We’d like to propose you to install the power transducer, model LTWT at each electric power inlet point. The LTWT take in AC active power and provide a DC output signal and pulse signal proportionally. And then please put the pulse output signal into the PC Recorder module, the R1M-P4. The R1M-P4 takes in the pulse signal as totalized counter input.

You can monitor the totalized pulse record on the PC Recorder software on your PC via RS-232C. PC recorder software, MSRPAC-2005 is coming along with the R1M-P4 for free of charge. The R1M-P4 has counter reset function. Therefore if you need to monitor every 30-minute amount of power, please set an external timer-controlled relay and apply a contact input to the R1M-P4 in every 30-minute as counter reset signal.

Demand Monitoring Contract
(example in Japan)
Amount of power usage in every 30-minute is contracted between Power Company and Commercial-Scale utility customers. It is called “Demand Monitoring Contract” in Japan. If customer’s amount of power usage goes over the contracted limitation, penalty charges will be required and/or next coming amount of power contraction will be expanded automatically.