2.3 Instrument Set-up
After installing the instrument the following procedures should be followed to ready the analyser for
monitoring:
Figure 4 – Instrument back panel
2.3.1 Pneumatic Connections
The Serinus 40 has 4 pneumatic ports on the back panel of the analyser; the sample port, the
calibration port, the exhaust port and the background air port. All tubing and fittings used should
follow the instructions below:
Must be made of Teflon® FEP material, Kynar®, stainless steel, glass or any other suitably inert
material
Sample line should be no more than 2 meters in length with ⅛ inch ID, ¼ inch OD
Sample inlet pressure should not exceed 5 kPa above ambient pressure
Tubing must be cut squarely and any burrs removed
Remove the inlet port nut, then insert the tubing through the back of the nut with the tube
extending 1 inch through the front
Place the tubing into the port until it hits the tube stop inside fitting
Place the nut back onto the fitting and tighten clockwise until finger tight
Nuts should be re-tightened when instrument reaches operating temperature
Sample Port
The sample port must be connected to an ambient source of sample air. When using a sample
manifold the Serinus requires at least 1 slpm delivered to the sample manifold (0.6 slpm for
measurement plus approx. 50% overflow).
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