Digital Microcomputer desktop PH meter MSLZJ021
The instrument is controlled by a microprocessor the intelligent pH meter,
a rigorous screening and selection of the a highly reliable imports integration
components refined, stable performance, reliable, and easy to operate. Suitable for the laboratory
precision measuring solution acidity (pH) and electrode potential (mV), widely used in light industry,
chemical, pharmaceutical, food, epidemic prevention, environmental protection, and education and
scientific research departments electrochemical analysis.
This user manual complete guide you to install and use. At the same time, made a presentation
of instrument maintenance, maintenance, and related considerations. Please read the user manual,
so that you can better use our products to improve the efficiency of your work.
Before using this instrument, please be sure to take a few minutes to fill in the user manual
accompanying the user registration card and mail or email me company. So that the company's
sales engineers to provide technical support for more effective after-sales service.
The instrument during the warranty period, the case of quality problems, please contact the dealer
or my company's sales department. We will carefully and quickly for you to solve.
If you use this instrument problems, view the user manual "If we can not resolve, please feel free to
consult to our service department, we will warmly and in a timely manner to serve you.
out of the box and acceptance
After unpacking the instrument, please check the following devices:
● MSLZJ021 pH meter(1)
● Molded PH composite electrode(1)
● short circuit plug (plug electrode jack on the rear of the instrument)(1)
● electrode holder(1)
● Power adapter (9V DC output)(1)
● standard buffer reagents: pH4, pH 6.86, pH 9.18(1)
● User Guide(1)
Microcomputer desktop PH meter MSLZJ021 Working conditions
● Ambient temperature：0 ~ 40 ℃； Relative Humidity： <85%
● Electricity Supply source：9V DC power supply
● no significant vibration
● In addition to the Earth's magnetic field external magnetic field interference
● Input impedance：≥ 1 × 1012Ω
● zero drift： ≤ 0.01pH ± 1 word / 2 hours
● solution temperature compensation range：0~ 100 ℃
Dimensions and weight：230 × 200 × 60mm (length × width × height) 1.2Kg
3、 the instrument works
pH Measurement Fundamentals
The measurement of pH of aqueous solutions are generally using a glass electrode as the
indicator electrode, calomel electrode as the reference electrode, when the hydrogen ion
concentration in the solution (strictly speaking, activity) that the pH value of the solution is changed,
a glass electrode and a calomel electrode generated between the electric potential also changes with
the potential change relationship meets the following formula:
△ E = -58.16 × △ pH × (273 t ℃) / 293 (mV)
△ E: represents the electric potential changes in millivolts. (MV)
△ pH: the changes of the pH of the solution.
t: indicates the measured solution temperature (° C).