With this portable instrument, you can safely test and measure very quickly all diodes, zeners, LEDs, etc... in their actual conditions of use, that is with a known and adjustable current, and up to a significant voltage (opposite to classic DVMs : unknown current, output limited to 3V or less). You can see the light efficiency from a LED, connect LEDs in series to make a visual selection, characterize a zener knee, estimate the leakage current of a diode with temperature, measure the avalanche voltage of a junction, measure very high resistances up to 2 gigaohms, and even capacitors with help of ... a stopwatch !
You can also disconnect the current source and use the instrument as a simple DVM with the particularity of a very high input impedance.
Main characteristics :
20 output current values from 10nA up to 20mA in 1-2-5 steps.
1.4% + 100pA output current precision
20V maximum output voltage.
Adjustable output clamping voltage from 1V up to 20V with LED indicator.
Integrated 3.5 digits two-range high impedance voltmeter.
0.2% voltmeter precision
4 x AA cells power supply.
110 hours battery life @ 1mA output