1. Brief introduction
LU-DP4W is just for measuring of single-phase electric energy; the other functions of it are same as the functions of LU-DP4M.

2. Main technical parameters
◆ Accuracy: 1% RD
◆ Display: 4 bits LED numerical code tube
◆ Measurement parameters: electric energy
◆ Input
   Voltage: Rated voltage: AC420V/AC100V
           Over load: continued: 1.2 times; instant: 2 times (10 seconds)
           Power consumption: <0.5VA
           Impedance: >1MΩ
   Current: Rated current: AC5A/AC1A
           Over load: continued: 1.2 times; instant: 10 times (5 seconds)
           Power consumption: <0.4VA
           Impedance: <20mΩ
   Frequency: 45~65Hz
◆ Output:
   RS232 or RS485 or RS232 printer interface
◆ Power: AC85～265V，DC85～330V (standard)
          AC30～60V，DC18～90V (optional)
          Consumption: <4VA
◆ Communication: RS485/RS232 communication interface
 Modbus-RTU protocol
◆ EMC
   Surge immunity test: GB-T 17626.5-1998 (Ⅳ)
EFT test: GB-T 17626.4-1998 (Ⅳ)
Radio-frequency, electromagnetic field immunity test: GB-T 17626.2-1998 (Ⅲ)
   Electrostatic Discharge Immunity Test: GB-T 17626.6-2008 (Ⅳ)
   GB-T 17626 is in accordance with IEC 61000.
◆ Working environment: temperature: -10℃～+55℃; humidity: 20%～95%, without condensation
◆ Storage environment: temperature: -25℃～+85℃; humidity: 20%～95%, without condensation
 

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