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1.2. Default Values
The unit is shipped from the factory with the following default settings:
•
Output mode: Voltage
•
Full-scale value: 50PPM
•
Calibration gas : 50PPM
•
Test value: 50PPM
•
Warning level: 10PPM
•
Alarm level: 15 PPM
•
Zero Offset: 1 PPM (Zero Offset is optional and provided for some users)
1.3. New Features
The American Mine Research MC-4231-CO Modbus Sensor has all the features of
the earlier MC-4031 model and many more. Listed below are the new features of the
MC-4231-CO
sensor.
•
One PC board for both sensor and communications instead of two
•
Three rotary BCD switches for address instead of DIP switch
•
Addressable to 256 instead of 128
•
Four digit LCD display allows better resolution and range.
•
Sensor Cell ZERO calibration error and SPAN calibration error indication
•
Can serve as a small inexpensive remote with the following input/outputs:
♦
Two current sink type control outputs
♦
Two 0 to 3 VDC status inputs
♦
Two 0 to 3 VDC analog inputs.
