Panametrics Sentinel User Manual page 110

Chapter 6. Transducer Replacement
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).
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.
110
Danger Zone!
Keep hands clear as
much as is practical.
Relief Valve
Figure 11: Transducer Retracted
Positive Stop
Transducer
Retracted
Ball Valve
(closed)
Sentinel™ User's Manual