초록 ▼

A plurality of probes for sensing their fluid environment are electrically connected to a controller. The controller includes an alarm transducer, relays, a keyboard, and a display connected to a microprocessor and associated memories. Under keyboard control and software direction the microprocessor

A plurality of probes for sensing their fluid environment are electrically connected to a controller. The controller includes an alarm transducer, relays, a keyboard, and a display connected to a microprocessor and associated memories. Under keyboard control and software direction the microprocessor is operable in a monitor mode in which it monitors the probes and activates the transducer, relays, and display in response to probe signals corresponding to selected alarm conditions, and in a program mode in which the alarm conditions, relay latching conditions, and probe to relay assignments may be selected via the keyboard. A hardware timer interrupts the microprocessor periodically to clock a software timer which provides six second and six minute timers. When monitor mode is exited, the six second timer is reset and if a security code is not entered in six seconds the timer elapses and the system returns to monitor mode. Similarly, when program mode is entered, the six minute timer is reset and if no program entries are made in six minutes, the system returns to monitor mode. The six minute timer is reset each time a program entry is made and is delayed so long as probe to relay assignments are being made.

대표청구항 ▼

A fluid detector comprising: a plurality of probe means for sensing their fluid environment, each probe means including means for providing one or more of the following probe signals: a hydrocarbon signal indicative of the presence of hydrocarbon in the probe environment, a water signal indicative o

A fluid detector comprising: a plurality of probe means for sensing their fluid environment, each probe means including means for providing one or more of the following probe signals: a hydrocarbon signal indicative of the presence of hydrocarbon in the probe environment, a water signal indicative of the presence of water in the probe environment, and a dry signal indicative of a dry probe environment; manual entry means for selecting one or more alarm conditions; memory means for storing said one or more selected alarm conditions; timing means for clocking a predetermined time; processing means for receiving said selected conditions and storing them in said means for storing and for monitoring said probe signals and providing an alarm signal upon receiving one or more probe signals corresponding to one or more of said selected alarm conditions, said processing means capable of operating in a monitoring mode in which it monitors and processes said probe signals and a programming mode in which it receives and stores said one or more selected alarm conditions; means for resetting said timing means upon entry of one or more predetermined entries on said manual entry means and for placing said processing means in said monitoring mode after said timing means clocks said predetermined time; and alarm means responsive to said alarm signal for providing an alarm.