Overview
PINGXUAN PXWS-3 Karl Fischer Moisture Analyzer is a micro moisture analyzer using the Titrimetric method of Karl electricity. The instrument has a large-screen LCD display and a user-friendly menu design, and the operation is simple. The program has included the operation flow of relevant national standards (such as GB7600-87), which can realize one-click automatic completion of test analysis.
Features
1. Simple operation: large-screen LCD display, user-friendly menu settings, built-in standard operating procedures, and one-click automatic test completion.
2. Humanized Appearance Design: The height and width of the instrument conform to the operating habits. Electrochemical cells are located on the upper right side and buttons are located on the left side, which is convenient for right-hand injection and left-hand operation.
3. High current background compensation function: Significantly shorten standby time to less than 30 minutes.
4. Excellent technology: powerful microprocessor and dual CPU design; dual power channel separates electrolysis Electrode from measurement Electrode, automatically suppressing interference; direct A/D sampling conversion of measurement Electrode data, reducing errors; optional micro thermal printer; with measurement Electrode fault diagnosis program.
5. Instrument Self-check function: Automatically detect and prompt Electrode short circuit, open circuit and other faults.
6. Test endpoint display: buzzer prompt, Chinese characters display, and the results are intuitive.
7. Built-in perpetual calendar: with year, month, day, week, hour, minute, second display, data is automatically stored after power failure without loss.
Principle
The instrument works based on the principle of the Titrimetric method (Coulometry). Iodine is produced by electrolysis, and the iodine reacts with the moisture in the sample in a Basis Weight chemical reaction. The instrument accurately calculates the Moisture content in the sample according to Faraday's law by measuring the electricity consumed during the electrolysis process.
Applications
Moisture content determination of transformer oil in operation, trace moisture analysis of Petrochemicals, pharmaceuticals, food, electric power, scientific research and other fields
Standards
GB7600-87 "Determination of Moisture content of transformer oil in operation" (Coulometry)
Steps
1. Boot: Install the Electrochemical cell, insert the measurement Electrode and electrolysis Electrode into the corresponding socket, turn on the power switch, and the instrument automatically enters the main menu.
2. Set parameters: Press the "Settings" key to enter the settings menu, use the arrow keys to move the cursor to select items, and press the "Confirm" key to enter the submenu for parameter setting (Note: "electrolysis settings" are important parameters, please do not change them at will). After the setting is completed, press the "Confirm" key to save and return, and press the "Return" key to exit step by step without saving the data.
3. Sample measurement: Press the "Stir" button to start stirring. If the stirrer does not turn, the speed control knob of the panel can be adjusted. Then open the "electrolysis" button. If the measurement voltage value is > 100, the instrument shows "The electrolysis liquid is initially equilibrating, please wait...". After equilibrating, the alarm prompts "The electrolysis liquid has been equilibrated, please press the start button to inject the sample". Press the "Start" button to inject the sample, and the instrument will automatically test. After the end, the buzzer will sound, showing "The test has ended".
Notice
* When setting parameters, pressing the "Confirm" key to confirm the return will save the data, and pressing the "Return" key directly will not save the data.
* "Electrolysis setting" is an important parameter of the system, do not change it at will.
* In the sample measurement procedure, if the measurement voltage < 20, the instrument will prompt "measurement Electrode short circuit!".
* If the measurement voltage is between 20 and 80, the instrument will prompt "excessive iodine in electrolysis solution!", at this time, an appropriate amount of pure water can be injected to neutralize the excess iodine, and the error message will be automatically eliminated.
* If the measurement voltage is > 6000, the instrument will prompt "measurement Electrode open circuit!".
