Rosemount Manual: 247 Economy Toroidal Conductivity Sensor | Rosemount Manuals & Guides

Model 247

Economy Toroidal Conductivity Sensor

Instruction Manual

PN 51-247/rev.A
September 2002

CAUTION

SENSOR/PROCESS

APPLICATION COMPATIBILITY

The wetted sensor materials may not
be compatible with process com­position and operating conditions.
Application compatibility is entirely the
responsibility of the user.

DANGER

HAZARDOUS AREA INSTALLATION

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

Intrinsically Safe or

Explosion Proof.

To secure and maintain an intrinsically safe
installation, the certified safety barrier,
transmitter, and sensor combination must
be used. The installation system must com­ply with the governing approval agency (FM,
CSA or BASEEFA/CENELEC) hazardous
area classification requirements. Consult
your analyzer/transmitter instruction manual
for details.

Proper installation, operation and servicing
of this sensor in a Hazardous Area Instal­lation 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 [phone] 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.

• Ensure that all equipment doors are closed and protective
covers are in place, except when maintenance is being
performed by qualified persons, to prevent electrical shock
and personal injury.

Emerson Process Management

Rosemount Analytical Inc.

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

http://www.raihome.com

© Rosemount Analytical Inc. 2002

CAUTION

BEFORE REMOVING THE SENSOR, be
absolutely certain the process pressure is
reduced to 0 psig and the process temperature
is at a safe level!

MODEL 247 TABLE OF CONTENTS

MODEL 247

ECONOMY TOROIDAL CONDUCTIVITY SENSOR

TABLE OF CONTENTS

Section Title Page

1.0 MODEL 247 SENSOR............................................................................................. 1

1.1 General .................................................................................................................... 1

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

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

1.4 Accessories.............................................................................................................. 2

1.5 Sensor Installation ................................................................................................... 3

1.6 Sensor Wiring .......................................................................................................... 5

1.7 Sensor Calibration ................................................................................................... 7

1.8 Sensor Maintenance ................................................................................................ 7

1.9 Troubleshooting ....................................................................................................... 7

2.0 RETURN OF MATERIAL......................................................................................... 9

LIST OF TABLES

Table No. Title Page

1-1 Specifications: Sensor ............................................................................................. 1

1-2 Specifications: Adapters .......................................................................................... 1

1-3 Sensor Resistance Check ....................................................................................... 8

1-4 Resistance vs. Temperature .................................................................................... 8

i

MODEL 247 TABLE OF CONTENTS

TABLE OF CONTENTS (CONTINUED)

LIST OF FIGURES

Figure No. Title Page

1-1 Sensor Dimensions.................................................................................................. 2

1-2 Model 247 with Mounting Adapter: Kit 23986-00 .................................................... 3

1-3 Model 247 with CPVC Union: Kit 23986-01 ............................................................ 3

1-4 Model 247 in Custom Flow-Tee: Kit 23986-02 ........................................................ 4

1-5 Wire Functions......................................................................................................... 5

1-6 Wiring to Model 1055-10-21-31 ............................................................................... 5

1-7 Wiring to Model 1055-11-21-31 ............................................................................... 6

1

MODEL 247 SECTION 1.0

MODEL 247 SENSOR

SECTION 1.0

MODEL 247 SENSOR

1.1 GENERAL.

Rosemount Analytical Toroidal Conductivity Sensors
are ideal for use in processes where conventional
sensors -- those with electrodes exposed to the
measured solution -- would corrode or become fouled.

The Model 247 Economy Toroidal Conductivity Sensor
consists of wire-wound toroids that are isolated from
the process. One toroid acts as a transmitter and the
other as a receiver. Energizing the transmitter toroid
induces an electric current into the process solution
which induces an electric current into the receiver
toroid. The strength of that induced current is directly
proportional to the conductivity of the solution.

The Model 247 sensor is constructed with a solvent­welded CPVC body which makes it durable and
chemically resistant to most dilute acids, bases, and
inorganic salt solutions. The sensor’s integral Pt 100
RTD ensures accurate temperature compensation.

The Model 247 sensor is easy to install. The toroidal
sensor is not sensitive to flow rate or direction. It can
be installed using PVC* fittings readily available at
local hardware stores or with CPVC fittings offered
here as accessories.

All these features make the sensor ideal for applying
to cooling water treatment, boiler blowdown, and
metal plating processes.

The Model 247 CPVC Toroidal Conductivity Sensor is
compatible with Rosemount Analytical instrument
Model 1055-21 or -31.

*Carefully check the manufacturer’s pressure and tempera­ture limits for any adapters not supplied by Rosemount
Analytical. PVC adapters typically have lower pressure and
temperature ratings than those specified here for CPVC.

TABLE 1-2. Adapters

TABLE 1-1. Sensor

MODEL

Description Materials of Construction Temperature Pressure

23986-00 Mounting Adapter, CPVC 165°F (75°C) 100 psig (790 kPa abs)

1” slip x 1” MPT

23986-01 Union, CPVC, Viton

®

165°F (75°C) 100 psig (790 kPa abs)

1” slip x 1” slip

23986-02 Tee, Flow-through, CPVC, Viton

®

150°F (66°C) 100 psig (790 kPa abs)

2” with slip union

1.2 SPECIFICATIONS

Installation Type Submersion, Flow-Tee

Conductivity Range 500 microSiemen/cm to 1 Siemen/cm

Maximum Temperature 165ºF (75ºC)

Maximum Pressure 100 psig (790 kPa abs)

Wetted Materials CPVC

Shipping Weight 1.9 lbs (0.9 kg)

®

Viton is a registered trademark of DuPont Dow Elastomers.