LumaSense Technologies INNOVA 1412i - Manual (Page 147)

Chapter 12
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BE6025-15 1412i Photoacoustic Gas Monitor LumaSense Technologies A/S
Page 147 of 202
12.4 The Basic Calibration Set-up
The general equipment required to perform the calibration is shown
in Fig.12.5. Three different lengths of teflon tubing are connected to
a “Y”-piece. The tube attached to point 1 is connected to the air-inlet
of the Monitor; the tube attached to point 2 is attached to a gas flow
meter or similar apparatus; and the tube attached to point 3 is at-
tached to the cylinder of gas which is to be used during calibration.
Fig.12.5 General equipment required for a calibration task
Attaching a gas flow meter serves two vital functions (see Fig.12.6):
Fig.12.6 Schematic diagram of a flow meter