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SETUP Menu Teledyne API - T100 UV Fluorescence SO2 Analyzer
98
5.4.5. DILUTION RATIO (OPTION)
The dilution ratio is a software option that allows the user to compensate for any dilution
of the sample gas before it enters the sample inlet. Once the degree of dilution is known,
add an appropriate scaling factor to the analyzer’s SO2 concentration calculation so that
the measurement range and concentration values reflect the undiluted values when
shown on the instrument’s front panel display screen and reported via the analog and
serial outputs.
Using the dilution ratio option is a 4-step process:
1. Select reporting range units: Follow the procedure in Section 5.4.4
2. Select the range: Use the procedures in Section 5.4. Ensure that the SPAN value
entered
is the maximum expected concentration of the undiluted calibration gas and
that the span gas is either supplied through the same dilution inlet system as the
sample gas or has an appropriately lower actual concentration. For example, with a
dilution set to 100, a 1 ppm gas can be used to calibrate a 100 ppm sample gas if
the span gas is not routed through the dilution system. On the other hand, if a 100
ppm span gas is used, it needs to pass through the same dilution steps as the
sample gas.
3. Set the dilution factor as a gain (e.g., a value of 20 means 20 parts diluent and 1
part of sample gas):
SAMPLE RANGE = 500.000 PPB SO2 =XXX.X
< TST TST > CAL SETUP
SETUP
PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
SETUP RANGE CONTROL MENU
MODE
SET UNIT DIL EXIT
DIL only appears
if the dilution ratio
option has been
installed
SETUP DIL FACTOR: 1.0 GAIN
0 0 0 1 .0 ENTR EXIT
Toggle to set the dilution factor.
This is the number by which the
analyzer will multiply the SO
2
concentrations of the gas passing
through the reaction cell.
SETUP DIL FACTOR: 20.0 GAIN
0 0 2 0 .0 ENTR EXIT
EXIT ignores the
new setting.
ENTR accepts the
new setting.
SAMPLE ENTER SETUP PASS : 818
8 1 8 ENTR EXIT
Figure 5-8: SETUP RNGE – Dilution Ratio
06807C DCN6650