Teledyne 514 - NDIR analyzer - Manual (Page 36)

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4.0 Operations
Teledyne Analytical Instruments
A Business Unit of Teledyne Electronic Technologies
should have energized the instant power was established. The
device (or devices) should be energized because the mode switch
has been preset to the ZERO position.
4. If the test procedure was normal, the devices should have been
seen or heard to operate as described by personnel located at the
analysis section installation site, and no further check need be
made at this time. If operation is not as described, refer to
Troubleshooting in Chapter 5.0.
5. Check analyzer operation by completing the calibration
procedure described below in Calibration after allowing the
instrument to warm up. The electrical circuits take from 30 to
40 minutes to stabilize.
NOTE: It will take at least four hours for the analyzer to completely stabilize
with respect to temperature.
4.3 Calibration
Standardization Fluids
Two standardization fluids are necessary to calibrate the analyzer:
1. Zero Fluid:The zero standard fluid must have a composition
similar to the sample, and ideally, contains none of the
components of interest. The zero fluid should be laboratory
analyzed to determine its composition. The exact composition
must be known, as the accuracy of the analysis can be no better
than the your knowledge of the standardization fluid.
2. Span Fluid: The span fluid must be representative of the
sample fluid in composition (like the zero fluid), and contain a
measured quantity of the component of interest. The component
of interest content of the fluid should be in the region of 75% to
100% of the range of measurement. As with the zero fluid, the
accuracy of the system is dependent upon the your knowledge
of the span fluid composition. Ideally, the span sample should
contain 100% of whatever the instrument is set up to analyze.
Procedure
1. Introduce zero fluid (see above) into the sample cell. Flow liquid
samples into the cell at a flow rate of less than 50 ml/minute to
allow the sample preheater time to heat the sample up to the