Operation
Meter Power
The meter is powered by one 9V battery located in the meter handle.
Refer to the Maintenance section for replacement instructions. The
displayed battery icon provides battery status. Replace the battery as
soon as the battery status icon flashes.
Non-Contact IR Surface Temperature Measurements
The IRT227 thermometer remotely measures the surface temperature of an
object. The emissivity must be properly set to obtain optimum accuracy (see
the Emissivity section for details).
Hold the meter by the handle grip and pull (and hold) the trigger to
power the meter. Use the arrow button to select the
O
(object/surface)
mode if necessary. Scan the surfaces under test; the symbol
S
(
scan)
blinks while scanning. Refer to the Field of View section for distance-to-
target (spot) ratio considerations.
Aim the laser pointer approximately a half inch below a specific point of
interest.
o
Re
lease the Trigger; the symbol
H
will appear and the reading
(larger digits at center of display) will hold for 10 seconds, after
which the meter will automatically shut off.
p Note that the smaller digits, lower right, reflect the MIN-MAX-AVG or
DIF reading as selected in the Settings mode.
q
The meter defaults to the settings in use when the meter was last
switched OFF.
Ambient (Air) Temperature Measurements
The IRT227 can measure the temperature of ambient air using the
recessed temperature sensor located on the front of the meter next to
the laser pointer lens.
1. Pull and hold the Trigger to keep the meter powered.
2. Use the UP or DOWN button to select the A (ambient) mode.
3. Hold the meter by its handle grip in the ambient air.
