HF scientific Oil Content Bilge Alarm - Manual (Page 9)

Bilge Alarm (02/02)
Rev. 1.3
XIV. REPLACING SENSING MODULE
MEASUREMENT DETECTOR (Refer to Figure 7)
1. Turn OFF the Power Switch at the Indicating/
Control Module
2. Remove the four screws in Sensing Module End
Cap and remove the Sensing Module End Cap.
3. Cut wires at positions #5, #6, and #7.
4. Remove the brass Measurement Detector Cap,
located on the side of the sensor.
5. Remove the Measurement Detector Spacer.
6. Remove the Measurement Detector Assembly
including wires cut in step #3 above.
7. Install the replacement Measurement Detector
Assembly by feeding the wire of the assembly
though hole.
8. Carefully seat Measurement Detector in position.
9. Replace Light Detector Spacer and brass cap.
10. Solder three wires attached to Measurement
Detector to lugs on position #5, #6 & 7 (black wire
to #5, shield wire to #6 and red wire to #7).
11. Replace Sensing Module End Cap.
12. Turn ON the Power Switch at the Indicating/Control
Module and ensure that the Bilge Alarm is
responding correctly to changes in oil concentration.
13. This completes the Measurement Detector
replacement. Proceed to Section VII (Calibration)
and perform calibration as described.
XV. REPLACING SENSING MODULE FAILSAFE
LIGHT DETECTOR (refer to Figure 7)
NOTE: The Light Detector is a failsafe feature which
draws attention to lamp burn-out or opaque
obstruction conditions and will not normally need
replacement during the life of the instrument).
1. Turn OFF the Power Switch at the Indicating/
Control Module.
2. Remove the four screws in Sensing Module End
Cap and remove the Sensing Module End Cap.
3. Cut the black and red wires at positions #3 and #4
and shield wire at position #2.
4. Remove the four screws in Light Detector Cap
located on opposite end of the Sensing Module and
remove Cap.
5. Remove Light Detector Spacer.
6. Remove Light Detector Assembly including wires
cut in #3 above.
7. Feed the three wires on the replacement Light
Detector Assembly through to positions #2, #3, and
#4.
8. Place replacement Light Detector Assembly and
Spacer in position and replace the Light Detector
Cap with the four screws previously removed.
9. Solder three wires attached to Light Detector
Assembly to lugs on positions #2, #3, and #4,
(shield wire to #2, black wire to #3, and red wire to
#4).
10. Replace the Sensing Module End Cap and Light
Detector Cap.
11. Turn ON the Power Switch at the Indicating/
Control Module and ensure that the Bilge Alarm is
in the normal condition with clean water in the
Sensing Module. Insert opaque object in Sensing
Module Flow channel to block light to Light
Detector to ensure that the Bilge Alarm goes into
the Alarm Condition.
12. This completes the Failsafe Light Detector
replacement procedure.
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