User`s guide

M3000A/M3046AM3015A/M3016A Service Guide
Testing the Instrument 4-15
accompanied by an audible increase in pump noise. (Do not block the inlet for
longer than 25 seconds as this will lead to an “Occlusion” INOP.) If the value is
within the tolerance limits, there are no leakages and the leakage check is com-
pleted; proceed to the Pump Check.
6WHS If the value is not within the tolerance limits, there is a leakage between the Filter-
Line inlet and the pump inlet.
6WHS Check the FilterLine connections and open the M3015A to check the tubing con-
nections at the pump inlet and the M3015A gas inlet. If the connections are good,
try replacing the FilterLineand repeating the leakage check. If the situation remains,
there is a leakage in the tubing and the M3015A must be exchanged.
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6WHS Connect the flowmeter inlet to the M3015A gas outlet.
6WHS Connect the FilterLine to the M3015A inlet.
6WHS Block the inlet of the FilterLine using your fingertip and observe the cell pressure
on the M3046A display. The cell pressure (x4) should be more than 120 mmHg
below the ambient pressure shown. If the pressure difference is less than 120
mmHg, the pump is not strong enough and should be replaced (irrespective of the
Pump OpTime).
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Check the flow rate in the sidestream CO
Extension as follows:
6WHS Connect the flowmeter to the CO
FilterLine.
6WHS Check on the flowmeter the flow that the sidestream CO
Extension Pump draws
(x5). It should be 50 ml/min ± 7.5 ml/min. If the value is within tolerance, proceed
to the CO
2
Gas calibration check. If the value is not within tolerance, calibrate as
follows.
6WHS Adjust the flow in the Instrument by selecting “Increase Flow” or “Decrease Flow”
until it is as close as possible to 50 ml per minute as indicated on the flowmeter
gauge.
6WHS When you are satisfied that the flow is set as close as possible to 50 ml per minute,
select “Store Flow” and confirm the setting. Note: If the adjusted flow is not stored
within 60 seconds of the adjustment, the old flow setting will be restored.
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If the flow cannot be adjusted to within tolerance, the pump should be replaced. If the flow
adjustment still cannot be made, this indicates a fault in the M3015A Measurement
Extension, which must be replaced.