The 5450/5451 is a state-of-the-art ultra high resistance meter with 5½-digit display that integrates ADC’s traditional technologies and new DC amplifier technologies. It was designed for ease of use so that anybody who operates this instrument can get the same measurement results. The 5450/5451 will be the new standard for insulation resistance measurement or micro current measurement of various kinds of insulating materials or semiconductors.

Such a high-performance instrument, 5450/5451 is used in testing of secondary cell and semiconductor materials or testing of electronic parts such as capacitors and print-circuited boards. In addition, it can be used in various usages for insulating materials such as synthetic resins and rubbers from R&D, manufacturing to quality inspection fields.

As internal voltage source, a power supply that is capable of current source and sink up to 10 W at ±1000 V was newly developed. This new power supply also applies negative voltage. Thus, the 5450/5451 can not only measure p-channel and n-channel semiconductors or avalanche photo diodes (APD) that operate with reverse bias voltage, but also help capacitors to be charged or discharged quickly.
In addition, by setting the current limit values at will, devices are protected from overcurrent due to breakdown in semiconductor evaluation.

The 5450/5451 is capable of floating measurement. The 5451 has floating measurement capability up to 46 V peak, however the 5450 up to 1000 V peak that enables a DUT grounded at one side to be measured.

In addition to GPIB and USB, the 5450/5451 is equipped with a handler interface that can control the timing with external devices such as a automatic machine in a production line. Moreover, the embedded interlock signal prevents unintended voltage output to help operators perform safety measurement.

For ultra-high resistance or micro current measurement, the amplifier gain, the integration time and the input resistance need to be set according to its purpose. For surface or volume resistivity measurement, the electrode coefficient needs to be set. Like this, various settings are required before measurement.
The 5450/5451 contains ten types of preset conditions for surface or volume resistivity measurement using the accessory, micro current measurement by pico ammeter, capacitor leak current measurement and other measurements. Thus, such a measurement can be started quickly by just selecting the preset condition without long condition settings.
Of course, user parameter settings are also available

When the leak current of a capacitor is measured, right after DC voltage is applied, inrush current that is called charge current corresponding to the capacity flows then it decreases exponentially. This current is called absorption current that is caused by the time change during dielectric polarization inside the sample. A current flowing after the absorption current reaches equilibrium becomes leak current. Here, the time it takes the absorption current to decrease exponentially and settle into equilibrium varies depending on the dielectric materials, and is sometimes very long. To measure the leak current precisely, it is important to see if the abruption current settles down. The 5450/5451 has a function to display the time course of measured values graphically on the dot-matrix LCD display. Thus, the measured values described above can be captured visually