Teledyne GC-Pro/FID - Gas Chromatograph - Manual (Page 67)

GC-Pro FID Operation
Teledyne Analytical Instruments 53
setpoint limits. The screen also displays the date and time of the
thermocouple data acquisition. The values are updated every five
seconds.
4.7.7.2 S ETTINGS
To redefine the limits and offset for the thermocouple values, press
“Settings” from the Temperature screen. The following screen will
appear.
Pressing any data box will bring up an onscreen numerical keyboard
that allows data input. When finished making setpoint, limit and offset
changes, press ENTER to return to the Temperature screen.
4.7.7.3 PID S ETTINGS
The temperature controllers used in the GC-Pro are three-term
controllers with proportional (Kp), Integral (KI), and derivative (Kd)
settings. Together, these parameters determine the overall control and
response of the instrument.
Optimum values for Kp, KI, and Kd have been determined at the
factory and set for your instrument. The PID Settings menu from the
Temperature main menu will display the current values for each of the
three heaters and allow the user to modify the setting.
To access the parameters, press PID Settings from the Temperature
screen.