Astro-Med PM-12 Overview Astro-Med, Inc. PM-12 Performance Characteristics: Form Factor: Module (proprietary interface/bus) Minimum Frequency: 20 Hz Maximum Frequency: 100 kHz Input Impedance: 100 kOhm Astro-Med, Inc. PM-12 Measurements/Features: Max input 10 VDC or AC peak Status reporting Single-ended Input type 12 step attenuation Hz or kHz measurement mode Auto-calibration Non-linearity <0.1% full scale Wide Range of frequency inputs