Bacharach MGS 400 User Manual

Also see for MGS-400: User manual

Contents

Bacharach MGS 400 User Manual Manual pdf 36 page image

1100-2294 Rev 1 35Sensor Type Maintenance Interval Typical Sensor LifetimeElectrochemical*12 months 2-3 yearsCatalytic Bead Zero calibration -1-3 monthsSpan calibration - 6 months5-7 yearsSemiconductor* 6 months after commissioning12 months thereafter4-6 yearsInfrared 12 months 5-7 years* Sensors should be checked after exposure to significant concentrations of gas,which can shorten the sensor lifetime and/or reduce its sensitivity.5.2 Adjustments5.2.1 IntroductionAdjustment of the detector must be performed at regular intervals as required by nationalstandards or regulations (e.g., EN 378, ASHRAE 15, BREEAM, etc.).Breathing Hazard: Calibration gas MUST NOT be inhaled! See appropriate Safety DataSheets. Calibration gas should be vented into a fume hood or to the outside of the building.Zero First, Then Span: For proper operation, never adjust the span before completing a zeroadjustment. Performing these operations out of order will cause faulty calibration.IMPORTANT: Bacharach recommends calibrating detectors within theapplication-specific condition and with target gas. This method of zeroing thedetector in the application environment and performing a target gas calibration ismore accurate. A surrogate gas calibration may only be performed as analternative if a target gas calibration is not possible.IMPORTANT: The sensor should be fully stabilized (at least 2 hours, preferably24 hours).IMPORTANT: When entering the functions for zero or span adjustment, thedetector will automatically enter OFFLINE mode, and will remain OFFLINE untileither the OFFLINE mode is canceled by tapping the respective magnetic switch,or the OFFLINE mode times out within 6 minutes (typical) after the adjustmenthas ended.