Combine the measurement standards for acidity meter, conductivity meter, and spectrophotometer calibration into one, which can be connected to a laptop to achieve computer control.
Used for on-site verification/calibration of technical indicators such as indication error and repeatability of pH meters, conductivity meters, and spectrophotometers.
It has the advantages of high accuracy, stability and reliability, small size, easy portability, and convenient use.
Main technical indicators:

PHCalculation standard

Range:0～14pH

Uncertainty:0.0005pH(k=2)

Conductivity meter standard

Range:0.05 ～2.5×104uS

Uncertainty:≤0.1%

Spectrophotometer standard

Wavelength uncertainty:0.01nm～1.0nm

Transmittance uncertainty:0.3%