TechnipFMC 4528, Руководство по установке и эксплуатации

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Page 14 • MNIN003 ║ Issue/Rev. 0.0 (5/19)
Installation / Operation Manual
Detector Calibration – 4528 0-5 VDC Output
In July 1993 the 4528 Detector was changed to no longer have a negative output. An empty probe or low Dk will
cause the unit to read zero. A shortened probe or a probe full of water will read bad oil. The coarse and fine adjust-
ments were changed from variable capacitors to 25 turn pots. The single four point terminal strip on the bottom of
the P.C. Card was changed to two colored two point connectors.
Calibration 4528 Detector 0-5%
1. Connect power and probe detector chassis/indicator unit as shown on the interconnecting wiring diagram.
2. Turn on power/system to cause oil to flow through probe. Allow flow to stabilize.
3. Take grindout of water in oil. For calibration purposes the oil should preferably have less than 1% water in it.
4. Apply power to Model 4728 indicator unit. Ignore lights until calibration is complete.
5. A. 4528 Detector
1. Set probe/ref. switch at top of chassis to probe position.
2. Set DC volt meter on 0-10 volt scale. Insert leads into test jacks on detector face or watch digital
readout on face of Model 4728 indicator unit.
3. Turn the fine zero (marked ZERO F) clockwise (CW) 25 turns until the pot is fully CW. Full clockwise
is indicated by a “clicking” feel and sound when the pot is turned.
4. Turn the fine zero back counter clockwise (CCW) approximately 10 turns.
5. Turn the coarse zero pot (marked ZERO C) 25 turns full counter clockwise. Listen for clicks.
6. Turn the coarse zero CW until the reading is at or near the grindout value. Do not tune through zero.
Always approach the grindout value from the CW direction.
7. Next, turn the fine zero to get complete agreement of the displayed reading to the grindout value.
For example if the grindout was 0.3, then the volt meter/indicator should read 0.3.
Note: Due to calibration differences, the volt meter and indicator readings may not read exactly the same.
8. Move Probe/Ref. switch to Ref. position.
9. Adjust span control to make reading show 5.00 higher than the grindout. (i.e. if grindout was .3 span
control is adjusted to show reading of 5.30.)
10. On a 10% Detector turn COARSE/FINE tuning adjustments as required to make voltmeter read 1/2 the
water cut.
11. On a 20% Detector turn COARSE/FINE tuning adjustments as required to make voltmeter read 1/4 the
water cut.
Remove volt meter. Move Probe/Ref. switch to probe position.
6. A. 4728 Readout Unit
1. Pull and hold the S&W/Set Point Switch down. Turn set point adjust knob to obtain reading at which
monitor is to divert. Release switch.
2. Turn the time delay switch in lower right with a small screwdriver to set time delay for output relay to
actuate after excess S&W light comes on. Multiply number in window above screwdriver slot by 10 to
get time delay in seconds.
7. Calibration is complete.