4
PB
DISTURBANCE -
Objects with low emissivity or objects with a low
temperature and high emissivity, emit little infrared energy. For this reason,
measurement of these objects is affected by
infrared energy radiated from nearby objects with
high emissivity or high temperatures.
When such objects are measured in sunlight for
example, radiated energy from the sun is reflected
by the surface of the object and received by the
sensor. Use a shielding plate to block outside
infrared energy.
CALIBRATION
- Check the unit against a known
standard. If the value has drifted, press and hold
down both the
HOLD
(5) and
REC
(6) buttons. The
temperature reading and the small digits in the lower
right corner will display the same value.
Continue pressing the
HOLD
and
REC
buttons
while using the
ñ
(7) or
ò
(4) buttons to adjust the
temperature reading to your standard. The small digits
retain your pre-calibration reading. Release all buttons
when you have reached the adjusted temperature.
After releasing the buttons, the small digits will
disappear in Thermocouple or RTD modes and the
calibration is complete. In IR mode, the preset
emissivity will be displayed.
NOTES
• If the object you are measuring is covered with frost, clear the frost to
expose the object’s surface before taking the measurement.
• If the surface you are measuring is highly reflective, apply masking tape or
a paint that has a 0.95 emissivity.
• The display may fluctuate if the meter is moved during measurement.
• The unit will automatically compensate for ambient temperature.
• For the most accurate measurement, allow the unit to adjust to the ambient
temperature for about 30 minutes before use.
• When a low temperature is measured directly after a high temperature has
been measured, the display may take some time to stabilize.
Shi
eld
ing
P
lat
e
Object
°F
74
IR
74
°F
74
IR
76
°F
0.95
IR
76
