2-3.
OPERATIONAL CHECKOUT
Understanding the circuits and how components function will help you identify
malfunctions and repair or replace components. Before you calibrate the programmable
suction pump, an operational checkout ensures the various systems involved are
performing properly. The following paragraphs provide the steps of a brief operational
check.
a. Continuous Suction Operation (120v/220v) Switch. Plug the unit into a
wall outlet. Push in the master-power switch. The pilot lamp and power-mode lamp
should be lit. Rotate the vacuum-control knob fully clockwise. The vacuum-control
lamp should now be lit. Pinch the rubber tubing and watch the vacuum gage, which is
calibrated in mmHg rather than cmH2O. It should read 300mmHg or more.
b. Intermittent Suction Operation (120v/220v). Plug the unit into a wall
outlet. Push the master-power switch in. The pilot lamp and the power-mode lamp
should light. Push the suction-mode and suction-level switches in. Both the suction-
mode and suction-level switches should be lit. Rotate the vacuum-control knob fully
clockwise. The vacuum-control lamp should be lit. Set the on-time control knob to five
seconds. Set the off-time control knob to five seconds. The unit should cycle on and off
every five seconds. Pinch the rubber tubing. The vacuum gage should read 200mmHg.
c. Continuous Suction Operation (Internal 12vdc). Unplug the unit from the
wall outlet. Push the master-power switch in. Push the power-mode switch in. The
master power lamp should be lit. Rotate the vacuum-control knob fully clockwise. The
vacuum control lamp should now be lit. Pinch the rubber tubing. The vacuum gauge
should be reading 300mmHg or more.
d. Intermittent Suction Operation (Internal 12vdc). Unplug the unit from the
wall outlet. Push the master-power switch in. Push the power-mode switch in. The
master-power lamp should be lit. Push the suction-mode and suction-level switches in.
Both the suction-mode and suction-level switches are lit. Rotate the vacuum-control
knob fully clockwise. The vacuum control lamp should now be lit. Set the on-time
control knob to five seconds. Set the off-time control knob to five seconds. The unit
should cycle on and off every five seconds. Pinch the rubber tubing. The vacuum gage
should read 200mmHg at this setting.
e. External 12vdc Operation. Plug the external 12vdc-power-supply into the
jack on the back of the unit. Set the controls up for continuous or intermittent operation
according to the instructions given above.
MD0365
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