Mettler Toledo M300 FLOW Especificações descarregar pdf (Página 51)

Transmitter M300 FLOW 51

Printed in Switzerland 52 121 319

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]. Enter the System security code ”xxxxx” if required, (see

section 9.3) and press the [ENTER] key to conﬁrm the code.

Note: to exit PID Setup mode at any time press the  and  keys simultaneously

(Escape). The transmitter returns to the Measurement mode and the old values

remain active.

10.2 PID Display Auto-Manual

(PATH: Menu/PID Setup/PID A/M Manual)

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.

10.3 Tune Parameters

(PATH: Menu/PID Setup/Tune Parameters)

This menu assigns control to a measurement and sets the tuning parameters, setpoint,

and non-linear functions of the controller.

10.3.1 PID Assignment & Tuning

Assign the measurement, a, b, c, or d (single channel models) or A, B, C, D, a, b, c, d

(four channel transmitters) to be controlled. Set the Gain (unitless), Integral or Reset time,

Tr (minutes) and Rate or Derivative time, Td (minutes) needed for control. Press [ENTER].

Gain, Tr and Td are later adjusted by trial and error based on process response. Td is usually

left at zero for ﬂow control.

10.3.2 Setpoint & Deadband

Enter the setpoint value and the deadband around the setpoint, where no proportional control

action will take place (normally zero for ﬂow). Press [ENTER].

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Mettler Toledo M300 FLOW Especificações Página 51