Serinus 44 User Manual 3.0
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, please
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).
5.9.1 Single Pressurised Calibration Option
Set-Up of Single Calibration Option
Figure 48 – Single High Pressure Calibration Option
When using the pressurised calibration option, either a high pressure zero or span cylinder
(depending on the option you have ordered) should be connected to the Pressure in Port.
Equipment Required
Calibrated Flow Meter
Gas Cylinder
Procedure
1. Ensure the gas cylinder is fitted with an appropriate gas regulator with a shut off valve.
2. Connect a ¼” line of stainless steel tubing between the gas cylinder and the instruments Pressure
in Port.
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