Overview
QIWEI PHS-25 is a Benchtop precision pH meter. Measurement accuracy is +/- 0.05pH. It can measure ph value and mV value at the same time. It is displayed with white backlight. This model supports rechargeable battery, which can be powered by Power Supply cable or can be directly used by unplugging the power cord. The battery can be used for 10 to 15 hours on a single charge.
Features
1. Measurement accuracy up to +/- 0.05pH
2. Simultaneous measurement of ph value and mV value
3. Adopt white backlight display
4. Built-in rechargeable battery, supports off-power use
5. Battery life of 10 to 15 hours
6. Easy to operate and flexible to use
Principle
PHS-25 pH meter converts the activity of hydrogen ions in aqueous solution into an electrical energy signal through Sensor (pH Compound Electrode). After the signal is input into the pH meter, it is operationally amplified and current checked, and then converted into a digital signal through an A/D converter and displays the measurement results.
Applications
Water quality testing, laboratory analysis, industrial process control, environment monitoring, education and research
Standards
pH4.00, pH6.86, pH9.18 standard buffer solution
Steps
1. Connect pH Compound Electrode to Electrode Socket (Q9 interface)
2. Turn on the power switch to start the instrument
3. Use pH/mV switch to select Measurement mode
N4. Adjust the temperature knob according to the temperature of the solution to be tested
5. Use the positioning knob to adjust the pH6.86 standard buffer value when calibrating
6. Use the slope knob to adjust the pH4.00 or pH9.18 standard buffer value when calibrating
7. Start measurement and read display results
Notice
• Adjust the standard buffer value according to the corresponding temperature when calibrating
• Electrode socket is Q9 interface, need to match the corresponding Electrode
• Optional measurement ph value or mV value, pay attention to mode switching
• Power Adapter requires a regulated model
• The battery can be used for 10 to 15 hours after being fully charged
