Specifications

Transmitter O
2
M300 46
© 05/07 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter O
2
M300
Printed in Switzerland 52 121 305
10.3.1 Tune Parameters
(PATH: MENU/PID Setup/Tune Parameters
This menu assigns control to a measurement and sets the setpoint, tuning parameters and non-
linear functions of the controller through a series of screens.
10.3.2 PID Assignment & Tuning
Assign the measurement, a, b, c, or d to be controlled after "PID on_". Set the Gain (unitless),
Integral or Reset time Tr (minutes) and Rate or Derivative time Td (minutes) needed for control.
Press [ENTER]. Gain, Reset and Rate are later adjusted by trial and error based on process
response.
10.3.3 Setpoint & Deadband
Enter the desired setpoint value and the deadband around the setpoint, where no proportional
control action will take place. Press [ENTER].
10.3.4 Proportional Limits
Enter the low and high proportional limits in dissolved oxygen units – the range over which
control action is required. Press [ENTER].
10.3.5 Corner Points
Enter the low and high corner points in dissolved oxygen units and the respective output values
from –1 to +1, shown in the figure as –100 to +100%. Press [ENTER].