Omega FP7002 Manual de usuario

FP7002/FP7002A

Flow/Temperature Transmitter

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User’s Guide

NORWALK, CT

omega.com [email protected]

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains,

and reserves the right to alter specifications without notice.

Servicing North America:

U.S.A. Omega Engineering, Inc.

Headquarters: Toll-Free: 1-800-826-6342 (USA & Canada only)

Customer Service: 1-800-622-2378 (USA & Canada only)

Engineering Service: 1-800-872-9436 (USA & Canada only)

Tel: (203) 359-1660 Fax: (203) 359-7700

e-mail: [email protected]

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FP7002/FP7002A FLOW/TEMPERATURE TRANSMITTER

SECTION PAGE

Section 1 - General Description .........................1

Section 2 - Installation .................................1

2.1 Unpacking .............................................. 1

2.2 Important Considerations Before Installation ................ 1

2.3 Flowmeter Installation .................................... 2

2.4 Electrical Connections .................................... 4

Section 3 - Maintenance ................................5

Section 4 - Calibration .................................5

4.1 Flow Calibration ......................................... 5

4.2 Temperature Calibration .................................. 6

4.3 Calibration Setup ........................................ 7

Section 5 - Specifications ...............................9

Table of

Contents

FP7002/FP7002A Flow/Temperature Transmitter

Introduction/Safety

Your FP7002/FP7002A has been designed for ease of use and flexibility.

It is important that you read this user’s manual completely and follow

all safety precautions before operating your unit.

Precautions

1. FOLLOW ALL SAFETY PRECAUTIONS AND OPERATING

INSTRUCTIONS OUTLINED IN THIS MANUAL.

3. ADD ADDITIONAL SAFEGUARDS TO YOUR SYSTEM IN

CRITICAL APPLICATIONS WHERE DAMAGE OR INJURY

MAY RESULT FROM SENSOR FAILURE.

5. DO NOT OPERATE IN FLAMMABLE OR EXPLOSIVE

ENVIRONMENTS.

6. DO NOT USE IN HUMAN MEDICAL OR NUCLEAR

APPLICATIONS.

7. NEVER OPERATE WITH A POWER SOURCE OTHER THAN

WHAT IS SPECIFIED IN THIS MANUAL.

8. REMOVE AND/OR DISCONNECT POWER SOURCE BEFORE

ATTEMPTING INSTALLATION OR MAINTENANCE.

9. ALWAYS OPERATE YOUR UNIT WITH THE SHIELD WIRE

CONNECTED TO EARTH GROUND.

10. INSTALLATION AND WIRING SHOULD BE DONE BY

TRAINED PROFESSIONALS ONLY.

NOTE

There are no user serviceable parts inside your unit.

Attempting to open, repair or service your unit may void

your warranty.

FP7002/FP7002A Flow/Temperature Transmitter

Section 1 - General Description

The FP7002 flow/temperature transmitter is ideal for monitoring of

typical industrial water flows and temperature, from hard-to-handle

corrosive aqueous solutions to high purity fluids. The FP7002 uses a

paddlewheel-like rotor whose motion is converted into a pulse output.

This pulse output is converted to a 4 - 20 mA (or 1 - 5 Vdc) analog

output by the built-in signal conditioner. A solid state temperature

sensor built into the sensor body provides a separate 4 - 20 mA (or

1 - 5 Vdc) analog output directly proportional to changes in fluid

temperature. These independent analog outputs can be run long

distances to a panel meter, controller or computer.

A complete flow measurement system consists of the flow sensor/

transmitter, the installation fitting and a readout device. The FP7002

has polypropylene, 316SS, and FKM wetted parts. The schedule 40 PVC

tee fittings are supplied with a PVC locking nut, and the galvanized

iron tee fittings are supplied with a brass locking nut to provide a

secure metal to-metal mounting to the threaded brass insert.

Section 2 - Installation

2.1 Unpacking

Remove the Packing List and verify that you have received all

equipment. If you have any questions about the shipment, please call

the OMEGA Customer Service Department.

When you receive the shipment, inspect the container and equipment

for any signs of damage. Note any evidence of rough handling in

transit. Immediately report any damage to the shipping agent.

NOTE

The carrier will not honor any claims unless all shipping

material is saved for their examination. After examining

and removing contents, save packing material and carton

in the event that reshipment is necessary.

2.2 Important Considerations Before Installation

CAUTION

THE FP7002 PADDLEWHEEL FLOW TRANSMITTER IS NOT

EXPLOSION-PROOF, NOR IS IT INTRINSICALLY SAFE. IT

IS NOT TO BE USED FOR FLAMMABLE OR HAZARDOUS

LIQUIDS, NOR CAN IT BE USED IN HAZARDOUS AREAS.

The FP7002 is intended for use with water and other low viscosity

liquids ONLY; it can NOT be used with oils and other viscous

FP7002/FP7002A Flow/Temperature Transmitter 1

materials. It can be used with non-flammable, non-hazardous liquids

up to 5 centipoise viscosity, but field calibration is recommended for

accurate measurements.

It is important to note that most process water contains dissolved

minerals. If the flowsensor is repeatedly exposed to process water and

then the line is allowed to dry, these dissolved minerals will deposit

onto the FP7002 and will inhibit the low flowrate operation of the

sensor. If this occurs, cleaning of the sensor is recommended.

CAUTION

WATER HAMMER AND SURGES CAN BE DAMAGING TO

ANY FLOWMETER AND MUST ALWAYS BE AVOIDED.

WATER HAMMER OCCURS WHEN A LIQUID FLOW IS

SUDDENLY STOPPED AS WITH QUICK CLOSING AND

SOLENOID OPERATED VALVES. SURGES OCCUR WHEN

FLOW IS SUDDENLY BEGUN, AS WHEN A PUMP IS

TURNED ON AT FULL POWER OR A VALVE IS QUICKLY

OPENED.

LIQUID SURGES ARE PARTICULARLY DAMAGING TO

FLOWMETERS IF THE PIPE IS ORIGINALLY EMPTY. TO

AVOID DAMAGING SURGES, FLUID LINES SHOULD

REMAIN FULL (IF POSSIBLE) AND PUMPS SHOULD

BE BROUGHT UP TO POWER AND VALVES OPENED

SLOWLY. IN ADDITION, TO AVOID BOTH WATER

HAMMER AND SURGES, A SURGE CHAMBER SHOULD

BE INSTALLED.

2.3 Flowmeter Installation

The FP7002 can be mounted in vertical or horizontal pipe runs;

however, the pipe must be full of liquid for proper readings. Thus, the

sensor should not be mounted in vertical pipe where the liquid flows

down, since the pipe may not always be full in this situation. Refer to

Figures 2-1 and 2-2.

FP7002/FP7002A Flow/Temperature Transmitter

FP7002/FP7002A Flow/Temperature Transmitter 2

FLOW

Figure 2-1. Horizontal Mounting Position

FLOW

Figure 2-2. Vertical Mounting Position

FP7002/FP7002A Flow/Temperature Transmitter

The FP7002 should not be mounted at the bottom of the pipe (the 6

o’clock position) because this is where sediment in the liquid will tend

to accumulate. The best mounting location is at or near the 12 o’clock

position, so long as bubbles are not present in the liquid. The 3 o’clock

and 9 o’clock positions are also acceptable. In an upward flowing

vertical pipe, the flowsensor can be mounted anywhere around the

pipe.

As with many flowmeters, the FP7002 requires a fully developed

flow profile in order to provide accurate readings. To insure this, a

length of straight pipe run before and after the flowmeter is required.

The amount of upstream straight pipe run that is required depends

upon the type of obstruction which is immediately upstream of the

flowsensor. See Table 2-1 for specific requirements. Downstream of the

flowsensor, in all situations, only 5 diameters of straight pipe run is

required, regardless of the downstream obstruction.

Table 2-1

Concentric reducer 15 pipe diameters

One elbow 20 pipe diameters

2 elbows, in same plane 25 pipe diameters

2 elbows, in two planes, 40 pipe diameters

or one expansion

Valves, pumps*, same plane at least 50 pipe diameters, prefer sensor

mounted upstream

*Oscillating or reciprocating pumps, which produce flow and pressure

pulses in the flowstream, are not recommended for use with the FP7002

flowsensor.

NOTE

If you do not have the proper amount of straight pipe

run available at your desired installation location, it is

recommended to use flow straighteners to decrease the

required straight run.

The paddlewheel must be aligned with the fluid flow; the installation

fitting is supplied with an alignment tab which mates with a flat on

the base of the paddlewheel sensor to insure proper sensor alignment.

When using the PVC installation fitting, it is critical that the cap of the

sensor is threaded onto the mating fitting HAND TIGHT ONLY; use

of pipe wrenches, etc. on the plastic cap can lead to damage to the cap

and/or the installation fitting.

UPSTREAM

STRAIGHT PIPE RUN REQUIRED

OBSTRUCTION

UPSTREAM OF PADDLEWHEEL SENSOR

FP7002/FP7002A Flow/Temperature Transmitter 2

The FP7002 has magnets installed in the rotating paddles; these

magnets will tend to attract rust from the flowing fluid. Thus, it is

NOT recommended to install the FP7002 in pipes which under typical

conditions contain rust, such as in cast iron, black iron, carbon steel

and other iron pipes (galvanized pipe has been treated to resist rust). In

situations where rust can not be avoided, it is recommended to install a

fine magnetic filter at least 50 pipe diameters upstream from the FP7002

and to periodically shut down the line and remove the sensor from the

installation fitting for cleaning.

2.4 Electrical Connections

CAUTION

All electrical connections and wiring should be performed

by suitably trained personnel only.

NOTE

To insure proper hook-up to your indicating device, the

paddles of the FP7002 can be spun in the open air by

blowing onto them before the sensor is installed into the

installation fitting.

This is particularly important where the pipeline can not

be conveniently shut down and the sensor removed after

installation.

Figure 2-3. Basic Wiring Diagram

5432

54 32

18 Vdc

PWR

–

200 GPM

23.0 C

PANEL METER

TB1 TB4

10 K RESISTOR

TB6 TB3

FP7002/FP7002A Flow/Temperature Transmitter

Section 3 - Maintenance

Except for intermittent removal of the sensor from the flow line for

cleaning, there is no routine maintenance for the FP7002.

Section 4 - Calibration

4.1 Flow Calibration

Equipment Required:

12-18 Vdc Regulated Power Supply

Frequency Generator/Calibrator (such as OMEGA Model: CL123)

Multimeter (such as OMEGA Model: HHM290)

Small jeweler’s type common blade screwdriver

Calibration Procedure:

1. Unscrew and remove the protection head cover.

2. Make wiring connections to the transmitter as shown on page 7.

3. Apply power and allow the unit to warm up for 10 minutes.

4. Determine the maximum volumetric flow rate expected by the

application.

For our example we will use “GPM”. This will be “GPM Max”

5. From the table on page 8, determine the proper “K-Factor” for the

model fitting you will be using.

6. Determine your full scale calibration frequency using this formula.

This will be “F Max”.

F Max = K-Factor x GPM Max

Example: Using a Model FP7015 Tee Fitting with a K-Factor of 29.46

and a GPM Max of 125.

29.46 x 125 GPM = 61.38 for your F Max

7. Set your frequency generator for an output of 0 Hz. Adjust the zero

potentiometer (P1) for a 4.00 mA output.

8. Set your frequency generator for the “F Max” you calculated above.

Adjust the span potentiometer (P2) for a 20.00 mA output.

9. Set your frequency generator for one half the “F Max” you calculated

above. You should have an output reading of 12.00 mA +/- 0.16 mA.

If not, repeat steps 7 & 8.

10. Re-install 10 k resistor across terminals 5 and 6 and re-install white

wire to terminal 5.

11. Calibration complete.

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