Martel LC-110 User manual

LC-110/H

Reference Manual

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1. Introduction ........................................1

1.1 Customer Service ................................................1

1.2 Standard Equipment ..............................................2

1.3 Safety information ................................................2

2. Calibrator Interface and Operation .....................5

2.1 Milliamp Source .................................................6

2.2 Milliamp Simulate.................................................7

2.3 Milliamp Measure without 24V power .................................8

2.4 Milliamp Measure with 24V power ...................................9

2.5 Volts Measure ...................................................9

3. Main Menu ........................................10

4. Calibrator Setup Menu...............................11

4.1 Setting Auto Ramp Time ..........................................11

4.2 Setting Auto Step Time ...........................................12

4.3 Enabling Valve Test ..............................................12

4.4 Enabling the HART Resistor........................................13

4.5 Selecting mA Span ..............................................13

4.6 Contrast Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.7 Configuring Auto Shutdown .......................................14

4.8 HART Write Enable...............................................14

5. Advanced Features..................................15

5.1 Step and Ramp Operation.........................................15

5.2 Valve Test ......................................................16

5.3 HART 250ΩResistor .............................................16

6. HART Device Communications ........................17

6.1. HART Connection Diagrams.......................................17

6.2 Communications Setup and Selection ...............................19

6.3 Connecting to a HART Device......................................21

6.4 Disconnect.....................................................23

6.5 Function Select Menu ............................................23

6.6 Display Setup & Data.............................................23

6.7 Modify Setup ...................................................24

6.8 Trim, Set, & Zero Menu ...........................................28

6.9 Device Diagnostic ...............................................32

6.10 Data Log & Config Log ..........................................33

6.11 HART Modem Simulation.........................................38

6.12 Error Displays..................................................39

7. Maintenance .......................................45

7.1 Replacing Batteries ..............................................45

7.2 Cleaning the Unit ................................................45

7.3 Fuse Protection .................................................45

8. Specifications .....................................46

9. Warranty ..........................................46

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Introduction

The Martel LC-110 and LC-110H are mA (loop) calibrators designed

to be simple to use and to offer the highest accuracy of any loop

calibrator in their class. The LC-110H differs from the standard

LC-110 in that it incorporates HART communications and supports a

select subset of the HART universal and common practice

commands. This unique feature allows the LC-110H to be used as

both a loop calibrator and basic function communicator.

The calibrator supports the following functions:

 •Currentmeasurementandsourcing,includingselectable24V

supply

 •Voltagemeasurement

 •Valvetestcapability

 •SelectableHART250Ωloop resistor

 •Outputstepandramp

The calibrator has the following features:

 •Largeeasytoreaddisplayformeasurementsanddataentry

 •Digitalknobwithselectabledecadecontrolforquickandeasy

data entry

 •Interactivemenus

 •Inputandoutputjacksprotectedbyselfresettingfuses

providingprotectionto240VAC

Inthecommunicatormodetheuserisabletoreadbasicdevice

information,performdiagnostictests,andtrimthecalibrationonmost

HARTenabledtransmitters.Inthepastthiscouldonlybedonewitha

dedicated communicator.

TheLC-110HcanalsobeusedasaHARTmodem,allowingPChost

applications to perform more sophisticated diagnostics and setup.

HARTformatcommandsfromthehostarepassedtothetransmitter,

andresponsesarepassedback.

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1.2 Standard Equipment

Checktoseeifyourcalibratoriscomplete.Itshouldinclude:

 •Calibrator

 •6xAAAbatteries(installed)

 •Testleads

- The LC-110 is supplied with one set of leads with alligator

clips installed

  -TheLC-110Hissuppliedwithtwosetsoftests.Oneset

with alligator clips and the other set with mini-grabber

style ends

 •Owner’sManual

 •NISTCertificate

1.3 Safety information

Symbols Used

ThefollowingtableliststheInternationalElectricalSymbols.Someor

all of these symbols may be used on the instrument or in this

manual.

SymbolDescription   

AC (Alternating Current)

AC-DC

Battery

CEComplieswithEuropeanUnionDirectives

DoubleInsulated

ElectricShock

Fuse

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PEGround

HotSurface(BurnHazard)

ReadtheUser’sManual(ImportantInformation)

Off

CanadianStandardsAssociation

The following definitions apply to the terms “Warning” and “Caution”.

•“Warning”identifiesconditionsandactionsthatmayposehazards

to the user.

•“Caution”identifiesconditionsandactionsthatmaydamagethe

instrument being used.

Usethecalibratoronlyasspecifiedinthismanual,otherwiseinjury

and damage to the calibrator may occur.

Warning

To avoid possible electric shock or personal injury:

•Donotapplymorethantheratedvoltage.Seespecificationsfor

supported ranges.

•Followallequipmentsafetyprocedures.

•Nevertouchtheprobetoavoltagesourcewhenthetestleadsare

plugged into the current terminals.

•Donotusethecalibratorifitisdamaged.Beforeyouusethe

calibrator,inspectthecase.Lookforcracksormissingplastic.Pay

particular attention to the insulation surrounding the connectors.

•Selecttheproperfunctionandrangeforyourmeasurement.

•Makesurethebatterycoverisclosedandlatchedbeforeyou

operate the calibrator.

•Removetestleadsfromthecalibratorbeforeyouopenthebattery

door.

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•Inspectthetestleadsfordamagedinsulationorexposedmetal.

Checktestleadscontinuity.Replacedamagedtestleadsbefore

you use the calibrator.

•Whenusingtheprobes,keepyourfingersawayfromtheprobe

contacts. Keep your fingers behind the finger guards on the

probes.

•Connectthecommontestleadbeforeyouconnectthelivetest

lead.Whenyoudisconnecttestleads,disconnectthelivetestlead

first.

•Donotusethecalibratorifitoperatesabnormally.Protectionmay

beimpaired.Whenindoubt,havethecalibratorserviced.

•Donotoperatethecalibratoraroundexplosivegas,vapor,ordust.

•Disconnecttestleadsbeforechangingtoanothermeasureor

source function.

•Whenservicingthecalibrator,useonlyspecifiedreplacementparts.

•Toavoidfalsereadings,whichcouldleadtopossibleelectricshock

orpersonalinjury,replacethebatteryassoonasthebattery

indicator appears.

•Toavoidaviolentreleaseofpressureinapressurizedsystem,shut

off the valve and slowly bleed off the pressure before you attach

the pressure module to the pressure line.

Caution

To avoid possible damage to calibrator or to equipment under test:

•Usetheproperjacks,function,andrangeforyourmeasurementor

sourcing application.

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2. Calibrator Interface and Operation

MARTEL ELECTRONICS

LC-110H Precision Loop

Calibrator w/HART™

100%

25%

EXIT

Source 0.00%

4.000mA

Simultaneous % Display

4mA = 0.00%

20mA = 100.00%

Cursor

100% Key: Sets Output to 20mA

25% Key: Steps 4, 8, 12, 16, 20mA

0% Key: Sets Output to 4mA

Digital Knob Sets Output Value

Press to Move Cursor

Press to Enter Setup Menu

Press Again to Exit

Step / Ramp Enable

Backlight

On / Off

Mode

Figure 1

Figure1istypicalofthemaindisplayforalloperatingmodes.It

shows the present measurement or output value. The individual

operating modes are described below.

UsetheMENU/EXITkeytodisplaythemainmenudescribedin

section3toselecttheprimaryoperatingmodeofthecalibrator,to

accessthecalibratorsetupfunctions,ortoenterHARTmode.

Inoutputmode:

 •Presstheknobtomovethedecadecursor.

 •Rotatetheknobtoincrementordecrementtheoutputinsteps

indicated by the selected decade.

 •Usethe3percentkeystodirectlysettheoutputtopreset

values.

 •Usethestep/rampkeytoselectandstoptheseadvanced

modeswhicharedescribedinsection5.1.

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2.1 Milliamp Source

InthemASourcemodethecalibratoroutputsasignalfrom0to

24mAintoaloadofupto1000ohms(750ohmsiftheinternalHART

resistor is switched on).

Figure2showsthemaindisplayandtypicalconnectionsforthis

mode.

MARTEL ELECTRONICS

LC-110H Precision Loop

Calibrator w/HART™

100%

25%

EXIT

Source 0.00%

4.000mA

4-20mA INPUT DEVICE

RECORDER/INDICATOR

SCADA SYSTEM ETC.

(+)

(–)

4 to 20mA

Figure 2

•Presstheknobtomovethedecadecursor.

•Rotatetheknobtoincrementordecrementtheoutputinsteps

indicated by the selected decade.

•Usethe3percentkeystodirectlysettheoutputtopresetvalues.

•Usethestep/rampkeytoselectandstoptheseadvancedmodes

whicharedescribedinsection5.1.Whenautomaticsteporramp

is active one of the following is shown in the lower left corner:

Automatic step:

Automatic ramp: ∧

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•PressMENU/EXITtoenterthemainmenudescribedinsection3.

•Thetext‘ValveTest’isshowninthelowercenterwhenthevalve

testfunctionhasbeenenabledontheSetupMenu,section4.3.

Valvetestisdescribedinmoredetailinsection5.2.

•Thetext‘250Ω’textisshowninthelowerrightcornerwhenthe

HARTresistorhasbeenenabledontheSetupMenu,section4.4.

2.2 Milliamp Simulate

InthemASimulatemodethecalibratorfunctionslikea2-wire

transmitterbycontrollingtheloopcurrentfromanexternalpower

supply. This function is a great way to test a loop with the transmitter

removed.

Figure3showsthemaindisplayandtypicalconnectionsforthis

mode.

MARTEL ELECTRONICS

LC-110H Precision Loop

Calibrator w/HART™

100%

25%

EXIT

Simulate 0.00%

4.000mA

POWER SUPPLY

30 VDC MAX

(+)

(–)

4 to 20mA

4-20mA

INPUT DEVICE

(+)

(–)

Figure 3

•Presstheknobtomovethedecadecursor.

•Rotatetheknobtoincrementordecrementtheoutputinsteps

indicated by the selected decade.

•Usethe3percentkeystodirectlysettheoutputtopresetvalues.

•Usethestep/rampkeytoselectandstoptheseadvancedmodes

whicharedescribedinsection5.1.Whenautomaticsteporramp

is active one of the following is shown in the lower left corner:

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Automatic step:

Automatic ramp: ∧

•PressMENU/EXITtoenterthemainmenudescribedinsection3.

•Thetext‘ValveTest’isshowninthelowercenterwhenthevalve

testfunctionhasbeenenabledontheSetupMenu,section4.3.

Valvetestisdescribedinmoredetailinsection5.2.

•Thetext‘250Ω’textisshowninthelowerrightcornerwhenthe

HARTresistorhasbeenenabledontheSetupMenu,section4.4.

2.3 Milliamp Measure without 24V power

InthemAMeasuremode,thecalibratordisplaystheloopcurrent.

Figure4showsthemaindisplayandtypicalconnectionsforthis

mode.

MARTEL ELECTRONICS

LC-110H Precision Loop

Calibrator w/HART™

100%

25%

EXIT

Measure 0.00%

4.000mA

4-20mA

OUTPUT DEVICE

(+)

(–)

4 to 20mA

Figure 4

•PressMENU/EXITtoenterthemainmenudescribedinsection3.

•Thetext‘250Ω’textisshowninthelowerrightcornerwhenthe

HARTresistorhasbeenenabledontheSetupMenu,section4.4.

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