Installations for verification of electricity meters

Multifunction hand-held Working Standard of power and energy for on site meter testing Lightweight compact size Single- and three-phase versions, accuracy classes 0.2, 0.1, 0.05, 0.02 Color graphic display and alphanumerical keypad USB, RS-232 and optical interface for local data exchange with multi-functional 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 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 Two universal input channels for any combination of Voltage and Current probes for Power or CT / VT ratio, phase and burden 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)

Precision meter for electrical power and energy measurement Precision 24-bit A/D conversion and digital signal processing Single-phase and three-phase versions in classes 0.1, 0.05, 0.02, 0.01 Independent input channels (three fully independent differential voltage input circuits in three-phase version) Current measurement up to 120 / 160 / 200 A or with Current Extender up to 240 A Continuous voltage and current ranges with auto-range functionality Programmable meter constant Four independent fully programmable impulse outputs assignable to various quantities or constant frequency Direct meter testing possibility (with supplied accessories) Portable with special transport case Rack mountable with 2U form factor

Isolation voltage transformer for testing meters with interconnected current and voltage circuits The Precision Electronically Compensated Voltage Transformer CMR-U is a universal small-sized electronically controlled precision voltage transformer for galvanically isolated voltage transmission. The unity voltage ratio is dedicated for testing single-phase electricity meters with closed current and potential circuits but its versatility enables utilization in extensive applications. The built-in active shielding between input and output eliminates capacitive current from input side to the isolated output device. Highlights DIN rail mounting possibility Accuracy class 0.05, 0.02 Compensation of residual capacitive current from the input to output Operation without external power supply Unity transfer ratio of the CMR-U unit enables simple user test of functionality and accuracy Built-in short circuit, overload and misconnection protection Easy user-friendly mounting, negligible power consumption and built-in protection permit simple extension of any existing meter test equipment to closed I-P link testing capability

Isolation current transformer for testing meters with interconnected current and voltage circuits The Precision Electronically Compensated Current Transformer CMR-I is a small-sized electronically compensated current transformer unit for isolated precision current transmission. The through-hole concept and single wire capability enable any user defined current ratio. The unit is dedicated for testing of electricity meters with closed current-potential circuits and for universal step-up/down current transformation applications with excellent accuracy and dynamics. Highlights Standalone through-hole precision electronically compensated transformer with single wire capability Excellent accuracy and dynamics Remote control via serial communication Monitoring of individual contact resistance and power loss Protection against open circuit and overload Programmable load by-pass Automatic unused position by-pass Easy prepaid and smart meters testing Easy implementation to existing systems Simple user test of functionality and accuracy Accuracy maintained for any up or down current transformation

- Precision high power voltage and current source

- Modular design with simple customization

- Signal generation based on digital synthesis of the signal waveform

- High efficiency of power output stages with extremely high fidelity and noise-free output

- Switch mode output stage with efficiency better than 85%

Multifunction portable signal source with integrated working standard of power and energy Laboratory and on-site meter measurements Easy evaluation of meters under precise load conditions, using the built-in compact current and voltage source Testing of meters with closed I-P links Automatic operation with predefined load points without the need for an external computer Each source channel can be programmed with user defined harmonic content or standardized signal test shape Each source channel can be modulated with programmable Ripple control telegram Independent generation of single or three-phase loading conditions for testing, calibration and verification of meters Active, reactive and apparent energy measurement for 3 phase, 3 or 4-wire, systems with integrated error calculator and pulse output

Precision meter for electrical power and energy measurement 7” Colour Multi-Touch Screen Highest accuracy 0.01 % (optionally up to 0.005 %) Wide measuring range 0.1 mA to 120 A and 0.1 V to 600 V Extreme bandwidth 10 kHz and sampling rate 24-bit 125 000 samples/second Harmonics and interharmonics up to 200th harmonic (digital processing up to 1024th harmonic) Current and voltage inputs designed for safety category CAT IV 300 V / CAT III 600 V Digital inputs for external smart voltage and current sensors (inclusive high current AC and DC sensors) Four independent impulse inputs Four independent fully programmable impulse outputs assignable to selected quantities Programmable constant of the impulse outputs up to 4 MHz Ethernet networking for worldwide remote control and data exchange

Handling system for electricity meter testing and calibration The modular design of the stand system permits building of various capacity test equipments in accordance with laboratory requirements. The stand system may consist of up to four stands. Each of the stands has a capacity for evaluation of up to 20 electricity meters, either single-phase or poly-phase, 10 meters on one side. Construction of the system enables customized placement to fit any laboratory area for easy handling and optimal meters calibration and testing. The movable trolleys permit easy handling and optimal processing of technological operations. The trolleys can be equipped with single-phase or poly-phase quick connection mechanism. The manual wiring system for single-phase, two-phase and three-phase meters can handle up to 120 A. The trolleys can be equipped with optional Precision Electronically Compensated Transformers (CMR-I or CMR-U), enabling simultaneous testing of meters with interconnected voltage and current circuits. The mobile system is dedicated to fully automated electronic equipment ELMA or to a partial modernization of existing electromechanical systems. Static versions of various capacity meter handling systems are also available.

- Microcomputer unit for evaluation of error of the tested electricity meter

- Remotely configurable either for reflexive mark or SO output of electromechanical or LED of electronic meters.

- The reflex scanner work with coded signal to suppress false light signals.

- The auto-calibration capability significantly increases the work comfort and productivity of the test system.

- The built-in remotely controlled dividers enable to evaluate high constant meters with light impulses up to 2.5 kHz.

- Variable pre-divider enables direct measurement of standard meters with impulse output up to 500 kHz.

- The built-in manual switch enables effective local control of individual unit and data input for tests with operator interactions.

- Precision flexible AC current transformer for current, power, energy and electricity quality applications

- Accuracy up to class 0.2 %

- Accuracy specification includes wire position influence

- Symmetric flexible shielding pp for excellent suppression of strange electric fields

- Symmetric sensor coil pp for excellent suppression of strange magnetic fields

- Composite sensor core for low TC and long term stability

- Super flexible sensor cable Ø 6 mm

- High load capability

- Precision flexible AC current probe for current, power, energy and electricity quality applications

- Accuracy up to 0.2 % in amplitude and 0.1 ° in phase

- No additional error for wire position

- Symmetric flexible shielding pp for excellent suppression of strange electric fields

- Symmetric sensor coil pp for excellent suppression of strange magnetic fields Low noise, dual gain, high CMRR amplifier with precision integrator pp Low output impedance

- Super flexible sensor cable Ø 6 mm

- Low cost models with software calibration in serial EEPROM available in single or three phase version

- Extremely long sensor cable pp for large structures like buildings, towers, masts etc. (optional)

- Application tailored pp sensor cable sensitivity and frequency range (optional)

- High frequency matched pp sensor coil for broad frequency band and surge current measurements (optional)

- Calibration kit available (optional)

Precision flexible AC current probe for current, power, energy and electricity quality applications Accuracy up to 0.2 % in amplitude and 0.05 ° in phase No additional error for wire position Symmetric flexible shielding pp for excellent suppression of strange electric fields Symmetric sensor coil pp for excellent suppression of strange magnetic fields Low noise, dual gain, high CMRR amplifier with precision integrator pp Low output impedance Super flexible sensor cable Ø 6 mm Application tailored pp sensor cable sensitivity and frequency range (optional)

Automated compact system for precision laboratory testing The accuracy of the power and energy reference meter is available up to 0.01 %. The reference meter measures all main and influencing quantities inclusive harmonic analysis and distortion of the test signals. The available power and the maximum current of 240 A of extremely pure synthesized 4-quadrant test signal covers the needs of both precision and high capacity testing laboratories. The test signal can be created with user defined harmonic content. The intelligent high resolution Local Evaluation Units use reflective optical sensors scanning the marks on meter's disk and passive sensors scanning the LED output of electronic meters. The sensors are insensitive to external light condition and possess auto-calibration capability eliminating manual adjustment. The optional optical communication channel enables simultaneous data exchange with electronic meters. The built-in remotely controlled dividers enable to evaluate high constant meters with light impulses up to 1 kHz. Suspension frame for 1, 2 or 3 positions is equipped with quick-acting connector system. The optional precision electronically compensated transformers enable simultaneous test of electricity meters with interconnected current and voltage circuits. The supplied Control Software for Microsoft Windows enables multilingual operation with user definable vocabularies, user friendly configuration of testing procedures, database operations and Microsoft Office compatible user defined form of output documents to any system output device. Optional local net and database ensures automated data interchange, central evaluation and archivation in laboratories with multiple test equipments.

The Electricity Meter Test Equipment ELMA due to modular concept enables to tailor specifications to specific laboratory demand Automated equipment for electricity meter testing The accuracy of the power and energy reference meter is available up to 0.01 %. The reference meter measures all main and influencing quantities inclusive harmonic analysis and distortion of the test signals. The available power and the maximum current of 240 A of extremely pure synthesized 4-quadrant test signal covers the needs of both precision and high capacity testing laboratories. The test signal can be created with user defined harmonic content and predefined signal shapes. The intelligent high resolution Local Evaluation Units use reflective optical sensors scanning the marks on meter's disk and passive sensors scanning the LED output of electronic meters. The sensors are insensitive to external light condition and possess auto-calibration capability eliminating manual adjustment. The optional optical communication channel enables simultaneous data exchange with electronic meters. The built-in remotely controlled dividers enable to evaluate high constant meters with light impulses up to 1 kHz. The handling system has capacity of several mobile meter trolleys with 20 tested meters each. The trolleys are prepared either for manual wiring of heavy current meters or can be equipped with quick-acting connectors for lower currents. Static version of handling system is also available. The optional precision electronically compensated transformers enable simultaneous test of electricity meters with interconnected current and voltage circuits. The wireless data acquisition Hand-Held Unit with integrated barcode laser scanner enables versatile local data acquisition from the tested meters. The supplied Control Software for Microsoft Windows enables multilingual operation with user definable vocabularies, user friendly configuration of testing procedures, database operations and Microsoft Office compatible user defined form of output documents to any system output device. Local net and database ensures automated data interchange, central evaluation and archivation in laboratories with multiple test equipments.