Why does my Fluke 1523 Thermometer show incorrect resistance?
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Richard GrayDec 1, 2025
If the display of your Fluke Thermometer shows an incorrect or erratic resistance value, it could be due to several reasons. First, ensure the probe wires are correctly connected to the terminals. An incorrect connection is a common mistake. Also, examine the sensor and lead wires for any signs of damage, shorts, or open circuits using a digital multimeter. Check for any conductivity between the leads and the probe sheath. Use a high-quality sensor to minimize errors from drift, hysteresis, or insulation leakage. Ensure the probe stem is immersed deeply enough in the medium with a tight fit to avoid stem conduction errors. Finally, electrical interference from nearby radio frequency radiation can cause erratic readings; try to eliminate the source or move the thermometer to a different loc...