The conductivity tester is mainly used to detect the conductivity, resistivity, thermal conduction effect, heat dissipation effect, heat treatment condition, purity, etc., of non-magnetic colored metals such as copper and aluminum… It has an auto-compensation function. The conductivity measurement results are automatically corrected to a value at 20℃. The normal working environment temperature is 0℃ to +50℃, and relative humidity is 0 to 95%.
Conductivity has a great relationship with temperature. The conductivity of metals decreases as the temperature increases. The conductivity of semiconductors increases as the temperature increases, and within a certain temperature range, conductivity can be approximated as being proportional to the temperature.
In order to compare the conductivity of substances under different temperature conditions, a common reference temperature must be set.
The correlation between conductivity and temperature can often be expressed as: the slope of the conductivity versus temperature graph.
Appendix 1: Reference table of conductivity values and temperature coefficients for common materials.
|Metal||Electrical Conductivity（20℃）||Temperature Coefficient (Parameter)（20℃）|
Appendix 2: Technical Specifications for the Sigma Conductivity Tester
|Product Model Project||Sigma 2008||Sigma 2008B, C|
|Operating Frequency||60KHz Sine Wave||60 KHz and 500KHz|
|Electrical Conductivity Measurement Range||From 0.8% IACS to 110% IACS, 0.46 MS/m to 64 MS/m or resistivity from 0.01560 to 0.02170 ohm·mm²/m.|
|Resolution||0.01 %IACS (when less than 51% IACS); 0.1% IACS (within the range of 51% IACS to 110% IACS)|
|Measurement Accuracy||±0.5% (when the temperature is at 20℃); ±1% (when the temperature is between 0℃ to 40℃)|
|Lifting Effect||Probe compensation is 0.5mm|
|Temperature Measurement||0℃ to +50℃ (with an accuracy of up to 0.5℃)|
|Automatic Compensation Function||The conductivity measurement result is automatically corrected to the 20℃ value|
|Normal Operating Environment||Temperature from 0℃ to +50℃, relative humidity from 0% to 95%|
|Display||Large LCD screen, with backlight, displays multiple important parameters simultaneously.|
|Power Supply||Three AA rechargeable batteries (Ni-MH) or three 1.5 volt AA alkaline rechargeable batteries can work continuously for more than 16 hours (without backlight).|
|Probe||Type A machine is equipped with a probe of 14mm diameter and a working frequency of 60KHz.Type B and C machines are equipped with a probe of 14mm diameter with a working frequency of 60KHz and a probe of 8mm diameter with a working frequency of 500KHz.|
|Reading Storage||Can save 500 measurement data files|
|PC Communication Method||RS 232 serial port|
|Mainframe Weight||0.5KG (including battery)|
|Instrument Casing||High impact-resistant, waterproof engineering plastic shell|
|Packaging and Protection||High impact-resistant, waterproof aluminum alloy portable case, equipped with instruments, probes, communication cables, operation manuals, conductivity standard blocks, chargers, and instrument stands|
|Attachments||Three random conductivity standard test blocks are included, and more standard test blocks are available for purchase by the user.|