Specifications

M GD-100 M anual
34 6109-9000 Rev 3
IMPORTANT: Before testing the sensors on-site, the MGD-
100 must have been powered up and allowed to stabilize fo r
at least 24 hours. See Section 5.
IMPORTANT: Failure to t est or calibrate t he unit in
accordance with applicable instructions and with industry
guidelines may result in seri ous 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.
IMPORTANT: Bacharach recommends annual checks and
gas calibration. Bacharach als o rec ommends sensor
replacement every 3 years or as required. Calibration
frequency may be extended based on application, but should
never exceed 2 years.
IMPORTANT: In applications where li fe safety is critical,
calibration should be done quarterly (every 3 months) or on a
more frequent basis. Bacharach is not responsible for setting
safety practices and policies. Safe work procedures including
calibration policies are best det ermined by company policy,
industry standards, and local codes.
NOT E: For improved accuracy and response, the instrument
should be zeroed and calibrated in the environm ent in which
it is being installed.
There are two concepts that need to be differentiat ed:
Bump Test Exposing the sensor to a gas and observing its response
to the gas. The objecti ve is to establish if the sensor is
reacting to the gas and all the sensor outputs are working
correctly. There are two types of bump test.
• Quantified: A known concentrati on of gas is used.
• Non-Quantified: A gas of unknown concentration is
used.
Calibration Exposing the sensor to a calibration gas, setting the “zero”
or “Standby voltage”, the span/range, and checking/
adjusting all the outputs, to ensure that they are activated
at the specified gas concentration.