Molecular Property Spectrometer (LEL-MPS)
The LEL-MPS sensor is not intended for inert environments. Environments with oxygen (O2) levels below 18% will negatively impact this sensor’s accuracy and Blackline does not recommend using it when oxygen levels are below 10%.
The LEL-MPS sensor auto-zeros at start-up and must be started in clean air.
LEL-MPS sensors must be started in clean air and zeroed on start-up to
function properly. G7 devices equipped with LEL-MPS sensors cannot perform an
automatic zeroing of the LEL-MPS sensor without manual confirmation.
When powering on a G7 with an LEL-MPS sensor, the device prompts you to acknowledge and approve that the device is powered on in a clean-air environment and a zero adjustment can take place. If you fail to acknowledge the zero prompt within 15 seconds, the device enters a latched alarm state and requires that you power cycle the device and approve the zero prompt.
The clean-air confirmation prompt is configurable in Blackline Live. If the clean-air confirmation prompt is disabled, the device prompts you to perform a manual zero adjustment.
When bump testing or calibrating cartridges containing this sensor, Blackline recommends applying a gas mixture containing at least 18% oxygen (O2). Lower oxygen may impact the MPS sensor’s reading. If you have applied a gas mixture with less than 18% oxygen, power cycle your device.
You can calibrate your LEL-MPS sensor in two ways:
- Default calibration: The default calibration process will validate and ensure accuracy without adjusting the LEL-MPS sensor’s readings. Unlike traditional sensors, this sensor is factory-calibrated for optimal accuracy.
Blackline Safety recommends using the factory calibration for the lifetime of the sensor.
- Full calibration: Advanced users can perform a full calibration with a span adjustment. A full calibration may negatively impact the accuracy of other gases.
No known gases desensitize or contaminate Blackline’s LEL-MPS sensors. The sensor does not cause any electromagnetic interference (EMI), and is not negatively affected by EMI, such as radio transmissions, of up to 8W.
