Teledyne 6600 manual System Description

Part III Model 6600

sample (selected for total oil or non-dissolved oil applications based upon valve V4 position).

The zero water may be supplied to the measuring cell by the existing process available pressure, by a user gravity feed system or by a pump (user supplied at the take-off) or by TAI either remotely at the takeoff source or within the analyzer sampling system. Normal measuring mode flowrates (commonly are 100-1000 liter/minute) will render response times of under 10 seconds typically for 90% FSD (this does not include any lag-time associated by the fast loop in the system). Each system may be slightly different depending upon components used (see B71046 piping), but generally the system is quite fast and many times can be tailored to meet fast response requirements.

The 6600 timer will now activate the auto zero circuit and correct the meter and recorder to read the zero level previously set to the true absolute zero for the process fluid.

If the output of the subtractor remains as it was on the preceding zero cycle, then no correction of the auto zero circuit is required. This means that no background change has occurred during the past hour.

When the output of the subtractor is other than the previous zero cycle value, the Auto Zero circuit would compensate for the difference, resulting in zero volts at its output. This zero voltage, applied to the input of the Sample and Hold/Buffer circuitry.

The 6600 then (optionally) can insert a manual or automatic employed span flag that simulates an upscale reproducible calibration analyte of interest.

This function adds another 10-20 seconds to the zero/span check/correc-

tion.

After auto zero/span is taken all solenoid valves are de-energized with the following consequences:

1.The sample is delivered to the sample cell for the next 55 min. The instrument has returned to the sample cycle and the analyzer monitors the sample for oil.

3.0System Description

The oil-in-water analyzer is generally constructed as either an explosion-proof 6600Z or X Purge or general-purpose (Model 6600) unit, open rack or closed cubiclemounted. Anequipmentpanelisusedtosupporttheanalyzercomponents.

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