PerkinElmer Photovac 2020 Manual page 74

2020 Software Manual
NOTE: Do not set the flow rate too high.
If you turn off 2020 in the middle of zeroing or spanning, the next
time you turn it on it will display a Cal status. This indicates that you
need to calibrate 2020.
NOTE: While the Cal status is active, all alarms are deactivated.
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9. Select "Set", "Cal" and "Span". 2020 asks for the span
gas concentration. Enter the known span gas
concentration, without pressing the ENTER key to
confirm it.
10. Insert the 2020 sample probe into the adapter tubing
from the regulator. See Figure 11.
11. Ensure the calibration gas cylinder is upright and open
the regulator by turning the valve counter clockwise.
Open the regulator until the ball is 1/8" from its rest
position.
12. Press the ENTER key. 2020 sets its sensitivity.
13. When the display reverts to the default display, 2020 is
calibrated and ready for use.
14. Remove the adapter tubing from the inlet and close the
regulator.