Summary

The water soluble acid value automatic tester is designed and manufactured according to the national standard of the people's Republic of China GB / T 7598-2008 determination method of oil-water-soluble acid of transformer in operation and relevant standards. It adopts large screen liquid crystal display and is controlled by microprocessor. It can automatically complete heating, constant temperature, oscillation, sampling, testing and other functions according to the user's setting conditions. It can measure three samples at a time, greatly shorten the user's test time, and the instrument has RS232C interface, which can communicate with the computer.

Main technical parameter

1. Measurement range: pH = 3.6～7.0

2. Minimum display: 0.1

3. Constant temperature accuracy: ± 5 ℃

4. Normal use conditions

- Ambient temperature: 5 ℃～40 ℃

- Relative humidity: ≤ 75% RH

5. Power supply: AC220 V ± 22 V, 50 Hz ± 1 Hz

6. Overall dimension: 650 * 440 * 420mm

7. Weight: 45kg

Advantage

1. Micro processing, automatic heating, constant temperature, oscillation, cup changing position, washing solution, testing, cleaning, calculation, displaying test results and printing;

2. LCD 320x240 display, menu prompt, simple operation;

3. Measure 3 samples at a time to save operation time;

4. RS232 interface;

5. Water quality correction;

6. Comply with the national standard GB / T7698-2008

Instrument structure

1 --Cover of instrument

2 -- Discharge needle

3 -- Test cup

4 -- Liquid crystal display

5 -- Keyboard

6 -- Printer

Preparation method of pH indicator

1. Bromocresol green: grind 0.1g bromocresol green with 7.5ml 0.02mol/l sodium hydroxide and dilute to 250ml with desalted water. Then adjust the pH value from 4.5 to 5.4 with 0.1 mol / L sodium hydroxide or hydrochloric acid.

2. Bromocresol violet: dissolve 0.1g bromocresol violet in 9.25ml 0.02mol/l sodium hydroxide and dilute to 250ml with desalted water. Then adjust the pH value to 6.0 with 0.1 mol / L sodium hydroxide or hydrochloric acid.

Accessories