-dgt Plus Dummy Zero μp Based Indicator, Double Input for Ac Current or Voltage Measurements. 112 Selectable Primary Ranges. Housing for Panel Mounting and Ip 50 Front Protection Degree (ip65 On Request). features: â·3 Dgt Led + Dummy Zero, μ-based â·digital Indicator, for Trms Ac Current and Voltage measurements â·dip-switch-selectable Ranges â·front Dimensions: 48 X 96 Mm â·front Protection Degree: Ip 50 (ip 65 On Request).