APC AXFA11G user manual Unstable Zero, Start

Page 107

10.3.2 Unstable Zero

START

Investigate whether or not the flowtube is filled with fluid and that it is free of bubbles.

*1

Is the flowtube	NO
completely full of fluid?
YES
Are there bubbles	YES
in the fluid?

NO

Check for the presence of valve

10. MAINTENANCE

*1: When checking for bubbles, it is convenient if there is a gas vent hole on the flowtube’s downstream side.

Particular care must be taken in the case of horizontal mounting. In order to ensure complete filling of the tube, either adjust the mounting position or switch to vertical mounting.

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

leakage.

Are valves leaking?

NO

YES

Replace the valve(s).

•Confirm the flowmeter grounding.

•Confirm whether or not the grounding wire is disconnected from the earth flange.

Is the flowmeter properly	NO
Is the flowmeter properly
grounded?

YES

Recheck the fluid to be measured.

	• Does the fluid’s	YES
	conductivity vary?	YES
	• Is the fluid conductivity
	within the limits?
	NO
	Is the fluid likely to	YES
	contain deposits?
	NO
	Is the flowmeter	YES
	located near motors, transformers,	YES
	located near motors, transformers,
	or electric equipment?
	NO
	Contact a service center.

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

•Ensure that the fluid’s conductivity changes as little as possible.

•Do not use the meter when fluid

conductivity is out of limits.

•Whenever possible, reduce the flow velocity to being in the vicinity of the lower conductivity limit.

•Remove dirt and scale of and near

electrodes.

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

Provide the meter with sufficient shielding or move it away from the electrical equipment

F1006.EPS

10-5	IM 01E20C01-01E

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Contents Users ManualAXFA11G Contents Operation VIA Hart Communicator Revision Record Introduction Safety and Modification PrecautionsGuarantee will not apply in the following cases Using the Magnetic Flowmeter SafelyWarranty Combination Remote Flowtubes Storage Precautions Handling PrecautionsChecking Model and Specifications AccessoriesSurface Mounting Wall Mounting InstallationInstallation Location MountingUnit mm approx. inch Panel cutout 203 Mounting fixture 172 Inch Pipe MountingPanel Mounting Inch pipe Mounting fixture Washer Clamp screwCables WiringWiring Precautions Dedicated Signal Cable AxfcOn the converter side Wiring PortsExcitation Cable/Power Cable/Output Cable Unit mm approx. inch Crimp TerminalPlastic gland When there are no particular optional specificationsWiring using waterproof glands Conduit WiringRemoving Cover Wiring ConnectionsTerminal Configuration DC Power Connection Precautions for Wiring of Power Supply CablesProtective grounding terminals Wiring the Remote Flowtube with the AXFA11 ConverterAxfc Dedicated signal cable Excitation cable GroundingTo 20 mA DC Current Output Connecting to External Instru- mentsStatus Input Pulse Output13 Status Output Connection Status Output / Alarm OutputData display area Operating Panel Configuration and FunctionsSetting switch operations None ContentDisplay items Reversed-character indicationDisplay Mode → Setting Mode Display Unit Setting MethodsSetting Mode To Parameter Search Mode Setting Example for Selection-Type Data Flow rate units Parameter Setting ProcedureSetting Mode Parameter Sub-item Sub-item Current unit settingSub-item Parameter Search Mode B21 Base Flow UnitB23 Flow Span Setting Example for Numeric-Type Data Flow rate spanSetting Mode Condition Major Item Parameter Search Mode Setting modeIncorrect setting Setting Example for Alphanumeric-Type Data Tag numberSetting Mode Condition Sub-item Parameter Search Mode Major itemModified value Search Mode Selection CSub-item Major item Parameter Description Item a Menu a Display items Item B Menu B Easy Setup itemsIndicated item Default value Units Description Display unitName Data range Name Data range Position Default value Units Display unit Item C Menu C Basic Setting itemsName Item D Menu D Total Setting itemsDefault value Units Display unit Name Data range Position Default value Display unitItem F Menu F Status Functions Setting items Item E Menu E Pulse Setting itemsItem G Menu G Alarm Setting items ALM-SIG Over ALM-SETTINGALM HYS ALM OUT ACTItem J Menu J Auxiliary Function Setting items Item H Menu H Display Setting itemsUnits Display unit Item K Menu K Diagnostic Function Setting itemsItem P Menu P Parameter Protection items Item N Menu N Loop Test Setting itemsData Range Menu B Easy Setup itemsUnit/P 10-9 FU u Unit/P 10-6 FU Pulse/s Example When 1000 m3/h is set for B23/C42 Flow SpanDescription B41/H11 Display Select2 and B42/H12 Display Menu C Basic Setting itemsMeter Factor Settings Is set forB22/C41 Base Time Unit Menu D Total Setting itemsC47 User Span Select Selection of the use C49 Flow User SpanIs set forB22/C41 Base Time TOTAL, and A32 DIF Total when BrainF13 Flow UnitE20 Pulse Active Mode Menu E Pulse Setting itemsSetting for E20 Pulse Active Mode G33 Alm-HH/LL to Yes Menu F Status Functions Setting itemsSetting Function Description Switch Lower and D24 Ttl Switch UpperVal Upper No Function No input function1 Status Output for Automatic Multiple Ranges Switching Multiple ranges settingMultiple Ranges Setting Automatic multiple ranges switching Status Output for Automatic Multiple Ranges SwitchingF10 SO1 Function F11 SO2 Function Parameter setting sequenceFor automatic multiple ranges switching F14 SO1/2 Active ModeF15 2 Multiple Ranges Switching via External Status InputG11 High Alarm High alarm setting Menu G Alarm Setting itemsG10 Low Alarm Low alarm setting Output Example High High Alarm100 High Alarm 100 High Alarm Instantaneous flow rate Low Low Alarm Time t25% 100 85% 75% High Alarm35% Low Alarm 100ClosedOn OpenOff Setting FunctionExample G22 4-20mA Burn Out Display of the currentG45 Alm Record3 Alarm record3 G41 Alm Record1 Alarm record1Alarm Items G43 Alm Record2 Alarm record2Setting range 0 to 10% Hysteresis Menu J Auxiliary Function Setting itemsExample 2 Slurry noise Function orDetermining rate limit value and dead time Example 1 Step inputPower Supply Code 100 to 240 V AC or 100 to 120 V DC J31 Power FrequencyMenu K Diagnostic Function Setting items K10 Adhesion Check Setting of adhesionSO1 Function or F11 SO2 Function, then Adhesion Diagnostic FunctionMenu M Automatic Zero Adjustment Function Setting items Menu N Loop Test Setting itemsWrite Protect function N11 Test Output Value Setting for test outputDefault setting Enable Menu P Parameter Protection itemsAfter password setting Default settingOut Act Mode G20 Alm Out Act Mode Setting of the activeDisplay and output condition for process alarms Output Unit Display and output condition for setting alarm occurrencesAlarm description Selection Totali Pulse Display AlarmAlarms & Warning Messages K12, K13 and K14 are correct Key Layout and Display Operation VIA Brain Terminal BT200BT200 Basic Operations Key DescriptionsKey-in Sequence Command FunctionFunction Keys 1 BT200 Connection AXFA11 Operation Using a BT200Data update and upload/ download function of BT200 3 BT200 Screens & Flow Rate Data Display Parameter Setting Using a BT200B21 Flow UNIT, press 1 BT200 Setting of Selection-Type Data Flow rate unitsMoved to B Easy Setup B23 Flow SPAN, press 2 BT200 Setting of Numeric-Type Data Flow rate spanMoved to C Basic Setup 3 BT200 Setting of Alphanumeric-Type Data Tag numberTo C Basic Setup Operation VIA Hart Communicator Communication Line Requirements Specifications for Communication LineConditions of Communication Line Interconnectwion between AXFA11 and Hart CommunicatorKeys and Functions Basic Operation of the Hart Communicator ModelKey Operation DisplayCalling Up Menu Addresses Data Renewing Entering, Setting and Sending DataParameter Configuration ParametersExample of Setting Selection-Type Data Base Flow Unit Checking for ProblemsSetting Parameters PV Span Example of Setting Numeric-Type Data PV SpanDisplay Example of Setting Alphanumeric-Type Data Tag NumberSelect MF Set Example 1 of Other Settings Meter FactorSelect Power Frequency Trim Example 3 of Other Settings Trim Analog OutputReturning fld dev to original output appears Select the Scaled D/A trim Returning fld dev to original output appears Example 5 of Other Settings Multidrop Mode Example 4 of Other Settings Burst ModeSetting of Burst Mode Exiting Burst ModePolling Example 6 of Other Settings Write Protection Exiting Multidrop ModeOpen Wrt Protect Menu in the Hot key Menu Setting PasswordEnable Wrt 10min Changing PasswordOther Functions and Operations Joker password and Software SealOn next Menu TreeE12 J24 J30 P22 P23 Actual Operation Pre-operation Zero AdjustmentSelection D Major item Sub- item selection D Zero Adjustment Using Display Unit SwitchesZero Adjustment via External Status Input Ext Auto Zero Fuse Replacement MaintenanceComponents Replacement Display Unit ReplacementOutput Setting Pins for Burnout Setting of SwitchesAmplifier Replacement Setting of Burnout Switch4 Switch Configuration Setting of Write Protect SwitchNo Indication TroubleshootingStart Unstable ZeroDisagreement Between Indication and Actual Flow 65 10 Cf 10,000 OutlineFunctions How to Set ParametersStandard Performance Size 2200 mm 88 in. to 2600 mm 104 Maximum Power ConsumptionSafety Requirement Standards Power Supply Power supply codeAccessories Terminal Wiring Optional Specifications for AXFA11 Remote ConverterSurface mounting Remote Converter AXFA11GGeneral tolerance in the dimensional outline drawing Remote Converter AXFA11G /RK AM11 Replacement BracketAXFC-0-L Dedicated Signal Cable AXFC-4-LEdition Date Revised item Revision Record