Detcon FP-100 - Manual (Page 17)

Model FP-100
FP-100 Instruction Manual Rev. 0.0 Page 13 of 30
3. Operation
The Operator Interface of the Model 100 Series gas sensors is accomplished via two internal magnetic
switches located on the left and the right of the sensor (Figure 15). The two switches, labeled “PGM1” and
“PGM2”, allow for complete calibration of the sensor. The addition of the 100 Series Display allows the
ability to calibrate the sensor without the need to de-classify the area or the use of hot permits.
Figure 14 Magnetic Programming Tool
The magnetic programming tool (Figure 14) is used to operate the magnetic switches. Switch action is defined
as momentary contact and 3-second hold. Hold time is defined as the time from the point when the magnet is
placed in close proximity with the switch. For momentary contact the programming magnet is briefly held
over a switch location. The location of “PGM1” and “PGM2” are shown in Figure 15.
DETCON, INC.
LEL
100 %
FP-100
Program 1 Program 2
Figure 15 Magnetic Programming Switches
3.1 Normal Operation
In normal operation, the mA output will be the current sensor reading. The 4-20mA current output linearity
corresponds with the full-scale range. If the 100 Series Display option is added to the sensor, the display
continuously shows the current sensor reading in 0~100% LEL (Lower Explosion Level), which will normally
appear as “0”. If the sensor is actively experiencing any diagnostic faults, the mA output will be taken to 0mA
to designate a fault to the controller. The 100 Series Display will display an error code to signify a fault. Error
codes are noted by Fxx, where F is Fault and xx is an error code. Error codes are defined is section 5
Troubleshooting Guide.