Calibration Serinus 51 User manual 1.0
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Figure 10 Pressure menu
9. Select the set option (activate buttons) the Current Pressure window will open
10. Using the keypad, input the current pressure reading on the meter.
11. Press the “Accept” button to calibrate pressure sensors
Ambient
1. Continuing from the Vacuum calibration, remove the pressure meter from the
cell fitting
2. Remove the stainless steel blocker from the cell T-piece fitting (3 in Figure 9)
3. Switch off and disconnect any vacuum sources from the Exhaust port.
4. Measure the ambient pressure from the meter
5. Enter the main menu Calibration menu Pressure calibration
6. Select ambient (ambient pressure) then select the unit of pressure being used
(torr etc)
7. The screen will display two horizontal bars (Figure 10) the first (Amb) is for
the ambient pressure sensor, the second (Cell) is for the cell pressure sensor
8. Ensure that the pressure is stabile (arrows are not moving up and down the
bar.
9. Select the set option (activate buttons) the Current Pressure window will open
10. Using the keypad, input the current pressure reading on the pressure meter in
ambient air.
11. Press the “Accept” button to calibrate pressure sensors
12. Reconnect tubing to cell as shown in 1 +2 Figure 9
4.6 Precision check
A precision check is a Level 2 calibration. This means that the instrument has a
known concentration, or zero air, run through it and an observation of the
instruments concentration is made with no adjustment. A precision check can be
performed either manually or automatically.
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