New polyphase meter offers the best of both worlds
06.03.03

The new Landis & Gyr ZMD120AS Dialog meter has now been released by Landis & Gyr Metering, and combines the simplicity and reliability usually only found in a Ferraris meter with the most commonly requested features for a simple low-end electronic meter. The meter is designed for direct connection at up to 100A, and has 9.5mm terminals able to take 35mm² cables. Simple and uncomplicated handling procedures mean the meter has the lowest possible installation, maintenance and operating costs. All meter parameters are set in the factory and no subsequent programming is required.

Display indicators show the presence of phase voltages, phase sequence and energy direction, together with a bar graph showing approximate power. This allows the instant diagnosis and rectification of installation wiring errors. A solid-state pulse output is standard. 

The meter is built from the ground up with reliability in mind, and offers an extended temperature range of -40ºC to +60ºC and a lightning impulse rating of 12kV. It can operate on a single phase only when necessary, and the measuring elements are completely independent.  

In the event that the meter needs to be read in situations where the power is turned off, a solar cell is optionally available. This unique feature (patent pending) provides enough power even at low light levels to operate the LCD and display electronics. The beam from a torch is more than sufficient to activate the display should the meter be in complete darkness. 

The meter uses the extremely reliable Landis & Gyr DFS measurement technology, which has been field proven in over two million meters. A high frequency test LED and a special test mode for register testing allows meter test times to be drastically reduced.