a. Pressurise the line.
b. Close the cylinder main valve.
c. If pressure drops by more than 2 PSI over five minutes, check the connections and retest.
d. Open cylinder main valve.
5. Temporarily place a flow meter on the Vent Port (This port is now used as the high pressure
calibration vent for both span and zero).
6. Open - Main Menu Calibration Menu.
7. Select - Cal. Type Manual - Accept.
8. Select - Cal. Mode Zero - Accept.
Note: When using the high pressure zero option, ensure Zero Source is set to External.
9. Adjust the regulator pressure until the flow meter on the vent line (Vent Port) is between 0.5 and
1 slpm. This flow rate is you excess calibration gas.
Note: Do not exceed a pressure of two bars, this can damage the instrument and cause gas leakage.
10. Select - Cal. Mode Span - Accept.
11. Adjust the regulator pressure until the flow meter on the vent line (Vent Port) is between 0.5 and
1 slpm. This flow rate is you excess calibration gas.
Note: Do not exceed a pressure of two bars, this can damage the instrument and cause gas leakage.
Return to Normal Operation
12. Select - Cal. Mode Measure - Accept. (To return to sample measure).
13. Remove the flow meter on the Vent Port and connect a vent line.
14. Reconnect the instrument fittings and return to the original set-up.
The instrument is now in normal operation mode. When either zero or span calibration is initiated
the instrument will automatically open the valves to run a pressurised calibration.
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