14
The TDS value in aqueous solutions is directly proportional to conduc‑
tivity. The ratio between the two parameters depends on the solution
and usually it is set to a factor of 0.5 (corresponding to a solution of
CaCO
3
). This means that 1
µ
S/cm is equal to 0.5 mg/L (ppm) of TDS.
For manual temperature compensation, refer to the following chart:
For instance, the TDS values of the calibration solutions at 25 °C are
1382 mg/L or 12.41 g/L when using
HI7032
or
HI7036
, respectively.
At 20 °C, the values are 1251 mg/L or 11.24 g/L, respectively.
With the solutions at 30 °C, the values are 1515 mg/L or 13.61 g/L,
respectively.
ºC
ºF
HI7032
mg/L (ppm)
HI7036
g/L (ppt)
0
32
758
6.82
5
41
876
7.88
10
50
999
8.99
15
59
1122
10.10
16 60.8
1148
10.33
17 62.6
1173
10.56
18 64.4
1200
10.78
19 66.2
1224
11.01
20
68
1251
11.24
21 69.8
1277
11.47
22 71.6
1303
11.71
23 73.4
1329
11.94
24 75.2
1358
12.18
25
77
1382
12.41
26 78.8
1408
12.65
27 80.6
1438
12.89
28 82.4
1461
13.13
29 84.2
1476
13.37
30
86
1515
13.61
31 87.8
1541
13.85
TDS VERSUS
TEMPERATURE CHART