Teledyne 100AH instruction manual Concentration Units

Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D

5.3.4.4 Concentration Units

The M100AH can display concentrations in PPM, mg/m3. Coefficients for mg/m3 were based on 0°C (25°C for U.S.EPA), 760 mmHg. Different pressure and temperature can be used by adjusting values entered for calibration gas to read the correct concentration at the conditions being used. This adjustment is not needed if units are within the same type.

To change the current units press SETUP-RNGE-UNIT from the SAMPLE mode and select the desired units.

CAUTION

If the current units are in PPM and the span value is 400 PPM, and the units are change to mg/m3 the span value is NOT re-calculated to the equivalent value in mg/m3. Therefore the span value now becomes 400 mg/m3 instead of 400 PPM. Use the following equation to convert the unit with proper temperature and pressure adjustments. Then recalibrate the analyzer.

SO in ppm ⋅ 2.86	⋅	T	⋅	760 mmHg	= SO in mg	m	3
2		273o K		P	2

NOTE

You should now re-enter the expected span concentration value in different units which should be adjusted for proper pressure and temperature (25°C for U.S. EPA) in the new units and re-calibrate the instrument using one of the methods in Section 8.

Changing units affects all of the RS-232 values, all of the display values, and all of the calibration values and therefore you must re-calibrate the Analyzer.

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