Abstract: Systems for monitoring sensed parameters and diagnosing fault conditions are useful in many applications. Advantageously, such systems are capable of operating in a plurality of operating modes and in connection with each of a plurality of machines. In the subject invention, a plurality of gauges are included for indicating the levels of the sensed parameters. A plurality of symbols are included for identifying sensed parameters. A control receives an identification code and selectively illuminates one or more of a plurality of gauges and symbols in response to the identification code. A plurality of warning lights are each associated with a switch-type input. A display selectively indicates a pin code for each switch-type input having a fault condition. The indicator lights having an associated switch-type input in the fault condition are flashed. A device selectively indicates a pin code in response to each diagnosable input having a present or a previous fault condition.

Abstract: A generic solenoid driver circuit and circuit board may be used in a plurality of application specific driver circuits. The circuit board includes a plurality of binary driver circuit locations, proportional circuit locations, and jumper locations. Electrical components are inserted at those locations needed for the circuit to perform the functions of the specific application. Microprocessor controlled switches may be substituted for the jumper locations so that the solenoid driver circuit configuration may be software controlled.

Abstract: Instruments are often designed to operate in connection with a variety of machine types. Advantageously, such gauges are sufficiently flexible to indicate the levels of parameters in either a high warning or a low warning format. In the subject invention, a gauge includes a plurality of indicating segments being selectively illuminable for indicating the levels of the sensed parameter in the normal operating range, a high warning segment being selectively illuminable for indicating the level of the sensed parameter being above the normal operating range, and a low warning segment being selectively illuminable for indicating the level of the sensed parameter being below the normal operating range. An identification code is produced and received by an instrument which responsively enables one of the high and low warning segments.

Abstract: Gauges for indicating the level of sensed parameters are often provided in connection with a variety of machines. Advantageously, such gauges are sufficiently flexible to indicate the level of a parameter having a warning level that is dependent upon the level of a second sensed parameter. In the subject invention, a gauge indicates the level of a primary sensed parameter having a normal operating range. A sensor produces a signal indicative of the level of a secondary sensed parameter and the levels of the primary sensed parameter associated with the normal operating range are modified in response to the level of the secondary sensed parameter.

Abstract: Instruments are often designed to operate in connection with a variety of machine types. Advantageously, the instrument is capable of modifying the appearance and function of its displays in response to the machine to which the instrument is connected. The subject invention includes a device for producing an identification code and a plurality of gauges for indicating levels of the sensed parameters. Each of the gauges has an outline segment for illustrating a range of levels of the sensed parameter indicated by the gauge and a symbol for identifying the sensed parameter indicated by the gauge. A controller receives the identification code and selectively enables one or more of the plurality of gauges and illuminates the outline segment and symbol associated with each of the enabled gauges in response to the identification code.