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US 5,689,073 AGranted
Verification circuit for a fluid handling analytical instrument
AssigneeTekmar Company
InventorsLarry J. DaPrato, Michael A. Hill
Life of this patent
Estimating the term…
Abstract
A fluid handling analytical instrument includes a controlled device and a controller operably coupled to the controlled device to selectively control the controlled device with a control signal. A sensing device is operably coupled to the controller to sense the control signal and provide a signal indicative of a status of the control signal.
Claims12
A fluid sampling system, comprising:
- a valve for controlling a sample taken from a sample enclosure, the valve having an inlet fluidly coupleable to receive such sample and an outlet;
- a controlled device;
- a controller operably coupled to the valve and the controlled device to selectively control the valve and the controlled device, wherein the controller provides a control signal to activate the controlled device;
- and
- a sensing device for sensing the control signal, the sensing device being coupled to the controller to provide a status signal indicative of activation of the controlled device.
2 more elements
A fluid sampling system, comprising:
- a valve for controlling a sample taken from a sample enclosure, the valve having an inlet fluidly coupleable to receive such sample and an outlet;
- a controlled device;
- a controller operably coupled to the valve and the controlled device to selectively control the valve and the controlled device;
- wherein a control line couples the controller to the controlled device;
- and
- a sensing device for sensing a control signal carried by the control line, the sensing device being coupled to the controller to provide a status signal indicative of activation of the controlled device.
3 more elements
A fluid sampling system, comprising:
- a valve for controlling a sample taken from a sample enclosure, the valve having an inlet fluidly coupleable to receive such sample and an outlet;
- a controlled device having terminals connectable to a source of electrical power;
- a controller operably coupled to the valve and the controlled device to selectively control the valve and the controlled device;
- and
- a sensing device for sensing a voltage potential across the terminals indicating activation of the controlled device, the sensing device being coupled to the controller to provide a status signal indicative of activation of the controlled device.
2 more elements
Dependencies are inferred from the claim text.