RESOL WMZ energy meter.The RESOL WMZ calorimeter module is a processing unit that makes available state-of-the-art electronic microprocessor intelligence for heat measurement in every measurement range. In combination with contact (pulse) water meters of different flow ranges, it is designed for use in solar or hydronic heating systems from small residential to large commercial scale.
The WMZ energy meter is available pre-packaged with temperature sensors and contact (pulse) water meter V-40 in seven different versions. Adjustable impulse rate in steps of 1L/ pulse permits precise flow reading right across the measurement range spectrum of 0 - 99 L/pulse.
RESOL V- 40 is a Multi--Jet contact water meter. The Multi-Jet impeller meter is a completely dry runner designed with a carbide bearing for the impeller and a magnetic coupling. The meters produce a closed contact electrical pulse output via a reed switch connected to the processing unit. The V-40 Multi-Jet contact water meter offers the benefit that an even load is applied on the impeller, making this meter largely insensitive to faults on the inlet and outlet side. With maximum working pressure of 232 PSI (16 bar) and maximum operating temperature up to 266 °F (130 °C), V-40 meters are characterized by extremely high measurement accuracy and excellent measuring stability even when subjected to extreme loads. The V-40 is available as a separate ad-on kit including a pair of sensors and sensor wells. The model V40-06 is the smallest meter in ¾" NPT with nominal flow rate of 2.64 GPM (0.6 m3/h) and V40-150 is the largest one in 2" NPT and nominal flow rate of 66 GPM (15m3/h).
The RESOL WMZ calorimeter module offers all the performance features of the compact processing unit. The heat quantity produced is calculated from these impulses and the temperature difference measured between supply and return using predefined parameters (glycol type, concentration, heat capacity etc.). The temperature sensors are platinum type Pt1000 supplied with NPT sensor wells.
Graphic-display for indication of supply and return temperature, heat quantity, energy output, flow rate and sensor faults (accumulated values are stored in the case of a power failure). WMZ is well suited for solar systems with 0 ... 70% propylene-glycol-mixtures, closed or open loop systems. Built-in data interface (VBus) permits the processing unit to be integrated into universal RESOL VBus system.
Now about the practical use: the RESOL WMZ calorimeter module can be installed as a stand-alone energy meter, or as an ad-on module to RESOL DeltaSol BX, ES, E or MX controllers. It communicates via VBus with RESOL remote displays SD3 and large customizable GA3. In conjunction with RESOL data logger DL2 up to 16 individual WMZ modules could be monitored remotely from a single location.
In applications where third party differential controllers are installed, adding WMZ could solve the problems of system monitoring, energy metering, remote displaying and data logging.
The RESOL WMZ calorimeter module is available as 115V version or as special order in 12V/DC.
