General Tools and Instruments IRT656 - Manual (Page 3)

Auto Power Off: Automatically after approx. 6 seconds
Emissivity: Fixed at 0.97
°F/°C Switchable: YES
Backlight: YES
Laser Sight Switchable: YES
Audio Alarm: YES
Dimensions: 6.69" x 5.23" x 1.77" (170 x 133 x 45mm)
Battery Type: “9V” battery
Battery Life: 16 hours
Weight: 5.8 oz. (163 g) Approx.
Accessory: “9V” battery, Instruction Manual,
Soft Carrying Case
OPERATIONS OF INSTRUMENT
QUICK START:
To measure a temperature, point the unit at the target that
you want to measure, pull the measuring trigger and hold. In
SCAN mode, the LCD displays either the current temperature
in Celsius or Fahrenheit.
The unit will HOLD the last reading for about 6 seconds after
the trigger is released; the word HOLD appears.
Be sure to consider the target area that is inside the angle of
vision of this instrument.
The single spot of laser is used for aiming only.
UNIT DIAGRAM:
LCD DISPLAY:
°F/°C AND BATTERY
CHANGE:
The unit is powered by
“9V” battery and displays
temperature in either
°F/°C. The user has to
replace the battery when
the battery voltage drops
below the voltage for
reliable operation and
at the same time the
low battery symbol will
appear. To change the
“9V” battery, pull and open the unit’s handle by using the
finger. Change the “9V” battery with a new one and push the
battery cover back in place.
TECHNIQUES OF INFRARED THERMOMETER:
FIELD OF VIEW (FOV) RATIO =
DISTANCE TO DIAMETER (DS) RATIO
The field of view is the angle of vision at which the
instrument operates and it is determined by the optics of the
unit. The FOV is the ratio of the distance from the target to
the target diameter. The smaller the target, the closer you
should be to it. When the target diameter is small, it is
important to bring the
thermometer closer to
the target to insure that
only the target is
measured, excluding
the surroundings.
Display
Screen
Scan/Hold mode
indication
Laser on/off indication
Low battery
°F/°C indication
Temperature
indication
°F/°C switchable
Laser On/Off
“9V” battery
Laser
Sighting
Measuring
Window
Measuring
Trigger
Battery
and Cover
IRT656 Manual -2P-043008:Layout 1 4/30/08 2:46 PM Page 3