Table B-5 to Subpart B of Part 53 - Symbols and Abbreviations

Table B-5 to Subpart B of Part 53 - Symbols and Abbreviations

B_L - Analyzer reading at the specified LDL test concentration for the LDL test.

B_Z - analyzer reading at 0 concentration for the LDL test.

DM - Digital meter.

C_max - Maximum analyzer reading during the 12ZD test period.

C_min - Minimum analyzer reading during the 12ZD test period.

i - Subscript indicating the i-th quantity in a series.

IE - Interference equivalent.

L₁ - First analyzer zero reading for the 24ZD test.

L₂ - Second analyzer zero reading for the 24ZD test.

n - Subscript indicating the test day number.

P - Analyzer reading for the span drift and precision tests.

P_i - The i-th analyzer reading for the span drift and precision tests.

P₂₀ - Precision at 20 percent of URL.

P₈₀ - Precision at 80 percent of URL.

ppb - Parts per billion of pollutant gas (usually in air), by volume.

ppm - Parts per million of pollutant gas (usually in air), by volume.

R - Analyzer reading of pollutant alone for the IE test.

R₁ - Analyzer reading with interferent added for the IE test.

r_i - the i-th analyzer or DM reading for the noise test.

S - Standard deviation of the noise test readings.

S₀ - Noise value (S) measured at 0 concentration.

S₈₀ - Noise value (S) measured at 80 percent of the URL.

S_n - Average of P₇ . . . P₁₂ for the n-th test day of the SD test.

S'_n - Adjusted span reading on the n-th test day.

SD - Span drift

URL - Upper range limit of the analyzer's measurement range.

Z - Average of L₁ and L₂ readings for the 24ZD test.

Z_n - Average of L₁ and L₂ readings on the n-th test day for the 24ZD test.

Z'_n - Adjusted analyzer zero reading on the n-the test day for the 24ZD test.

ZD - Zero drift.

12ZD - 12-hour zero drift.

24ZD - 24-hour zero drift.