Application The system is suitable for verification of all types of electronic watthour meters and single phase time-of-use induction watthour meters, single phase multi-rate watthour meters, single phase prepaid watthour meters and single phase watthour meters, as well as the active positive and negative phase power verification. Functions and features The outer casing is made of special aluminum-alloy material so that the system has a solid covering and beautiful appearance, easy to operate and transport with light weight. With multiple rapid digital protection systems, the device has high reliability and sound and light warning module. Special keyboard is provided to indicate automatically the frequent occurrence in time of manual inspection, very conveniently and rapidly. As required by the protocol, full automatic test can be carried out on watthour meter's startup, creeping, fundamental error, standard deviation, 8-hour and 24-hour variation. Impact test on watthour's frequency, harmonics , etc. can be performed. Special junction box is employed to short circuit automatically in open circuit. With the automatic collection of mechanic meter black spots, it is convenient to make creeping and startup tests . Special photoelectric sampler is featured with automatic collection of mechanic meter black spots and electronic meter LED signals. Special pulse sampling interface and high voltage isolating circuit are adopted to avoid wrong switchin of high voltage.. Meter running test can be performed according to KWh, time or pulse number. The real-time parameters, such as power,voltage, current, phase, power factor, frequency, etc. can be measured. All types of bar codes input is acceptable. With RS485 port, it is very convenient to connect with all kinds of foreign and domestic watthour meters. Automatic detection of communication protocol function is available. The communication protocol complies with all stipulations of DL/T645-1997 and IEC1107, and it can be modified as user's requirement. Meter slot number: 48 Other functions With special connection and EMCS2002 meter calibration software, we can carry out calibrations for single phase multifunction and multi-rate watthour meters at one time without changing the connection. The following tests can be combined at random or be performed separately, very conveniently and swiftly. Day timing error test Time interval switching error test Multifunction meter running test (combined meter running error test) Various communication test Meter address read and setting Time interval and zone setting GPS broadcast time correction Register composite error test Constant calibration Reading meter data arbitrarily Meter serial number reading and inspection Various password and code verification and setting Technical specification power supply: ~220V/16±10%,50HZ device configuration: equipment grade: class 0.1; standard meter class 0.05 equipment grade: class 0.2; standard meter class 0.1 voltage measuring range: 220V current measuring range: (0.05?0.1?0.25?0.5?1?2.5?5?10?25?50?100)A voltage,current regulating range: 0~120%,regulating fineness:0.002%; voltammeter accuracy: 0.1%,phase accuracy:0.2°,frequency monitoring meter accuracy:0.01HZ; phase regulating range: 0°~360°,regulating fineness:0.01°; frequency regulating range: 45HZ~65;regulating fineness:0.001HZ voltage loop capacity: 15VA per meter slot current loop capacity: 1000VA(48meter-slot)500VA(8~24meter-slot) output power stability: better than 0.02%/2min, voltage, current waveform distortion: better than 0.5%; ED455G:time reference frequency:1HZ?500KHZ(TTL level), stability:5×10-9/per day, accuracy:1×10-7; meter slot number: 48-meter slot