
Transmitter Multiparameter M400 57
© 11 / 08 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Multiparameter M400
Printed in Switzerland 52 121 378
further out and proportional limits at the ends of control as shown in the figure below.
Determine the appropriate settings for each of these control parameters based on the shape
of the pH process titration curve.
Controller with Corner Points
–120%
–100%
–80%
–60%
–40%
–20%
0%
20%
40%
60%
80%
100%
120%
0 2 4 6 8 10 12 14
Process Variable
Deadband - value
Proportional limit –100% value
Proportional limit +100% value
Y
P
Error (%)
Direct corner point (value, %)
Set point value
Deadband + value
Reverse corner point (value, %)
10.1 Enter PID Setup
While in Measurement mode press the key. Press the or key to navigate to the PID
Setup – Menu and press [ENTER].
10.2 PID Auto / Manual
(PATH: MENU / PID Setup / PID A / M)
This menu allows selection of Automatic or Manual operation. Select Auto or Manual operation.
Pressing the [ENTER] key will bring up the Save Changes dialog.
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