MODEL
EDPT-128
ELECTROSTATIC DEHYDRATION AND PRECIPITATION TESTER
(Click thumbnail for a detailed view)
APPLICATION
Utilized for the determination of water content of emulsions such as
encountered in crude oil processing , by means of the application of high
electrical potential across the fluid while under controlled temperature
conditions and prior to centrifuging.
DESCRIPTION:
This tester is a third generation model and incorporates several design
features which evolved from the earlier models. Principally, it is more productive by
allowing eight samples to be tested simultaneously and current values (mill amp)
for each test sample can now individually be maintained and recorded.
Basically, test samples are placed in special 7 in. (18 cm) long, 100 ml
centrifuge tubes with special O-ring sealed electrode caps. Tubes are then placed in a temperature
controlled aluminum block and allowed to stabilize. A unique cover assembly captures all
eight electrode caps and automatically makes the electrical connection through
spring loaded contact pins. High
voltage is then applied from a separate portable power supply for a
predetermined time period. The
application of this high potential causes the water molecules to align and
attract to one another, therefore forming water droplets which then precipitate
out of the emulsion.
Following are the principal features of the subject Tester :
Test Cabinet
1. Electrically heated aluminum block with eight precision contoured holes.
2. Digital Temperature Control Indicator.
3. Miniature blower and screened vent openings to supply forced cooling and eliminate fumes.
4. Bimetallic over-temperature safety switch for aluminum block.
5. High voltage contact assembly cover plate with independent leads for each tube. (eight pairs)
6. Ten assemblies of 100 ml centrifuge tubes with heavy duty thread and matching electrode cap assemblies. Circular electrode positioned at 75 ml level and center electrode positioned at 6 ml level.
7. Safety switch assures that high voltage can only be applies when contact plate is in place.
8. Power requirement is 120 Volts, 8 Amp.
Power Supply Cabinet
1. Eight high voltage transformers provide independent 3000 volt potential to each of the eight test cells.
2. Miniature blower to supply forced cooling for transformers.
3.
Control panel has following components :
a) Switches. Circuit Breakers and Pilot Lights.
b)
Variable Voltage Control.
c) Voltmeter, 0-3000 Volt.
d)
Two Ammeters; one to measure total
current and the other to measure
individual current of each cell via selector switch.
e) Interval Timer, 0-30 minutes. Rotation of timer knob to the desired timing interval energizes primary of transformer and timing motor. On release, the motor drives timer to zero and motor and transformer load de-energize.
CAPABILITY:
Number of Samples 8
Normal Sample Temperatures 50-90° C
Maximum Operating Potential 3,000 Volts
INSTALLATION NEEDS:
Test Cabinet 120 Volt - 8 Amp. - 50/60 Hz
Power Supply 120 Volt - 5 Amp. - 50/60 Hz
220 Volt SYSTEM AVAILABLE, Requires separate external step-down transformer.
Requires good and reliable electrical GROUND connections.
SIZE & WEIGHT:
Test Cabinet 10"x16"x12" High (25x41x30 cm)
Power Supply
10"x16"x12" High (25x41x30
cm)
Net Wt. 90 LB (41 Kg)
SHIPPING:
Boxed 28"x28"x28" (70x70x70 cm)
Gross Wt. Est. 120 LB (77 Kg)