Detcon DM-600IS - Manual (Page 7)

DM-600IS
DM-600IS Instruction Manual Rev 1.5.9 Page 3 of 37
Figure 1 Construction of Electrochemical Sensor
1.2 Universal Microprocessor Control Transmitter Circuit
The control circuit is microprocessor based and is packaged as a universal plug-in field replaceable module,
facilitating easy replacement and minimum down time. The universality includes the ability to set it for any
range concentration and for any gas type. These gas and range settings must be consistent with the IS Sensor
Head it is mated with. Circuit functions include a basic sensor pre-amplifier, on-board power supplies,
microprocessor, back lit alpha numeric display, fault, alarm, and calibration status LED indicators, magnetic
programming switches, an RS-485 communication port, and a linear 4-20 mA DC output.
Figure 2 Universal Microprocessor Control Transmitter Circuit