Teledyne 6600 manual 3.3Electrical Connections, 3.4The Sampling System, Part III, Oil in Water

Oil in Water Part III

The Display PCB: This board holds the VFD display and the LED

display, and carries the signals to and from the Operator switches on the door of the 6600.

The Main PCB: This board is mainly digital. The micro controller,

EPROM, RAM, and RS232 driver, as well as digital drivers for alarms, and valves are located here. There is an analog section where the ADC, DAC, 0-1 VDC output and 4-20 mA modules are located.

3.3Electrical Connections

There are no electrical junction boxes in the system; power, signal, failure alarm, and distribution connections are made to terminal blocks located inside the control/analysis unit housing. Refer to the Interconnection and Wiring Diagrams at the rear of the manual for details, and chapter of part 1 of this manual.

3.4The Sampling System

3.4.1Sample Water Preconditioning System

The sample water preconditioning system prepares the sample for analysis on a continuous basis. The sample is homogenized (when range is above 20ppm Oil) so that any undissolved oil fraction will be uniformly dispersed into solution along with the dissolved oil fraction of the sample prior to presentation for analysis. Sample pressures ranging up to 150 psi can be accommodated. The control manifold has a utility water connection selected by a 3-way valve and inlet port, so that the sample line can be periodically flushed to clear it of accumulated debris. The untreated sample flows to a high-shear homogenizer whose purpose is to break up undissolved oil fractions in the sample into droplets so small that they literally appear to be in solution. This conversion permits the energy generated at the 254nm measuring wavelength to be absorbed by oil that would otherwise appear opaque when presented for analysis.

Output of the homogenizer is delivered under a controlled flow for proper homogenization of the sample water. The homogenized sample is delivered to the analysis sample cell or through the cell from the auto-zero filter assembly(s).

During the Sample Analysis Cycle, all solenoid valves are de-energized. SV3 is N.O. and permits the sample to be delivered to the sample cell.

Teledyne Analytical Instruments Part III: 1-11