To Next Page
R
ryanronaldNov 26, 2025
How do I resolve insufficient cooling or heating in Ametek JOFRA ATC-125 (ATC-140/156/157)?
- MMaria HolderNov 27, 2025
To fix the issue of the calibrator not cooling or heating sufficiently on Ametek Measuring Instruments (ATC-140/156/157 only), set the temperature to –50°C. On the Power PCB, measure the voltage between CN3 and CN6 terminal 1(+) and terminal 2(-) and the voltage between CN1 and CN4 terminal 1(+) and terminal 2(-). If the voltage on CN1 and CN4 is higher than 30V, replace the well and recalibrate the unit. If the voltage on CN3 and CN6 is 0.33V ±0.01V and the calibrator does not cool down sufficiently, replace the well and re-calibrate the unit. If the voltage on CN1 is less than 30V and the voltage on CN3 differs from 0.33V ±0.01V, adjust R6 until the voltage is 0.33V ±0.01V. If it is impossible to adjust the voltage on CN6, replace the Power PCB. If the voltage on CN4 is less than 30V and...
General
