Baker Hughes Ultrasonic Flow Meter for Liquid Custody Transfer Measurement Sentinel LCT4

- The sensor ports contain the sensors and sensor wiring. These ports should only be serviced by properly trained and qualified service technicians. Modification or alteration in any manner may degrade the performance of the system.

- Required equipment • 10 mm hex drive socket or wrench

• 12 mm hex drive socket or wrench

Instructions to relieve pressure in the sensor port or transmitter interface

- To relieve the pressure in the system, refer to Figure 56 and Figure 57 below and complete the following steps: 1. Locate the upstream “A” plane sensor quadrant. This quadrant can be found by locating the tag plates on the pressure vessel. It is also easily identifiable, as the Sentinel LCT4 has only the “A” Plane.

2. Relieve potential pressure build-up by loosening the Pressure Relief Plug on the bottom of the Upstream “A” Plane Sensor Quadrant as shown in step 1 on the previous page, using a 10 mm hex tool. Slowly loosen the pressure relief plug 2-3 full turns or until the plug bottoms out on the built-in safety stop.

3. Listen and observe: a. If any hissing is heard (air or gas release), stop loosening the plug and wait for the hissing to stop. If hissing continues for more than 10 minutes, retighten the plug and consult Panametrics.

b. If any liquid discharge is observed, stop loosening the plug and retighten completely.

c. If no hissing or discharge is observed and the plug has been backed out to the safety stop, then any pressure buildup has been released and the ports are now serviceable.