Ecotech Acoem Serinus 10 - Pressure Sensor Check; Figure 142 - Remove Orifice and Sintered Filter

Service
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10. Remove the remaining o-ring and sintered filter.
Figure 142 – Remove Orifice and Sintered Filter
11. Replace the sintered filter and o-ring. If you were getting the incorrect flow check the orifice
isolated from the instrument. If flow of the isolated orifice is still bad clean or replace orifice. Ideally
the orifice should be cleaned in a sonic bath with lab detergent and water.
Note: Replace the o-ring on the orifice if reusing.
12. Ensure the sintered filter, o-ring, orifice and spring go back in the lamp block in the correct order.
13. Remove old Teflon tape form the elbow fitting and apply fresh tape then proceed to screw the
elbow fitting back into the lamp block in a clockwise direction.
Note: Point the elbow fitting towards the Ozone selective scrubber.
14. Fit the lamp block back into its original position, twisting it backing into the measurement cell
(glass).
15. replace and tighten the two screws retaining the lamp mounting block and the two screws
retaining the cover collet.
16. Perform a leak test (refer to Section 6.4.3).
17. Perform a zero and span calibration (refer to Section 5.4 and Section 5.5).
6.4.9 Pressure Sensor Check
Pressure checks are needed to ensure that the pressure sensor is accurately measuring pressure inside
the instrument.
During normal operation ensure that the Pressure and Flow Menu indicate the following parameters.
Ambient should display the current ambient pressure at site. Cell should indicate current cell pressure
depending on the pump condition and location. The cell pressure is normally about 10 torr below
ambient.
Equipment Required
• Barometer
• Digital Multimeter (DMM)