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Equipment |
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UFS - Universal flow sensor |
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Cleaning Consultancy Delft bv. has developed a Universal Flow Sensor
(UFS) to check the water flow of e.g. a continuous batch washer.
By measuring and controlling the flow it is possible to improve
process stability and save on your water- and energy-usage.
The UFS will give your company a more reliable process control whereby
you don’t have to check several times a day the water flow.
The sensor is implemented on existing flow meters (rota meters) |
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Operation principle |
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A microprocessor-controlled sensor will be placed on an existing flow
meter. The sensor measures the position of the float in the flow meter. The data of
the sensor will be sent as a current-loop signal to a
frequency-converter that controls the water flow.
The pump or
valve can be continuously adjusted based on the measured value of
the sensor. Unique is the possibility to connect this sensor to a PC for
reading out the measured value and programming or calibration of the
sensor. |
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Advantages |
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The process is automatically controlled, so visual checks of the
flow meters can be reduced largely.
If there is a:
- blockage of the water supply
- too low or too high flow
- fault in the installation
this can now be sensed and directly corrected or signalled.
The UFS not only offers the possibility for savings on energy and
labour costs, but also improves the reliability and process
stability.
With this sensor your system needs less maintenance.
Hereby:
- the existing flow meters can be maintained
- only the placement of the sensor is required
- visual checks remain possible
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PC-connection |
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With a standard RS232 interface, or optionally with an USB-converter, you
can read-out, adjust or calibrate the flow sensor.
Parameters, which can be read-out, are:
- flow in m3/h
- flow in %
- status of the sensors
The user can program the next parameters:
- range of the flow meter
- type PC-output (see above, combinations are possible)
- calibration values
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Costs / benefits |
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The price of frequency converters is strongly decreasing and the energy price is increasing. The consequence
is that the payback time becomes shorter. The payback time is
according to suppliers of frequency converters in most of the cases
1 to 1½ year.
You will also benefit of other possible advantages such as lower water
and energy usage, reduced wear, lower
maintenance costs for pumps, sound reduction and savings on labour hours for
inspection of the flow meter.
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Converting existing flow meters |
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For existing flow meters CCD offers a conversion service. The float
of existing flow meters must be adapted. With this adaptation a
magnet is placed in the float and then sealed hermetically.
Because of this service it is not necessary to buy a complete new
flow meter for use with the UFS.
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Specifications |
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| UFS |
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| Dimensions ((lxwxh) |
200x20x20 mm |
| Fixation |
2x M5 (165 mm h/h) |
| Standard length
connection cable |
2,5 meter |
| Minimum input power supply |
9 Vdc |
| Maximum input power supply |
24 Vdc |
| Recommended input power supply |
24 Vdc |
| Maximum current UFS
(excl. current loop) |
ca. 8 mA |
| Average current
(excl. current loop) |
ca. 5 mA |
| Connections |
V+ and ground (for power supply and comm)
Loop in (+) and Loop out (-)
RX, TX |
| Current loop |
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| 4 - 20 mA Loop |
Optical separated, loop powered |
| Maximum load of the current loop |
1,2 Kohm |
| Maximum input power supply |
35 Vdc |
| Recommended loop voltage |
24 Vdc |
| Quiescent current of the
current loop |
1 mA |
| Maximum programmable output
current |
25 mA |
| Maximum current with faulty
loop-regulator |
35 mA |
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| Sensors |
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| Maximum distance between
sensors and magnet of the float |
approx. 6 cm (from sensor side of the UFS
to the centre of the magnet) |
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