Watson-Marlow 504U/RL - Manual (Page 6)

6
Response Range mA Offset mA Pin 2 Pin 3
Non-inverted 12 to 30 0 to 30 – +
inverted 12 to 30 0 to30 + –
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Ensure the correct wiring of the 6 pin plug and insert the plug into the socket at the rear of the pump.
• Remove the rear panel recess window.Turn the signal offset potentiometer clockwise until the slider traverse
limit is reached and is signified by a clicking noise. Now turn the potentiometer ten turns anticlockwise.
• Repeat for the signal range potentiometer. This ensures correct potentiometer set up for calibration.Set the
process signal offset.
• Turn the signal offset potentiometer clockwise to set the drive shaft speed to the desired minimum.
• Set the process signal at its upper range limit (not exceeding 30V or 32mA).
• Turn the signal range potentiometer clockwise to set the drive shaft speed to the desired maximum.
• Repeat the procedure until pump response coincides exactly with the process signal.
If the signal rises above its designated maximum, the action of the signal conditioner will be to hold the motor to
maximum speed at the MAX setting indicated by the flashing of the LED indicator. If the signal rises above 30V,
permanent damage, not covered by warranty, may result.
Securely replace the rear panel recess on the back of the pump ensuring the gasket is in the
correct position. This will avoid the ingress protection standard of the pump unit being
compromised.
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Stop/Start
Connect remote switch between pins 1 and 5 of the 6 pin socket. Close contact to stop the pump, open to run.
A TTL compatible logic input (Low 0V, High 5V) may be applied to pin 5 (pin 2 common) with 5V High = stop, 0V
low = run).