
Operating Manual
121
© Copyright 2016
OMBG3000 – Rev1
Gas Check and Calibration
6
Warning
Do not open when an explosive atmosphere is present.
6.1
Introduction
The BIOGAS 3000 system is carefully calibrated at manufacture and when
returned for service using a number of gas concentrations and temperature
points. However, it is sometimes desirable to carry out a gas check on the
equipment to prove its accuracy and rectify any inaccuracies with a calibration
process between services.
The BIOGAS 3000 measures CH
4
, CO
2
, and O
2
as standard with optional
additional gases and these channels can be user calibrated. This section will
describe in detail the correct procedure to gas check and calibrate these gas
channels.
Note: This does not replace the factory service and calibration.
Note: If this calibration is completed incorrectly, it may decrease the
accuracy of the system.
Four important terms that are used within this section are:
Gas check:
This is where a known concentration of gas is applied to the system
and its responses are checked with no adjustment being made.
Calibration:
This is when an adjustment is made to the modules readings after
a gas check has been performed, by either a zero, span, or both.
Zero:
The point at which the system is calibrated when there is none of the
target gas present.
Span:
The point at which the system is calibrated when there is a known
concentration of the target gas present.
Note: A more detailed explanation of user calibration can be found in
section
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