15
The probe temperature reading should be
within ±0.5°C (±1°F) of the reference probe
reading.
Hot Temperature Verification Check
1. Follow the same procedure as above, sub-
stituting hot water (>140°F/60°C). Hot tap
water is adequate for the procedure.
2. Repeat steps two and three from above.
Note:
Due to evaporative cooling on the
surface of the hot water, it is particularly
important that the surface of the water be
continually stirred while making the IR
measurement
(Figure 11)
.
Using this method, the noncontact (IRT) chan-
nel should be considered accurately calibrated
if the reading is within ±2°C (±3.5°F) of the
reference probe’s reading; the unit’s probe
reading should be within ±0.5°C (±1°F) of the
reference probe reading.
Cautions
• Hold the noncontact thermometer outside
the rim of the cup, approximately 3 inches
from the surface of the water.
• Avoid steam condensation on the unit’s lens.
If condensation forms, carefully wipe the
lens or let it dry at room temperature and
resume measurement.
60ºC
(140ºF)
Figure 11
