TechnipFMC 4728 Bedienungsanleitung
Water Cut Monitor
Bulletin MNIN003 Issue/Rev 0.0 (5/19)
Installation / Operation Manual
4528 Detector, CX-645 Probe,
CSA Approved 4728 Monitor
MANUAL
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Installation / Operation Manual
Table of Contents
Introduction................................................................................................................................................................................... 5
Specifications ............................................................................................................................................................................... 5
Percent Water Set Point ............................................................................................................................................................... 6
Time Delay ................................................................................................................................................................................... 6
Analog Output............................................................................................................................................................................... 6
4728.............................................................................................................................................................................................. 7
Model 4528 Detector – Types A, B, and C ................................................................................................................................... 8
Wiring Diagram............................................................................................................................................................................. 9
4-20 mA Loop ............................................................................................................................................................................. 10
Internal Powered................................................................................................................................................................. 10
External Powered................................................................................................................................................................ 10
Typical Applications .................................................................................................................................................................... 12
Typical Tank Flow Diagram......................................................................................................................................................... 13
Detector Calibration – 4528 0-5 VDE Output ............................................................................................................................. 14
Detector Calibration – 4528-X A with 4-20mA Module Mounted "Piggy Back" on Detector Card............................................... 15
Detector Information – Type B and C ......................................................................................................................................... 17
Installation Hints ......................................................................................................................................................................... 17
Troubleshooting.......................................................................................................................................................................... 18
Recommended Spare Parts ....................................................................................................................................................... 18
4728 with Explosion-proof Enclosure – Dimensional Drawing ................................................................................................... 19
4728 with Weather-proof Enclosure – Dimensional Drawing ..................................................................................................... 20
CX-645 Probe – Dimensional Drawing....................................................................................................................................... 21
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Installation / Operation Manual
Introduction
The 4728 S & W Monitor used in conjunction with a Model 4528 Detector Card and Model
CX-645 Probe, provides continuous on-line monitoring of percent water in crude oil.
The monitoring system measures changes in the product stream capacitance. The di-
electric constant (Dk) (a key factor in capacitance measurement) of the product stream
changes dramatically as water content varies. The change in capacitance is accurately
measured and correlated to percent water by calibration against “shake out” data.
The Model 4728 displays the percent water on a digital indicator and indicator status
lights continuously display the conditions measured by the system. Alarm relays and
a 4-20 mA output can be used to connect the system to other supervisory or control
elements.
Specifications
Input Power
115 VAC +/- 15%, 50/60 Hz, 2 watts
220 VAC (Optional)
14-28 Volts DC @ 130 mA
S&W Range
0-5%, 0-10%, or 0-20%
S&W Alarm Setpoint
0-100% of S&W Range
Input Signal
0-5V DC from 4528 Detector
Indicators
S&W / Setpoint LCD
Merchantable Oil LED, -Green
Excess S&W LED, -Red
Bypassing Oil LED, -Yellow
Outputs
4-20 mA analog
Relays
SPDT Relay, 10 Amp 250 VAC
1/2 Hp 250 VAC, 13A 120 VAC resistive
1/3 Hp 120 VAC, 10 A 30V DC resistive
Time Delay
0-90 seconds adjustable in 10 second steps.
Off delay approximately 10% of on delay time.
Temperature Range
-20°F to 160°F (-29°C to 71°C)
Enclosure
NEMA 4X, Fiberglass, water resistant
NEMA 7, Explosion Proof
Description Part Number
81001114
81001115
81001164
Percent Water Set Point
The Digital Indicator on the Model 4728 displays percent BS&W. The setpoint (BS&W
Limit) can be observed by moving the percent BS&W/Setpoint switch to the lower or
setpoint position. If it is desired to change the setpoint, rotate the setpoint adjust knob
until the new limit value is displayed. The switch must be held in the lower position while
performing this adjustment. When the switch is released the indicator will display the
percent water.
Time Delay
The delay that occurs between excess BS&W indication and bypassing, relay
transfer, is determined by the position of the time delay switch. The time is adjustable from
0-90 seconds in 10 second steps. The off delay, excess BS&W to merchantable oil, is
approximately 10 % of the on delay (30 sec. on, 3 sec. off).
Analog Output
The analog output is 4-20 milliamperes corresponding to 0-5%, 0-10%, 0-20% depending
on unit range. The 4-20 mA output function is accomplished by the use of a precision
integrated circuit. The 4 mA point may be adjusted slightly with the zero control on the
Model 4728. The 20 mA point is factory preset.
The Model 4728 utilizes a loop switch to determine whether the 4-20 mA loop will be
self powered or powered by a remote supply. In the internal mode the unit will drive
4-20 mA through a maximum loop resistance of 600 ohms. Loop resistance values of
>600 ohms are possible with an external power source.
In the external mode the current loop may be powered from an external power supply
(40 volts max.) through a 3 wire circuit. Maximum loop resistance will be
R loop = Vp - 13.5
.02
where Vp is the power supply voltage.
Note: Under no condition should power be applied to the “+” or “-” 4-20 mA terminals.
Circuit damage will occur. See page 7 for hookup.
Installation / Operation Manual
Installation / Operation Manual
4728
The functions and locations of these three blocks on the P.C. card are as follows:
(a) Left side - 110 V AC power input
(b) Bottom - Relay contacts
(c) Right side - Detector card connections, 4-20 mA hook-ups and 24 V DC power input
for DC operation of the 4728.
Note: Switch S1 which is located at the lower right of the P.C. card. The position of this
switch determines whether the 4-20 mA output is to be internally powered from the
4728, or externally powered from an outside source. Care must be taken to be sure
this switch is in its proper position BEFORE an external 4-20 mA loop power source
is connected. Failure to have the switch in the proper position may cause component
The function and operation of all other controls on the 4728 are as described in the
manual.
Installation / Operation Manual
Model 4528 Detector – Types A, B, and C
The Model 4528 Detector mounts in the explosion proof conduit on the capacitance
probe. It converts water changes in the oil flowing through the probe to an output volt-
age that varies with the water.
The output will be 0-5 volts regardless of the range of the detector (i.e. 0-5%, 0-10%,
0-20%). To mount the detector in the condulet the top aluminum plate must be removed.
This can be accomplished by removing the three screws marked “A” in the above draw-
ing and gently lifting the top plate off of the printed circuit board. Find the short white
or red wire with the clip on it and gently pull the wire straight up. Remove the nut from
screw “B”. Insert the printed circuit board into the condulet. Position the board so the
rod sticking up from the probe goes into the round hole on the printed circuit board,
just below the “Probe” - “Ref” Switch. Center the P.C. Card over the mounting holes
and insert screw “B”. Push the clip on the end of the white or red wire down firmly on
the rod coming up from the probe. Rotate the clip if necessary. Replace aluminum top
plate by using the three screws marked “A” on the drawing.
Wiring Diagram
Note: Spade Lugs are not used on CSA Approved Model 4728.
Note: Typical Interconnecting cable between Detector and Readout.
Maximum recommended length is 300 feet.
Installation / Operation Manual
Installation / Operation Manual
4-20 mA Loop
Warning: Loop Switch MUST be up in external position BEFORE connecting external
power on 4728 with bottom terminal strip. Loop Switch MUST be up before connecting
external power on CSA Approved Model 4728 with the two sides and bottom terminal
strips.
Dieses Handbuch passt für folgende Modelle
4
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