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122 Operating Manual
Gas Check and Calibration
OMBG3000 – Iss.01 © Copyright 2016
6.2 Required Equipment
Gas
6.2.1
User calibration of the system will greatly improve the data accuracy in the
range of the calibration gas used and the environmental conditions for which
the BIOGAS 3000 is calibrated. This may cause less accurate readings of
concentrations outside of this calibrated range.
Users should select the correct calibration gas for the expected gas levels on
their particular application. In addition, nitrogen (N
2
) can be used for a zero
calibration. If this is not available, then clean ambient air can be used.
Warning Calibration gases can be dangerous. For each gas used,
the appropriate material safety data sheet must be read
and fully understood before proceeding.
Flow Regulator
6.2.2
It is recommended that the regulator available via LANDTEC be used as it has
been configured to deliver a fixed flow of 300ml/min and correct pressure
relief to avoid damage to the system (see LANDTEC part number GA6.8 in
BIOGAS 3000 Consumable Products ). As the regulator’s flow is factory set it
only requires a few turns to open, no adjustment will be necessary.

Note: If using a regulator that was not supplied by LANDTEC, please
ensure that the flow rate is adjusted to a maximum of 300ml/min.
Suitable pressure relief should be ensured to protect the system from
damage because of over-pressurization – typically 3-5psi (200-350mbar).
Warning When the system is being calibrated, in cases of over-
pressurization, the 1/16” port on the red pressure relief
valve (supplied with the LANDTEC pressure regulator)
will release gas to protect the BIOGAS 3000 module.
It is recommended that the exhaust tubing from the
pressure relief valve emerge in a well-ventilated area.
Ensure there are no leaks in the tubing and connections
before carrying out a user calibration.