Graphical measuring device that combines the advantages of easy readability of an analog display with the accuracy of a digital measuring device. It supports common measurement types (AC/DC voltage, AC/DC current, frequency, analog signal 0/2 to 10V, and 5A for current transformers). The full scale of the pointer and the scaling of the analog signal and current transformer measurement can be easily selected via DIP switches, or there is an option for automatic scale adjustment. The device can switch between voltage and current measurement during operation using an external switch. Minimum and maximum values are recorded and can be activated and reset via a jumper or external switch. The device records measurement values over a duration of 3 minutes to 14 days. The time range and the display of the trend graph of the measurement values can be switched using an external switch.