7. Preventive Maintenance/System Operational Check-Out
7-95
iii. Press once more to change speed to 500 ml/min and repeat the
measurement. The accepted tolerance is 500 ± 50 ml/min.
iv. Press once more to change speed to 750 ml/min and repeat the
measurement. The accepted tolerance is 750 ± 75 ml/min.
v. For 1000 ml/min option, press once more to change speed to
1000 ml/min and repeat the measurement. The accepted
tolerance is 1000 ± 100 ml/min.
Measure by using a tachometer:
vi. Close the door. Set the pump speed to 10 ml/min. Use a
tachometer to measure the rotational speed of the pump head.
The accepted tolerance is 1.95 rpm ± 25%.
vii. Press PUMP SPEED again to change the pump speed to 100
ml/min. The accepted tolerance is 19.65 rpm ± 10%.
viii. Press once more to change speed to 500 ml/min and repeat the
measurement. The accepted tolerance is 97 rpm ± 10%.
ix. Press once more to change speed to 750 ml/min and repeat the
measurement. The accepted tolerance is 146 rpm ± 10%.
x. For 1000 ml/min option, press once more to change speed to
1000 ml/min and repeat the measurement. The accepted
tolerance is 195 rpm ± 10%.
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