight will be stored in memory and will remain as the "turn-on"
condition until changed.
5. Note: The backlight will shorten the battery life. Only use this feature when required.

The MODE button options

The MODE button is used to access the Emissivity, Lock, High alarm and Low alarm
features of the instrument.
1. Press and release the Trigger
2. While HOLD is on the display, press the MODE button to step through and program the
following features. A blinking icon indicates the feature is selected.
3. The meter will shut off and save any changes if no button is pressed for approximately
8 seconds.
E
= (Emissivity Value)
Press the ▲ or ▼ buttons to change the emissivity value.
(Lock mode On/Off)
Press the ▲ or ▼ buttons to turn the lock feature ON or OFF.
(High Alarm On/Off)
Press the ▲ or ▼ buttons to turn the High Alarm feature ON or OFF.
(High Alarm setting)
Press the ▲ or ▼ buttons to set the high alarm limit value in the main display
(Low Alarm On/Off)
Press the ▲ or ▼ buttons to turn the High Alarm feature ON or OFF.
(Low Alarm setting)
Press the ▲ or ▼ buttons to set the Low alarm limit value in the main display.
once to turn on the
5 42509 V1.0 07/09