LaMotte Dissolved Oxygen Water Quality Test Kit - Manual (Page 15)

15
a
Atmospheric Pressure (mmHg) Equivalent Altitude (ft) Correction Factor
775 540 1.02
760 0 1.00
745 542 0.98
730 1094 0.96
714 1688 0.94
699 2274 0.92
684 2864 0.90
669 3466 0.88
654 4082 0.86
638 4756 0.84
623 5403 0.82
608 6065 0.80
593 6744 0.78
578 7440 0.76
562 8204 0.74
547 8939 0.72
532 9694 0.70
517 10,472 0.68
PERCENT SATURATION
Use the atmospheric pressure reading from a barometer or the local altitude to determine
the correction factor from the chart below. Multiply the dissolved oxygen test result (ppm)
by the correction factor to obtain the corrected dissolved oxygen value.
To determine the percent saturation, locate the temperature (°C) of the water sample on
the top scale. Locate the corrected dissolved oxygen concentration (ppm) on the bottom
scale. Draw a straight line between the two points. Read the % saturation where the line
crosses the % saturation scale.