Application:
Model DSD4000 is developed to satisfy industrial demand, which is provided with world leading level by using digital sampling technology and SMT process. This meter may precisely measure positive /negative active/reactive energy, power, voltage, processing with reference to relative tariffs and demand. The product conforms to all technical requirements to multi-function meter specified in GB/T17883-1999(IEC60687)、GB/T17882-1999（IEC61268）、DL/T614-1997、DL/T645-1997.

Functions and features:
1.measuring positive and negative active energy in each time interval. Measuring reactive energy in four quadrants in each time interval. Measuring max demand for positive/negative in each time interval.4tariffs,10 time segments per day and 4 time zone per year. Phase failure, power-off & voltage-drop inspection.

2.RS485 communication interface & PC can be used for communication, meanwhile HHT (Hand Held Terminal) also can be used for programming, transcribing and data-collecting function. Reading data by using infrared remote controller manually.

3.To display preset parameter and measure data by LCD. Parameters, (no more than 32 ones) scroll display, display time and sequence could be preset freely. Positive active/reactive remote pulse output port. Real-time measure the RMS of voltage, current values and current frequency of phase A,B and c. Programming prohibition, data clear and demand reset.

4.the internationally advanced integration circuits specially used for kilowatt-hour meter, permanent information keeping non-voltage storage and other hardware and software measurements are employed to prevent the meter form losing data at times when both AC power supply and internal support battery lost voltage.