Graco 308287 Fiche technique

308–287

Rev. C

Supersedes Rev. B

and PCN C

First

choice when

quality counts.



01847

INSTRUCTIONS-PARTS

LIST

INSTRUCTIONS

This

manual contains important

warnings and information.

READ AND KEEP FOR REFERENCE.

PRO

Pulse

Electronic Volumetric Flow Meter

For use with Plural Component Precision Mixing Systems

This meter is designed to be used in a Class I, Group D hazardous environment

2800 psi (19.6 MPa, 196 bar) Maximum Working Fluid Pressure

50 psi (350 kPa, 3.5 bar) Maximum Working AirPressure

Part No. 235–402, Series A

Flow

Meter with 0.1 cc per tooth fluid volume flow

Model 235–403, Series A

Flow

Meter with 0.4 cc per tooth fluid volume flow

NOTE:

See the

Accessories

section to order Fiber

Optic Cables and to order the Fluid Manifold.

U.S.

and Foreign Patents Pending

GRACO INC. P.O. BOX 1441

MINNEAPOLIS, MN

55440–1441

COPYRIGHT

1993, GRACO INC.

Graco

Inc. is registered to I.S. EN ISO 9001

308–287

Table

of Contents

Warnings 2.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation 4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation 6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance 7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service 9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts 11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dimensions 15

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical

Data

15.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warranty 16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Graco

Phone Number

16.

. . . . . . . . . . . . . . . . . . . . . . . . .

Symbols

Warning Symbol

WARNING

This

symbol alerts you to the possibility of serious

injury or death if you do not follow the instructions.

Caution Symbol

CAUTION

This

symbol alerts you to the possibility of damage to

or destruction of equipment if you do not follow the

corresponding instructions.

WARNING

INJECTION HAZARD

Spray

from hose leaks or ruptured components can inject fluid into your body and cause an extremely

serious injury

, including the need for amputation. Splashing fluid in the eyes or on the skin can also

cause a serious injury



Fluid injected into the skin might look like just a cut, but

it is a serious injury

Get immediate medi

cal attention.



Do not stop or deflect fluid leaks with your hand, body

, glove, or rag.



Follow the

Pressure Relief Procedure

on page 6 whenever you: are instructed to relieve pres

sure; stop operation, or clean, check, or service the equipment; and install or clean the spray tip.

T

ighten all the fluid connections before operating the equipment.



Check the hoses, tubes, and couplings daily

. Replace worn, damaged, or loose parts immediately

Permanently coupled hoses cannot be repaired; replace the entire hose.

FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD

This

equipment must only be installed by trained and qualified personnel.

The meter’

s electrical chassis must be properly grounded. See

Check the Electrical Grounding

on page 5.



Do not allow water or other liquids to spill on the electrical chassis.



Do not immerse the chassis in fluids.



The air line to the electrical chassis must be turned OFF and the pressure relieved before servicing

or flushing the meter

3308–287

WARNING

INSTRUCTIONS

EQUIPMENT MISUSE HAZARD

Equipment

misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result

in a serious injury

This equipment is for professional use only

Read all the instruction manuals, tags, and labels before operating the equipment.

Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco

distributor.

Do not alter or modify this equipment. Use only genuine Graco parts and accessories.

Check the equipment daily

. Repair or replace worn or damaged parts immediately

Do not exceed the maximum working pressure of the lowest rated system component. This equip

ment has a

2800 psi (19.6 MPa, 196 bar) maximum working pressure.

Use fluids that are compatible with the equipment wetted parts. See the

echnical Data

section of

all the equipment manuals. Read the fluid manufacturer

’

s warnings.

Route the hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not

expose Graco hoses to temperatures above 180

_F (82_

C) or below –40

_F (–40_C).

Comply with all applicable local, state, and national fire, electrical, and other safety regulations.

4308–287

Installation

CD E G

1CDE

KEY

AAir

Supply Line

BBleed-T

ype Air Supply Line

Shut-of

f V

alve

(required)

Air Line Filter

Air Line Lubricator

Air Line Regulator

FPump

Fiber Optic Cable

Flow Meter

Fluid Supply Line

Fluid Supply

Main Power Switch

MPendant

Pump Grounding Wire

(required)

Fluid Manifold

15V 60 Hz Electrical Supply

SController

NON-HAZARDOUS

AREA

HAZARDOUS AREA

01848

The PRO Pulse V

olumetric Flow Meter is designed to

detect the pulses induced on a magnetic sensor each

time a gear tooth passes by the sensor

. A specific

volume of fluid flows through the meter with each gear

tooth rotation. See the front cover for the specific fluid

volume flow of your meter

Installing the System

WARNING

help reduce the risk of serious injury

, including

splashing in the eyes or on the skin, the bleed-type

air shut-of

f valve (B

) must be installed in the

system to relieve air trapped between this valve

and the pump after the air is shut of

f. T

rapped air

can cause the pump to cycle unexpectedly

. Locate

the valve close to the pump.

The T

ypical Installation shown above is only a guide

for selecting and installing the flow meter

. For assis

tance in designing a particular type and size system for

your application, contact your Graco representative.

Install the air line accessories in the order shown in the

ypical Installation, using adapters as necessary

Connect the air line to the Flow Meter by pressing the

front ferrule (D) and back ferrule (C) onto the tubing

(A). See Fig. 1. Press the assembly into the fitting (E)

and tighten the nut (A). Connect the fiber optic cables

by pressing the front ferrule (L) and back ferrule (K)

onto the cable (G).

The maximum fiver optic cable length is 100 ft (30.5

m) with two splices. See

Accessories

on page 14 to

order cables.

5308–287

Installation

Fig. 1

KEY

ATubing,

1/4” OD

Nut (nylon)

Ferrule, back (nylon)

Ferrule, front (nylon)

Air Inlet Fitting

Electrical Chassis

Fiber Optic Cables

Gear Housing Assy

Nut (aluminum)

Ferrule, back (aluminum)

Ferrule, front (aluminum)

CDE

Flow

Indicator

Light

(Green)

Power Indicator

Light

(Yellow)

Fiber

Optic

Sender

Fiber

Optic

Sender

01849

Check the Electrical Grounding

WARNING

Proper

electrical grounding of your system is

essential when used with flammable or combustible

liquids. For you safety

, read the warning section

FIRE, EXPLOSION, AND ELECTRIC SHOCK

HAZARD

on page 2.

Have a qualified electrician check the electrical

grounding continuity between the flow meter electrical

chassis and a true earth ground as shown in Fig. 2. If

the resistance is greater than 25 ohms, check the

mounting or add a ground strap to the chassis.

Fig. 2

True Earth Ground

Digital

Voltage

Meter

Electrical

Chassis

01850

6308–287

Operation

Pressure Relief Procedure

WARNING

INJECTION

HAZARD

Fluid under high pressure can be in

jected through the skin and cause

serious injury

. T

o reduce the risk of an

injury from injection, splashing fluid, or moving

parts, follow the

Pressure Relief Procedure

whenever you:



are instructed to relieve the pressure,



stop operating,



or check or service any of the system equip

ment.

1. T

urn of

f the air supply to the meter

Allow air to exhaust out of the exhaust air port.

3. T

urn of

f the fluid supply to the meter

Shut of

f all electrical power to the fluid system or

air system.

Follow the Pressure Relief Procedure for your fluid

system dispensing device.

System Operating Checklist

Check

the following list daily

, before starting to operate

the system, to help ensure you of safe, ef

ficient opera

tion.



Be sure all operators are properly trained and

qualified to safely operate your system.



Be sure all operators are trained how to properly

and completely relieve system pressure according

to the

Pressure Relief Procedure

, at left.



Be sure the system is thoroughly grounded. See

FIRE, EXPLOSION, AND ELECTRIC SHOCK

HAZARD

, page 2, and

Check the Electrical

Grounding

, page 5.



Be sure the operator and all persons entering the

installation site are properly grounded by wearing

shoes with conductive soles or personal grounding

straps.



Be sure ventilation fans are operating properly

Operation

Operate the flow meter between 20–50 psi (140–350

kPa, 1.4–3.5 bar) air inlet pressure. The yellow flow

meter indicator light will come on when the proper air

pressure is supplied. The green flow meter indicator

light will blink on and of

f when the fluid is flowing.

7308–287

Maintenance

CAUTION

Do not immerse the meter in solvent. Solvent could

damage the meter

’

s electrical components.

Clean the fluid and air line filters daily

Clean the outside of the meter with a soft cloth

dampened in a compatible solvent as needed.

Flush the fluid supply line and meter fluid reservoir

daily with a compatible solvent as instructed at

right.

Flushing the Meter

WARNING

reduce the risk of serious injury whenever you

are instructed to relieve pressure, always follow the

Pressure Relief Procedure

on page 6.

Relieve the pressure.

Connect the fluid line to the solvent supply unit.

Flush the meter until it is clean.

Relieve the pressure

, then disconnect the fluid

line from the solvent supply unit.

Reconnect the fluid line to the fluid (paint) supply

6. T

urn on the fluid supply

Operate until the meter and fluid line are free of

solvent.

8308–287

Troubleshooting

WARNING

Installing and servicing this equipment requires

access to parts that may cause electric shock or

other serious injury if the work is not performed

properly

. Do not install or service this equipment

unless you are trained and qualified.

o reduce the risk of serious injury whenever you

are instructed to relieve pressure, always follow the

Pressure Relief Procedure

on page 6.

Before servicing this equipment always make sure to

relieve the pressure

Problem Cause Solution

ellow LED is of

f; no power to

Insuf

ficient air supply

Adjust air regulator

ellow LED is of

f; no power to

flow meter

urbine alternator not working Check for dirt or moisture in turbine.

Faulty turbine alternator

Be sure plug is in place on back of

turbine alternator housing. Remove

and test alternator

Excess moisture in air lines

Use filter-moisture separator

urbine not connected to PC board

Connect 3-pin connector to square

pins.

op PC board not connected to bot

tom PC board

ighten bolts to compress gasket to

0.040” (1.02 mm)

Alternator shorted to chassis Check that insulating pad (2a) is in

place. Replace pad if necessary

Meter gasket (5) is damaged

Replace gasket.

Green LED is of

Dried paint/fluid in gear track (gears

are not moving)

Flush fluid section of meter as

instructed in

Maintenance

on page

7, or disassemble and clean the

gear housing assembly

orn gears

Replace faulty gears.

Electronic failure

Replace meter

9308–287

Service

WARNING

Installing and servicing this equipment requires

access to parts that may cause electric shock or

other serious injury if the work is not performed

properly

. Do not install or service this equipment

unless you are trained and qualified.

o reduce the risk of serious injury whenever you

are instructed to relieve pressure, always follow the

Pressure Relief Procedure

on page 6.

NOTE:

Check all possible remedies in the

Trouble-

shooting

section before disassembling the meter

Relieve the pressure

and flush the meter as

described on page 7.

Disconnect the fiber optic cable(s) (G) from the

electronic module (B). See Fig. 3.

Disconnect the air hose fitting and remove the air

hose from the motor

. Disconnect both fluid hose

fittings and remove the fluid hose from the meter

Remove the four screws (A) to separate the gear

housing (F) from the manifold.

CAUTION

Never remove the electronic module (B) from the top

gear housing (E). The electronic module is calibrated

to the gear housing assembly and will not function

properly if removed.

Fig. 3

Torque

to 7.5

ft-lb (10 N

m)

01851

KEY

A Screw

Electronic Module

C O-Ring

D Manifold

op Gear Housing

Gear Housing Assy

Fiber Optic Cable

Replacing the Turbine Alternator

1. Remove

the top chassis (3) from the bottom

chassis (2). See Fig. 4.

Disconnect the 3-pin connector (J) from the square

pins (H).

Carefully pull the alternator (4) away from the top

housing.

Using an ohmmeter

, test the coil in the turbine

alternator

. Measure the resistance between the

two outer terminals of the 3-pin connector (J). The

resistance should be 3–5 ohms. If the reading

varies from this value, replace the alternator (4).

Lubricate the alternator o-ring (4a) seal with petro

leum jelly

Insert the alternator (4) into the top chassis (3).

Connect the 3-pin connector (J) to the 3 square

pins (H) in the top chassis (3).

Check to see that the gasket (5) is not damaged. If

damaged, replace the gasket.

Snap the top and bottom chassis together

10.

Install and tighten the chassis screws (9) to 40

in-lbs (4.52 N

m).

Fig. 4

0180A

KEY

H Pins

J 3-pin

Connector

Bottom Chassis

op Chassis

4 Alternator

Alternator O-Ring

5 Gasket

9 Chassis Screws

orque to

40 in-lb

(4.52 N

m)

10 308–287

Service

Replacing Worn Bearings

repair kit is available to service the bearings. An

asterisk after the description or reference letter indi

cates a part included with the repair kit. See page 1

to order the proper kit for your meter model.

CAUTION

This is a close-tolerance device. It will be damaged if

forced apart during disassembly

Loosen the four screws (N). See Fig. 5. Leave

about two threads connected.

The two halves of the gear housing are pegged

together and will be dif

ficult to separate. The pegs

are part of the top gear housing (E).

Hold the housing and tap the screws one at a time

in a consistent sequence and eventually the two

halves will come apart.

Before removing the gears (L), note which peg the

gear is being removed from. The gears must be

installed on the same peg they were removed

from.

CAUTION

Always reinstall the gears on the peg they were

removed from to ensure proper calibration with the

electronic module.

Remove the gears (L) and washers (K).

Support a gear on its sides and position the bear

ing tool (T*) as shown in Fig. 6. Make sure the

gear has suf

ficient clearance in the center to press

out the bearings and spacers.

Press the bearing tool with an arbor press or tap it

with a soft hammer until the bearings and spacers

are removed. Repeat with the other gear

To install th

e k

it part

s a

nd assemble the gea

r h

ousing:

Place a gear on a flat surface. Position the bear

ings (P*), spacers (R* and S*) and the bearing tool

(T*) as shown in Fig. 7.

Press the bearing tool with the arbor press or tap it

with a soft hammer until bearings and spacers are

installed into the gear

. Repeat with the other gear

Install the o-ring (M*), washers (K*), and gear

assemblies (L*). Be sure to install the gears on

their proper pegs. See Fig. 5.

Press the gear housings together and secure them

with the four screws (N). T

orque the screws to 7.5

ft-lbs (10 N

m).

Install the meter back onto the adapter plate.

When installing the screws (A), replace the meter

’s

two o-rings (C*) with the o-rings from the kit.

orque screws to 7.5 ft-lbs (10 N



m). See Fig. 3.

NOTE:

Kit 223–276 has two sets of o-rings. Use the

o-rings that match the o-rings you are replacing and

discard the others.

CAUTION

Never immerse a meter in solvent for cleaning. Doing

so will damage the electronics.

Fig. 5

Torque

7.5 ft-lb

(10 N

m)

01852A

KEY

op Gear Housing

K Washer

Gear Assembly

M O-Ring

N Screw

Replace

whenever

disassembled

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