Test procedure.
Test procedure.
(i) Arrange to generate pollutant test atmospheres as follows. Test atmospheres A0, A20, and A80 shall be maintained consistent during the tests and reproducible from test day to test day.
(ii) For steps within paragraphs (e)(9)(xxv) through (e)(9)(xxxi) of this section, a chart speed of at least 10 centimeters per hour (or equivalent resolution for a digital representation) shall be used to clearly show changes in measurement responses. The actual chart speed, chart speed changes, and time checks shall be clearly marked on the chart.
(iii) Test day 0. Allow sufficient time for the test analyzer to warm up and stabilize at a line voltage of 115 volts and a room temperature of 25 °C. Adjust the zero baseline to 5 percent of chart (see § 53.21(b)) and recalibrate, if necessary. No further adjustments shall be made to the analyzer until the end of the tests on the third, sixth, ninth, or twelfth test day.
(iv) Measure test atmosphere A0 until a stable measurement reading is obtained and record this reading (in ppm) as Z'n, where n = 0 (see Figure B-4 in appendix A of this subpart).
(v) [Reserved]
(vi) Measure test atmosphere A80. Allow for a stable measurement reading and record it as S'n, where n = 0.
(vii) The above readings for Z'0 and S'0 should be taken at least four (4) hours prior to the beginning of test day 1.
(viii) At the beginning of each test day, adjust the line voltage and room temperature to the values given in table B-4 to subpart B of part 53 (or to the corresponding alternative temperature if a wider temperature range is being tested).
(ix) Measure test atmosphere A0 continuously for at least twelve (12) continuous hours during each test day.
(x) After the 12-hour zero drift test (step ix) is complete, sample test atmosphere A0. A stable reading is not required.
(xi) Measure test atmosphere A20 and record the stable reading (in ppm) as P1. (See Figure B-4 in appendix A.)
(xii) Sample test atmosphere A30; a stable reading is not required.
(xiii) Measure test atmosphere A20 and record the stable reading as P2.
(xiv) Sample test atmosphere A0; a stable reading is not required.
(xv) Measure test atmosphere A20 and record the stable reading as P3.
(xvi) Sample test atmosphere A30; a stable reading is not required.
(xvii) Measure test atmosphere A20 and record the stable reading as P4.
(xviii) Sample test atmosphere A0; a stable reading is not required.
(xix) Measure test atmosphere A20 and record the stable reading as P5.
(xx) Sample test atmosphere A30; a stable reading is not required.
(xxi) Measure test atmosphere A20 and record the stable reading as P6.
(xxii) Measure test atmosphere A80 and record the stable reading as P7.
(xxiii) Sample test atmosphere A90; a stable reading is not required.
(xxiv) Measure test atmosphere A80 and record the stable reading as P8. Increase the chart speed to at least 10 centimeters per hour.
(xxv) Measure test atmosphere A0. Record the stable reading as L1.
(xxvi) Quickly switch the test analyzer to measure test atmosphere A80 and mark the recorder chart to show, or otherwise record, the exact time when the switch occurred.
(xxvii) Measure test atmosphere A80 and record the stable reading as P9.
(xxviii) Sample test atmosphere A90; a stable reading is not required.
(xxix) Measure test atmosphere A80 and record the stable reading as P10.
(xxx) Measure test atmosphere A0 and record the stable reading as L2.
(xxxi) Measure test atmosphere A80 and record the stable reading as P11.
(xxxii) Sample test atmosphere A90; a stable reading is not required.
(xxxiii) Measure test atmosphere A80 and record the stable reading as P12.
(xxxiv) Repeat steps within paragraphs (e)(9)(viii) through (e)(9)(xxxiii) of this section, each test day.
(xxxv) If zero and span adjustments are made after the readings are taken on test days 3, 6, 9, or 12, complete all adjustments; then measure test atmospheres A0 and A80. Allow for a stable reading on each, and record the readings as Z'n and S'n, respectively, where n = the test day number (3, 6, 9, or 12). These readings must be made at least 4 hours prior to the start of the next test day.
(10) Determine the results of each day's tests as follows. Mark the recorder chart to show readings and determinations.
(i) Zero drift.
(A) Determine the 12-hour zero drift by examining the strip chart pertaining to the 12-hour continuous zero air test. Determine the minimum (Cmin.) and maximum (Cmax.) measurement readings (in ppm) during this period of 12 consecutive hours, extrapolating the calibration curve to negative concentration units if necessary. Calculate the 12-hour zero drift (12ZD) as 12ZD = Cmax. − Cmin. (See Figure B-5 in appendix A.)
(B) Calculate the 24-hour zero drift (24ZD) for the n-th test day as 24ZDn= Zn− Zn-1, or 24ZDn= Zn− Z'n-1 if zero adjustment was made on the previous test day, where Zn = 1/2(L1 + L2) for L1 and L2 taken on the n-th test day.
(C) Compare 12ZD and 24ZD to the zero drift limit specifications in table B-1 to subpart B of part 53. Both 12ZD and 24ZD must be within the specified limits (inclusive) to pass the test for zero drift.
(ii) Span drift.
(A) Calculate the span drift (SD) as:
(i) Arrange to generate pollutant test atmospheres as follows. Test atmospheres A0, A20, and A80 shall be maintained consistent during the tests and reproducible from test day to test day.
(ii) For steps within paragraphs (e)(9)(xxv) through (e)(9)(xxxi) of this section, a chart speed of at least 10 centimeters per hour (or equivalent resolution for a digital representation) shall be used to clearly show changes in measurement responses. The actual chart speed, chart speed changes, and time checks shall be clearly marked on the chart.
(iii) Test day 0. Allow sufficient time for the test analyzer to warm up and stabilize at a line voltage of 115 volts and a room temperature of 25 °C. Adjust the zero baseline to 5 percent of chart (see § 53.21(b)) and recalibrate, if necessary. No further adjustments shall be made to the analyzer until the end of the tests on the third, sixth, ninth, or twelfth test day.
(iv) Measure test atmosphere A0 until a stable measurement reading is obtained and record this reading (in ppm) as Z'n, where n = 0 (see Figure B-4 in appendix A of this subpart).
(v) [Reserved]
(vi) Measure test atmosphere A80. Allow for a stable measurement reading and record it as S'n, where n = 0.
(vii) The above readings for Z'0 and S'0 should be taken at least four (4) hours prior to the beginning of test day 1.
(viii) At the beginning of each test day, adjust the line voltage and room temperature to the values given in table B-4 to subpart B of part 53 (or to the corresponding alternative temperature if a wider temperature range is being tested).
(ix) Measure test atmosphere A0 continuously for at least twelve (12) continuous hours during each test day.
(x) After the 12-hour zero drift test (step ix) is complete, sample test atmosphere A0. A stable reading is not required.
(xi) Measure test atmosphere A20 and record the stable reading (in ppm) as P1. (See Figure B-4 in appendix A.)
(xii) Sample test atmosphere A30; a stable reading is not required.
(xiii) Measure test atmosphere A20 and record the stable reading as P2.
(xiv) Sample test atmosphere A0; a stable reading is not required.
(xv) Measure test atmosphere A20 and record the stable reading as P3.
(xvi) Sample test atmosphere A30; a stable reading is not required.
(xvii) Measure test atmosphere A20 and record the stable reading as P4.
(xviii) Sample test atmosphere A0; a stable reading is not required.
(xix) Measure test atmosphere A20 and record the stable reading as P5.
(xx) Sample test atmosphere A30; a stable reading is not required.
(xxi) Measure test atmosphere A20 and record the stable reading as P6.
(xxii) Measure test atmosphere A80 and record the stable reading as P7.
(xxiii) Sample test atmosphere A90; a stable reading is not required.
(xxiv) Measure test atmosphere A80 and record the stable reading as P8. Increase the chart speed to at least 10 centimeters per hour.
(xxv) Measure test atmosphere A0. Record the stable reading as L1.
(xxvi) Quickly switch the test analyzer to measure test atmosphere A80 and mark the recorder chart to show, or otherwise record, the exact time when the switch occurred.
(xxvii) Measure test atmosphere A80 and record the stable reading as P9.
(xxviii) Sample test atmosphere A90; a stable reading is not required.
(xxix) Measure test atmosphere A80 and record the stable reading as P10.
(xxx) Measure test atmosphere A0 and record the stable reading as L2.
(xxxi) Measure test atmosphere A80 and record the stable reading as P11.
(xxxii) Sample test atmosphere A90; a stable reading is not required.
(xxxiii) Measure test atmosphere A80 and record the stable reading as P12.
(xxxiv) Repeat steps within paragraphs (e)(9)(viii) through (e)(9)(xxxiii) of this section, each test day.
(xxxv) If zero and span adjustments are made after the readings are taken on test days 3, 6, 9, or 12, complete all adjustments; then measure test atmospheres A0 and A80. Allow for a stable reading on each, and record the readings as Z'n and S'n, respectively, where n = the test day number (3, 6, 9, or 12). These readings must be made at least 4 hours prior to the start of the next test day.
(10) Determine the results of each day's tests as follows. Mark the recorder chart to show readings and determinations.
(i) Zero drift.
(A) Determine the 12-hour zero drift by examining the strip chart pertaining to the 12-hour continuous zero air test. Determine the minimum (Cmin.) and maximum (Cmax.) measurement readings (in ppm) during this period of 12 consecutive hours, extrapolating the calibration curve to negative concentration units if necessary. Calculate the 12-hour zero drift (12ZD) as 12ZD = Cmax. − Cmin. (See Figure B-5 in appendix A.)
(B) Calculate the 24-hour zero drift (24ZD) for the n-th test day as 24ZDn= Zn− Zn-1, or 24ZDn= Zn− Z'n-1 if zero adjustment was made on the previous test day, where Zn =
1/2(L1 + L2) for L1 and L2 taken on the n-th test day.
(C) Compare 12ZD and 24ZD to the zero drift limit specifications in table B-1 to subpart B of part 53. Both 12ZD and 24ZD must be within the specified limits (inclusive) to pass the test for zero drift.
(ii) Span drift.
(A) Calculate the span drift (SD) as: