4. Off - Internal Pump → Off.
5. Wait for the Sample Flow to become stable around 0 (± 0.01 slpm).
6. Set - Cal. Zero - Yes (Calibration of your zero point).
7. Connect a calibrated flow meter to the Sample Port.
8. On - Internal Pump → On.
9. Edit the Coarse and Fine pots until the flow meter reads the desired instrument Sample Flow rate
(Set Point).
Note: Adjust the Fine pot to 253, adjust the Coarse to be as close as possible to desired reading
and use Fine pot to make it exact.
10. Edit - Cal. Point - (Enter the reading from the flow meter) - Accept.
11. Select - Pump Control → START - Accept.
12. Leave for up to 5 minutes to return to normal operation. If instrument doesn’t return to normal
there may be a blockage (refer to Section 7).
13. Remove flow meter and reconnect external tubbing.
14. Back - Flow Calibration Menu - (Read note) - OK.
5.9 High Pressure Zero/Span Valve (Option)
If the instrument was ordered with this option, the internal pressurised calibration valves will already
be installed within the instrument as either a zero or span calibration source, thus no other internal
connections need to be made.
Note: Before using a high pressure span or zero as a source for calibrating the instrument, check
the local regulatory requirements. This is generally only be used as an operational check of the
instrument’s zero point and single span point (recommended as 80% of full scale).
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