Test purpose: This test is designed to monitor the resistance value of the thermistor and determine if it is within range of the operating specifications. Thermistors are either NTC or PTC type and their resistance values are variable depending on the temperature that they are sensing. A thermistor can either be open, shorted or operating correctly or incorrectly. In this test we are looking to determine if the resistance change in the thermistor is smooth and consistent over the increase and decrease in temperature. Although this test is not a definitive “pass / fail” or “green light / red light” the tool is automatically set up for a fast resistance capture with stable readings and ranged correctly. Once connected to a thermistor, the graphing screen will be the way to monitor output. Tool Setup: • Top Chanel: N/A • Bottom Channel: Resistance - Ranged to 10MΩ • Set Min/Max to Max • Speed: 64MS (256) or (4000 Hz 256 SMPL) Test Procedures: • Place Leads on tool to Ohms and Common • Use Probe Tips on leads or clamps • Remove the thermistor from a power source. • Connect the positive probe tip or clamp to the positive output of the thermistor • Connector the ground probe tip or clamp to the ground of the thermistor • Look for “out of range” , a “stuck” Ω value or a slightly fluctuating μΩ reading. • Set the Meter Mode to Graph • Begin to heat up the thermistor. • Watch the... (More)