Feature #1285
Updated by tin about 6 years ago
**Computation of the drift rate of calibration constant 72 (will take 1 week to complete): C = [(A – B) * 1000000] / [A * D] ppm per day A = the value of the calibration constant 72 (following an ACAL on day 1 of the test) B = the value of calibration constant 72 (following an ACAL on the last day of the test) C = the drift rate of calibration constant 72 in ppm per day D = the number of test days where the instrument was powered on during the test interval (See Note # 1) If the absolute value of C is > 0.43 ppm per day, then the A3 assembly in your instrument needs to be replaced. *Complete an ACAL just prior to obtaining the present value of Calibration Constant 72* |Date |CAL 72 after ACAL|ppm Deviation|TEMP?| |11/16| 981.648769E-3 |Initial| +41.3°C | |11/16 +3h| 981.652110E-3 |+0.334| +35.5°C | |11/17|981.652541E-3 |+0.043|+37.0°C | |11/17 7PM|981.665868E-3 |+1.333|+40.1°C | |11/18| | | |Date |CAL 72 after ACAL|ppm Deviation|TEMP?| Deviation from day 0, ppm | |1/18|997.711415e-03 | 0 | 32.5 | 0 | |1/19|997.711486E-03 | +0.0712 | 31.9 | +0.0712 | |1/20|997.711441E-03 | -0.0451 | 33.8 | +0.0261 | |1/21|997.711391E-03 | -0.0501 | 31.5 | -0.0241 | |1/24|997.711709E-03 | +0.3187 | 30.6 | +0.2947 | |1/25|997.711798E-03 | +0.0892 | 31.9 | +0.3839 | |1/26|997.712097E-03 | +0.2997 | 29.9 | +0.6836 | |1/28|997.711577E-03 | -0.5212 | 32.3 | +0.1624 | |1/29|997.711566E-03 | -0.0110 | 33.0 | +0.1513 | |2/02|997.711546E-03 | -0.0200 | 32.7 | +0.1313 | |2/03|997.711203E-03 | -0.3438 | 34.6 | -0.2125 | |2/04|997.711465E-03 | +0.2626 | 33.4 | +0.0501 | |2/07|997.712158E-03 | +0.6946 | 35.2 | +0.7447 | |2/08|997.712250E-03 | +0.0922 | 34.8 | +0.8369 | |2/09|997.712179E-03 | -0.0712 | 36.4 | +0.7658 | |2/10|997.711496E-03 | -0.6846 | 37.6 | +0.0812 | |2/12|997.711259E-03 | -0.2375 | 40.7 | -0.1564 | |2/13|997.711034E-03 | -0.2255 | 42.2 | -0.3819 | |2/14|997.711229E-03 | +0.1954 | 41.1 | -0.1864 | |2/16|997.711666E-03 | +0.4380 | 36.9 | +0.2516 | |2/17|997.711682E-03 | | 35.0 | | |2/24|997.711203E-03 | | 35.7 | | |2/26|997.710995E-03 | | 35.6 | | |2/28|997.710960E-03 | | 37.9 | | |3/01|997.710894E-03 | | 37.8 | | |3/05|997.710730E-03 | | 40.8 | | |3/06|997.710628E-03 | | 44.7 | | |3/08|997.711302E-03 | | 37.4 | | |3/15|997.711152E-03 | | 31.7 | | h2. Drift rate : *-0.01623 ppm/day* h2. Drift rate 2 : *-0.03329 ppm/day* (D = 23) h2. Drift rate 2 : *-0.00839 ppm/day* (D = 30) h2. Recalibrated DCV to 7V MM *CAL? 2,1 : 7.18067804* *CAL? 1,1 : 39.9996932E+3* |Date |CAL 72 after ACAL|ppm Deviation|TEMP?| Deviation from day 0, ppm | |3/22 |997.700746E-3 | 0 | 36.5 | 0 |