Hanna Instruments ec 214 用户手册
13
12
• Select the appropriate range:
"199.9 µS"
for HI7033/HI8033,
"1999µS"
for HI7031/HI8031,
"19.99 mS"
for HI7030/HI8030,
"199.9 mS"
for HI7034/HI8034.
Note: If the display shows "1", there is an over-range condition.
Select the next higher range.
• Allow a few minutes for the reading to stabilize and adjust the
“CALIBRATION” knob to read (on the LCD) the value of the buffer
solution at 25 C (77 F),e.g. 12.88 mS/cm.
solution at 25 C (77 F),e.g. 12.88 mS/cm.
• All subsequent measurements will be referenced to 25 C (77 F).
• To reference the measurements to 20 C (68 F), adjust the “CALI-
• To reference the measurements to 20 C (68 F), adjust the “CALI-
BRATION” knob to read (on the LCD) the value of the buffer
solution at 20 C (68 F), e.g. 11.67 mS/cm. See conductivity vs.
temperature chart.
solution at 20 C (68 F), e.g. 11.67 mS/cm. See conductivity vs.
temperature chart.
• Calibration is now complete and the instrument is ready for use.
CONDUCTIVITY VERSUS
CONDUCTIVITY VERSUS
CONDUCTIVITY VERSUS
CONDUCTIVITY VERSUS
CONDUCTIVITY VERSUS
TEMPERATURE CHART
TEMPERATURE CHART
TEMPERATURE CHART
TEMPERATURE CHART
TEMPERATURE CHART
The conductivity of an aqueous solution is the measure of its ability to
carry an electrical current by means of ionic motion.
The conductivity invariably increases with increasing temperature.
It is affected by the type and number of ions in the solution and by
the viscosity of the solution itself. Both parameters are temperature
dependent. The dependency of conductivity on temperature is ex-
pressed as a relative change per degree Celsius at a particular
temperature, commonly as percent per C.
Since a small difference in temperature causes a large change in
conductivity, the readings are usually normalized at 25 C.
carry an electrical current by means of ionic motion.
The conductivity invariably increases with increasing temperature.
It is affected by the type and number of ions in the solution and by
the viscosity of the solution itself. Both parameters are temperature
dependent. The dependency of conductivity on temperature is ex-
pressed as a relative change per degree Celsius at a particular
temperature, commonly as percent per C.
Since a small difference in temperature causes a large change in
conductivity, the readings are usually normalized at 25 C.
C
F
HI 7030
HI 7031
HI 7033
HI 7034
HI 7035
HI 7039
HI 8030
HI 8031
HI 8033
HI 8034
HI 8035
HI 8039
(µS/cm)
(µS/cm)
(µS/cm)
(µS/cm)
(µS/cm)
(µS/cm)
0
32
7150
776
64
48300
65400
2760
5
41
8220
896
65
53500
74100
3180
10
50
9330
1020
67
59600
83200
3615
15
59
10480
1147
68
65400
92500
4063
16 60.8
10720
1173
70
67200
94400
4155
17 62.6
10950
1199
71
68500
96300
4245
18 64.4
11190
1225
73
69800
98200
4337
19 66.2
11430
1251
74
71300
100200
4429
20
68
11670
1278
76
72400
102100
4523
21 69.8
11910
1305
78
74000
104000
4617
22 71.6
12150
1332
79
75200
105900
4711
23 73.4
12390
1359
81
76500
107900
4805
24 75.2
12640
1386
82
78300
109800
4902
25
77
12880
1413
84
80000
111800
5000
26 78.8
13130
1440
86
81300
113800
5096
27 80.6
13370
1467
87
83000
115700
5190
28 82.4
13620
1494
89
84900
117700
5286
29 84.2
13870
1521
90
86300
119700
5383
30
86
14120
1548
92
88200
121800
5479
31 87.8
14370
1575
94
90000
123900
5575
EC 214 manually compensates for temperature differences with a
fixed ß at 2%.
EC 215 automatically compensates for temperature differences with a
built-in circuitry. A knob is provided to adjust the temperature coeffi-
cient manually from 0% (without compensation) to 2.5% per degree
Celsius.
fixed ß at 2%.
EC 215 automatically compensates for temperature differences with a
built-in circuitry. A knob is provided to adjust the temperature coeffi-
cient manually from 0% (without compensation) to 2.5% per degree
Celsius.