Digital Panel Meters For DC Motor Control Easy to use, easy to legend and easy to calibrate with multi-turn scaling and offset presets. A 14mm red LED display makes reading easier. You can calibrate the DPM for your process in the engineering units to suit your signal. A slide in legend saves you time, and money on engraving. Simply slide in your own label. With a standard DIN 43700 case and plug-in screw terminals, you can quickly install these robust, compact digital panel meters.