Bacharach Parasense GRM2 CO2 Series, Operation & Maintenance Manual

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Operation & Maintenance Manual
Doc. Ref. MNGRM2CO2 REV. 3
CALIBRATION OF BACHARACH MGS.150 NETWORK SENSOR
IMPORTANT: Failure to test or calibrate the unit in accordance with applicable
instructions and with industry guidelines may result in serious injury or death. The
manufacturer is not liable for any loss, injury, or damage arising from improper
testing, incorrect calibration, or inappropriate use of the unit.

Check local regulations on calibration or testing requirements

The MGS contains sensitive electronic components that can be easily damaged. Do not touch nor
disturb any of these components

The MGS is calibrated at the factory. After installation, a zero adjustment maybe required due to
differences in environmental conditions.

The calibration of the unit must be carried out by a suitably qualified technician, and must be done
in accordance with this manual and in compliance with locally applicable guidelines and
regulations.

Annual checks and gas calibration are recommended. It is also recommended that sensors are
replaced every 3 years or as required. Calibration frequency may be extended based on
application, but should never exceed 2 years.

For improved accuracy and response, the instrument should be zeroed and calibrated in the
environment in which it is being installed.
There are two adjustments required: zero and span. They are monitored at 0V and VS using a 0-5V
scale. If the sensor range is 0-1000 ppm, then 5V=1000 ppm. You will require a multi-meter with clips
to connect to the test pins and a “small flat screwdriver” to adjust the potentiometers.
Parasense offers a calibration kit that consists of a
calibration gas cylinder, a flow regulation valve with
flexible non-absorbent tubing and vented calibration
hood:
Calculating Calibration Voltage:
Sensor outputs are linear. As long as you have a gas cylinder of known concentration you can
calibrate to any desired range.
Example:
For a sensor range of 0-1000 ppm and a cylinder of the target gas at 800 ppm:
So the output voltage signal should be adjusted to 4V.