1. Overview:

Thank you for purchasing and using the MP521 laboratory pH/conductivity meter (hereinafter referred to as the instrument).

Before using this instrument, please carefully read the user manual to help you use and maintain it correctly. Based on the principle of continuously improving instrument performance, our factory reserves the right to make changes to the content and accessories of this manual without prior notice.

This instrument is a combination of advanced electronic technology, sensor technology, and software design. It is a cost-effective pH, mV, and conductivity multi parameter measuring instrument, suitable for measuring the pH and conductivity values of conventional aqueous solutions in the laboratory, and can also be used to measure the potential of various ion selective electrodes.

This instrument is equipped with a built-in microprocessor chip, has a beautiful appearance, and is easy to use. It has the following significant features:

1.1.Compliant with GLP requirements, it has intelligent functions such as automatic calibration, automatic temperature compensation, data storage, timed measurement, RS232 output, clock display, function settings, and self diagnostic information.

1.2.By using digital filtering and slip technology, the response speed of the instrument and the accuracy of measurement data are intelligently improved, and the "" icon is displayed when the measurement value is stable.

1.3.Automatically identify pH standard buffer solutions, with three series of standard buffer solutions to choose from: European and American series, NIST series, and Chinese series.

1.4.By adopting advanced automatic frequency conversion and automatic voltage regulation technology, the measurement range of the constant K=1 conductivity electrode is expanded by 10 times. With just one point calibration, it can meet the measurement accuracy requirements within the range of 100 mS/cm, which is a point calibration function of this instrument.

1.5.The instrument circuit board adopts SMT surface mount technology, which improves the reliability of product processing.

1.6.The instrument has a product serial number with an asterisk (*).

1.7.The instrument meets the IP54 dustproof and splash proof rating, and all sockets are sealed with silicone caps for protection.

2. Technical parameters:

2.1. pH：

2.2. mV:

2.3. Conductivity:

2.4. temperature

2.5. Other technical parameters:

2.6. Working conditions: