Note: This connection may need to be retightened during this operation.
3. Open the cylinder main valve and adjust the regulator to 15 psig.
4. Open the regulator’s shutoff valve and test for leaks:
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 Calibration Port (this port is now used as the high
pressure calibration vent).
6. Open - Main Menu Calibration Menu.
7. Select - Cal. Type Manual - Accept.
8. Select - Cal. Mode Span or Zero - Accept (depending on the option installed).
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 (Calibration Port) is between
0.5 and 1 slpm. This flow rate is you excess calibration gas.
Note: Do not exceed a pressure of 2 bars, this can damage the instrument and cause gas leakage.
Return to Normal Operation
10. Select - Cal. Mode Measure - Accept. (To return to sample measure).
11. Remove the flow meter on the Calibration Port and connect a vent line.
12. 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
(depending on which option has been installed) the instrument will automatically open the valves to
run a pressurised calibration.
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