Teledyne 300M - Manual (Page 81)

Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A
For minimum back-diffusion through the vent and for minimum back-pressure in the manifold,
the following relationship should be met:
500 =
Ч
Ч
D Q
L Q
a
v
Where Q
v
is the vent flow in cc/min
Q
a
is the analyzer flow in cc/min
L is the vent line length in inches
D is the ID of the vent line in inches
For Q
v
of 1000 cc/min
Q
a
of 800 cc/min
D of .188 inches
L = approximately 72”
8.2 Multi-Point Calibration
Multi-point calibration requires seven approximately equally spaced calibration points, including
zero, using an NIST-traceable CO source.
The calibration must be carried out:
1. After maintenance
2. Every three months (recommended)
CAUTION
The test gas must be introduced into the analyzer through the sample
inlet port. All flow measurement devices must be calibrated against
an nist-traceable standard such as a bubble-flowmeter that has been
calibrated against an nist-traceable volume standard.
8-3