Serinus 44 User Manual 3.0
Note: This action will place the valve sequencing on hold and disable the ozone generator; normal
sampling will be interrupted.
3. Edit - Vacuum Set Pt. - (Read displayed instructions) - OK.
4. Connect a vacuum source to Exhaust Port (refer to Figure 7) of instrument.
5. Wait 1 minute for the vacuum to purge the remaining O
3
from the system.
6. Connect a barometer to the BGnd Air Port, wait 2-5 minutes and ensure the pressure reading on
the barometer has dropped and is stable.
7. Enter the barometer reading into the instrument - Accept.
Note: Only the reaction cell and auxiliary valve manifold pressure sensors will be calibrated as they
will be exposed to vacuum.
8. Read displayed instructions - OK.
9. Turn off the vacuum source and wait 1 min or until the barometer reads ambient. Disconnect the
barometer and vacuum source from the BGnd Air Port and Exhaust Port.
10. Wait 2-5 min, enter the ambient barometer reading into the instrument - Accept.
Note: All three sensors should now be displaying the current ambient pressure and they should be
the same value within 3 torr of each other.
11. Back - Pressure Calibration Menu - (read note) - OK.
5.2.2 Ambient Point Pressure Calibration
Full pressure calibrations are generally recommended, however it is possible to calibrate only the
ambient point in cases where only a minor ambient pressure adjustment is required.
Note: Ensure that the instrument has been running for at least one hour before any calibration is
performed to ensure the instrument’s stability.
Note: Ensure units of measure are the same on both the barometer and instrument.
Equipment Required
Barometer
Procedure
1. Disconnect all external tubing connected to the rear ports of the instrument except for the AUX
in Port and AUX Out Port (for the external converter).
2. Open - Main Menu Calibration Menu Pressure Calibration Menu - (read note) - OK.
Note: This action will place the valve sequence on hold; normal sampling will be interrupted.
3. Edit - Ambient Set Pt. - (Read displayed instructions) - OK.
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