Fluke 68 [20/28] Backlight and laser on off switch 63

63/66/68

Infrared Thermometers

the trigger is released. However, the backlight remains on unless it

is turned off using the keypad.

Backlight and Laser On/Off Switch (63)

To turn the backlight and laser on or off, slide the backlight and

laser switch to the appropriate position. See Figure 2.

Function Button Functions (66/68)

Models 66 and 68 measure Maximum (MAX), Minimum (MIN),

Differential (DIF), and Average (AVG) temperatures each time a

reading is taken. DIF shows the difference between maximum and

minimum temperatures measured. AVG shows the average

temperature reading for each time the trigger is pulled or the unit is

locked on. This data is stored and can be recalled with

until a

new measurement is taken. See “Hold” for information on how to

recall stored data. When the trigger is pulled again, the unit will

being measuring in the last mode selected.

Pressing

also allows access to the High Alarm (HAL), Low

Alarm (LAL), Emissivity (EMS), Probe temperature (PRB-only

available when the probe is connected to the thermometer), and

Data logger (LOG). Each time

is pressed the unit advances the

function cycle. Figure 7 shows the sequence of functions in the

function cycle.