PH meter with history curve

I. product overview

Zw-ph series PH meter with history curve is an online intelligent dissolved oxygen testing instrument introduced from foreign technology. Imported components and dissolved oxygen film head are combined with advanced production technology and surface sticking technology to ensure the long-term stability and reliability of the instrument. Automatic determination of electrode zero and slope overrun; The optocoupler isolates and protects the output of 4 ~ 20mA signal, and there is no interference between the input signal and the output signal.

Ii. Application:

Zw-ph series PH meter with history curve can be widely used for continuous monitoring of dissolved oxygen value in chemical fertilizer, metallurgy, environmental protection water treatment engineering, pharmacy, biochemistry, food, aquaculture and tap water.

Iii. Technical parameters

1. Measuring range: 0.00 ~ 14.00pH;

2. Resolution: 0.01pH;

3. Accuracy: level 0.05;

4. Stability: 0.03pH/24h;

5. PH standard solution: 4.00/7.00/10.01; 9.18/4.01/6.86.

6, temperature compensation: 0 ~ 99.9 ℃ (pH);

7. PH correction range: 0 1.45 pH; Slope + / - 30%;

8. Action control: two sets of ON/OFF relays;

9. Relay hysteresis: set at will;

10. Signal isolation output: 4 ~ 20mA isolation protection output;

11, working conditions: temperature: 5 ~ 45 ℃;

12. Signal input impedance: 1 1013W;

13. Current output load: large zui load of 500W is allowed;

14. Ground voltage insulation: zui small load is 500VDC;

15. Working voltage: 230VAC 10%, 50/60hz;

16. Protection level: IP65;

17, can be adapted to domestic and foreign manufacturers of composite industrial pH/ORP electrode;

18. Size: 96 96 120mm;

19. Mounting hole size of the instrument panel is 92 92mm;

10. Weight: 0.9kg.

Iv. Main features:

1. All imported chips and components are adopted, and zui new surface sticker production process is adopted to ensure stable and reliable operation of the instrument;

2. Multi-parameter display: PH value, temperature value, high alarm setting value, low alarm setting value, whether the meter is in high or low alarm state, and the current time can be displayed at the same time. Each parameter is clear at a glance;

3. The unique PH value corresponding to 4 ~ 20 mA current output is reversible and can be set at any value, which can bring special convenience to users;

4. Adopt waterproof and gas-proof fully sealed flame-retardant shell, protection grade IP65, which can be used in very bad environmental conditions;

5. RS485 communication (optional);

6, unique history curve function, can record the current 30 days of historical data and query function;

7. The unique design of the operation menu brings great convenience to users, who can also use it freely without reading the manual.

After-sales service commitment:

1. If the quality problem of zhongwei measurement and control products sold by our company occurs within 12 months, we will be responsible for free maintenance.

2. During the warranty period, if there are any quality problems with our products, we will repair or replace them for free.

3. During the warranty period, if the product is damaged due to improper use by the user, our company will be responsible for maintenance and charge the cost of damaged parts.

4. If quality problems occur after the warranty period, our company will be responsible for maintenance and charge the cost of damaged parts.

5. If users need our on-site service, our service staff will arrive at the site within 12 hours for users in the province and within 48 hours for users outside the province.