GE CTR 80 User Manual

• Set the set-point to 50°C and allow adequate time for the bath to reachthis temperature and stabilize. Adjust the DELTA calibration parameter(see Section 9.11.4) to make the bath temperature as measured with thestandard thermometer match the set-point. The approximate ratio betweena change in DELTA and a change in temperature at 50°C is about 4.0 to 1.For example, if the bath temperature is high by 0.1°C at 50°C then de-crease DELTA by 0.4.• Set the set-point to –70°C and allow adequate time for the bath to reachthis temperature and stabilize. Adjust the BETA calibration parameter(see Section 9.11.5) to make the bath temperature as measured with thestandard thermometer match the set-point. The approximate ratio betweena change in BETA and a change in temperature at –70°C is about –1.0 to1. For example, if the bath temperature is high by 0.1°C at –70°C then in-crease BETA by 0.1.5411 Calibration Procedure