5
Signet 3719 pH/ORP Wet-Tap
Pull the locking
shroud straight
up until both
O-rings are fully
seated inside
the retraction
housing.
Grasp the retraction
housing below the
locking shroud; turn the
locking shroud
1
/
4
-turn
clockwise.
1
2
The 3719 is packaged with no electrode installed, and with the electrode piston in the fully inserted position.
•
Examine the female threads at the top of the electrode piston. Do not install electrode if threads are damaged.
•
Examine the two O-rings at the lower end of the assembly. Do not install if O-rings are missing or there are any signs
of damage.
•
Lubricate O-rings with a non-petroleum based, viscous lubricant (grease) compatible with the system.
•
The pipe can be pressurized after completion of step 4.
•
DO NOT ATTEMPT TO REMOVE THE RETRACTION HOUSING FROM A PRESSURIZED PIPING SYSTEM!
Installation (Wet-Tap Into Fitting)
Lubricated
O-rings
Locking
Shroud
Retraction
Housing
Turn the
shroud
1
/
4
-turn
counterclockwise
and lift it
completely away
from the electrode
piston.
•
Thread the Wet-Tap into the
pipe
fi
tting.
•
Smaller pipes may require
bracing to support the Wet-Tap
weight and the longitudinal
forces required for operation.
•
Use an appropriate thread
sealant to prevent leaks.
•
The piping system can now be
safely pressurized.
•
Inspect the installation for leaks.
3
4
The electrode piston is locked
in position by SS locking pins.
DO NOT tamper with the
locking pins!
If the piston is depressed with
no electrode installed, the pipe
contents are exposed.
Electrode
Piston
Electrode Installation
Before installation, lubricate O-rings with a non-
petroleum based, viscous lubricant (grease)
compatible with the system.
1. Remove the safety plug from top of electrode
piston. Slide electrode straight down into
electrode piston. Thread electrode into place
until connector shoulder is
fl
ush with top of
electrode piston. Hand tighten only.
WARNING:
Do not
fl
ex the electrode when inserting
into the Wet-Tap assembly. The electrode can
be permanently damaged if it is
fl
exed during
installation.
2. Place the Locking Shroud over electrode; turn
¼-turn clockwise to unlock the piston, then press
down
fi
rmly on the locking shroud to lower the
electrode piston into the pipe.
3. Turn the shroud
1
/
4
-turn counterclockwise to lock
the piston.
4. Install the matching electronics assembly or
preampli
fi
er onto the electrode connector.
DO NOT ATTEMPT TO
REMOVE THE RETRACTION
HOUSING FROM A
PRESSURIZED PIPING
SYSTEM!
Installation continued
1
2
3
4
OR
Lubricate O-Rings
Lubricate O-Rings
2750
2760
