SDF-Ⅲ Portable pH Meter/Conductivity Meter/Spectrophotometer Verification Device

1 Technical Description
The SDF-III Portable pH Meter/Conductivity Meter/Spectrophotometer Verification Device consists of a pH meter verifier, conductivity meter metrology standard, and spectrophotometer metrology standard. It is primarily used for the verification and calibration of pH meters, conductivity meters, and spectrophotometers.
2 Main Technical Specifications
1. pH Meter Verifier:
pH output range: 0–14.0000;
pH indication error: 0.0005 pH (0–14.0000);
mV output range: -2000.00 mV to +2000.00 mV;
mV resolution: 0.02 mV;
Temperature compensation range: 0°C–99.9°C.
2. Conductivity Meter Metrology Standard
Measurement range: 0.05 μS–2×10⁴ μS;
Accuracy: 0.05% (1 μS–2×10⁴ μS);
0.1% (0.05 μS–1 μS).
3. Spectrophotometer Metrology Standard
Calibration range: 200 nm–900 nm;
Wavelength uncertainty: 0.01 nm–1.0 nm;
Transmittance uncertainty: 0.5%
This standard consists of the following components:
1 Wavelength standards: Low-pressure mercury lamp wavelength standard, interference filter reference material, praseodymium-neodymium filter reference material, holmium oxide filter reference material
2 Transmittance standards: Visible light transmittance standard filter reference material, ultraviolet light transmittance filter
3 Stray radiation rate filter reference material