5. Temporarily place a flow meter on the Vent Port.
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 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
1. Select - Cal. Mode → Measure - Accept. (To return to sample measure).
2. Remove the flow meter on the Vent Port and connect a vent line.
3. Reconnect the instrument fittings and return to the original set-up.
The instrument is now in normal operation mode. When zero calibration is initiated the instrument
will automatically open the valves to run a pressurised calibration.
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