MSA S5000 - Advanced Configuration and Communication; XCell Sensor TruCal Operation; 4.4 Settings Configurable via External Communication; 4.4.1 AO Custom Levels

XCell sensors with TruCal (HydrogenSulfide and CarbonMonoxide) calculate current sensor sensitivity using automated
pulse checks. The pulse stimulates the sensor with a response similar to having actual calibration gas applied. The stimulated
response is compared to the last calibration and will make adjustments to sensitivity to match the last calibration. When the
required adjustment is greater than the accuracy of the algorithm's adjustment, the sensor will call for a calibration.
All digital sensors, including catalytic bead and oxygen, will show life health status as 'Good' or 'Fair' with the
following calculation:
Good condition occurs when the current calibrated span sensitivity is greater than 50% of the way between the
initial calibration sensitivity and the end-of-life span sensitivity. Fair condition occurs when the current calibrated
span sensitivity is less than 50% of the way from the initial calibration sensitivity and the end of life span sensitivity.
NOTICE
Using expired calibration gas or the incorrect calibration gas can result in a premature "Fair" status.
4.4 Setting only configurable via Bluetooth
®
, Modbus, or HART
The following settings are only configurable through Bluetooth®, Modbus, or HART.
• AO Custom Levels
• Relay Zone – Horn Mode
• Unit Device ID/Tag
• Alarm Direction
• Alarm Enable/Disable
4.4.1 AO Custom Levels
S5000 offers three factory defined analogoutputs(AO) level sets, i.e., 0mA with HARTdisabled, or 3.5mA and 1.25mA with
HARTenabled. Users can also specify their own custom AOlevels for each transmitter mode. The MaintenanceAOlevel is
used during start up, ResetMainUnit, and TransmitterSettingsReset. Output setting for oxygen sensor calibration is not
configurable. All changeable settings can be modified through Modbus/Bluetooth/HART.
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4 Operation US