User`s guide

M3000A/M3046AM3015A/M3016A Service Guide
Testing the Instrument 4-11
6WHS Select “Close Valves: On”
6WHS Raise the pressure to 280 mmHg with the manometer pump.
6WHS Wait 10 seconds for the measurement to stabilize.
6WHS Compare the manometer values with the displayed values.
6WHS Document the value displayed by the M3046A (x1).
6WHS If the difference between the manometer and displayed values is greater than 3
mmHg, calibrate the Server. If not proceed to the Leakage test.
6WHS To calibrate, select “Close Valves off” then “Calibrate NBP” and wait for the
Instrument to pump up the expansion chamber.
6WHS When pumping has stopped, wait a few seconds until “EnterPrVal” is highlighted
and then move the cursor to the value shown on the manometer.
127( If one of the following prompt messages appears during this step, check
whether there is leakage in the setup:
— NBP unable to calibrate–cannot adjust pressure
— NBP unable to calibrate–unstable signal
6WHS Press Confirm.
127( If the INOP NBP Equipment Malfunction message occurs in Monitoring Mode, go
back to Service Mode and repeat the calibration procedure.
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This test checks the integrity of the system and the valve. The NBP leakage test is required
once per year and when the Instrument is repaired or when Instrument parts are replaced.
6WHS If you have calibrated, repeat steps 2 to 6 from the Accuracy test procedure so that
you have 280 mmHg pressure on the expansion chamber.
6WHS Watch the pressure value for 60 seconds.
6WHS Calculate and document the leakage test value (x2).
x2 = P1 - P2
where P1 is the pressure at the beginning of the leakage test and P2 is the pressure
displayed after 60 seconds.
The leakage test value should be less than 6 mmHg.
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6WHS Reduce the manometer pressure to 150 mmHg.
6WHS Wait 10 seconds for the measurement to stabilize.