APC AXFA11G user manual Disagreement Between Indication and Actual Flow

Page 108

10. MAINTENANCE

10.3.3 Disagreement Between Indication and Actual Flow

START

Are parameters

NO

 

 

 

set correctly?

 

Set the parameters correctly.

YES

Examine the condition of the fluid in the flowtube, of bubbles, and of grounding.

Was zero

NO

adjustment carried out

 

correctly?

 

YES

 

Is the tube

NO

filled completely with

 

fluid?

 

YES

 

Does the fluid

YES

contain bubbles?

 

NO

 

Is the

NO

flowmeter completely

 

grounded?

 

YES

 

Is the

 

signal cable

NO

terminal treatment

 

complete?

 

YES

 

Does the

NO

conductivity stay within the

 

specified range?

 

YES

 

Is the

YES

fluid likely to contain

 

deposits?

 

NO

 

Confirm that a valve is located immediately upstream of the flowtube (i.e., on the upstream side).

Is a valve

YES

located immediately upstream

 

of the flowtube?

 

NO

Remove the flowtube and examine the insulation resistance.

Signal terminals A-C and B-C:

NO

100 M or more?

 

Excitation terminals EX1-C:

 

1 M or more?

 

YES

 

Examine the operation of the converter using an AM012 calibrator in order to determine whether the fault lies in the converter or in the flowtube.

Execute zero adjustment when the flowtube is filled completely with fluid and when the fluid is not moving.

•Change the mounting position or piping so that the flowtube is

completely filled with fluid.

•Switch to vertical mounting.

Install a defoaming device on the flowtube’s upstream side.

Completely ground the converter and flowtube (Refer to the section on grounding in the relevant user’s manual).

Fully terminate the signal cable using PVC tubing or insulation tape, thus insuring that conductors, inner shields, and outer shields do not make contact with each other or with the case.

Use within the specified conductivity range.

•Remove scales. Especially clean the electrodes and their vincinity.

•Use a soft brush or cloth to perform scale removal, and make sure that the lining is not damaged.

•If any valve located immediately upstream of the flowtube is used in a

half-open condition, the indication may be affected by turbulence in the flow.

• Relocate the valve to the downstream side.

•If the valve must be located on the upstream side, ensure that the minimum distance to the flowmeter is 10 times the flow-tube diameter; alternatively, use the valve fully open.

Dry the tube fully to restore insulation resistance.

Contact a service center.

F1007.EPS

10-6

IM 01E20C01-01E

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Page 107 Page 109
Contents Users ManualAXFA11G Contents Operation VIA Hart Communicator Revision Record Safety and Modification Precautions IntroductionUsing the Magnetic Flowmeter Safely WarrantyGuarantee will not apply in the following cases Combination Remote Flowtubes Handling Precautions Checking Model and SpecificationsAccessories Storage PrecautionsInstallation Installation LocationMounting Surface Mounting Wall MountingInch Pipe Mounting Panel MountingInch pipe Mounting fixture Washer Clamp screw Unit mm approx. inch Panel cutout 203 Mounting fixture 172Wiring Wiring PrecautionsDedicated Signal Cable Axfc CablesWiring Ports Excitation Cable/Power Cable/Output CableUnit mm approx. inch Crimp Terminal On the converter sideWhen there are no particular optional specifications Wiring using waterproof glandsConduit Wiring Plastic glandWiring Connections Terminal ConfigurationRemoving Cover Precautions for Wiring of Power Supply Cables DC Power ConnectionWiring the Remote Flowtube with the AXFA11 Converter Axfc Dedicated signal cable Excitation cableGrounding Protective grounding terminalsConnecting to External Instru- ments To 20 mA DC Current OutputPulse Output Status InputStatus Output / Alarm Output 13 Status Output ConnectionOperating Panel Configuration and Functions Setting switch operationsData display area Content Display itemsReversed-character indication NoneDisplay Unit Setting Methods Display Mode → Setting ModeSetting Mode To Parameter Search Mode Parameter Setting Procedure Setting ModeSetting Example for Selection-Type Data Flow rate units Sub-item Current unit setting Sub-item Parameter Search ModeB21 Base Flow Unit Parameter Sub-itemSetting Example for Numeric-Type Data Flow rate span Setting Mode ConditionMajor Item Parameter Search Mode Setting mode B23 Flow SpanSetting Example for Alphanumeric-Type Data Tag number Setting Mode ConditionSub-item Parameter Search Mode Major item Incorrect settingSearch Mode Selection C Sub-item Major itemModified value Parameter Description Item B Menu B Easy Setup items Item a Menu a Display itemsDefault value Units Description Display unit Name Data rangeIndicated item Item C Menu C Basic Setting items Name Data range Position Default value Units Display unitItem D Menu D Total Setting items Default value Units Display unitName Data range Position Default value Display unit NameItem E Menu E Pulse Setting items Item F Menu F Status Functions Setting itemsItem G Menu G Alarm Setting items ALM-SETTING ALM HYSALM OUT ACT ALM-SIG OverItem H Menu H Display Setting items Item J Menu J Auxiliary Function Setting itemsItem K Menu K Diagnostic Function Setting items Units Display unitItem N Menu N Loop Test Setting items Item P Menu P Parameter Protection itemsMenu B Easy Setup items Data RangeExample When 1000 m3/h is set for B23/C42 Flow Span Unit/P 10-9 FU u Unit/P 10-6 FU Pulse/sDescription Menu C Basic Setting items B41/H11 Display Select2 and B42/H12 DisplayMeter Factor Settings Menu D Total Setting items C47 User Span Select Selection of the useC49 Flow User Span Is set forB22/C41 Base Time UnitTOTAL, and A32 DIF Total when Brain F13Flow Unit Is set forB22/C41 Base TimeMenu E Pulse Setting items Setting for E20 Pulse Active ModeE20 Pulse Active Mode Menu F Status Functions Setting items Setting Function DescriptionSwitch Lower and D24 Ttl Switch Upper G33 Alm-HH/LL to YesNo Function No input function Val UpperMultiple ranges setting Multiple Ranges Setting Automatic multiple ranges switchingStatus Output for Automatic Multiple Ranges Switching 1 Status Output for Automatic Multiple Ranges SwitchingParameter setting sequence For automatic multiple ranges switchingF14 SO1/2 Active Mode F10 SO1 Function F11 SO2 Function2 Multiple Ranges Switching via External Status Input F15Menu G Alarm Setting items G10 Low Alarm Low alarm settingG11 High Alarm High alarm setting High High Alarm 100 High Alarm100 High Alarm Instantaneous flow rate Low Low Alarm Time t Output Example100 85% 75% High Alarm 35% Low Alarm100 25%Setting Function ExampleG22 4-20mA Burn Out Display of the current ClosedOn OpenOffG41 Alm Record1 Alarm record1 Alarm ItemsG43 Alm Record2 Alarm record2 G45 Alm Record3 Alarm record3Menu J Auxiliary Function Setting items Setting range 0 to 10% HysteresisFunction or Determining rate limit value and dead timeExample 1 Step input Example 2 Slurry noiseJ31 Power Frequency Menu K Diagnostic Function Setting itemsK10 Adhesion Check Setting of adhesion Power Supply Code 100 to 240 V AC or 100 to 120 V DCAdhesion Diagnostic Function Menu M Automatic Zero Adjustment Function Setting itemsMenu N Loop Test Setting items SO1 Function or F11 SO2 Function, thenN11 Test Output Value Setting for test output Default setting EnableMenu P Parameter Protection items Write Protect functionDefault setting After password settingG20 Alm Out Act Mode Setting of the active Display and output condition for process alarmsOut Act Mode Display and output condition for setting alarm occurrences Alarm description SelectionTotali Pulse Display Alarm Output UnitAlarms & Warning Messages K12, K13 and K14 are correct Operation VIA Brain Terminal BT200 BT200 Basic OperationsKey Descriptions Key Layout and DisplayCommand Function Function KeysKey-in Sequence AXFA11 Operation Using a BT200 Data update and upload/ download function of BT2001 BT200 Connection Parameter Setting Using a BT200 3 BT200 Screens & Flow Rate Data Display1 BT200 Setting of Selection-Type Data Flow rate units Moved to B Easy SetupB21 Flow UNIT, press 2 BT200 Setting of Numeric-Type Data Flow rate span B23 Flow SPAN, press3 BT200 Setting of Alphanumeric-Type Data Tag number To C Basic SetupMoved to C Basic Setup Operation VIA Hart Communicator Specifications for Communication Line Conditions of Communication LineInterconnectwion between AXFA11 and Hart Communicator Communication Line RequirementsBasic Operation of the Hart Communicator Model Keys and FunctionsDisplay Calling Up Menu AddressesKey Operation Entering, Setting and Sending Data Parameter ConfigurationParameters Data RenewingChecking for Problems Setting ParametersExample of Setting Selection-Type Data Base Flow Unit Example of Setting Numeric-Type Data PV Span PV SpanExample of Setting Alphanumeric-Type Data Tag Number DisplayExample 1 of Other Settings Meter Factor Select MF SetSelect Power Frequency Example 3 of Other Settings Trim Analog Output TrimReturning fld dev to original output appears Select the Scaled D/A trim Returning fld dev to original output appears Example 4 of Other Settings Burst Mode Setting of Burst ModeExiting Burst Mode Example 5 of Other Settings Multidrop ModePolling Exiting Multidrop Mode Example 6 of Other Settings Write ProtectionSetting Password Open Wrt Protect Menu in the Hot key MenuChanging Password Enable Wrt 10minJoker password and Software Seal Other Functions and OperationsMenu Tree On nextE12 J24 J30 P22 P23 Pre-operation Zero Adjustment Actual OperationZero Adjustment Using Display Unit Switches Selection D Major item Sub- item selection DZero Adjustment via External Status Input Ext Auto Zero Maintenance Components ReplacementDisplay Unit Replacement Fuse ReplacementSetting of Switches Amplifier ReplacementSetting of Burnout Switch Output Setting Pins for BurnoutSetting of Write Protect Switch 4 Switch ConfigurationTroubleshooting No IndicationUnstable Zero StartDisagreement Between Indication and Actual Flow Outline 65 10 Cf 10,000How to Set Parameters FunctionsStandard Performance Maximum Power Consumption Safety Requirement StandardsPower Supply Power supply code Size 2200 mm 88 in. to 2600 mm 104Accessories Optional Specifications for AXFA11 Remote Converter Terminal WiringRemote Converter AXFA11G Surface mountingRemote Converter AXFA11G /RK AM11 Replacement Bracket General tolerance in the dimensional outline drawingDedicated Signal Cable AXFC-4-L AXFC-0-LRevision Record Edition Date Revised item
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