Rosemount Analytical TF396 Operating Manual

COMBINATION pH SENSOR

Instruction Manual

PN 51-TF396/rev.G
June 2012

MODEL TF396
with mating cable

Model TF396

CAUTION

SENSOR/PROCESS

APPLICATION COMPATIBILITY

The wetted sensor materials may not be
compatible with process com position and
operating conditions. Application
compat ibility is entirely the responsibility
of the user.

DANGER

HAZARDOUS AREA

INSTALLATION

This sensor is not Intrinsically Safe. or Explosion
Proof. Installations near flammable liquids or in
hazardous area locations must be carefully eval­uated by qualified on site safety personnel.

To secure and maintain an intrinsically safe
installation, an appropriate transmitter/ safety
barrier/sensor combi nation must be used. The
installation system must be in accordance with
the governing approval agency (FM, CSA or
BASEEFA/CENELEC) hazardous area classifi­cation requirements. Consult your analyzer/
transmitter instruc tion manual for details.

Proper installation, operation and servicing of
this sensor in a Hazardous Area Instal lation is
entirely the responsibility of the user.

ESSENTIAL INSTRUCTIONS

READ THIS PAGE BEFORE PROCEEDING!

Rosemount Analytical designs, manufactures, and tests its products to meet
many national and international standards. Because these instruments are
sophisticated technical products, you must properly install, use, and maintain
them to ensure they continue to operate within their normal specifications.
The following instructions must be adhered to and integrated into your safe­ty program when installing, using, and maintaining Rosemount Analytical
products. Failure to follow the proper instructions may cause any one of the
following situations to occur: Loss of life; personal injury; property damage;
damage to this instrument; and warranty invalidation.

• Read all instructions prior to installing, operating, and servicing the prod­uct. If this Instruction Manual is not the correct manual, telephone 1-800­654-7768 and the requested manual will be provided. Save this Instruction
Manual for future reference.

• If you do not understand any of the instructions, contact your Rosemount
representative for clarification.

• Follow all warnings, cautions, and instructions marked on and supplied
with the product.

• Inform and educate your personnel in the proper installation, operation,
and maintenance of the product.

• Install your equipment as specified in the Installation Instructions of the
appropriate Instruction Manual and per applicable local and national
codes. Connect all products to the proper electrical and pressure sources.

• To ensure proper performance, use qualified personnel to install, operate,
update, program, and maintain the product.

• When replacement parts are required, ensure that qualified people use
replacement parts specified by Rosemount. Unauthorized parts and pro­cedures can affect the product’s performance and place the safe operation
of your process at risk. Look alike substitutions may result in fire, electri­cal hazards, or improper operation.

Emerson Process Management

Rosemount Analytical Inc.

2400 Barranca Parkway
Irvine, CA 92606 USA
Tel: [phone]
Fax: [phone]

http://www.raihome.com

© Rosemount Analytical Inc. 2008

About This Document

This manual contains instructions for installation and operation of the Model TF396 TUpHFET
Combination pH Sensor. The following list provides notes concerning all revisions of this document.

Rev. Level Date Notes

A 6/02 This is the initial release of the product manual. The manual has been reformatted to reflect the

Emerson documentation style and updated to reflect any changes in the product offering.

B 4/03 Revised figure 2-3 on page 5.

C 10/05 PN 9330022 has been deleted, changed to PN 9320057 on the drawing of 4TF39603, page 6.

D 2/06 Deleted cable lengths of 8 and 12 ft, changed PN on Figure 2-1, page 4.

E 2/08 Updates of page 1, Description and Specifications and page 2, ordering information.

F 9/09 Updates on 16, DNV logo for 2008.

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MODEL TF396 TABLE OF CONTENTS

MODEL TF396

COMBINATION pH SENSOR

TABLE OF CONTENTS

Section Title Page

1.0 DESCRIPTION AND SPECIFICATIONS................................................................. 1

1.1 Features and Applications........................................................................................ 1

1.2 Specifications........................................................................................................... 1

1.3 Ordering Information ................................................................................................ 2

2.0 INSTALLATION ....................................................................................................... 3

2.1 Unpacking and Inspection........................................................................................ 3

2.2 Mounting .................................................................................................................. 3

3.0 WIRING MODEL TF396 .......................................................................................... 8

4.0 START UP AND CALIBRATION ............................................................................. 11

4.1 Sensor Preparation .................................................................................................. 11

4.2 pH Calibration .......................................................................................................... 11

4.3 Instrument Configuration for use with Model TF396 ................................................ 11

5.0 MAINTENANCE ...................................................................................................... 12

5.1 Automatic Temperature Compensator ..................................................................... 12

5.2 Electrode Cleaning................................................................................................... 12

6.0 RETURN OF MATERIAL......................................................................................... 13

MODEL TF396 TABLE OF CONTENTS

LIST OF FIGURES

Number Title Page

2-1 Dimensional Drawing ............................................................................................... 4

2-2 Flow-Through Tee with Adapter................................................................................ 4

2-3 Flow-Through and Insertion Installations ................................................................. 5

2-4 Model TF396 with Insertion Mounting Adapter......................................................... 5

2-5 Submersion Installations .......................................................................................... 6

2-6 Low Flow Cell........................................................................................................... 7

2-7 Jet Spray Cleaner ..................................................................................................... 7

3-1 Wiring to Model 1055 ............................................................................................... 8

3-2 Wiring to Models 3081, 4081, and 5081................................................................... 10

3-3 Wiring to Model 54e ................................................................................................. 10

LIST OF TABLES

Number Title Page

5-1 Ro and R1 Values for Temperature Compensation Elements.................................. 12

5-2 Temperature vs Resistance of Auto T.C. Elements .................................................. 12

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greater than typical teflon or ceramic junctions) is made of
micron-sized reference pathways allowing for ionic
exchange but preventing plugging by larger particles and will
continue to send a steady pH signal, even in the dirtiest of
applications. The field-proven TUpH reference junction tech­nology results in greatly reduced maintenance requirements.

The TUpH helical reference pathway resists reference poison­ing. Ions diffuse through the reference pathways and a
charge is passed to the reference element. The reference
element must be protected from contamination by poisoning
ions such as sulfide, mercury, cyanide, and ammonia that will
cause reference drift and offsets. The TUpH sensor's long
internal reference pathway hinders the contaminants' migra­tion to the reference element thereby providing an increased
sensor life.

All TUpH sensor models have been specifically designed for
improved performance in harsh, dirty, or abrasive applica­tions where large quantities of suspended solids are present.

The Model TF396 offers a watertight sensor-to-cable connector
that prevents cable twisting and eliminates the need for
rewiring when replacing the sensor. The sensor cable
includes an integral preamplifier cap with mating connector
and is compatible with most Rosemount Analytical analyzers
and transmitters.

MODEL TF396 SECTION 1.0

DESCRIPTIONS AND SPECIFICATIONS

SECTION 1.0

DESCRIPTION AND SPECIFICATIONS

1.1 FEATURES AND APPLICATIONS

The ion-selective field effect transistor (ISFET) pH elec­trode provides a stable pH measurement. Its rate of
response can be ten times faster than glass electrodes,
enabling better process control. Its short response time and
increased stability at low temperatures make it suitable for
use in cold processes like brine or water for cooling. Aging
effects caused by temperature fluctuations or large
changes of process pH are greatly reduced, providing
longer intervals between calibration and maintenance of the
sensor.

Because there is no glass bulb, it can be used in many
applications that restrict or prohibit pH glass electrodes due
to the risk of broken glass getting into the process. It may
also provide longer sensor life in processes that will break
or crack pH glass bulbs. By allowing direct installation into
the process, costs for laboratory analysis of sample lines
are greatly reduced.

The TUpH Reference technology includes a large area
reference junction for minimum maintenance requirements.
The reference junction provides an electrical connection
between the reference electrode and the sample, and helps
maintain a stable reference potential, regardless of the
change in sample pH. The TUpH reference electrode
junction (the entire plastic tip surrounding the ISFET
electrode) maintains a steady reference signal, even in dirty
applications, by resisting plugging (a common cause of pH
signal drift). This large reference junction area (400 times

1.2 SPECIFICATIONS

Measurement Range: 2-12 pH

Measuring element: ISFET

Repeatability: ±0.05 pH

Response time to pH change: 99% in 30 seconds step change

Wetted Materials: Code -01: Polypropylene, EPDM, Ryton, Silicon.

Code -02: 316SST, Titanium, Polypropylene, EPDM, Ryton, Silicon

Process Connections: Code -01: 1 in. MNPT front and rear facing threads

Code -02: 2 in. Tri-Clamp connection

Temperature Range: 0 to 100°C (32 to 212°F) @ 50 psig

Pressure Range: -10 to 100 psig (32 to 790 kPa [abs]) at 50°C

Minimum Process Conductivity: 75 µS/cm; nominal: 100 µS/cm

Cable Lengths: 20 ft, 50 ft (6 m, 18 m)

Weight/Shipping Weight: 0.45 kg/0.9 kg (1 lb/2 lb)

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MODEL TF396 SECTION 1.0

DESCRIPTIONS AND SPECIFICATIONS

The Model TF396 TUpHFET Non-glass ISFET pH Sensor is housed in a molded reinforced polypropylene body

with 1 in. MNPT threads suitable for insertion, submersion or flow through installation, or housed in a 316SST
body for use with a 2.0 inch Tri-Clamp fitting. The sensor includes an ion-selective field effect transistor, a patented
reference junction, a solution ground, and a recessed protective tip. The Model TF396 includes automatic temperature
compensation (Pt 100 RTD) and connector for use with a cable assembly that includes an integral cap with mating
connector and a choice of 20 or 50 ft of cable.

1.3 ORDERING INFORMATION

ACCESSORIES:

FIRST TIME INSTALLATION GUIDE

CODE PREAMPLIFIER/CABLE (Required Selection)

01 Threaded body for insertion/submersion service
02 316 SST Body for use with Tri-clamp (PN 23513-00, ordered separately)

CODE CABLE AND INTEGRAL CAP WITH PREAMPLIFIER

C08 20 ft cable
C50 50 ft cable

TF396 -01 -C08 EXAMPLE

Notes:

1

For first-time installation, cable and integral cap with preamplifier (Codes C20 or C50) must be included.

2

For installations with distances (between the sensor and instrument) of more than 50 ft; a cable extension junction box
should be used.

3

The Model TF396 is compatible with Models 54e, 1055, 81, 3081, 4081, 1056, XMT and 5081 .

MODEL

TF396 NON-GLASS ISFET pH SENSOR

CODE MOUNTING ASSEMBLIES

915240-03 Tee, Flow-through, 2 in. PVC, 3/4 in. NPT
915240-04 Tee, Flow-through, 2 in. PVC, 1 in. NPT
915240-05 Tee, Flow-through, 2 in. PVC, 1-1/2 in. NPT

11275-01 Handrail Mounting Assembly

2002011 Flow Cell, CPVC, 1 in. FNPT

24091-00 Cell, Low Flow

SQP10098-LQD 2.0 inch Tri-Clamp adapter (SQ11109; formerly PN 23513-00)

CODE REMOTE JUNCTION BOXES

23550-00 Cable extension junction box

CODE EXTENSION CABLES (requires a remote junction box)

9200273 Cable, Extension, 11 Conductor, Shielded, Unprepped

23646-01 Cable, Extension, 11 Conductor, Shielded, Prepped, per ft

CODE OTHER

2001492 Tag, Stainless Steel, Specify Marking
12707-00 Jet Spray Cleaner
23242-02 Mounting Adapter, 1-1/2 in. Insertion, 1 in. x 3/4 in.

7901631 Shroud, PVC

9210012 Buffer Solution, 4.01pH, 16 oz.

9210013 Buffer Solution, 6.86pH, 16 oz.

9210014 Buffer Solution, 9.18pH, 16 oz.

9322014 Union, KYNAR

9330022 Union, CPVC

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