The Working Standard is a precision single-phase (WS 2120) and three-phase (WS 2320) reference meter for electrical power and energy measurement, dedicated to on-site meters testing. The device can be used also as hand-held unit for local data exchange with multifunctional meters which permits local programming and data reading of multifunction meters.

The device is designed for operation in single-, two- and three-phase systems, where it evaluates and displays all individual quantities per phase and cumulative three-phase ones as well.

Universal inputs can be equipped with any combination of interchangeable precision

voltage sensors working up to 500 V and current sensors working up to 6000 A or

more.

Measurement is based on precision A/D conversion and DSP technology and enables

accurate high-speed real time evaluation of all main and informative quantities.

Beyond measurement of power, voltage, current and phase the device indicates

voltage sequence, evaluates active, reactive and apparent energy and measures

distortion and wave-form of measured signals.

The device can generate any programmed energy proportional or constant frequency

on the impulse output. This unique feature allows precision error evaluation with

minimum integration period. The device is equipped with integrated error calculator

and meter scanner capturing LED, DISK or Closed Contact output of tested meters

and snap switch for simple manual testing. Multiple optical scanners can be arranged

to wireless network for simultaneous testing of complex distribution networks with

single Working Standard. Synchronous differential mode of energy consumption is also

possible.

The device can be supplied from internal rechargeable accumulators, from external

power adapter, from car outlet or optionally also from measured voltage circuit.

Software for MS Windows enables transfer and presentation of measured data in PC.

Optional portable printer enables on-site printing of results or actual display content.

• Lightweight compact size
• Single-phase and three-phase versions, accuracy classes 0.2, 0.1, 0.05
• Color graphic display and alphanumerical keypad
• USB, RS-232 and optical interface for local data exchange with multifunctional meters according to IEC 62056-21
• Configuration and data stored in high capacity memory (min. 2 GB)
• Vector diagram and signal shape display (oscilloscope mode)
• Harmonics analysis in tabular and graphical format
• Two universal input channels for any combination of Voltage and Current probes for Power or CT / VT ratio measurement
• LED and TTL impulse outputs with programmable energy proportional meter constant or programmable frequency
• Enhanced internal database system for tested meters and measured results with search capabilities
• Enhanced self-adjusting optical scanning head
• Synchronous differential energy consumption measurement
• Optional wireless communication interface and wireless scanning head network for simultaneous testing of multiple delivery nodes
• Enhanced fast synchronization of measured data and configuration with PC
• PC software for MS Windows
• Transport case with high protection degree
• Optional portable printer for printing of results and actual display content
• Optional universal isolated input/output (relay, logic signal)
• Configurable user interface (regional and functional modifications)

• Voltage Transducer VT 2x50B
• Current Clamps CC 2x12B
• Optical Sensor OPTS 2100 with Fixing Clamp
• Power Adapter
• Car Outlet Adapter
• Transport Case
• Impulse Output Cable with BNC connector
• Impulse Input Base
• Impulse SO Cable
• Snap Switch
• Neck Strap
• USB Cable
• Software for PC (Installation CD-ROM)
• Printed User’s Guide
• Calibration Certificate from manufacturer (AP)

• Voltage Transducer VT 3x50
• Current Transducer CT 2x20
• Current Clamps CC 3x24C
• Flexible Current Probe FCP 3x1y
• Optical Communication Head OPTH 1200
• Portable Printer PP 1000
• RS-232 Cable
• Device Connectors Protective Cover
• Wireless Meter Scanner Network