PASCO CI-6729 (1X) CONDUCTIVITY SENSOR - Manual (Page 30)

26
Conductivity Sensor 012–06485B
Reference
Solution
Approximation
Normality of
Solution
A
B
C
D
1
0.1
0.01
0.001
74.2480 g of KCI weighed in air per 1 L
of solution at 20 °C
7.4365 g of KCI weighed in air per 1 L
of solution at 20 °C
0.7440 g of KCI weighed in air per 1 L
of solution at 20 °C
Dilute 100 mL of solution C to 1 L at 20 °C
Method of Preparation Temp., °C
0
18
25
0
18
25
0
18
25
0
18
25
Electrical
Conductivity,
µS/cm
65,176
97,838
111,342
7,138
11,167
12,856
773.6
1,220.5
1,408.6
77.69
127.54
148.93
Table 5—Table of High Accuracy Reference Solution for Calibration*
* Excluding the conductivity of the water used to prepare the solutions. These tabulated conductivity values are in international
units. When using measuring instruments calibrated in absolute units, multiply the tabular values by 0.999505
**At 25 °C, given specific conductance values included in this table.
Parts Per Million
Specific
conductance
micromhos/cm*
.055
.056
.063
.071
.083
.100
.125
.167
.250
.500
1.000
1.250
1.667
2.500
5.000
10.000
20.000
40.000
80.000
158.730
312.500
625.000
1,250.000
2,500.000
5,000.000
10,000.000
Specific
resistance
megohmos-cm*
18.240
18.000
16.000
14.000
12.000
10.000
8.000
6.000
4.000
2.000
1.000
.800
.600
.400
.200
.100
.050
.025
.0125
.0063
.0032
.0016
.0008
.0004
.0002
.0001
As Ion
none
.036
.041
.046
.054
.065
.081
.108
.163
.325
.650
.813
1.083
1.625
3.250
6.500
13.000
26.000
52.000
103.175
203.125
406.250
812.500
1,625.000
3,250.000
6,500.000
As CaCO
3
As NaCl**
none
.028
.031
.036
.042
.050
.063
.083
.125
.250
.500
.625
.833
1.250
2.500
5.000
10.000
20.000
40.000
79.635
156.250
312.500
625.000
1,250.000
2,500.000
5,000.000
none
.022
.025
.029
.033
.040
.050
.067
.100
.200
.400
.500
.667
1.000
2.000
4.000
8.000
16.000
32.000
63.492
125.000
250.000
500.000
1,000.000
2,000.000
4,000.000
Gr./Gal.
as
CaCO
3
none
.002
.002
.002
.002
.003
.004
.005
.007
.015
.029
.037
.049
.073
.146
.292
.585
1.170
2.340
4.641
9.137
18.273
36.550
73.099
146.199
292.398
Table 4—Conversion Chart to Estimate TDS of Aqueous Solutions
*At 25 °C