We are used to seeing oscilloscopes with built-in features such as function generators, DVMs and spectrum analysers but now Keithley have switched the tables and produced a DVM or ‘Graphical Sampling Multimeter’ with a built-in waveform capture/display feature. The DMM7510 has a 5 inch capacitive touchscreen interface displaying measurements to 7½ digit accuracy and a waveform capture capability of 1Msample/s using an 18-bit digitiser.
According to the data sheet the DMM7510 features a low noise input stage with a 32-bit A/D converter giving the instrument DC accuracies that are typically only available with metrology-grade instruments. The instrument has good sensitivity featuring 100 mV, 10 ohm and 10 microamp full scale measurement ranges.
The meter also includes measuring ranges for capacitance, ACV and ACI, temperature (RTD, thermistor and thermo-couple), 2- and 4-wire resistance, dry circuit ohms, period, frequency, diode test and DC voltage ratio. In addition to the touch screen GUI the DMM7510 includes a USB 2.0 port to store test results and screen images, a HELP key, a rotary navigation/control knob and a front/rear input selector button. The front panel buttons are backlit and Keithley include their Test Script Processor system and SCPI programming mode. This allows test scripts to be run directly on the instrument without the need for an external PC.