Pump Overloading; Maintenance; Service Parts - Cole-Parmer Masterflex L/S 07519-10 Manual De Operación

(b) Occlusion Setting Procedure:
1. Select the recommended occlusion value from the table.
2. Turn the Occlusion Adjustment Knob to align the inside edge of the white Wedge with the scale number. (Clockwise
rotation increases the occlusion.)
(c) Optimized Occlusion Settings
Some applications require additional fine-tuning of the occlusion setting to vary the flow rate for a particular tubing to re-
duce flow variations caused by changes in system pressure, or to increase tubing life.
1. Adjust the Occlusion Wedges as described in the preceding table.
2. Refine this setting, depending on your objectives:
NOTE: To Maximize Tubing Life
While running the pump, simply reduce the adjusted occlusion setting by turning the Occlusion Adjustment Knob coun-
terclockwise to move the wedges to a higher setpoint scale number (toward 5). Continue turning the knob counterclock-
wise until the flow drop-off or the pressure sensitivity becomes unacceptable, then turn knob slightly clockwise.
NOTE: To Reduce or Eliminate Flow Drop-Off Rate with Pressure Fluctuations
While running the pump, alternate the backpressure between the expected high and low values and increase the ad-
justed occlusion setting. Turn the Occlusion Adjustment Knob clockwise to move the wedges to a lower setpoint scale
number (toward 1) until the flow drop-off is minimized.
NOTE: To Fine-Adjust the Flow Rate
Increase or decrease the occlusion value to vary the flow.

(5) Pump Overloading

Models 07519-15 and 07519-25 have an auto-resetting limit clutch built in to protect the Pump and Drive in the event of
excessive loading. When an overload occurs, the pump rotor will stop rotating and the clutch will emit an audible clatter.
The clutch capacity is sufficient to drive most combinations of tubing size and material at any pump speed with a full com-
plement of channels operating. Some larger sizes of stiff tubings pumping through tight occlusion settings at higher
speeds will cause an overload condition. This will limit the number of channels that can be run.
No maintenance required. Wipe Pump with a clean cloth and a mild detergent. Never immerse or use excessive fluid.

Service Parts:

Hex Key (9/64 in Hex)
Models 07519-10 and 20:
Models 07519-15 and 25:
Mtg. Screws (8-32)
Models 07519-10 and 20:
Models 07519-15 and 25:
Leveling Feet
Models 07519-15 and 25 only:

MAINTENANCE

A-3502
A-4376
B-1079-0407
B-1079-0408
A-4128-0002, (2 in)
A-4128-0003, (1-1/4 in)
A-4128-0004, (1-5/8 in)
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