Panametrics Sentinel, User Manual, Page: 110 / 166

Chapter 6. Transducer Replacement
110 Sentinel™ User’s Manual
6.4.1 Removing the Old Transducer from a Pressurized Pipe (cont.)
7. Using the hydraulic pump valve, slowly release pressure from the hydraulic ram until the transducer has
retracted to the positive stop in the mechanism (see Figure 84 below).
Figure 11: Transducer Retracted
8. Close the ball valve and secure it in the closed position. Lock the ball valve in place using an appropriate LOTO
(lock-out, tag-out) device and tags.
9. Open the pressure relief valve to release the pressure of any gas trapped in the holder, then close the pressure
relief valve and torque it to 15 ft-lb.
10. Disconnect the hydraulic pump and remove the insertion mechanism.
11. Remove the T11 transducer assembly from the pipe and then remove the pusher and the 4-bolt sensor flange
from the transducer.
The T11 transducer removal procedure is now complete.
Transducer
Retracted
Danger Zone!
Keep hands clear as
much as is practical.
Ball Valve
(closed)
Relief Valve
Positive Stop