Milwaukee MW600 user manual Altitude Compensation, Altitude, Meters above Sea Level

ALTITUDE COMPENSATION:

The displayed measurements are referenced to sea level pressures. At higher elevations, oxygen solubility decreases (thus at higher elevations actual oxygen concentrations are really lower than the displayed value).

The table below illustrates the changes in the solubility of oxygen in air saturated fresh water as a result of changes in elevation. The table can also be used to correct the displayed measurement. If the meter was calibrated at an elevation above sea level, you multiply your reading by the ratio of:

(ppm at the elevation) / (the ppm at sea level)

For example: You are at 600 m above sea level and the meter displays 3.2 ppm. The temperature is 14 °C.

To correct your measurement multiply the displayed measurement by the ratio of (ppm reading at 600 m) / (ppm reading at 0 m) =

3.2ppm X (9.6 ppm/10.3 ppm) = 2.98 ppm (or 3.0 ppm altitude corrected).

°C		Altitude, Meters above Sea Level						°F
	0 m	300 m	600 m	900 m	1200 m	1500 m	1800 m
0	14.6	14.1	13.6	13.2	12.7	12.3	11.8	32.0
2	13.8	13.3	12.9	12.4	12.0	11.6	11.2	35.6
4	13.1	12.7	12.2	11.9	11.4	11.0	10.6	39.2
6	12.4	12.0	11.6	11.2	10.8	10.4	10.1	42.8
8	11.8	11.4	11.0	10.6	10.3	9.9	9.6	46.4
10	11.3	10.9	10.5	10.2	9.8	9.5	9.2	50.0
12	10.8	10.4	10.1	9.7	9.4	9.1	8.8	53.6
14	10.3	9.9	9.6	9.3	9.0	8.7	8.3	57.2
16	9.9	9.7	9.2	8.9	8.6	8.3	8.0	60.8
18	9.5	9.2	8.7	8.6	8.3	8.0	7.7	64.4
20	9.1	8.8	8.5	8.2	7.9	7.7	7.4	68.0
22	8.7	8.4	8.1	7.8	7.7	7.3	7.1	71.6
24	8.4	8.1	7.8	7.5	7.3	7.1	6.8	75.2
26	8.1	7.8	7.5	7.3	7.0	6.8	6.6	78.8
28	7.8	7.5	7.3	7.0	6.8	6.6	6.3	82.4
30	7.5	7.2	7.0	6.8	6.5	6.3	6.1	86.0
32	7.3	7.1	6.8	6.6	6.4	6.1	5.9	89.6
34	7.1	6.9	6.6	6.4	6.2	6.0	5.8	93.2
36	6.8	6.6	6.3	6.1	5.9	5.7	5.5	96.8
38	6.6	6.4	6.2	5.9	5.7	5.6	5.4	100.4
40	6.4	6.2	6.0	5.8	5.6	5.4	5.2	104.0
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