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Operating Instructions Teledyne API Model T360/T360M Operation Manual
102
4.8.7. 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 (Section 4.8.6).
2. Select the range: Use the procedures in Sections 4.8.2 – 4.8.5. Make sure
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 10 ppm gas
can be used to calibrate a 1000 ppm sample gas if the span gas is not routed
through the dilution system. On the other hand, if a 1000 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 diluting
gas and 1 part of sample gas):
SAMPLE RANGE = 500.000 PPM CO2 =X.XXX
< 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 buttons to set the
dilution factor.
This is the number by which the
analyzer will multiply the CO
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.
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 Section 5.
07272B DCN6552