22. Connect the barometer to Calibration Port.
Figure 128 – Barometer to Calibration Port
23. Allow the internal pump time to evacuate the pneumatic system (the time required will depend on
the condition of the pump, 1 - 2 minutes).
24. Open - Main Menu → Service Menu → Diagnostics Menu → Internal Pump Menu.
25. Toggle Off - Internal Pump → Off.
26. Note the value on the barometer. Wait for three minutes, the value should not drop more than
5 kpa (37.5 torr). If the leak check passed skip to step 29.
27. If you passed the first leak check on the sample side then the leak is between the calibration valve
manifold and the calibration port.
28. Repair and re-run the leak check procedure.
29. Slowly release the vacuum by gradually loosening the barometer on the Calibration port until the
instrument has returned to ambient pressure.
30. Remove the blocker on the pump bypass flow.
31. Open - Main Menu → Service Menu → Diagnostics Menu → Valve Menu.
32. Enable - Valve Sequencing → Enabled.
33. Open - Main Menu → Service Menu → Diagnostics Menu → Internal Pump Menu.
34. Select - Pump Control → Start - Accept.
6.4.4 Ozone Scrubber Check
The performance of the Ozone scrubber is critical to the Serinus 10. Although the Ozone scrubber will
theoretically last forever (if only exposed to clean air and Ozone), exposure to other elements in the
atmosphere will adversely affect the life span of the scrubber. A weak or failed scrubber can result in
noisy measurements, frequently caused by excessively high gain.
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