Oil in Water | Part III | |
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Warning: Do not operate the “ultrasonic homogenizer” in the instrument for more than one (1) minute without a liquid sample properly flowing through the homogenizer.
HomogenizerTuning
Follow the procedure in the manual for the homogenizer set up. The final factor power settings obtained for a 200 ccm flow rate on this system (EPA#2 oil in demineralized water) was estimated at 600 pot dial or 60% power (approx. 50 watts being used). To arrive at the field calibrated power homog- enizer value based upon the unit being calibrated with the customer crude oil in process water, the homogenizer will have to be recalibrated in the field since the power setting will be different for the customers oil and water than for what TAI calibrated it for using EPA#2oil in demineralized water at the 200 ccm flow rate.
A representative collected process sampleis pumped throughthe analyzer that has been field calibrated using the cal kit blender, etc., (p/n A48715) as outlinedinthismanual.Thiscollectedsampleofprocesswaterisagainblended for two minutes the same as the calibration samples and entered into/through the calibrationreservoirthroughthesamplecell.Thereadingisnoted/recordedand thereafter, the homogenizer power levelon the same process fluid (within ashort time period from a steady state sample coming in) is tuned to the same reading astheblendedsamplereadingrecordedvalue.Thehomogenizerinstrument power level is again recorded for this 6600 unit. Note the flowrate through the homogenizer is also recorded. (It should typically be recorded while the flow is controlledat200cccforanyfuturecalibrations.(Thisflowratewillgivethemost acceptableresponsetimesthroughthesystem).
CORRELATION
5.7System Set-Up For Automatic Operation
5.7.1Set-up for Automatic Sampling
After calibration with prepared samples, the system must be prepared for automatic sampling.
1.Insure that sample delivery system was checked per Section 5.4.
2.Close the utility water supply valve used for external sample line flashing.
Teledyne Analytical Instruments | Part III: |
