CHAPTER 3, CALIBRATION
98307600 Rev. C-1 3-9
1. Connect the flowmeter to the analyzer sample inlet and measure the sample
flow reading. Record the average of flow readings and ensure that it meets the
specifications of section 1.1.10 ±1%.
2. Setup the dilution gas calibrator to obtain a CO gas concentration of 80% of
the EC9830’s operating range as discussed in section 3.2.1.4. Perform a
manual calibration at this point.
Note
Record the analyzer instruments gains before and
after the calibration.
3. Setup the dilution gas calibrator to obtain Zero air, and ensure that the
EC9830 has a zero reading lower than ±5ppb NOTE: Perform a background
otherwise and repeat step 2.
Note
Do not make any further span adjustments during
the remainder of the calibration. Record the new
span values in the spreadsheet.
4. Generate 5 additional concentrations by decreasing F
SO2
or increasing F
D
. Be
sure the total flow exceeds the analyzer’s total flow demand. For each
concentration generated, calculate the exact CO concentration using 3.2.1.4
Note
The recommended multipoint span concentrations
are: 20, 40, 60, 80, 100% of Full Scale @ minimum
of 1LPM.
5. Record the concentration and the analyzer’s response for each concentration
after a stabilization period of 15 minutes per point.
6. Plot the analyzer’s responses versus the corresponding CO concentrations and
draw or calculate the calibration curve as discussed in the following section.
3.2.2.4 Calculating Multipoint Calibration Results
3.2.2.4.1 Manual Calculations (Used when Excel not available)
Determine the percent difference between instrument response and the calculated
concentration using the following equation.
To Next Page
Loading...
