Watson & Sons 520DUN user manual Trim

18.1 Trim

When the pump is under remote control, it tracks an analogue signal from the user’s remote control system to the i/p terminal of the Analogue 1 and Analogue 2 con- nectors at the rear of the pump within the ranges 4-20mA or 0-10V. The Trim setup sequence allows the user to customise the process-signal-to-pump-speed calibra- tion. The sequence may be entered directly from the Setup menu or from the Analogue setup menu.

￿Select Trim from the Setup menu or the Analogue setup menu using the UP or DOWN keys and press ENTER to confirm your choice.

￿Apply the low process analogue signal to the i/p terminal of the Analogue 1 connector as instructed in the display. See 18.2 Analogue. While the signal is being applied, press ENTER to record the signal as a calibration point.

￿Apply the maximum process control signal. While the signal is being applied, press ENTER to record the signal as a calibration point.

￿Apply 50% of the maximum process control signal. While the signal is being applied, press ENTER to record the signal as a calibration point.

￿If a mistake is made, press STOP at any point in the sequence, and the pump displays the previous screen.

Watson-Marlow 520DuN IP66/NEMA 4X User Manual 36