| 摘要 |
PURPOSE:To reduce the cost of ancillary equipment such as a stabilized power source, by inserting delay relays in power sources of at leat one or one group of electromagnetic flowmeters among the electromagnetic flowmeters. CONSTITUTION:A power source (e) is connected to the power source terminals of an electromagnetic flowmeter F1 through a switch SW and power source lines L1a (L1b). The power source terminals of electromagnetic flowmeters F2- Fn are connected to power source lines L2a (L2b)-Lna (Lnb), which are branched from the power source lines L1a (L1b). Delay relays Rl2, Rl3-Rln are connected to the power source lines L2a-Lna in series. The delay relays are operated after the switch SW is turned ON, with T/N, 2T/N, 3T/N-(N-1)T/N of an exciting period T of a low frequency being delayed, respectively. The time is set in this way. In this constitution, the price of the ancillary equipment such as a stabilized power source can be reduced. |
