FS-9006OM
– REV K
8
The Flame Tracker™ is connected to the controller as a typical two wire current transmitter. It can be operated
from any well-filtered dc supply from 12 volts to 30 volts. The supply should be capable of supplying 100
milliamps. The power supply must be protected to prevent the supply voltage from exceeding 30 volts in normal
use and more than 42 volts under transient conditions. The sensor is protected against reverse polarity. The
maximum value for the sense resistor plus the wire resistance is dependent on the supply voltage. At 24 volts
this value is 560 ohms. Resistance values for other voltages can be determined from the chart in Figure 2.
3.3 CONNECTOR PINOUT
The pinout for the power connector is as follows:
CONNECTOR LEGEND
PIN
CIRCUIT
DESIGNATION
WIRE COLOR for
RS-E2-0279PXXX cable
A
-
Black
B
+
Red
C
Ground
Green
D
Not Used
E
Not Used
3.4 SENSOR CHECKOUT
Disconnect the sensors and unscrew them from the turbine. Plug the sensor cables back in to each of the
sensors. Apply power to the sensors. Check the current values at the controller for each of the sensors. The
sensors are sensitive to light, and may have some reading, depending on the ambient light level. Test each
sensor by covering the port to see zero flame intensity signal, and with a flashlight to see a positive reading.
With no light the reading should be 3.7 to 4.1 milliamps, while with most flashlights the reading should be above
8 milliamps. An LED flashlight may not work for this application. Variations in flashlight type, strength, or battery
voltage may cause variations in signal output. The flashlight test is intended as a field test for general
functionality only and is not a controlled or quantitative test. If a sensor is outside these rough check limits see
Section 5.0.
Disconnect the sensor cables, and reinstall the sensors according to the instruction in Section 3.1. At this time
step 2 of Section 3.1 should be completed and the sensor cables reconnected. Make sure that the sapphire
window is clean; if it needs cleaning, do this according to the maintenance instructions in Section 4.0. Check
that all sensors are reading between 3.7 to 4.1 milliamps.
3.5 CONTROLLER SETUP
The Flame Sensor provides a minimum output of 5 milliamps when exposed to the minimum flame intensity
specified in GE specification number 362A1052. The set point for flame off should be set to 6.25%, which is
equal to 5 milliamps. The set point for flame on should be 10% of full scale, which equals 5.6 milliamps. If the
intensity levels are too low for these settings there may be other problems. Low intensity levels may be a sign
of other problems. Refer to Section 5.0 - Troubleshooting.
