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Introduction
The SZT-4 is 2-range resistance measuring instrument. configured with hand-held four-probe detecting head or seat-type testing stand , which can be used to measure the resistivity for flake, columnar or blocky-shaped . when the semiconductor material’s resistivity within 0.01 ~ 200 ohms /CM (Customer can choose the different range according to different requirements, the minimum measured range is from 0.0001omhs to 100000omhs, according to the current file set ccuracy). certain measurement results can be mended Through adjustment of the constant current source. For example, the tested results of ordinary silicon materials must be multiplied by the detecting head correction coefficient of 0.628; the tested results of silicon material thin-thickness diffusion and conductive thin films "block resistance" must be multiplied by the correction factor of 4.53 and so on; and all conditions above can be handled through adjustment of the constant current.
SZT-4 digital type 4-probe tester is very small, operational convenient and range moderate, which is quite suitable for separating of resmelting back materials.
Working atmosphert conditions of this intrument is shown as following:
Temperature: 18-25°C
Relative humidity: 50%-70%
There is no strong electric field interference in the working room of this instrument, which is far away from the high frequency equipment.
Technical parameters
1) measuring range
(1) resistivity: 0.01-200Ω/cm
(2) block resistance: 0.01-200omhs-/
(3) resistance: 0.01-200omhs
2) digital voltmeter
(1) measuring range 200mV single range
(2) deviation: reading ±0.2%±3
(3) input resistance >10Mohms
3) constant current source
(1) electric current output 0~10mA continuously adjustable
(2) measuring range: 1mA, 10mA
(3) error: reading ±0.2%±3
4) hand-held type 4-probe test head
(a)probe space: 1mm
(b)probe machinery vacillation rate: ±1.0%
(c)probe material: High-speed needle ( if you need we also can change this into tungsten carbideφ0 )
(d) pressure: Max 2kgs
5) power supply: 220V± 10%, 50Hz, 5W
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