Teledyne 6600 manual Signal Outputs, Recorder Requirement

Part III Model 6600

Particulate laden, turbid, dirtier waters where algae, bacteria, etc., could collect on the sample cell windows, such as:

1refinery effluents

2ponds

3stagnated effluents

4oil chemical separators, etc.

In these applications, in addition to the normal autozero liquid functioning, the backflushing can be used preceding the liquid autozeroing by momen- tarily actuating when optioned the two solenoid valves sv1 and sv2 across

the sample cell for about 15 seconds before the zero liquid is allowed to

enter the sample cell for background non-organic compound corrections. The preset open period of the solenoid valves (approximately 15 seconds) is sufficient to provide a stream of air to the sample cell inlet port at the begin- ning of each zero cycle. This jet air evacuates the process water and any collected residue from the sample cell once each hour, vastly reducing the maintenance that would otherwise be required to keep the cell free of algae and other debris. The cell inlet/outlet ports are designed with proper sample inlet/outlet angles across the sapphire windows (non-scratching) thereby creating high velocity and turbulence both in the normal measuring liquid stream mode and also during the backflushing cleaning and/or autozeroing

modes described above.

3.5The Signal Outputs

The standard signal output of the analyzer is 0-1 volt located on the control unit Interface Board.

The current outputs of the analyzer are isolated 4-20 mA.. The circuit adjustment procedures the described on section 3, part 1 of this manual.

3.6Recorder Requirement

The system requires a recorder with input sensitivity which matches the specified system signal output.

Instruments with floating (ungrounded) current outputs can be connected to any current input recorder.

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