27
Model 764 Differential Pressure Transmitter
Section 4
the socket backshell and twist it counter-clockwise 90 degrees). Pull the
mated halves apart to separate.
Lead Wire/Connector Replacement
Lead wires are part of the connector assembly. Therefore, replacement of
lead wires requires the replacement of the connector assembly. The EGS
Quick Disconnect connector is installed on all Model 764 transmitters manu
-
factured by Cameron.
The Barton style connector assembly previously used with Model 764
transmitters is not manufactured by Cameron and is no longer available for
purchase. The EGS Quick Disconnect connector is an ideal replacement for
the Barton connector assembly.
The following procedures describe the steps required to remove or install
either connector assembly.
Removal of the EGS Quick Disconnect Connector Assembly
To remove the EGS Quick Disconnect connector assembly, perform the fol
-
lowing steps.
1. Remove the transmitter from service and de-energize it.
2. Remove the transmitter cover (see procedure on
page 25
).
3. Disconnect the red and black signal leads from the transmitter circuit
board (TB 1-7 & TB 2-6) as shown in Figure 4.2,
page 28
.
4.
Loosen or remove the two base screws on the Zero and Span mounting
bracket to provide room for the lead wires.
5. Disconnect the connector assembly, if applicable.
6.
Carefully unscrew and remove the unmated connector assembly. Take
care not to damage the wires and prevent damage to the transmitter by
using a wrench to hold the conduit hub in place while the quick discon
-
nect is loosened.
Installation of the EGS Quick Disconnect Connector Assembly
To install the EGS Quick Disconnect connector assembly (Part No.
9A-C0764-1304B), perform the following steps.
1. Remove the installed connector, as applicable.
2. Carefully insert the red and black leads of the unmated EGS Quick Dis
-
connect (QDC) connector through the transmitter conduit opening and
under the Zero and Span mounting bracket.
3.
Apply EGS QDC thread sealant (Part No. 9A-C0002-1067U) to the male
NPT threads, starting with the second thread, on the end of the QDC con
-
taining the red and black leads. Securely holding the transmitter conduit
