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5

Signet 3719 pH/ORP Wet-Tap

Turn the shroud 

1

/

4

-turn counterclockwise 

and lift it completely away from the 

electrode piston.

• 

Thread the Wet-Tap into the pipe fitting.

• 

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

5.5  Electrode Installation

  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 flush with top of electrode 

piston. Hand tighten only.

  2.  Place the Locking Shroud over electrode; 

turn ¼-turn clockwise to unlock the piston, 

then press down firmly 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 

preamplifier onto the electrode connector.

 

DO NOT ATTEMPT TO REMOVE THE 

RETRACTION HOUSING FROM A 

PRESSURIZED PIPING SYSTEM!

1

2

3

4

OR

OR

ENGLISH

1

2

3

4

OU

OU

FRENCH

1

2

3

4

O

O

SPANISH

1

2

3

4

ODER

ODER

GERMAN

2750

2720

2760

Summary of Contents for 3719

Page 1: ...trode 2757 WT DryLoc ORP Electrode 2757 WTP DryLoc plastic ORP electrode Shipping Weight Wet tap assembly 1 2 kg 2 7 lbs Electrode 0 13 kg 0 3 lb Process Connection 3 3719 11 1 in NPT 3 3719 21 2 in NPT 3 3719 12 ISO 7 1 R1 3 3719 22 ISO 7 1 R2 Performance Maximum Flow Velocity 10 ft s Efficiency 97 25 C 77 F Response Time pH 5s for 95 of signal change ORP Application dependent Drift 2 mV per week...

Page 2: ...in 8 46 in 1 50 in 2007 0280 Saddle 8 in x 2 in 8 625 in 11 3 in 5 71 in 11 3 in 1 50 in 2007 0210 Saddle 10 in x 2 in 10 75 in 12 5 in 7 04 in 13 25 in 1 25 in 2007 0212 Saddle 12 in x 2 in 12 75 in 16 0 in 9 68 in 14 00 in 1 20 in 3 Dimensions 3719 1 Wet tap 11 2 in outlet for 21 2 to 4 in saddles 3719 2 Wet tap 2 in outlet for 6 to 12 in saddles CAUTION When using these clamp on saddle fittings...

Page 3: ... pH ORP Transmitter 10 20 pH 25 0C ENTER a 3719 pH ORP Wet Tap b Low Profile PP Clamp on Saddle Fitting ASTM sizes 2 to 12 in c DryLoc pH or ORP Electrode 6 versions available see ordering infomation on page 8 DryLoc refers to the electrode connector style d 2750 or 2760 DryLoc pH ORP Preamplifier Sensor electronics e Output signal options S3 L 4 to 20 mA All of these components items a to d are s...

Page 4: ...of the 3719 system is strongly recommended Choose the 3719 version 11 or 21 appropriate to the size of the branch connection of the required fitting Use 11 for sizes 2 5 to 4 in and 21 for sizes 6 to 12 in 5 3 Installation in Pipe Sizes less than 2 5 Inches It is possible to install the 3719 into pipe sizes below 2 5 inches by creating a flow cell with standard piping components One simple solutio...

Page 5: ...electrode installed the pipe contents are exposed Electrode Piston 5 5 Electrode Installation 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 flush with top of electrode piston Hand tighten only 2 Place the Locking Shroud over electrode turn turn clockwise to unlock the piston then pre...

Page 6: ...e or sand the glass electrode surface Treat glass electrode surfaces with appropriate care to avoid breakage 6 Electrode Maintenance and Cleaning 5 6 Electrode removal 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...

Page 7: ... the pH electrode offset The mV offset will track across the entire pH range The slope is usually not affected by offset changes i e pH 7 10 mV pH 4 187 mV slope 59 mV pH Electrode Offset pH 7 buffer 25 C Theoretical pH 7 0 0 0 mV New electrode pH 7 0 25 pH 15 mV Reliable pH 7 0 85 pH 50 mV Electrode offsets greater than 0 85 pH 50 mV indicate the electrode requires cleaning or replacement See Mai...

Page 8: ... In line Preamplifier with in ISO threads and 4 6 m 15 ft cable 3 2760 31 159 001 369 In line Connector with 4 6 m 15 ft cable and in NPT threads 3 2760 41 159 001 370 In line Connector with 4 6 m 15 ft cable and ISO 7 1R threads 2007 0225 159 000 812 PP Clamp on Saddle 2 5 in x 11 2 in ASTM NPT 2007 0230 159 000 813 PP Clamp on Saddle 3 in x 11 2 in ASTM NPT 2007 0240 159 000 814 PP Clamp on Sadd...

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