True-RMS 53,000-Count Bench Digital Multimeter The CSIMS8050 is a 53,000 count bench Digital Multimeter (DMM) that has high accuracy and high stability. It contains a 24 bit A/D converter that is controlled by a single-chip computer that can operate for several ten measurement functions. It will not only read DC, AC RMS, but DC and AC mixture signals. True RMS can be measured for 1000V or 10A while the resolution of DCV is 1µV and the frequency band of voltage or current is about 20kHz, which is sufficient for most electrical measurements. The CSIMS8050 is also a frequency counter which can test pulse frequency above 2MHz or linear frequency above 200kHz, including the frequency of current. The measurements of a 50Mohm resister, 5000µF capacitor and maximum/minimum value, average value, relative value, power DB, diode, continuity are also included and useful for engineers. It has a memory function up to 30 full screens for saving test data, and a color fluorescent double digit display screen. The meter has a light-coupling RS-232C interface and software that can display, draw and record all test processes on your computer. The software has an exclusive dynamic scale which can describe very small changes of electric parameters.