Products Description
The conductivity meter used for water quality testing is a type of conductivity instrument specifically designed for detecting water quality. It can measure the conductivity value in water and analyze parameters such as ion content and concentration in water quality. The conductivity meter used for water quality detection is suitable for monitoring and controlling water quality in fields such as environmental protection, aquaculture, and hydrology. It can also monitor real-time parameters such as ion content and concentration in water, improving the efficiency and accuracy of water quality monitoring. At the same time, the output current signal or 485 communication can be connected to automatic control equipment such as PLC or computer to achieve automatic control and data transmission.
Users generally do not need to adjust the instrument panel (electronic unit) by themselves. If there is any error or malfunction, please contact our company for repair under the guidance of technical personnel. If the user has any questions about the instrument, they can remove the connection wire between the instrument and the conductive electrode, and connect the resistance box to the corresponding thermistor (Temps) at pins 11 and 12, as well as pins 9 and 10 at both ends of the electrode, for simulation verification and discrimination. First, set the temperature coefficient of the instrument to 0.00% and convert the accurate value of conductivity using the following formula:
S=106×K/R
In the formula, the conductivity value is in units of μ S · cm-1
K__ electrode constant, unit: cm-1
R__ Resistance box value, unit: Ω
For example, if a resistance box is used to input a 10K Ω resistor and the instrument electrode constant is set to 0.1cm-1, the theoretical conductivity value S=106 × 0.1/10000=10 μ S · cm-1, and the difference between the instrument reading and 10 μ S · cm-1 should be less than or equal to the basic error. This instrument uses NTC temperature coefficient thermistors and adopts a two wire system for temperature measurement and compensation.
Technical Parameters
The following table shows the correspondence between resistance and conductivity (set the "parameters" - "temperature coefficient" of the instrument to 0.00%, set the "automatic mode" to "off" state, and the "electrode constant" corresponds to K in the table)
|
K=0.01 |
K=0.1 |
K=1 |
|||
|
Resistance value |
conductivity |
Resistance value |
conductivity |
Resistance value |
conductivity |
|
50K |
0.200 |
50K |
2.000 |
50K |
20.00 |
|
40K |
0.250 |
40K |
2.500 |
40K |
25.00 |
|
30K |
0.333 |
30K |
3.333 |
30K |
33.33 |
|
20K |
0.500 |
20K |
5.000 |
20K |
50.00 |
|
10K |
1.000 |
10K |
10.00 |
10K |
100.0 |
|
5K |
2.000 |
5K |
20.00 |
5K |
200.0 |
|
2K |
5.000 |
2K |
50.00 |
2K |
500.0 |
|
1K |
10.00 |
1K |
100.0 |
1K |
1000 |
|
500 |
20.00 |
500 |
200.0 |
500 |
2000 |
Corresponding table for temperature and resistance:
|
Resistance value of resistance box |
Temperature value (℃) |
Resistance value of resistance box |
Temperature value (℃) |
|
7352.90 |
0.0 |
1814.51 |
30.0 |
|
4481.09 |
10.0 |
1199.72 |
40.0 |
|
2813.11 |
20.0 |
811.42 |
50.0 |
|
2252.00 |
25.0 |
560.34 |
60.0 |
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