Serinus 40 User Manual 2.2
Figure 56 – Pressure gauge on exhaust
Leak Check Procedure
1. Connect a shut off valve to the exhaust port of the analyser.
2. Connect a pump to the shut off valve ensuring the shut off valve is in the open position, turn on
the pump.
3. Block the analyser’s sample calibration and BGnd air ports with a Swagelok ¼” blocker nut.
4. Switch on the analyser, navigate from the Main Menu Service Menu Diagnostics Valve
Menu. Switch off the valve sequencing and close all valves.
5. Close the shut off valve and record the vacuum. Wait for 3 minutes and then observe the gauge
on the leak check jig. It should not drop more than 5kpa. If it has then a leak is present within the
sample cycle of the instrument.
6. Enter Main Menu Service Menu Diagnostics Valve Menu. Then set Sample/cal to open.
7. Turn on the pump, switch the shut off valve to the open position and allow the pump to evacuate
the pneumatics.
Switch the shut off valve to the closed position and turn off pump. Record the vacuum indicated
on the leak checking device. Wait 3 minutes then observe the gauge on the leak check device. It
should not drop more than 5kpa. If it does then a leak is present within the zero cycle of the
instrument.
8. Enter Main Menu Service Menu Diagnostics Valve Menu. Then set Sample/cal to open
and Internal zero/cal to open.
9. Turn on the pump, switch the shut off valve to the open position and allow the pump to evacuate
the pneumatics.
10. Switch the shut off valve to the closed position and turn off pump. Record the vacuum indicated
on the leak checking device. Wait 3 minutes then observe the gauge on the leak check device
which should not drop more than 5kpa, if it has then a leak is present within the span calibration
cycle of the instrument.
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