Intek 100CS User Manual

WARRANTY

Intek, Inc. warrants each Rheotherm product to be free from defects
in material and workmanship under normal use and service, Intek's
obligation under this warranty being limited to making good any part
or parts thereof which shall, within one (1) year after delivery of such
product to the original purchaser, be returned to Intek with
transportation charges prepaid and which Intek's examination shall
disclose to its satisfaction to have been thus defective; this warranty
being expressly in lieu of all other warranties, express or implied and
all other obligation or liabilities on Intek's part. The purchaser will
assume all responsibility and expense for removal, decontamination
and reinstallation of equipment.

Rheotherm flow meters are manufactured under United States patent numbers 4,255,968; 4,942,763; 4,949,578; 5,485,754, and 5,752,411

Intek, Rheotherm, RheoVac, Rheovec and Rheomax are registered trademarks of Intek, Inc.

Intek, Inc.

751 Intek Way

Westerville, Ohio 43082-9057

TEL: [phone] FAX: [phone]

www.intekflow.com

TABLE OF CONTENTS

SECTION 1 ! GENERAL INFORMATION ........................................ - 1 -

1.1 INTRODUCTION .................................................... - 1 -

1.2 DESCRIPTION OF OPERATION ....................................... - 2 -

1.3 PRECAUTIONS ..................................................... - 2 -

SECTION 2 ! INSTALLATION ................................................. - 4 -

2.1 TRANSDUCER ...................................................... - 4 -

2.2 ELECTRICAL CONNECTIONS ........................................ - 5 -

SECTION 3

! OPERATION ..................................................... - 6 -

3.1 START UP .......................................................... - 6 -

3.2 GENERAL INFORMATION ........................................... - 6 -

3.3 ADJUSTING THE TRIP POINT ........................................ - 6 -

3.4 USE AS A LEVEL SWITCH (INSERTION PROBES ONLY) ................. - 7 -

SECTION 4

! MAINTENANCE ................................................. - 8 -

4.1 GENERAL MAINTENANCE ........................................... - 8 -

4.2 SPARE PARTS ...................................................... - 8 -

4.3 TROUBLE SHOOTING ............................................... - 9 -

TABLE I. TROUBLE SHOOTING GUIDE .................................... - 9 -

SECTION 5

! CUSTOMER SERVICE .......................................... - 10 -

5.1 QUESTION ON EXISTING HARDWARE ............................... - 10 -

5.2 TROUBLE SHOOTING .............................................. - 10 -

5.3 FACTORY AND FIELD SERVICE ..................................... - 10 -

5.4 DECONTAMINATION OF EQUIPMENT ............................... - 10 -

5.5 QUESTIONS ON NEW EQUIPMENT .................................. - 10 -

SECTION 6

! CUSTOM INFORMATION ....................................... - 11 -

6.1 UNIT IDENTIFICATION ............................................. - 11 -

6.2 CONFIGURATION .................................................. - 11 -

6.3 SPECIAL INSTRUCTIONS ........................................... - 11 -

Figure 1. Model 100CS Interconnect Diagram ...................................... - 12 -

Figure 2. Model 100CS PWB Layout Diagram ..................................... - 12 -

Intek, Inc. 2010

I:\OFFICE\WPMANUAL\Rheotherm\Model 100CS\MOD100CS.RVB

Manual no. A100CS9606 REV B

SECTION 1 ! GENERAL INFORMATION

1.1 INTRODUCTION

Rheotherm flow switches offer reliable flow switch protection in liquids, gases and slurries. They can
be used for flow/no flow detection, or specific low and/or high level alarms over a given 10 to 1 flow.
They are manufactured exclusively by Intek, Inc. and employ a patented thermal technique used by
industry since 1978. The unique transducer designs have protected sensors, are easy to install and
require little or no maintenance.

Each model 100CS flow switch consists of an explosion-proof electronics enclosure mounted on a
sensor head. The enclosure houses the round P/C board on which the relay and electrical interface
connector are mounted. Intek also has other switch models where the sensor and electronics are separate
units, for high temperature fluids or other conditions. In addition, a two relay flow switch is available
for indicating high and low flow conditions.

Key features of Rheotherm flow switches are:

Nonintrusive flow monitoring
from outside the flow tube.

No moving parts There are no rotating, translating, undulating or oscillating parts to wear,
stick, break or fatigue.

Chemical compatibility
metals or alloys. There are no internal seals in a TU type transducer. Most sensors are 316
SS or 316 SS and nickel braze.

Fluid pressure options

Withstands over ranging
flow rates many times higher than originally specified.

Immunity to shock and vibration

Range of application includes flow monitoring in capillary tubes to large diameter pipes or
ducts.

The model 100CS is the simplest Rheotherm flow instrument, meant for low temperature applications.
Intek, Inc. also has flow switches (Model 100FS) for high temperature liquids and gases and other
extraordinary process conditions.

The wetted surface(s) can be any of a number of corrosion resistant

to several thousand psi.

For pipe sizes from .030 to ¾ inch, flow sensing is done

No damage or change in operation will occur due to excessive

.

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1.2 DESCRIPTION OF OPERATION

Rheotherm flow switches are available with various nonintrusive and intrusive transducer designs, but
they all use the same thermal sensing technique. Two temperature sensors are used one is in thermal
equilibrium with the fluid and provides a fluid temperature reference, while the second temperature
sensor is located near a heater so that its temperature is slightly above that of the fluid. In a TU
transducer, the temperature sensors and heater are attached to the outside of the flow tube, whereas the
dual and single probe transducers have the sensors and heater located in the probe(s) that are inserted
into the stream. The amount of heat removed from the heated sensor by the stream is related to fluid
velocity. Hence, the measured temperature differential between the reference sensor and heated sensor
is a function of flow rate. Only Intek, Inc. is licensed to use this patented and trademarked method for
precision flow measurement.

Nonintrusive transducer

(TU)

1.3 PRECAUTIONS

1. Use proper input power Check the label on the unit for the input power requirements.

2. Use reasonable care in handling the flow switch. Do not try to disassemble the transducers;
there are no removable parts.

TU excessive twisting or bending can damage the sensor. The flow tubes are thin-walled

tubing.

Probes (NPT/2I, NPT/I, BF/2I, BF/I, etc.) take care not to bend the probes or damage the

tips. Do not try to remove or turn the electronics box.

3. Check the flow switch maximum temperature rating do not operate a transducer at or
subject it to a temperature above its specified limit.

4. Keep moisture out of the electronic enclosure. Once cable connections are made in the
electronic box, make sure the lid is tightly closed. Seal conduit lines if they can become wet
inside.

Example of single probe

with NPT fitting

Example of dual probe

with flange fitting

5. Keep transducer wetted surfaces clean and free of permanent layer build-up.

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6. Do not exceed pressure limits of the tube or fittings.

7. Maintain a thermally stable environment (short-term) for the transducer and adjacent line.
(See SECTION 2 INSTALLATION.)

These instructions cover installation, operation and maintenanceof Rheothermflow switches in standard
configurations. Any special information pertaining to your unit is covered under CUSTOM
INFORMATION (SECTION 6). Time should be taken to carefully read these instructions prior to
installation of the equipment. Should any questions arise or problems occur, call Intek for immediate
assistance.

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