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US 6,546,805 B2Granted
Process fluid transmitter with an environmentally sealed service block
AssigneeRosemount Inc.
InventorsMark C. Fandrey, George C. Hausler, Robert LaRoche
Life of this patent
Estimating the term…
Abstract
An environmentally sealed service block is mounted inside a field wiring compartment of a process fluid transmitter. The service block has field wiring terminals, sealed jumper assemblies and sealed pushbutton switches connected to a sealed cable and plug. The sealed plug plugs into a permanently sealed transmitter assembly. High impedance programming circuitry connected to the jumper assemblies and pushbutton switches is completely sealed and not subject to malfunction due to contamination present in the field wiring compartment.
Claims13
A process fluid transmitter, comprising:
- a field wiring housing having a removable compartment cover, a wiring compartment that is covered by the removable compartment cover, and the field wiring housing having at least one mounting member inside the wiring compartment and the field wiring housing having an opening adapted to receive a transmitter electrical connector;
- a permanently sealed transmitter assembly having a transmitter electrical connector disposed in the opening and accessible inside the wiring compartment;
- and
- a service block that is environmentally sealed and mounted to the mounting member, the service block including:
- terminals adapted for connection to field wiring;
- sealed programming jumper assemblies that are accessible upon removal of the removable compartment cover;
- sealed programming pushbutton switches that are accessible upon removal of the removable compartment cover;
- and
- a sealed cable connected to the terminals, the jumper assemblies, and the pushbutton switches and including a plug plugged into the transmitter electrical connector.
6 more elements
Dependencies are inferred from the claim text.