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Operating Instructions Teledyne API M100E Analyzer Operation Manual
92
6.7.8. DILUTION RATIO
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. Using the dilution ratio option is a 4-step process:
1. Select reporting range units: Follow the procedure in Section 6.7.7.
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 F
A
CTOR: 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 6-15: SETUP RNGE – Dilution Ratio
The analyzer multiplies the measured gas concentrations with this dilution factor and displays the result.
NOTE
Once the above settings have been entered, the instrument needs to be recalibrated using one of the
methods discussed in Chapter 8.
04515F DCN6048