Claims
- 1. A process fluid transmitter, comprising:
a field wiring housing having a wiring compartment, at least one mounting member inside the wiring compartment and a compartment cover; a permanently sealed transmitter assembly mounted to the field wiring housing and having a transmitter electrical connector 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; the service block including sealed programming jumper assemblies, sealed programming pushbutton switches and the service block including a sealed cable connected to the terminals, the jumper assemblies, pushbutton switches and a plug plugged into the transmitter electrical connector.
- 2. The process fluid transmitter of claim 1 wherein each jumper assembly includes:
a generally polygon-shaped jumper cavity formed in the service block around electrical contacts; and a removable polygon-shaped jumper body keyed to engage the jumper cavity in two selectable positions, the jumper body having a metal jumper that contacts a different pair of the electrical contacts in each selectable position.
- 3. The process fluid transmitter of claim 2 wherein the jumper body engages the jumper cavity before the metal jumper engages the electrical contacts as the jumper body is inserted in the jumper cavity.
- 4. The process fluid transmitter of claim 2 wherein the polygon-shaped jumper body and a rim of the polygon-shaped jumper cavity provide a visible indication of jumper assembly operation when the compartment cover is removed.
- 5. The process fluid transmitter of claim 2 wherein the jumper body includes a retention spring that is compressed by the compartment cover.
- 6. The process fluid transmitter of claim 1 wherein each sealed jumper assembly comprises an O-ring seal.
- 7. The process fluid transmitter of claim 1 wherein the mounting member is formed as a mounting ear.
- 8. The process fluid transmitter of claim 1 wherein the service block includes screws that mount the service block to the mounting member.
- 9. The process fluid transmitter of claim 8 wherein the service block is field replaceable using a screwdriver.
- 10. The process fluid transmitter of claim 1 wherein the service block includes electrical transient and RFI suppression components connected to the terminals.
- 11. The process fluid transmitter of claim 10 wherein one of the suppression components is grounded to the field wiring housing.
- 12. The process fluid transmitter of claim 1 wherein the transmitter assembly includes high impedance circuits connected to the electrical contacts.
- 13. The process fluid transmitter of claim 1 wherein the transmitter housing includes a ledge shielding the sealed cable when the compartment cover is removed, and the service block includes a ground plane shielding the sealed cable when the compartment cover is removed.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation-in-part of U.S. application Ser. No. 09/519,912, filed Mar. 7, 2000, titled “PREINSTALLATION OF A PRESSURE SENSOR MODULE”.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09519912 |
Mar 2000 |
US |
Child |
09867961 |
May 2001 |
US |