Teledyne T100, Инструкция по эксплуатации, Страница: 98 / 404

Operating Instructions Teledyne ML - T100 UV Fluorescence SO2 Analyzer
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4.6.8. 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 6.7.7.? 6.7.8?
2. Select the range: Use the procedures in Section 6.7.4
– 6.7.6. 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 C.3
PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
SETUP C.3 RANGE CONTROL MENU
MODE
SET UNIT DIL EXIT
DIL only appears
if the dilution ratio
option has been
installed
SETUP C.3 DIL FACTOR: 1.0 GAIN
0 0 0 1 .0
ENTR EXIT
Toggle these keys 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 C.3 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 4-15: SETUP RNGE
– Dilution Ratio