Calibrating The Temperature - PerkinElmer PTP-1 User Manual

Calibrating the temperature

If the temperature achieved in the cell, measured using a calibrated thermometer, does not
match the setpoint read out on the PTP, the temperature can be recalibrated as follows.
1. Using the setpoint control mode (page 41), set the temperature to 0 °C and allow to
stabilize.
2. Read the temperature on a calibrated thermometer, inserted in a cell of water in the cell
holder.
3. Record this value for use in parameter P-03 (Offset).
4. Exit the setpoint control mode.
5. Enter the configuration parameter P-03 (Offset) into the system as described in
the parameters
.
The offset is the correction needed to bring the temperature back to zero. For example,
if the calibrated thermometer shows 0.5 °C and P-03 is currently at zero, reset this
value to 0.5.
6. Using the setpoint control mode, set the temperature to 100 °C and allow to stabilize.
7. Read the temperature on the calibrated thermometer again.
8. Record this value for use in parameter P-04 (Gain).
9. Exit the setpoint control mode.
10. Enter the configuration parameter P-04 (Gain) into the system.
For example, if the calibrated thermometer shows 99.5 °C and P-04 is currently at
1.000, reset this value to 0.995.
11. Re-check the reference temperatures 0 and 100 °C and re-calibrate if necessary.
Configuration and Maintenance . 49
Setting