Ada TEMPRO 550 Operating Instructions Manual page 10

TemPro 550
Backlight
Backlight is on when you turn on the unit. To turn off the backlight, press button (8) BACKLIT.
Measurement operation
Hold the meter by its handle grip and point it towards the surface to be measured. Pull and hold the trigger (4) to turn
the meter on and begin testing. Release the trigger (4) and HOLD display icon will appear on display indicating that the
reading is being held.
Distance to spot size
When take measurement, pay attention to the Distance to Spot Size. As the Distance (D) from the target surface
increases, the spot size (S) of the area measured by the unit becomes larger. The Distance to Spot size of the unit is
12:1.
This unit is equipped with a laser, which is used for aiming.
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MEASUREMENT FOUNDATION