RCm Flo-Gage 7000 Series Installation and operating instructions

INSTALLATION, OPERATION AND MAINTENANCE
Threaded and Wafer Style Flowmeters
Wafer Style Flowmeter
Figure 1
SP.GR.=1.0
GPM
1
50
200
250300
350
1
00400
Table of Contents Page
1.1.
1.1.
1. Principle of OperationPrinciple of Operation
Principle of OperationPrinciple of Operation
Principle of Operation............................................................................
............................................................................
...................................... 22
22
2
2.2.
2.2.
2. Installation PlanningInstallation Planning
Installation PlanningInstallation Planning
Installation Planning ................................................................................
................................................................................
........................................ 22
22
2
3.3.
3.3.
3. InstallationInstallation
InstallationInstallation
Installation ................................................................................................................
................................................................................................................
........................................................ 33
33
3
3.1 SafetyConsiderations ........................................ 3
3.2 Changing the Dial Orientation ............................ 3
3.3 Changing from Horizontal to Vertical .................. 3
3.4 Threaded bodies ................................................ 3
3.5 Waferstylebodies .............................................. 3
4.4.
4.4.
4. Operation and MaintenanceOperation and Maintenance
Operation and MaintenanceOperation and Maintenance
Operation and Maintenance ........................................................
........................................................
............................ 44
44
4
4.1 PreventiveMaintenance ..................................... 4
4.2 Checking Zero .................................................... 4
4.3 Checking the Pointer Preload ............................. 4
4.4 Coarse Zero Adjustment .................................... 4
4.5 Fine Zero Adjustment ......................................... 5
4.6 Flow Calibration.................................................. 5
4.7 Cleaning of Pressure Ports................................. 6
4.8 Adjustment of ReedSwitches..............................6
5.5.
5.5.
5. TT
TT
Troubleshootingroubleshooting
roubleshootingroubleshooting
roubleshooting ..............................................................................................
..............................................................................................
............................................... 66
66
6
5.1 Pointer Fluctuations ............................................ 6
5.2 Zero Shift ............................................................ 7
5.3 Sluggish Meter Response .................................. 7
6.6.
6.6.
6. Correction FCorrection F
Correction FCorrection F
Correction Factorsactors
actorsactors
actors ......................................................................................
......................................................................................
........................................... 77
77
7
6.1 Liquid Service ..................................................... 7
6.2 Compressed Gas Service .................................. 7
7.7.
7.7.
7. Cutaway viewCutaway view
Cutaway viewCutaway view
Cutaway view ........................................................................................................
........................................................................................................
.................................................... 88
88
8
Figures
Figure 1 Waferstyleflowmeter .......................... 1
Figure 2 Installationconditions.......................... 2
Figure 3 O-ringinstallation ................................ 3
Figure 4 Zero referencepoint............................ 4
Figure 5 Pointer preload.................................... 4
Figure 6 Cam nut and stop nut.......................... 5
Figure 7 Camfolloweradjustment..................... 6
Figure 8 Reedswitchadjustment...................... 6
Figure 9 Cutawayview ...................................... 8

Selectasitewhich isconvenientfor viewing andwhichprovides service accesstothe front
andrear ofthe flowmeter.Note thatthe dialcan be ordered in anyorientation at90 degree
incrementsand can beeasily reorientedin thefield.See “Changingthe DialOrientation” in
the installation section. The site selected should provide at least 10 pipe diameters of
straight meter size pipe between the meter inlet and any upstream fitting such as elbow,
teeor valve. Thereare no special piping requirementsfor downstreamconnections tothe
meter.
Note that the meters (except those with sanitary connections, which are calibrated for
tubing) are calibrated based on schedule 40 pipe connections. Tubing or hoses do not
have the same ID as pipe and should be transitioned to pipe at least 10 diameters up-
stream of the meter to achieve rated accuracy.
Avoidplacing themeter where it will besubjected towater hammerand mount themeter
rigidlyto minimizeshock orvibration.
Metersinstalledoutdoorsorexposedtosplashingliquidsshouldbeorderedwithagasketed
case.
Protect from freezing liquids.
1.
Principle
of
Operation
Installation
Planning
and Site
Selection
RCM Series 7000 and Series 8000 Flo-Gages measure flow rate by sensing the pressure
differentialcreated acrossthe flownozzle whichis machined into the body of theflowme-
ter.A pair of matched, opposedbellowssensethedifferentialpressureanddriveamechani-
cal linkage to indicate flow rate directly on the dial. (When fitted with options RW2, the
bellowsandmechanical linkageare replacedwitha solidstate differential pressuresensor
and digital readout.)
2.
Installation Conditions
Figure 2
FLOW
GPM
10d
d
Page 2

3.3.1 Safety Considerations
Do not exceed the pressure and temperature limits marked on the nameplate of theDo not exceed the pressure and temperature limits marked on the nameplate of the
Do not exceed the pressure and temperature limits marked on the nameplate of theDo not exceed the pressure and temperature limits marked on the nameplate of the
Do not exceed the pressure and temperature limits marked on the nameplate of the
metermeter
metermeter
meter. Although each meter is pressure tested to 150% of nameplate rating. Although each meter is pressure tested to 150% of nameplate rating
. Although each meter is pressure tested to 150% of nameplate rating. Although each meter is pressure tested to 150% of nameplate rating
. Although each meter is pressure tested to 150% of nameplate rating, over, over
, over, over
, over--
--
-
pressure may cause injurypressure may cause injury
pressure may cause injurypressure may cause injury
pressure may cause injury, leaking or meter damage., leaking or meter damage.
, leaking or meter damage., leaking or meter damage.
, leaking or meter damage.
Temperature ratings are determined by the effects on the mechanical linkage, elastomer
seals and electronics (if electronics are fitted). If temperature ratings are exceeded, the
metermay be damagedor fail.Contact the factoryfor applicationassistance for expanded
temperatureoperation.
3.2 Changing the Dial Orientation
Notethe flowdirection arrow on the body. Ifnecessary, changethe dial facingdirection by
removingthefour screwsholding thebodyto thehousing.Donot remove thetwo screws
holdingthehousingtothecellblockassembly.
Position the housing atany 90degree position.Replacethe fourscrews takingcare notto
pinch the o-ring seals.
O-Ring Installation
Figure 3
3.3 Changing from Horizontal to Vertical or Vertical to Horizontal
Remove thelens byrotating counter-clock wiseby hand. Donotremovethepointer.Move
thedial forwardby pryingwith a small knife atthe 12:00o'clock position.Rotatethe dialto
the desired viewing position and push the dial back into position. There are 4 locating
indents on the dial edge to position the dial at 90 degree increments.
Usingasmall screwdriverblade toliftthe endof the retainerring upandout ofthe housing
recess, remove the retainer ring and the dial crystal. Do not remove the pointer. Remove
thetwoscrewsholding thedialandrotate the dialtothedesired viewingposition.
Reinstallthescrews toholdthe dialinposition. Itwillbe necessary toshorten one screwto
approximately 1/8" (3 mm) by cutting with scissors or a knife. Use the short screw in the
positionawayfrom themeter body.
Rezero the meter using the FINE ADJUSTMENT procedure.
3.4 Threaded Bodies
Make up thread joints using a suitable thread sealant. Be sure threads are clean and free
of burrs before making up joints. Apply wrench torque only to the meter body. DO NODO NO
DO NODO NO
DO NOTT
TT
T
exertany wrenchingforce to the meter housing.
3.5 Wafer Style Bodies
Installthe meter betweenmating flanges. Takecareto center thegaskets sothat they do
not protrude at all into the pipeline. Gasket protrusion will cause significant calibration
errors.
Installation
O-Rings
Page 3
Polycarbonate
Housing
Aluminum
Housing
Either Housing

4.1 Preventative Maintenance
The meter does not require routine lubrication or service of any kind. Keep the interior of
meter housing clean and free of dust, moisture, oils or corrosive materials. Protect the
meter from dripping or splashing corrosives or solvents which may attack meter exterior
and eventually damage the internal mechanism.
4.2 Checking Zero
Water hammer or pressure surges can displace the bellows and cause the zero to shift. If
the pointer does not return to the stop pin when flow through the meter is zero, or if the
pointerdoes notmove awayfrom the stop pin at12-15% offull scaleflow, thencheck the
zeroadjustmentas follows:
• Stopflow.
• Remove the lens.
• Observethe positiontakenbythe pointer. When properlyadjusted, the pointershould
point to the zero reference point as shown in Figure 4.
• If the pointer is positioned within 1/2" (12 mm) of stop pin, then follow FINE ADJUST-
MENT procedure to rezero pointer.
• If the pointer is positioned more than 1/2" (12 mm) from the stop pin, then follow the
COARSE ADJUSTMENT procedure.
Zero Reference Point Pointer preload
Figure 4 Figure 5
4.3 Checking the Pointer Preload
If the fine adjustment has been performed repeatedly, the pointer return spring preload
shouldbe checked. Manuallyrotate thepointer CCW towardfull scale.The pointershould
stopatfullscale. Ifthepointer goes beyondfullscale, adjust withthecam nut followingthe
COARSE ADJUSTMENT procedure. Otherwise, go to the FINE ADJUSTMENT proce-
dure.
4.4 Coarse Zero Adjustment
Ifnecessary torestore spring preload,place asmall screwdriverin theslotted pointer hub.
Gripthepointer closetothe hubonboth sidesofthe huband rotate thehub approximately
one-quarterturnclockwisewithrespect to the pointer. Checkpreloadbyrotatingthepointer
CCWtoward full scale.When properly adjusted, the pointershould stop atfull scale.
4.
Operation
and
Maintenance
Zero Mark
.5 4.0
Zero Reference Point
Pointer
Dial
.02"-.05"
Page 4

Release the pointer. Using the cam nut, adjust the lever so that the pointer points to the
zeroreference point.
Check the position of the stop nut. Applying force to the stop nut, manually move the
centershaft to theright (asseen from therear) andmakecertainthat thestop nut contacts
the cell block when the pointer stops. If necessary, adjust the stop nut to stop the pointer
nearthe 6o’clock position. The factory setpoint isthe “U” in “USA”.
Cam nut and stop nut
Figure 6
IMPORTANT. The stop nut must stop the center shaft movement before the bellows
hit the cell cap. If the bellows hit the cell cap, the bellows or the cap can be damaged
causing leaking or meter errors.
Adjustthecam nutuntil the pointerpoints atthezero referencepoint.Gently tapthe meter
toovercome residualfrictionwhile makingthe adjustment.
Test for freedom of pointer movement by rotating the pointer approximately 30 degrees
and releasing. Pointer should return quickly to the zero reference. Clean and reinstall the
lens.
4.5 Fine Zero Adjustment
Note: If fitted with transmitter model W, X, Y or Z or with reed switches, do not use this
procedure.Do all ajustmentswith thecoarse zeroadjustement.Adjustment ofthe finezero
usingthis method willrequire recalibrationof reed switchesor transmitter.
Grip the pointer close to the hub on both sides of the hub and rotate the hub with respect
to the pointer. The pointer should aim directly at the “zero reference point” printed on the
dial as shown in figure 4.
Gently tap the meter to overcome residual friction while making the adjustment. Test for
freedom of pointer movement by rotating the pointer approximately 30 degrees and re-
leasing. Pointer should return quickly to zero reference. Clean and reinstall lens.
4.6 Flow Calibration
The orifice has been factory adjusted to provide the proper differential pressure for accu-
ratemeteroperation.Metersarefactory calibratedwithwaterpriortoshipment.NIST trace-
able certifications are available when ordered prior to shipment or may be obtained by
returning the meter for recalibration. Field calibration may be verified using the following
procedure:
Checkthezero adjustmentofthe pointer.Cyclethe flowratefrom zerotofull scalethreeor
fourtimes andobserve the pointermotion. Pointershould return tozero smoothly.
4.
(Continued)
CAM NUT STOP NUT CENTER SHAFT
CELL CAP
CELL BLOCK
Page 5
Operation
and
Maintenance

Page 6
Establisha known flowrate throughthe meter correspondingto approximately90% of full
scaleand observethe meter indication. Move thecam followerup todecrease thepointer
indicationor downto increasethe pointerindication.
To move the cam follower up, rest a screwdriver on the cell block with the blade between
the cell block and the center shaft. Pry gently up on the cam follower. To move the cam
follower down, place a screwdriver on the top of the cam follower. With the blade resting
against the case press gently down. Take care not to put excessive forward pressure on
thecamfollowertoprevent the"C"cliponthe pivot shaftfromcomingoff.Rezerothe meter
usingthe camnut.
Cam Follower Adjustment
Figure 7
Check meter indication at 50% of full scale. Meter should indicate actual flow rate within
3%of fullscale. Ifmeter doesnot indicateactual flow,consultfactory.
4.7 Cleaning of Pressure Ports
Remove the meter housing from the body by removing 4 screws. Remove the pulsation
snubbers from the body by inserting a small wood screw into the hole in the pulsation
snubbersandgently pullthemout. Cleanpassages in bodyand snubbers andreassemble.
Ifyou are unableto cleanwithout furtherdisassembly,themeter shouldbe returned tothe
factoryfor service.
Reassemble the meter housing to the body in the desired viewing position. Take care to
properlyseat the inner and outero-rings beforetightening screws.
4.8 Adjustment of Reed Switches
Check the meter zero and correct if necessary using the coarse or fine zero procedure
before proceeding. Connect continuity tester to N.O. contact. Loosen the switch clamp.
Establish the desired flow rate for switch tripping. Slide switch to left most position.
Range window should show a partial or complete green mark.Slowly slide to right while
monitoring N.O. contact. Switch will close. Continue to slide to right. Switch will open
(false trigger). Continue to slide to right until switch closes again. Adjust by sliding to
right to raise setpoint, left to lower. Tighten clamp. Note: Tiny adjustments may be re-
quired to reach the desired set point.
4.
Operation
and
Mainte-
nance
(Continued)
INCREASE
INDICATION
DECREASE
INDICATION
CAM
FOLLOWER
Reed Switch Adjustment
Figure 8
adjustment clamp screws
terminal strip
set point range windows

5.1 Pointer Fluctuation
Mechanical fluctuation of the pointer is usually a symptom of excessive turbulence in the
pipeline.Thisis frequentlycausedby valvesorfittings installedtooclose tothemeter inlet.
If moving the meter is not practical, snubbers with smaller holes can be installed to in-
crease the mechanical damping of the meter. (Pulsation snubbers are installed standard
on all gas meters and on liquid meters unless ordered with viscosity correction.)
5.2 Zero Shift
The need to frequently rezero the meter is an indication of excessive water hammer. Pip-
ing or operating procedures should be changed to reduce water hammer in order to pro-
longthe lifeof themeter.
5.3 Sluggish Meter Response
Sluggishmeter responsecan becaused byinadequate pointerreturn springpreload orby
clogging of the pressure passages with debris. To check spring preload, see CHECKING
THE POINTER PRELOAD. To clean the pressure passages, see CLEANING OF PRES-
SURE PORTS.
6.1 Liquid Service
Ifthe specificgravity of thefluid beingmetered differs from the valuemarked on the
meter dial, a correction factor, J, must be applied to the meter reading to obtain the
actualflow rate.
Actualflow rate= Jx meterreading
where JSc
Sa
=
Sc= Specific gravityfor whichmeter iscalibrated
Sa= Actual specificgravity offluid beingmetered
Example:
Meter,calibrated for water(specific gravity = 1.0) reads 12.5 GPM for a lubricating oil
withspecific gravityof 0.85.What isthe actual flow rate?
J== =
10
085 11765 1085
.
...
Therefore,actual flow = 1.085 x12.5 =13.56 GPM
6.
Correction
Factors
5.
Trouble–
shooting
Page 7

PRINTED ON RECYCLED PAPER
M1 rev G 0101
where
()
()
()
()
KPa
Pc
Tc
Ta
=+
+
æ
è
çö
ø
÷+
+
æ
è
çö
ø
÷
147
147
460
460
.
.
Pa = Actual gas pressure at entrance to meter, psig.
Pc = Calibrated gas pressure marked on the meter dial, psig.
Ta = Actual gas temperature at meter, °F
Tc = Calibrated gas temperature marked on meter dial, °F
Example:
Meter calibrated for compressed air at 100 °F and 80 psig. reads 100 SCFM at an
actual temperature of 70 °F and pressure of 85 psig. What is the actual flow rate?
()
()
()
()
K=+
+
æ
è
çö
ø
÷+
+
æ
è
çö
ø
÷
85 147
80 147
100 460
70 460
.
.
Therefore,actual flow rate= 1.05 x 100 = 105 SCFM
6.
Correction
Factors
(Continued)
INDICATOR
ASSEMBLY
GEAR
MOVEMENT
HOUSING
PULSATION
SNUBBERS
METER BODY
FLOW
6.2 Compressed Gas Service
Ifthe gaspressure or temperaturevaries fromthe values markedonthe meter dial,then a
correctionfactor, K,must be applied to themeter readingto obtain the actual flowrate.
()()
K
==
105 106 105.. .
Cutaway View From Front
Dial Removed
Figure 9
7.
Cutaway
View