Maynuo Electronic M97 series User manual

USER S Guide
ProgrammableDC ElectronicLoad
ModelM9711 M9712M9712BM9712CM9712B30
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ContentUSER SGuide.....................................................................................................................i
ProgrammableDC ElectronicLoad....................................................................................................i
ModelM9712 M9712BM9712CM9712B30.....................................................................................i
Chapter1Overview...............................................................................................................................1
Chapter2TechnicalSpecifications........................................................................................................2
2.1MainTechnicalSpecifications.................................................................................................2
2.2DC ElectronicLoad DimensionalLineDrawings...................................................................4
Chapter3QuickReference....................................................................................................................5
3.1Power-onself-test......................................................................................................................5
3.2IntheEvent ofaProblem........................................................................................................5
3.3Front PanelOperation andBack PanelOperation................................................................6
3.4Keypad Directions ....................................................................................................................7
3.5Menu Operation........................................................................................................................8
Chapter4PanelOperation...................................................................................................................11
4.1BasicOperation Mode............................................................................................................11
4.1.1Constant Current Operation Mode (CC) .......................................................................11
4.1.1.1SetupaStandardConstantCurrentMode......................................................................11
4.1.1.2LoadingandUnloading ConstantCurrentMode...........................................................12
4.1.1.3SoftStartConstantCurrentMode.................................................................................13
4.1.1.4ConstantCurrentModeShifting intoConstantVoltageMode.......................................13
4.1.2Constant ResistanceOperation Mode (CR) .............................................................14
4.1.2.1Settingup aStandardConstant ResistanceMode...............................................15
4.1.2.2Loading and Unloading Constant ResistanceMode.............................................15
4.1.2.3ShiftingfromConstant ResistancetoConstant VoltageMode............................16
4.1.3Constant Voltage Operation Mode (CV)....................................................................16
4.1.3.1SettingUpStandardConstant Voltage Mode........................................................17
4.1.3.2Loading and Unloading Constant Voltage Mode...................................................17
4.1.3.3SoftStart Constant Voltage Mode...........................................................................18
4.1.4Constant PowerOperation Mode (CW).....................................................................18
4.1.4.1Settingup aStandardConstant PowerMode.......................................................19
4.1.4.2Loading and Unloading Constant PowerMode.....................................................19
4.2DynamicTesting Operation...................................................................................................20
4.2.1ContinuousMode (CONTINUOUS)...........................................................................20
4.2.2Pulsed Mode (PULSED).............................................................................................20
4.2.3TriggerMode(TRIGGER)............................................................................................21
4.2.4Setting up Dynamictest operationalParameters.....................................................21
4.2.5WaveformControl........................................................................................................22
4.2.5.1SquareWave............................................................................................................22
4.2.5.2TriangularWave.......................................................................................................22
4.2.5.3TrapezoidalWave.....................................................................................................22
4.2.6TriggerControl.............................................................................................................22
4.2.7ListFunction(Mode SequenceSteps)......................................................................22
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4.2.7.1.List Operation...........................................................................................................23
4.2.7.2ExecutingListFunction............................................................................................23
4.2.8AutomaticTesting Function........................................................................................23
4.2.8.1AutomaticTest Operation........................................................................................24
4.2.8.2Settingup AutomaticTest TriggerOutput Mode...................................................25
4.2.8.3ExecutingAutomaticTestFunction........................................................................25
4.3InputControl............................................................................................................................26
4.3.1ShortCircuit Operation(SHORT)...............................................................................26
4.3.2Input On/Off Operation................................................................................................26
4.4ElectronicLoad OperationRange.........................................................................................26
4.5ProtectionFunctions...............................................................................................................27
4.5.1OverVoltage Protection (OV).....................................................................................27
4.5.2OverCurrent Protection (OC).....................................................................................27
4.5.3OverPowerProtection (OW)......................................................................................28
4.5.4Input PolarityReversed...............................................................................................28
4.5.5OverHeat Protection(OH)...........................................................................................28
4.6RemoteMeasurement Function............................................................................................28
4.7BatteryTesting........................................................................................................................30
4.8Communication protocol........................................................................................................31
4.8.1Introduction...................................................................................................................31
4.8.2Setup Baudrate............................................................................................................32
4.8.3Data...............................................................................................................................32
4.8.4Function Code..............................................................................................................32
4.8.5Errorchecking(CRC)..................................................................................................32
4.8.6CompleteCommand FrameAnalysis........................................................................33
4.8.7CoilWithThe RegisterAddress Allocation ...............................................................35
4.8.8DefinitionOf The Command RegisterCMD..............................................................37
4.8.9Common OperationalFunction Descriptions............................................................38
4.9Remoteoperation...................................................................................................................42
4.9.1M-131 orM-133 Communication Cable.....................................................................42
QuickReminders.................................................................................................................................46
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Chapter1Overview
The new M97XX seriesprogrammableDC electronicload isanewgeneration product designed from
Maynuo ElectronicCo.,Ltd.Incorporatinghigh-performancechips, the M97XX seriesdelivershigh speed and
high accuracywitharesolution of 0.1mV and0.01 mA(basicaccuracyis0.03% and basiccurrentrisespeed is
2.5A/μs).M97XX serieshavewide application fromproduction linesforcellphone chargers, cell phone
batteries, electronicvehiclebatteries, switching powersupplies, linearpowersupplies, and LEDdrivers, to
researchinstitute,automotiveelectronic,aeronauticand astronautic,maritime, solarcelland fuelcelletc.test
and measurementapplications.
FEATURES
•Sixhigh speed operation modes: CC,CR,CV,CW,CC+CV,CR+CV
•Overcurrent, overvoltage, overpower, overheating andpolarityreversal protection
•High-luminancevacuumfluorescent display(VFD)screen withtwoline,fourchanneldisplay
•Intelligentfansystemwill automaticallyactivatebased on changing ambienttemperatures
•Soft-starttimesetting, activating the powersupplyinaccordancewiththe setvoltage value
•Battery test and short-circuittestfunctions
•Capableof rising edge and falling edge dynamictesting
•Supporting externaltriggeron eitherinput oroutput
•External current waveformmonitorterminaloutputterminal
•Supportsremotevoltage compensation and multi-datastorage
•Power-on-self-test, softwarecalibration and standardrack mountable
•Editsarbitrarywaveformsinlistfunction.
•AvailablewithRS232/RS485/USBserialinterfaces.
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Chapter2TechnicalSpecifications
2.1MainTechnicalSpecifications
ThisUserManualcoversonlytheM97XX programmableDCelectronicloads. Pleaserefertothe
followingtablethat detailsthe specificparametersof the150W-300WM97XX DC electronicloads.
3.5KgWeight
108*214*365W*H*D(mm)Dimension
– 10 ～ 70 – 10 ～ 70 – 10 ～ 70 – 10 ～ 70 Nonoperating
0 ～ 40 0 ～ 40 0 ～ 40 0 ～ 40 Operating
Temperature
≒ 25m Ω≒ 300m Ω≒ 35m Ω≒ 55m Ω
Resistance(C
R)
0V0V0V0VVoltage(CV)
66A ≒ 6.6A ≒ 18A ≒ 3.3A ≒ 33A ≒ 3.3A ≒ 33A ≒ 3.3ACurrent(CC)
ShortCircuit
CCsoft-startup Time1mS;2mS;5mS;10mS;20 mS;50mS;100 mS;200mSAccuracy:+ 15%offset+10%FS
DynamicMeasurementTransition List:0-25kHZ;2.5A/uS;T1&T2:60uS-999S;Accuracy:+ 15%offset+10%FS
BatteryMeasruementBatteryInput:0.5-120V;Max. Measurement:Capacity=999/H;Resolution=0.1mA;TimeRange=1S-16HS
0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FSAccuracy
10mW1mW10mW1mW10mW1mW10mW1mWResolution
300W100W300W100W300W100W150W100WWattWMeasurement
(Voltageand
currentinput
value ≥ 10%full
measument)
0.03%+0.08%FS0.03%+0.05%FS0.03%+0.08%FS0.03%+0.05%FS0.03%+0.08%FS0.03%+0.05%FS0.03%+0.08%FS0.03%+0.05%FSAccuracy
1mA0.1mA0.1mA0.01mA0.1mA0.01mA0.1mA0.01mAResolution
0-60A0-6A0-15A0-3A0-30A0-3A0-30A0-3ACurrent
IMeasurement
0.015%+0.03%FS0.015%+0.03%FS0.015%+0.05%FS0.015%+0.03%FS0.015%+0.03%FS0.015%+0.02%FS0.015%+0.03%FS0.015%+0.03%FSAccuracy
10mV1mV10mV1mV10mV1mV10mV1mVResolution
0-150V0-19.999V0-500V0-19.999V0-150V0-19.999V0-150V0-19.999VVoltage
VMeasurement
0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FSAccuracy
10mW1mW10mW1mW10mW1mW10mW1mWResolution
0-300W0-300W0-300W0-300W0-300W0-300W0-150W0-150WRangeCWMode
(Voltageand
currentinput
value ≥ 10%full
measument)
0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FSAccuracy
16bit16bit16bit16bit16bit16bit16bit16bitResolution
0.03 Ω -5K0.03 Ω -10K0.3 Ω -5K0.3 Ω -10K0.03 Ω -5K0.03 Ω -10K0.03 Ω -5K0.03 Ω -10KRangeCRMode
(Voltageand
currentinput
value ≥ 10%full
measument)
0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FSAccuracy
10mV1mV10mV1mV10mV1mV10mV1mVResolution
0.1-150V0.1-19.999V0.1-500V0.1-19.999V0.1-150V0.1-19.999V0.1-150V0.1-19.999VRange
CVMode
0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FSAccuracy
1mA0.1mA1mA0.1mA1mA0.1mA1mA0.1mAResolution
0-60A0-6A0-15A0-3A0-30A0-3A0-30A0-3ARange
CCMode
0-150V0-500V0-150V0-150VVoltage
0-60A0-15A0-30A0-30ACurrent
300W300W300W150WPower
InputRaitng
M9712CM9712BM9712M9711Model
3.5KgWeight
108*214*365W*H*D(mm)Dimension
– 10 ～ 70 – 10 ～ 70 – 10 ～ 70 – 10 ～ 70 Nonoperating
0 ～ 40 0 ～ 40 0 ～ 40 0 ～ 40 Operating
Temperature
≒ 25m Ω≒ 300m Ω≒ 35m Ω≒ 55m Ω
Resistance(C
R)
0V0V0V0VVoltage(CV)
66A ≒ 6.6A ≒ 18A ≒ 3.3A ≒ 33A ≒ 3.3A ≒ 33A ≒ 3.3ACurrent(CC)
ShortCircuit
CCsoft-startup Time1mS;2mS;5mS;10mS;20 mS;50mS;100 mS;200mSAccuracy:+ 15%offset+10%FS
DynamicMeasurementTransition List:0-25kHZ;2.5A/uS;T1&T2:60uS-999S;Accuracy:+ 15%offset+10%FS
BatteryMeasruementBatteryInput:0.5-120V;Max. Measurement:Capacity=999/H;Resolution=0.1mA;TimeRange=1S-16HS
0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FSAccuracy
10mW1mW10mW1mW10mW1mW10mW1mWResolution
300W100W300W100W300W100W150W100WWattWMeasurement
(Voltageand
currentinput
value ≥ 10%full
measument)
0.03%+0.08%FS0.03%+0.05%FS0.03%+0.08%FS0.03%+0.05%FS0.03%+0.08%FS0.03%+0.05%FS0.03%+0.08%FS0.03%+0.05%FSAccuracy
1mA0.1mA0.1mA0.01mA0.1mA0.01mA0.1mA0.01mAResolution
0-60A0-6A0-15A0-3A0-30A0-3A0-30A0-3ACurrent
IMeasurement
0.015%+0.03%FS0.015%+0.03%FS0.015%+0.05%FS0.015%+0.03%FS0.015%+0.03%FS0.015%+0.02%FS0.015%+0.03%FS0.015%+0.03%FSAccuracy
10mV1mV10mV1mV10mV1mV10mV1mVResolution
0-150V0-19.999V0-500V0-19.999V0-150V0-19.999V0-150V0-19.999VVoltage
VMeasurement
0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FSAccuracy
10mW1mW10mW1mW10mW1mW10mW1mWResolution
0-300W0-300W0-300W0-300W0-300W0-300W0-150W0-150WRangeCWMode
(Voltageand
currentinput
value ≥ 10%full
measument)
0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FS0.1%+0.1%FSAccuracy
16bit16bit16bit16bit16bit16bit16bit16bitResolution
0.03 Ω -5K0.03 Ω -10K0.3 Ω -5K0.3 Ω -10K0.03 Ω -5K0.03 Ω -10K0.03 Ω -5K0.03 Ω -10KRangeCRMode
(Voltageand
currentinput
value ≥ 10%full
measument)
0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FS0.03%+0.02%FSAccuracy
10mV1mV10mV1mV10mV1mV10mV1mVResolution
0.1-150V0.1-19.999V0.1-500V0.1-19.999V0.1-150V0.1-19.999V0.1-150V0.1-19.999VRange
CVMode
0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FS0.03%+0.05%FSAccuracy
1mA0.1mA1mA0.1mA1mA0.1mA1mA0.1mAResolution
0-60A0-6A0-15A0-3A0-30A0-3A0-30A0-3ARange
CCMode
0-150V0-500V0-150V0-150VVoltage
0-60A0-15A0-30A0-30ACurrent
300W300W300W150WPower
InputRaitng
M9712CM9712BM9712M9711Model
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Model M9712B30
Power 300W
Current 0-30A
InputRating
Voltage 0-500V
Range 0-3A 0-30A
Resolution 0.1mA 1mA
CC Mode
Accuracy 0.05%+0.05%FS 0.05%+0.08%FS
Range 0.1-19.999V 0.1-500V
Resolution 1mV 10mV
CVMode
Accuracy 0.03%+0.02%FS 0.03%+0.05%FS
Range 0.3Ω-10K 0.3Ω-5K
Resolution 16 bit 16 bit
CR Mode
(Voltageand currentinput
value ≥10%full measument)
Accuracy 0.1%+0.1%FS 0.1%+0.1%FS
Range 0-300W 0-300W
Resolution 1mW 10mW
CWMode
(Voltageand currentinput
value ≥10%full measument)
Accuracy 0.1%+0.1%FS 0.1%+0.1%FS
Voltage 0-19.999V 0-500V
Resolution 1mV 10mV
VMeasurement
Accuracy 0.015%+0.03%FS 0.015%+0.05FS
Current 0-3A 0-30A
Resolution 0.01mA 0.1mA
I Measurement
Accuracy 0.05%+0.08%FS 0.08%+0.08%FS
Watt 100W 300W
Resolution 1mW 10mW
WMeasurement
(Voltageand currentinput
value ≥10%full measument)
Accuracy 0.1%+0.1%FS 0.1%+0.1%FS
BatteryMeasurementBatteryInput:0.5-
120V;Max. Measurement:Capacity=999/H;Resolution=0.1mA;
TimeRange=1S-16HS
DynamicMeasurementTransition List:0-25kHZ;2.5A/uS;T1&T2:60uS-999S;Accuracy:+ 15%
offset+10%FS
CC soft-startupTime1mS;2mS;5mS;10mS;20 mS;50 mS;100mS;200mSAccuracy:+ 15%
offset+10%FS
Current(CC) 3.3A 33A
Voltage(CV) 0V
ShortCircuit
Resistance(CR) 280mΩ
Operating 0～40℃
Temperature Nonoperating –10℃～70℃
Dimension W*H*D(mm) 108*214*365
Weight Kg 3.5
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2.2DCElectronicLoadDimensionalLineDrawings
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Chapter3Quick Reference
3.1Power-onself-test
Verifythatyouhavereceived the followingitemswithyourXT98XXDC ProgrammableElectronic
Load.. Ifanythingismissing, contact yournearest XiTRONauthorized SalesRepresentative'sOffice.
□One powercordforyourlocation/country
□The M97xx User sManual
□One CD (ifyou havepurchased the optionalcommunication accessories)
□One communication cable(ifyou havepurchased the optionalcommunication accessories)
First, makesurethe DC electronicload hasbeen correctlyconnected andpowered on.Pleaserefertothe
followingtableforthe detailed operationalsteps.
Procedure Display Explanation
1. Power-upthe DC
electronicload
SYSTEMSELF TEST
Vxxx
Theelectronicloadpowersupand the VFD
paneldisplaysthe firmwarerevision level
#.
EPROMERROR
EEPROMdamageorlost dataat last power
off session.
2.Waitfor1safter
turningthe DC
electronicload on
ERRORCAL.DATA
EEPROMlost calibration data.
3.Wait another2S
afterERRORhas
occurred
xxxxxxxVxxxxxxxA
xxxxxxxWxxxxxxxX
Displaysthe actualinput voltagean
dcurrent
valuesand theactualpowerand reactant
settingvalues.
3.2IntheEventofaProblem
Ifthe DC electronicload failstopowerup, the followingtroubleshootingstepswill helptodetermine the
problem.
1) Makesurethe powercordisconnectedproperlyandthe Powerswitchhasbeen pushedintoON..
2) Check the powervoltagesettingon the back panel.
Therearetwovoltagesthat powerthe DC load: either110Vor220V. Pleasemakesurethe right voltage
settinghasbeen selected manuallyforyourarea.
3) Check the DC load'sfuse..
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Iffuseisopen, pleasereplaceitwithanotherfusethat meetsthe followingspecifications.
Model Fuse specification
(110VAC)
Fuse specification
(220VAC)
M9711 T0.5A250V T0.3A250V
M9712 T0.5A250VT0.3A250V
M9712B T0.5A250V T0.3A250V
M9712C T0.5A250V T0.3A250V
M9712B30 T0.5A250V T0.3A250V
4)．Replacethe Fuse
Open the plasticcoveron the rearpanelofthe DC electronicload withaflat screwdriver. (See table
3.1)andfind the open fuse. Thenreplacethe open fusewithanewone.
Diagram3.1FuseLocation
3.3FrontPanelOperationandBack Panel Operation
PleaserefertoDiagram3.2forthe front panelofM97XX DC electronicload.
Fuselocation
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