Required Equipment
Required Equipment
Table 1 shows the equipment required for the performance tests and calibration adjustments.
Equipment
Blackbody Calibration Source
Table 1. Required Equipment
Minimum Specifications
Temperature range: Ambient to 400 °C
Minimum aperture diameter: 76 mm (3.0 in)
Maximum temperature: ≥ 400 °C
Accuracy: ±0.5 °C to 100 °C
±0.5 % of reading above 100 °C
Recommended Model
Mikron® M315 Blackbody Calibration Source with 0.95 emissivity error correction table
Setting Up for Performance Tests and Calibration
1.Turn on the blackbody. Set it to room temperature and let it stabilize as recommended by the manufacturer.
2.Let the UUT stabilize in the calibration area environment (25 °C ±3 °C) for a minimum of 20 minutes before proceeding.
3.Verify that the UUT’s laser light is activated. When you press G, A appears in the display and the laser spot is visible. If not, turn on the laser switch located under the battery hatch.
4.Place the UUT 8” from the front of the blackbody. Center the UUT’s thermopile on the blackbody’s aperture. Note that the laser is offset from the thermopile.
Performance Tests
Use the following procedure to verify the performance of the UUT. If the UUT fails any of the tests, it needs calibration or repair.
Caution
To avoid inaccurate readings during performance tests, 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.
1.Set up the UUT and the blackbody as described under “Setting Up for Performance Tests and Calibration”.
2.The emissivity of the blackbody will be different than the emissivity of the UUT. Use the emissivity error correction table provided for the blackbody to determine the proper set point for each temperature in the first column of Table 2 at 0.95 emissivity.
3.For each temperature you determined in step 2, do the following:
a.Set the blackbody to the temperature. Let the blackbody stabilize.
b.Use the UUT to measure the temperature of the blackbody. Verify that the UUT reading is within the limits given.
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