Page 988 - techequipmentscatalogue2016
P. 988
UKE ®
Measuring
Id Jdistance
Manufacturer
recommended
large target
IR thermometer
spot size
Smaller target
= IR thermometer field of view
To perform the test: • Emissivity makes a big
difference in infrared
T Allow at least 15 minutes for the IR thermometer to reach the temperature measurement.
temperature of the shop or laboratory.
• The temperature and
~2 Set the radiation source to the desired calibration temperature. emissivity of the 4180
Depending on the temperature range a low, high, and midpoint and 4181 are calibrated
radiometrically for the
temperature may be chosen. most reliable and
traceable results.
If the infrared thermometer has an emissivity setting, it should be set to
match the calibrated emissivity of the source. • The Fluke 4180 and 4181
can be set to match the
Position the infrared thermometer at the manufacturer's recommended emissivity setting of fixed
emissivity thermometers.
4 calibration distance.
• The large area of the 4180
Center the infrared thermometer on the calibrator surface. Do this by and 4181 target allows
infrared thermometers
5 adjusting the aim slightly side to side and up and down to maximize to be calibrated at the
the signal. recommended distance
without including
~6 The measurement time should be ten times longer than the infrared unwanted surfaces in the
thermometer's response time. This is typically five seconds for Fluke field of view.
infrared thermometers.
• Use a mounting device such
Record the calibrator indicated reading and the indicated reading of as a tripod to maintain the
calibration distance.
7 the thermometer under test to determine the error and tolerance status
of the thermometer at each set point. Measure the calibration
distance from the flat plate
T Repeat for the other set point temperatures. surface to the surface of
the front housing of the
infrared thermometer.
982 www.tech-equipments.comlsales@tech-equipments.com
Measuring
Id Jdistance
Manufacturer
recommended
large target
IR thermometer
spot size
Smaller target
= IR thermometer field of view
To perform the test: • Emissivity makes a big
difference in infrared
T Allow at least 15 minutes for the IR thermometer to reach the temperature measurement.
temperature of the shop or laboratory.
• The temperature and
~2 Set the radiation source to the desired calibration temperature. emissivity of the 4180
Depending on the temperature range a low, high, and midpoint and 4181 are calibrated
radiometrically for the
temperature may be chosen. most reliable and
traceable results.
If the infrared thermometer has an emissivity setting, it should be set to
match the calibrated emissivity of the source. • The Fluke 4180 and 4181
can be set to match the
Position the infrared thermometer at the manufacturer's recommended emissivity setting of fixed
emissivity thermometers.
4 calibration distance.
• The large area of the 4180
Center the infrared thermometer on the calibrator surface. Do this by and 4181 target allows
infrared thermometers
5 adjusting the aim slightly side to side and up and down to maximize to be calibrated at the
the signal. recommended distance
without including
~6 The measurement time should be ten times longer than the infrared unwanted surfaces in the
thermometer's response time. This is typically five seconds for Fluke field of view.
infrared thermometers.
• Use a mounting device such
Record the calibrator indicated reading and the indicated reading of as a tripod to maintain the
calibration distance.
7 the thermometer under test to determine the error and tolerance status
of the thermometer at each set point. Measure the calibration
distance from the flat plate
T Repeat for the other set point temperatures. surface to the surface of
the front housing of the
infrared thermometer.
982 www.tech-equipments.comlsales@tech-equipments.com
