Calibration - Slope And Offset; Temperature And Pressure Compensation (Tpc) Feature - Teledyne T100 Instruction Manual

Teledyne ML - T100 UV Fluorescence SO2 Analyzer

9.7.2. CALIBRATION - SLOPE AND OFFSET

SAMPLE RANGE = 500.000 PPB
< TST TST > CAL
SAMPLE TIME = HH:MM:SS
< TST TST > CAL
SAMPLE PMT TEMP=0.0C
< TST TST > CAL
SAMPLE BOX TEMP=0.0C
< TST TST > CAL
9.7.3. TEMPERATURE AND PRESSURE COMPENSATION (TPC)
FEATURE
amount. Second, the instantaneous concentration must exceed the average in the long
filter by a portion, or percentage, of the average in the long filter.
If necessary, these filter lengths of these two modes may be changed to any value
between 1 and 1000 samples. Long sample lengths provide better signal to noise
rejection, but poor response times. Conversely shorter filter lengths result in poor signal
to noise rejection, but quicker response times.
Calibration of the analyzer is performed exclusively in software. During instrument
calibration (refer to Sections 6 and 7) the user enters expected values for zero and span
through the front panel touch-screen control buttons and commands the instrument to
make readings of sample gases with known concentrations of SO
are adjusted, linearized, and compared to the expected values as input. With this
information the software computes values for instrument both slope and offset and stores
these values in memory for use in calculating the SO
Instrument slope and offset values recorded during the last calibration can be viewed by
pressing the following control buttons sequence
SO2 =XXX.X
SETUP
SO2 =XXX.X
SETUP
SO2 =XXX.X
SETUP
SO2 =XXX.X
SETUP
Figure 9-25:
As explained in the theory of operations (refer to Section 9) changes in temperature can
significantly affect the amount of fluoresced UV light generated in the instruments
sample chamber. To negate this effect the T100 maintains the sample gas at a stable,
raised temperature.
Pressure changes can also have a noticeable, if more subtle, effect on the SO
concentration calculation. To account for this, the T100 software includes a feature
06807A(DCNxxxx)
SAMPLE
< TST TST > CAL
SAMPLE
< TST TST > CAL
SAMPLE
< TST TST > CAL
SAMPLE
< TST TST > CAL
Calibration Slope and Offset
Theory Of Operation
. The readings taken
2
concentration of the sample gas.
2
RCELL TEMP=0.0C SO2 =XXX.X
HVPS 553 VOLTS SO2 =XXX.X
OFFSET=XX.X MV SO2 =XXX.X
SLOPE=XXX SO2 =XXX.X
SETUP
SETUP
SETUP
SETUP
2
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