Measuring instrument testing equipment – ​​precise and professional

We refer to test meters with an integrated source as test systems. Meter test equipment is particularly useful when you require custom current and voltage values ​​when testing meter installations, but only want to use a single device. Stationary and mobile test systems are used to test electricity meters. Examples include accuracy tests, single-phase meter tests, and multi-phase meter tests. Please consult a professional technician if you would like to test an energy meter. We consider your individual needs from your perspective and develop innovative solutions that can be seamlessly integrated into your existing processes. The quality guarantee "Made in Germany" applies not only to products but also to our professional advice and service. Let an expert advise you in detail on testing your energy meter. Energy meters measure much more than just the precise power consumption of electrical devices.

Testing energy meters – The most important features

Test and measurement products include instruments and devices used to measure electrical and environmental quantities for design, diagnostic, quality control, or monitoring purposes. Examples include oscilloscopes, multimeters, test bench power supplies, thermocouple probes, test leads with function generators, barometers, data loggers, and sound level meters. We offer a wide range of products for meter testing, from the smallest devices the size of a single-phase meter to customized semi-automatic devices with over 40 measuring stations. The most important characteristic of a device for testing an energy meter is its measurement accuracy.

Small annual deviations can lead to large errors. After adjustment, the measuring device is calibrated at the factory to a predefined standard load point. The measurement uncertainty stated in this calibration and this calibration certificate guarantees that the measurement results are directly traceable to the PTB (Physikalische Technische Bundesanstalt). If you have any questions, concerns, or uncertainties, you can always consult our experts.

Electricity meter testing – Convince yourself of our expertise

In 1920, Wilhelm Cremer founded the Institute for Instrument Calibration and Repair in Königswinter am Rhein. ZERA soon became known abroad for its ingenuity and passion for precision. Over the years, ZERA has evolved from a meter calibration provider to a highly specialized manufacturer of portable and stationary test equipment for all types of meters and transducers. Our solutions have had a decisive influence on the technological development of testing technology. In 1950, ZERA developed the first electromechanical indicator, followed by an electronic meter tester with an accuracy of 0,1%. In the late 1990s, ZERA introduced the first comparator using digital technology with an accuracy of 0,01%. The first primary standard, PPCS, for metrology institutes was created in 2008. ZERA test systems achieve the highest globally recognized accuracy classes. In early 2000, our calibration laboratory was accredited by the German Calibration Service (now DAkkS). ZERA is an international company with local roots, developing and manufacturing in Germany but exporting more than 80% of its products worldwide. Precision begins with us. We can say that today. We know that the extraordinary success of the past decades was only possible thanks to the people who have supported the company with their knowledge, ideas, and passion for quality.

While the market has changed dramatically over the past 100 years, our corporate values ​​have remained the same: an unwavering commitment to the highest precision and quality, absolute reliability, and compelling customer focus. We understand the needs of the industry and our customers from decades of experience. Our engineers and consultants consider individual requirements through our customers' eyes and develop innovative solutions that can be seamlessly integrated into existing processes. Our Made in Germany quality standard applies not only to our products, but also to professional consulting and excellent service.

Measuring instrument testing equipment – ​​portable devices

Our test meters meet various requirements. The accuracy classes range from 0,2 to 0,02. When testing meter installations and measuring devices, there is often not enough load on site to obtain reliable results. Our devices simulate up to 120 A and 500 V. We refer to a test system as a test device with integrated sources. Meter test devices are particularly useful when you require custom current and voltage values ​​for your test meter installation but only want to use a single device. We offer a wide range of test devices that cover a wide variety of inspections (accuracy classes 0,2 to 0,02). Our portable devices are primarily used for testing meter installations. We offer complete equipment for meter testing.

"Current Value" displays the current measured value in tabular form. The tabular representation of the actual values ​​provides a quick overview for error analysis. The actual value measurement helps to determine properties of network and meter installations such as leakage voltage, leakage current, current polarity errors, symmetry and asymmetry, etc. "Curve Display" displays the actual values ​​of all voltage and current channels in the form of a curve. At the same time, the voltage and current values ​​of a channel are displayed in the graphic. The graph is automatically scaled according to the size of the actual value. The current value of the harmonics is displayed in the "Harmonics" menu. Here you can see whether the current or voltage is harmonically distorted. The "Error Value" (also called "Error Measurement") represents the meter's measurement error. Here, the energy measured by the test meter is compared with the energy measured by the device under test. The energy measured by the device under test is measured by a pulse sensor or by the user by counting pulses and passed on to the tester.