Instruction Manual
4.OPERATION
4.1 Introduction
Under normal conditions the sensor module does not require operator or technician intervention. The fol- lowing are conditions under which the module requires attention:
-Routine periodic calibration.
-Calibration after a high gas alarm.
-Sensor replacement on a planned schedule or when a sensor failure occurs.
-Periodic cleaning as necessary.
-Unanticipated maintenance.
4.2Signal Value
During normal operation the current loop of the sen- sor module and the controller will be between 4 mA indicating no presence of gas, and 20 mA indicating that the full scale concentration of gas is present. The signal value is proportional to the concentration of gas present.
FAULT /KEYPAD
MODEL
Combustibles % LEL
Unity | SPAN | ZERO |
|
|
|
Ph.
Milpitas, CA
CAL
FAULT /KEYPAD
MODEL
H2S PPM
Unity | SPAN | ZERO |
|
|
|
Ph.
Milpitas, CA
CAL
Figure 4.1
Transmitter Cover Plate
Page: 4 | Model 4105 Gas Sensor Module (12/02) |
