Teledyne 6600 Operating Instructions Manual page 122

Part III
Span Filter
This instrument employs a synthetic optical filter that can be operated
manually or automatically which simulates the absorption characteristics of the
required span fluid.
After the analyzer has been zeroed and spanned with known compositions
of the appropriate calibration fluids, the span filter is setup for manual or auto-
matic operation when introduced with a zero prepared fluid in the cell (Note: this
fluid may be clean air or N2 for very clean water stream applications, i.e., clean
condensates) and the appropriate equivalent absorption recorded. Use this
setting for all subsequent auto calibrations involving the span filter.
Sample System
Please refer to all pertinent sections of the 6600 Oil in Water manual for
operation of the Oil in water analyzer and sample system.
The sample system and analysis system are described in this manual.
5.6.4 Calibration by Correlation with Laboratory
Analysis
Because of the nature of the analysis, and the unique manner in which it
is accomplished, laboratory confirmation is recommended, particularly where
initial calibration was accomplished with oil not actually recovered from the
sample water.
The laboratory analytical method employed must be capable of detect-
ing both dissolved and undissolved oil fractions in the sample. We recom-
mend EPA method 413.1 (Replaced by method 1664A, gravemetric using
hexane extracting solvent) for sampling and analyzing as mentioned in
section 1.0 of the introduction.
Meaningful determination of the system's capabilities requires precise
acquisition and processing of grab samples. Adhere to the following proce-
dures:
1. Insure that the system is functioning correctly as described
earlier in this manual.
2. Do not attempt to grab samples when the analyzer is indicating
drastic changes in oil concentration.
3. Draw two 1-gallon samples from the port for grab sample
opening V4 valve. Use clean containers, and fill alternately, not
1-32 Part III
Teledyne Analytical Instruments
Model 6600