Main features:
1. Complies with the DL/T677-2009 standard for the power industry of the People's Republic of China.
2. It has two functions: pH electrode slope temperature compensation and measured solution temperature compensation, and the solution temperature compensation coefficient can be set.
3. Automatic calibration of one point and two points, with user-defined standard samples to meet different range requirements.

Working conditions:
1. Environmental temperature: 5-50 ℃
2. Relative humidity: ≤ 85%
3. Water sample temperature: 5-45 ℃
4. Allowable pressure: ＜ 0.2MPa
5. There are no corrosive gases in the surrounding air, no influential vibrations, and no strong electromagnetic field interference.
6. Working power supply: Ac220V ± 10%, 50H2, 30W
If the user has other requirements, they can be explained when placing an order.

Technical guidance:
1. Measurement range: 0~14pH
2. Basic error: ± 0.5pH (2-12pH)
3. Reproducibility: ± 0.3pH (2-12pH)
4. Stability: 24 hours, ± 0.3H (2-12pH)
5. Response time: ≤ 60 seconds (stable value 90%)
6. Input impedance: ≥ 1012 Ω
7. Temperature compensation range: 5-45 ℃
8. Temperature measurement range: 5-50 ℃ Resolution: 0.01 ℃ Accuracy: ± 0.3 ℃
9. Output signal: Current: Two 4-20mA channels (RL=500 Ω)
Communication: RS485
Alarm: normally open relay contact 1A/24VDc or 1A/120VAC
10. External dimensions:
Dimensions of secondary instrument: 144 × 144 × 178mm
11. Electrode installation methods: submerged, reaction tank, flow channel, liquid discharge, vegetable pipe, etc.
12. Weight: 2Kg