Transmitter with moisture draining housing and improved method of mounting RFI filters
First Claim
1. A transmitter for transmitting a process variable over cabling, comprising:
- a cylindrical housing having a process mounting disposed on a base of the housing, the housing having a first and a second compartment sharing an internal bulkhead, the second compartment tending to receive moisture and capped by a cover, the second compartment having a curved internal wall extending between a top area generally opposite the base of the housing and the process mounting at the base of the housing, the internal wall having a center defined therebetween;
a first access channel having an access channel internal wall disposed on the housing adjacent to the processmounting in the second compartment and offset relative to the center of the internal wall of the cylindrical housing, the access channel internal wall forming an intersection substantially flush with an inner surface of the second compartment, the access channel connectable to an external piece of electrical conduit containing the cabling;
a circuit in the first compartment compensating the process variable, the circuit providing the compensated process variable to a feedthrough circuit in the bulkhead;
a pair of terminals in the second compartment connected to the feedthrough circuit and to a pair of conductors in the cabling, where the transmitter drains moisture through the channel in a range of mountings;
and wherein the access channel internal wall is substantially flush with and tangent to the curved internal wall of the second compartment, and the access channel internal wall is substantially parallel with the curved internal wall at a point where the access channel internal wall meets a substantially continuous surface therebetween, so as to facilitate drainage of moisture from the second compartment.
1 Assignment
0 Petitions
Accused Products
Abstract
A transmitter transmitting a sensed process variable over a conductor includes a cylindrical housing having a terminal compartment and an electronics compartment separated by a bulkhead. The terminal compartment used for conductor connection is subject to moisture accumulation. An access channel fully intersects an internal surface of terminal compartment such that the access channel drains moisture from the terminal compartment across a range of mounting orientations. The transmitter includes a circuit in the electronics compartment for compensating a process variable and providing the compensated process variable via a feedthrough circuit assembly in the bulkhead, which in one embodiment, includes an encapsulated radio frequency interference filter, to terminals in the terminal compartment for coupling to a conductor that is connected to an external controller.
87 Citations
17 Claims
-
1. A transmitter for transmitting a process variable over cabling, comprising:
-
a cylindrical housing having a process mounting disposed on a base of the housing, the housing having a first and a second compartment sharing an internal bulkhead, the second compartment tending to receive moisture and capped by a cover, the second compartment having a curved internal wall extending between a top area generally opposite the base of the housing and the process mounting at the base of the housing, the internal wall having a center defined therebetween; a first access channel having an access channel internal wall disposed on the housing adjacent to the processmounting in the second compartment and offset relative to the center of the internal wall of the cylindrical housing, the access channel internal wall forming an intersection substantially flush with an inner surface of the second compartment, the access channel connectable to an external piece of electrical conduit containing the cabling; a circuit in the first compartment compensating the process variable, the circuit providing the compensated process variable to a feedthrough circuit in the bulkhead; a pair of terminals in the second compartment connected to the feedthrough circuit and to a pair of conductors in the cabling, where the transmitter drains moisture through the channel in a range of mountings; and wherein the access channel internal wall is substantially flush with and tangent to the curved internal wall of the second compartment, and the access channel internal wall is substantially parallel with the curved internal wall at a point where the access channel internal wall meets a substantially continuous surface therebetween, so as to facilitate drainage of moisture from the second compartment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification