发明名称 |
REMOTELY CALIBRATABLE INSTRUMENT SYSTEM |
摘要 |
<p>A two-wire, admittance-responsive instrument system in which a transmitter, receiver and calibrator are connected by a two-wire transmission line is disclosed. The calibrator repetitively transmits a calibration enabling signal causing the transmitter to increment a reference admittance for comparison to a sensed admittance corresponding to a known physical condition. The calibrator monitors the bistable output signals transmitted by the transmitter in the calibration mode, which changes state when the incremented reference admittance bears a predetermined relationship to the sensed admittance. The calibrator may then transmit additional calibration enabling signals causing preload to be established for transmitter operation.</p> |
申请公布号 |
CA1258691(A) |
申请公布日期 |
1989.08.22 |
申请号 |
CA19860521310 |
申请日期 |
1986.10.24 |
申请人 |
DREXELBROOK CONTROLS, INC. |
发明人 |
MALTBY, FREDERICK L.;HALL, RICHARD G.;KRAMER, JONATHAN L.;HOOPES, HOWARD S.;PETERSEN, STEVEN R. |
分类号 |
G08C25/00;G01D18/00;G08C19/02;(IPC1-7):G01F25/00 |
主分类号 |
G08C25/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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