6
Signet 3719 pH/ORP Wet-Tap
The electrode in any pH or ORP system
requires periodic service, calibration or
replacement. When removing the electrode
from the Wet-Tap assembly, it is very important
to exercise caution and follow the instructions
carefully.
1.
Remove the preamplifi er from the top of
the Wet-Tap assembly.
2.
Turn the locking shroud
1
/
4
-turn clockwise
to unlock the piston.
3.
Pull up on the locking shroud to retract the
electrode piston into the pipe.
If the piston does not retract easily, or if any fl uid is observed leaking from the electrode
threads, the pipe must be drained before the 3719 can be safely removed.
• Stop the fl ow and depressurize the pipe.
•
Remove the entire 3719 assembly from the pipe.
•
Remove the electrode from the assembly
•
Clean any scaling and debris found on or in the piston tip and surrounding area.
2
3
4
5
1
5
3
4.
Turn the locking shroud ¼-turn
counterclockwise and lift up to remove it from the Wet-Tap
assembly.
5.
Remove the electrode by turning it counterclockwise.
For safety, keep your body clear of the top of the Wet-Tap
assembly while removing the electrode.
DANGER!
The piston should retract easily from a pressurized pipe.
If the piston off ers resistance, there is a danger that the
piston is coated with deposits from the process.
STOP! DO NOT FORCE THE PISTON UP!
It may damage the O-rings or break off the piston tip.
Return the locking shroud to the LOCKED position and follow the
steps in the box below.
DANGER!
If any fl uid is observed leaking from the electrode
threads, STOP! DO NOT REMOVE THE ELECTRODE.
There is a danger that the piston tip has been damaged.
Tighten the electrode back down to reseal the assembly
and follow the steps in the box below.
Electrode Removal
