Leici PHS-3C precision pH meter is a desktop digital display pH meter. The measurement resolution of both models is 0.01pH and the mV value resolution is 1mV. Among them, the PHS-3CPH meter is manually temperature compensated and equipped with E-201F composite electrode . PHS-3C cannot measure temperature values. This precision pH meter is a pH meter used in laboratories and is widely used in chemical industry, food, scientific research institutions, universities and other fields.
ãmain featureã
â High-definition LCD display, button operation
âSupport functions such as automatic shutdown, power-off protection and factory reset
âSupport IP54 protection level
â Comes standard with composite pH electrode, electrode holder, dust cover and calibration buffer powder
Intelligent detection and automatic identification
â Intelligent end point determination, supporting balance measurement mode and continuous measurement mode
âSupport manual temperature compensation
â Supports 1-3 points pH electrode calibration
â Automatically identify three pH standard buffer solutions: GB 4.00pH, 6.86pH, and 9.18pH, and support custom pH buffer solutions
Data management
â Support data storage (50 sets), review, and deletion
1. Pull out the electrode base bracket, loosen the nut at the lower end of the electrode bracket, install the PHS-3C precision pH meter electrode bracket to the bottom, and tighten the nut.
2. Install the power supply and plug in the socket.
3. After the PHS-3C precision pH meter is connected to the power supply, you can see that it displays 0mV. Generally, the value does not exceed 0+0.2mV.
4. Install the electrode on the electrode holder, unplug the short-circuit plug, and connect the PH electrode.
Faults and solutions
1. When measuring or calibrating, if the data is inaccurate, you can unplug the electrode and plug in the short-circuit plug. If the number is 0±0.2mV, it means the PHS-3C precision pH meter is normal.
2. If the calibration data is inaccurate, you can press and hold the "Confirm" button for more than 3 seconds in the measurement state. The PHS-3C/3E precision pH meter displays "SYS rSt". After releasing the "Confirm" button, the pH meter flashes. Press the "Confirm" button again, and the PHS-3C precision pH meter will reset the electrode calibration slope.
1. The PHS-3C precision pH meter is a precision instrument with high input impedance. When in use, keep the input terminal dry and clean. When the pH meter is not in use, insert the Q9 short-circuit plug into the socket to prevent moisture and dust.
2. The PHS-3C precision pH meter and its power supply must be well grounded.
3. During measurement, the electrode lead-in wire should remain stationary.
4. When calibrating, do not mix the wrong solution, otherwise it will cause measurement errors of the PHS-3C precision pH meter.
田继远 - 《PH计原理及有效操作》
赵翔;赵兵;王桂燕;刘晶莹;王绍宁;王国清 - 《实验室科学》
程立英 - 《中国化工贸易》
修宏宇; 贺新洋 - 《不同级别pH计在测量时所引入的不确定度分量》