Calibration Adjustments - Fluke 65 Calibration Information Manual

Model 65
Calibration Information
Temperature at 0.95 Emissivity
Room temperature
200 °C (392 °F)
300 °C (572 °F)
400 °C (752 °F)
Room temperature must be 25 °C ±3 °C (77 °F ±5 °F).
1.
Limits given are ±2 % of temperature at 0.95 emissivity.
2.

Calibration Adjustments

The Model 65 Infrared Thermometer should be calibrated and, if necessary, adjusted annually using the
following procedure:
To avoid inaccurate readings during calibration, expose the UUT to the
blackbody heat source only long enough to complete the measurement
(< 15 seconds). Between measurements, move the UUT to an area not affected
by the heat source.
Do not make any calibration adjustments when UUT is in factory calibration
mode (refer to Figure 2). Doing so will cause the UUT to give inaccurate
readings, and you will need to return the UUT to a Fluke service center for
recalibration.
1. Turn on the UUT.
2. Press and hold Fand D until all display segments are lit (about 5 seconds); then also press and hold
Eand G until the UUT displays 1_L (about 5 seconds), as shown in Figure 2. To scroll the calibration
menu, press F or D.
3. Set up the UUT and the blackbody as described under "Setting Up for Performance Tests and
Calibration".
4. In the room-temperature adjustment mode (display shows 1_L), press G. The default room temperature
appears on the UUT display.
5. Verify that the UUT thermopile is centered on the blackbody target; then use F or D to adjust the UUT
reading down or up, respectively, to match the room temperature reading at 0.95 emissitivity.
6. When you have set the UUT reading to room temperature at 0.95 emissivity, press G. The UUT display
flashes briefly, then returns to the calibration selection mode.
7. Use the emissivity error correction table to adjust the blackbody for an output of 350 °C at 0.95
emissivity.
6
Table 2. Performance Test Values
Caution
Caution
UUT Reading Limits
Room temperature ±2 °C (±3.6 °F)
196 °C to 204 °C (384.8 °F to 399.2 °F)
294 °C to 306 °C (561.2 °F to 582.8 °F)
392 °C to 408 °C (737.6 °F to 766.4 °F)
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