Regulations for temperature calibration of experimental box-type resistance furnaces 1. Use a DC electronic potentiometer for calibration; the meter should be powered on before calibration.Vacuum heat treatment control of machining deformation of engine cast titanium casing Warm for half an hour, first calibrate the standard. 2. Place the temperature measuring instrument to be calibrated in a horizontal position, and connect the calibration circuit according to the regulations. 3. Determine the calibration temperature according to the graduation number of the temperature instrument, generally should focus on selection Commonly used temperature measurement points.Influence of brazing filler metal on vacuum brazing of titanium alloys 4. Set the DC electronic potentiometer switch S to "output", according to the measured temperature The millivolt value of the point determines the output value of the calibration meter.Failure analysis of vacuum sintered die-bonding chip peeling off 5. Toggle the key board switch to "unknown" for verification, and adjust the temperature meter of zero. 6. During daily use, no one may arbitrarily adjust the zero point of the temperature meter value.