- 1). Clean the TPI 373 with a damp cloth, paying close attention to the optical lens. A dirty lens alters the captured light quality and can result in an incorrect reading.
- 2). Look for a low battery charge indicator on the TPI 373's screen. Replace the unit's 9-volt battery when this indicator lights up.
- 3). Program the black body calibrator to emit a temperature calibration signal at 73.4 degrees Fahrenheit.
- 4). Hold the TPI 373's optical lens eight inches from the black body calibration unit's emission panel. Activate the black body calibrator. Take a reading with the TPI 373. Repeat this step up to five times. Verify the measured temperature falls within a range of 70 to 77 degrees Fahrenheit. Turn off the black body calibrator.
- 5). Using a surface probe thermometer, take a reading of a secondary heat source's temperature. Measure the same place on this secondary source with the TPI 373. Verify the TPI 373's measurement is within 2 percent of the surface probe's measurement. The unit is now calibrated.
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