Nmhc Calibration - TELEDYNE API N901 User Manual

5. Click Done to return to the Span Cal page.
6. Press the Span button to complete the calibration.
Note
NMHC C
Following the O2 Calibration (Section 4.2.1.1) and the Methane-only (CH4)
Calibration (Section 4.2.1.2), or any time the instrument drifts outside of
acceptable limits, it will be necessary to perform a span calibration for the
Methane and non-methane channels. This could be applied by using only
NMHC cylinder (Like Propane, or Benzene, etc..), or by using a blend gas
cylinder containing Methane and non-methane Hydrocarbon ( Like Propane).
Note that if a dilution calibrator is not used (i.e. span or check bottle), the bottle
should be balanced in Air. If using a dilution calibrator, the bottle may be
balanced in Air or nitrogen.
4.2.1.3.1 NMHC C
1. Start sampling the NMHC sample with 80% of the target range, allowing it to run at
2. In the Calibration > Span Cal and press the Start button.
3. Click the "Set Span Target" button.
4. In the Span Target page, check the NMHC box and ensure that the CH4 box is
5. Click the blue button for the NMHC concentration, input the target gas value and
6. Click the blue button for the carbon count (CC), input the carbon count of the NMHC
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The CH4, NMHC, and THC values will not immediately be
updated to the new calibrated concentrations until after the
completion of a full measurement cycle following this span
adjustment.
ALIBRATION
ALIBRATION WITH
least 10 minutes to help improve calibration accuracy.
unchecked.
click Enter.
gas, and press Enter. As an example, enter 3 for Propane (C3H8). This value will
ensure the NMHC channel is calibrated for ppbC (parts per billion carbon).
(Example for 500 ppb Propane and 3 ppb Carbon)
Teledyne API N901 HC Analyzer
NMHC-O C
NLY YLINDER
092910910A DCN8375