Riken Instrumentation Ltd manufactures Trivem HT Trivecter Meter. Riken Instrumentation Ltd. Is an ISO 9001: 2000 certified company. The Trivem HT Trivecter Meter offers microcontroller based 4 quadrant measurements. It has backlit LCD display with microcontroller and RS 232 /485 communications. This meter confirms to EB Tariff requirements and also has TOD Energies with MD.