Astro-Med PM-03 Overview Astro-Med, Inc. PM-03 Performance Characteristics: Form Factor: Module (proprietary interface/bus) Minimum Voltage: 100 mV Maximum Voltage: 500 V Maximum Frequency: 5 kHz Input Impedance: 2 MOhm Astro-Med, Inc. PM-03 Measurements/Features: Max input 500 VDC or AC peak CMV 500 VDC or AC peak Isolated Input type CMR 100 dB @ DC Non-linearity <0.1% full scale Auto-calibration 12 step attenuation Peak-peak/True RMS measurement Status reporting Transformer coupled isolation