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Aim-TTI SMU4000 Series Instruction Manual Download Page 82

12 - Application notes   

Source- Measure considerations 

  

 

81     

 

 SMU4000 Series Instruction Manual 

 

APPLICATION NOTES 

Source- Measure considerations  

Stability 

Due to their fast and agile output capabilities, source measure units are sensitive to the impact 

of load characteristics, interconnection inductance and feedback loop characteristics, which can 

give rise to unexpected instability or poor dynamic behaviour. However, there are key steps that 

can be taken to help over-come these potential issues.  

•

 

Ensure all current carrying output wires (MAIN HI and MAIN LO) are as short and thick 

as possible. 

•

 

Ensure all current carrying output wires (MAIN HI and MAIN LO) are twisted tightly 

together to minimise loop area. 

•

 

Enable high reactance mode. 

•

 

Fix voltage and current ranges to a suitable manual selection.  

•

 

Be very cautious when utilizing the 200nA and 2µA ranges, as these ranges are very 

sensitive. Try selecting the 20µA range instead.  

•

 

Reduce the maximum slew rate.  

•

 

Reduce all output load inductance and capacitance as much as possible. 

 

Noise

 

Pickup

 

Due to their high resolution and numerous low level measurement ranges, source measure 

units are very susceptible to noise pickup. However, there are many things that can be done to 

help reduce noise pickup issues. 

•

 

Always set an integer number of PLCs for the measurement period. Extend the 

measurement period as long as possible. It’s recommended to use at least 50 PLC for 

the 200nA range.  

•

 

Utilize the guard capability. Ensure the guard is kept as close to the Main Hi signal as 

possible. This can significantly reduce leakage issues.  

•

 

When utilizing the 2-wire terminal configuration, ensure the cables are twisted tightly 

together. Essentially shield the MAIN HI signal with the MAIN LO signal. Alternatively 

use a 4mm banana to BNC adaptor and use a screened BNC cable instead. Ensure the 

BNC cable is correctly rated for the voltage and current levels used.  

•

 

Where possible try to place the DUT into a shielded enclosure that is connected to 

MAIN LO.  

•

 

Utilize the front panel ground chassis connection as a shield, however this is unlikely to 

be as effective as the MAIN LO terminal.  

•

 

Turn off/ route cables away from any known noise sources within the environment. 

 

 

 

 

Summary of Contents for SMU4000 Series

Page 1: ...SMU4000 SERIES SOURCE MEASURE UNITS INSTRUCTION MANUAL EN ...

Page 2: ... 8 Switching On 9 Instrument overview 10 Front Panel 10 Rear Panel 12 Introduction 14 Using this Manual 14 Navigation Controls 15 Home screen 17 Getting Started 19 Connections 19 High Voltage Interlock SMU4201 only 20 Basic operation 21 Selecting a Range 23 Measurement selection 25 Saving Data 26 Sample table 28 Measure Statistics 29 Graph 30 Graph Menu 31 ...

Page 3: ...odes 44 Load Modes 45 Measure Modes 48 Terminal selection 49 Measurement count 50 Source shape 51 Output off state 60 Source Control 62 Limits and Protection 64 Source Level 66 Timing options 67 Sequence mode 70 Digital I O 77 Overview 77 Math Functions 79 Applying calculations to measurements 79 Measure 79 Result sorting 80 Tolerance 80 Application notes 81 Source Measure considerations 81 ...

Page 4: ...ent Zero and Self Calibration 90 Routine Calibration 90 Factory Default settings 91 Specification 93 Specification Conditions 93 Key Specifications of SMU4000 series 93 Output Power Voltage and Current Capability 96 Protection 97 Measurement Result Buffer 97 Digital Input Output DIO 98 Remote Control Interfaces 98 System Speeds 98 Environmental 99 Mechanical 99 ...

Page 5: ...oltage current source and advanced precise voltage current meters in a compact half rack 2U casing capable of precisely supplying positive and negative voltages sourcing or sinking power while simultaneously measuring both current and voltage for I V characterising With high current and power combined with fast measurements and low glitch auto ranging speed it is the ideal solution for industrial ...

Page 6: ...strument all information must be read before proceeding WARNING Indicates a hazard that if not avoided could result in injury or death CAUTION Indicates a hazard that could damage the product that may result in loss of important data or invalidation of the warranty NOTE Indicates a helpful tip EXAMPLE Indicates an example to show further details Caution possibility of electric shock UKCA UK Confor...

Page 7: ...ined to perform such adjustments and is aware of the hazards involved When connected terminals may be live and opening the covers or removal of parts except those that can be accessed by hand may expose live parts To avoid electric shock or damage to the instrument never allow water to get inside the case If the instrument is clearly defective has been subject to mechanical damage excessive moistu...

Page 8: ...instrument uses a fan fitted to the rear panel Take care not to restrict the rear air exit or the inlet vents at the front sides and underneath In rack mounted situations allow adequate space around the instrument and or use a fan tray for forced cooling If the air inlet vents are restricted for any reason the fan can be set to fast to compensate for minimal restrictions see Air vents for more det...

Page 9: ... disconnected from all voltage sources before it is opened for any adjustment Capacitors inside the SMU may still be charged even if it has been disconnected from all voltage sources these will be safely discharged a few minutes after switching off LEDs on the HV rail to indicate that charge is still present as such it s not safe to dismantle until all LEDs have gone out Remove the case Mains supp...

Page 10: ... for any signs of damage Do not use if lead is damaged Before use inspect the instrument for any signs of damage Do not use if damaged Switching On Connect the instrument to the AC supply using the mains lead provided Press the standby button the button will illuminate to indicate start up At power up the instrument will display a start up message whilst initialising the application Loading takes ...

Page 11: ...the connection of flash drives which conform to the Mass Storage Class specification and are formatted as FAT32 Setups sequences and lists can be imported and exported via the flash drive port see Storing and Loading Setup Files for more details Measurement data can be automatically recorded to the flash drive on completion of a test run see Saving Data for more details Images of the display can b...

Page 12: ...ons to the instrument with the OUTPUT off and in the Open off state this is the only output state that completely isolates the external circuitry from the instrument CAUTION All terminals are rated to 300Vpeak with respect to earth ground Safety will be maintained if voltages up to 21Vpeak for SMU4001 or 210Vpeak for SMU4201 are accidentally applied between inappropriate terminals in excess of the...

Page 13: ... Sense S and Guard G can be set and operate at voltages up to 210Vpeak Voltages greater than 60V are deemed hazardous voltages Only use test leads conforming to IEC61010 031 Always make connections to the instrument with the OUTPUT off and in the Open off state this is the only output state that completely isolates the external circuitry from the instrument CAUTION All terminals are rated to 300Vp...

Page 14: ...user retrofittable option available from the manufacturers or their agents The default GPIB address is 10 See Remote interfaces for more details USB The USB device port accepts a standard USB cable The Windows plug and play functions should automatically recognise that the instrument has been connected See Remote interfaces for more details K Lock The Kensington slot is a standard slot that can be...

Page 15: ... italics e g Using this Manual The descriptions in this manual relate to using the instrument via the touch screen alternatively the hard keys and rotary knob can be used See Navigation Controls for details on how to use the rotary knob to control the instrument Throughout this manual the navigation through menus will be shown at the top of a section using the following format MENU Sub Menu Option...

Page 16: ... initiate once the desired button has been selected press to engage the button The knob can also be used to modify home screen parameters once they have been selected Menu Scrolling Some menus contain more than one page of options when this is the case arrows are available to scroll the page up or down OK Cancel The OK and Cancel keys are available on all screens where changes can be made pressing...

Page 17: ...tions Auto Disabled etc Numeric Selection Numeric selection is 0 9 decimal point and minus sign if negative values can be entered Unit Selection Actions Bksp Remove the previous number Revert Revert the value back to the original before the value was amended with the keypad Rev Pol Available when a positive or negative value is to be accepted toggles between plus and minus symbol A full QWERTY key...

Page 18: ...V working mode Touch to change between LV and HV By default the unit is locked into LV mode and password protected see Password protection for more details Date and time touch to edit see Date and Time for more details Source and Limits User defined source sink level and imposed limits depending upon the selected mode Values can be modified by direct touch keypad entry simply press on the relevant...

Page 19: ...FF Output Off ON Output On CC Output On Constant Current CV Output On Constant Voltage CMV Output On Constant Maximum Voltage Terminal configuration 2 Wire Main terminals Source and Sense 2W Guard Main terminals Source and Sense HI Sense terminal Guard 4 Wire Main terminals Source and Sense Sense Terminals Sense Off State Output Off 0V 100µA Source 0V 100uA current limit Hi Z Terminals are high im...

Page 20: ...inals offer additional Guard connections for screening see Terminal selection for more details Front panel Main HI and LO terminals are permanently wired in parallel with the rear panel F Force terminals Front panel SENSE HI and LO terminals are permanently wired in parallel with the rear panel S Sense terminals WARNING Only ever use either the front or rear terminals never use both at once Hazard...

Page 21: ...on the status bar of the home screen 2 External DIO control This allows for the controlling of the interlock via external circuitry This is primarily designed for helping to ensure the safe operation and safety of users of the equipment when embedded into a test system or test fixture For safety reasons test fixtures that may contain hazardous voltages often utilize a safety cover a form of lid or...

Page 22: ... the required value and press OK Press the RUN hard key to activate the output The default measurement count is infinite therefore measurements will be recorded up to the maximum amount of 100 000 Once reached the output will remain on but measurements will no longer be recorded The default measurement period is 1 PLC One Power Line Cycle PLC for 50Hz is 20ms and one PLC for 60Hz is 16 67ms Mains ...

Page 23: ...ate the output Highlight the source value using the rotary knob Press the knob to enter the editing state the knob will now scroll through the source values Scrolling left and right will change the value resolution Press again to edit the numeric value NOTE A green digit indicates the encoder is in an active state any adjustments using the encoder are live and will be actioned at the terminals imm...

Page 24: ...c range selection determines and selects the most suitable ranges based upon the measured readings and source settings Timing considerations Faster Response Speeds Selecting a manual range can assist with faster response speed Auto ranging changes the range whilst the output is running this can lead to increased rise measurement settling times whilst the instrument selects the appropriate range se...

Page 25: ...it considerations NOTE The source and limit level settings cannot exceed 105 of the selected associated range The limit setting is restricted to a minimum of 10 of the manually selected range If a lower manual range is selected that causes the existing source or limit level setting to exceed the selected range maximum the associated level is set to 105 of the new range Likewise if a higher manual ...

Page 26: ... the home screen results section within the sample table measurement buffer and within the measurement statistics menu The primary measurement is used for setting the live and custom measurement reference math operations See Math and defining the measurement that is displayed on the YT graphical view See Graph NOTE The exported CSV files contain all four measurement types NOTE Alternative primary ...

Page 27: ... automatically cleared when the instrument is power cycled Buffered data can be saved as a CSV file to a USB flash drive connected via the front panel either manually or automatically The CSV file will contain the following information Index Active Mode Output state Measurement results V and A Calculated results R and W System Date System Time Measurement Timestamp Sequence Mode Step and Iteration...

Page 28: ...ually save data press the USB Store button A CSV file will be saved to the USB Flash drive each time the USB Store button is pressed Buffer status The buffer status is displayed as a percentage within the Clear button when pressed the data will be cleared and set to 0 View buffer data Buffered Data can be viewed in three different formats from the front panel Individually indexed measurements see ...

Page 29: ...ple table to the csv file will be formatted as YYYY MM DD The up and down arrow keys can be used to scroll through the results in the sample table Using the touch screen pressing and holding the button will scroll through the results faster A single result can be selected and used as a reference point for a math function To set the reference point use the encoder to select the required primary mea...

Page 30: ...m the sample table alone The measurement statistics menu provides details of Minimum sample value Maximum sample value Total measurement span min to max Average mean Standard deviation of the measurements for both the primary and secondary measurements The measurement statistical data is based on the data that is in the sample table and is updated accordingly as new data is recorded NOTE Changes t...

Page 31: ...ce for more details There are two separate graphing menus graphing options with full manual control that is accessed from the Configuration CNFG menu and a view of the graph that is accessed from the home screen NOTE The two graph menus are linked changes made in the Graph menu will be reflected in Graph view and vice versa Feature Graph Blue background CNFG Files Graph Graph View Black Background...

Page 32: ...set compensation Auto Scaling is activated by pressing a Graph Type button Graph Type Measurement data can be displayed in two formats as two different graph types YT Graph Default The primary measurement data is plotted against time on the X axis Voltammogram I V Scatter A plot of voltage against current This graph type is ideal for I V curve tracing Select the graph type using the Voltammogram a...

Page 33: ... available by pressing the Settings button Graph Style Line Default Show the measured points connected in a linear format with a single line Point Show each measured point on the graph as a single pixel Minimum position A minimum X and Y position can be defined starting the plotted results at a defined point ...

Page 34: ... been selected the markers menu will be active Marker orientation can be set to horizontal using the H pos button or vertical using the V pos Button When both X and Y markers are set to the same orientation the difference between the two is displayed in the bottom right hand corner of the display in the marker s menu To see the full resolution use the Stats button A reference point based on the se...

Page 35: ...menu will be active NOTE This can be very useful when comparing two DUTs device under test to see the difference in performance between the two One reference trace can be stored at any given time The trace menu gives the following options Save Store the existing latest measurement graphical waveform as the reference trace Load Recall and display the previously saved reference trace Disable Stop vi...

Page 36: ...ain to disable the movement via encoder and return to navigation NOTE To familiarise a new user with the graph navigation using the Auto Scale Type button to define the best suited ranges for the data then using the manual scale to zoom in and out on specific areas of the measurement data by increasing and decreasing the scale as needed Panning Panning can be set to horizontal using the H Pan butt...

Page 37: ...gh scaling or panning options are not available one method that can be implemented for focusing in on an area of interest can be to re run a specific test within the window of interest Graph view allows for the quick and easy view of the full measurement buffer data which means that a specific area of interest is very easy to find especially with the use of the markers As an example re running an ...

Page 38: ...type will vary depending on the set mode there are two types of files that will be stored STP Manual Setup file type STP files contain all the set parameters from the Manual Setup when one of the following Manual Modes are selected SV SC LC LR LP MV MC MR or MHR STP files stored in the internal memory can be added to a Sequence See Sequence mode for more details SEQ Sequenced Setup file type SEQ f...

Page 39: ...n Delete a Setup from the Internal Memory To delete a Setup from the Internal Memory select the required setup followed by Delete A pop up box will appear requesting to confirm the action Export a file to a USB Flash Drive Once a setup has been stored as an internal file it can be exported to a USB Flash Drive To export a file select the file to be transferred once selected the file name will be h...

Page 40: ...import a file select the file to be imported once selected the file name will be surrounded with a green box press Store Internal to import The file will appear in the available setups list with Internal as the location File type colour File names may appear in the following colours Yellow Compatible White Incompatible with the current firmware version or model Red Corrupted Unable to be used or r...

Page 41: ... accompanied by a pop up Pop ups are colour coded based on the type of event that has occurred The duration that the pop up is displayed can be changed using the Message Time button this can be set to a duration in seconds or infinite When set to infinite touch the pop up to remove it Selecting the Event Log symbol on the status bar will open the event log menu this menu can also be accessed throu...

Page 42: ...al setup is set to anything other than the mode related to the easy set the settings will still be available when returning to that mode See Factory Default settings for more details Once an easy setup has been selected further settings can be configured using the Manual Setup menu To activate a pre configured setup select the required option and press OK If no option is selected pressing OK will ...

Page 43: ...e selected source and measurement mode or Operating Mode Manual Setup options and settings are as follows Operating Mode Source Load Measurement Sequenced Mode Terminal selection Measurement count Source shape Output off state Source Level Limits and Protection Timing options Result sorting Math Functions When the manual setup is complete it can be stored in non volatile memory or exported via a U...

Page 44: ...E All options and settings in the Manual Setup menu are saved to the selected Operating Mode Operating Mode options are as follows Source Voltage Default Source Current Load Current Load Resistance Load Power Measure Voltage Measure Current Measure Resistance and High Resistance Sequence mode NOTE Changing the mode whilst the instrument output is running will disable the output to the given Off St...

Page 45: ...TE In SV mode the SMU will sink current if a voltage is set below that of the external source For example if a 5 V battery is connected as a voltage source HI to battery ve and the SMU is set to source 4 V in SV mode the SMU will sink current from the external battery source V and measure I Source Current SC CNFG Source Measure Action Manual Setup Overall Mode SC Mode When set to source current th...

Page 46: ... the external source terminals Dropout voltage Resistive discharge with voltage dropout The primary purpose of the dropout facility is to protect batteries from being excessively discharged When the source voltage falls below the Dropout threshold voltage setting the load will reduce the current it draws to zero This is a dynamic limit not a latched state so if the source voltage recovers above th...

Page 47: ...hereas if the load setting is above the limit of the supply then the load will saturate at its minimum operating resistance with the supply delivering its designed current The best way to test a constant current supply is to use the instrument in constant resistance mode Load Resistance LR CNFG Source Measure Action Manual Setup Overall Mode LR Mode Load resistance mode simulates a standard resist...

Page 48: ...rce because of its internal impedance so the increase in power is less than expected The load responds to this by reducing its resistance even more in an attempt to increase the current and obtain the required power A cross over point is reached when the fall in voltage outweighs the increase in current and the load cannot draw the required power This leads to the latch up condition with the load ...

Page 49: ...up Overall Mode MHR Mode When set to Measure Resistance mode the SMU utilizes the internal current source designed to measure low resistance values at high current levels When set to Measure High Resistance the SMU mode utilizes the internal voltage source and is designed to measure high resistance values at high voltages There are no specific resistance measurement ranges Careful consideration of...

Page 50: ...or rear terminals never use both at once Hazardous voltages will appear on both sets of terminals Hazardous voltages will appear on both sets of terminals Always make connections to the instrument with the OUTPUT off and in the Open off state this is the only output state that completely isolates the external circuitry from the instrument Guarding Guarding can be used for very low current and high...

Page 51: ...executes and applies the next source level setting once all measurements for the existing level setting are complete as such setting the measurement count to infinite would result in only the first source level setting ever being applied In steady shape operation any new source level set immediately overrides the existing level setting irrespective of how many measurements have been made If the ou...

Page 52: ...Source Shape The Shape selection defines the source level shape Source level shape options are as follows Steady Default Pulse Sweep Pulsed Sweep List Number of Shapes The number of shapes defines the number of times a configured wave shape is sourced This can be set when a shape waveform other than Steady is selected ...

Page 53: ...dy shape is selected the SMU provides a continuous stable source level The Level can be updated from the Manual Setup screen and the Home screen When the output is enabled real time adjustments can be made from the Home screen see Live adjusting source and limits from the home screen ...

Page 54: ...o two individual settings one for each level The pulse Levels 1st and 2nd can be updated from the Manual Setup screen and the Home screen When the output is enabled real time adjustments can be made from the Home screen see Live adjusting source and limits from the home screen Timing All pulse timing is based upon the settling measure delay pulse level measurement period and measurement count The ...

Page 55: ...is updated when the sweep settings are changed Linear Logarithmic Step size stop start points 1 Dual linear Dual logarithmic Selecting Dual linear or logarithmic shape provides a swept source level in steps between defined start and end levels and back to the start level NOTE The number of points in a dual sweep refers to the total number of points from the start to the end and back to the start W...

Page 56: ...ing measure delay measurement period and measurement count The measure delay shown in the following diagram shows a user defined measure delay alternatively an automatic settling delay can be selected see Timing options for more details The time it takes to complete one single sweep can be calculated by Number of Points x Settling Delay Measurement Period x Measurement Count ...

Page 57: ... step size is updated when the sweep settings are changed Linear Logarithmic Step size stop start points 1 Dual linear Dual logarithmic Selecting Dual linear or logarithmic shape provides a swept source level in steps between defined start and end levels and back to the start level NOTE The number of points in a dual sweep refers to the total number of points from the start to the end and back to ...

Page 58: ...the pulse steady measurement period may be extended significantly to allow time for the DUT to cool sufficiently The measure delay shown in the following diagram shows a user defined measure delay alternatively an automatic settling delay can be selected see Timing options for more details The time it takes to complete one single sweep can be calculated by Number of Points x Settling Delay x 2 Swe...

Page 59: ...SV the points will be converted to voltage NOTE Due to the fact that a list can be imported into any mode with sourcing capability the instrument checks each level against the allowable limits given the mode and ranges selected to ensure each level is within the specified limits This is not done on import but upon running the output If a limit breach is detected a warning is generated and the outp...

Page 60: ...e Internal to import The file will appear in the Available Lists column with Internal as the location NOTE External USB Files cannot be loaded or deleted using the store setup menu Load a List from the Internal Memory To recall a List from the Internal Memory select the required list followed by Load A pop up box will appear to confirm the action NOTE Recalling any stored list will override the ex...

Page 61: ...pplied to the selected operating mode changing the mode of operation may also change the output off state Not all off states are available in each mode There are a total of 4 output off states that can be chosen from Open This is the only output state that completely isolates the external circuitry from the instrument In this state all of the terminals are made open circuit and no terminals are mo...

Page 62: ... terminal configuration slew rate high reactance state protection limits and range selection will all match the existing manual setup configuration One exception to this is that during the off condition the measurement period is set to 10PLC when off condition measurements are enabled CAUTION Always take special care and consideration when configuring the output off state This is especially true w...

Page 63: ...including output level load level voltage and current and load reactance The slew rate setting can be utilised to tame fast edges and help prevent instability High reactance mode When attempting to source into a highly reactive load which may be capacitive or inductive there may be visible overshoot ringing or even in some cases instability Enabling High Reactance mode helps to compensate for and ...

Page 64: ...s either disabled OFF or the output continues to keep sourcing the last set level with no further measurements made Constant level NOTE The constant level option can be particularly useful within sequence mode when it is desired that the output remains at the same level between steps and does not disable This is only possible if the Mode does not change between steps In this particular situation t...

Page 65: ...gs power and resistance also turn orange The limit is not latched and can recover if the source level is reduced or the load changes accordingly When manually selecting ranges the limit level can be set between 10 and 105 of the selected range The combination of the source and limit level settings cannot exceed the instruments maximum power of 25W Limits can be added depending on the mode of opera...

Page 66: ...ange to the settings in the selected mode There is also an integrated internal over temperature protection limit The instrument can overheat if the ambient temperature exceeds the recommended operating range limit stated in the specification or if the ventilation is restricted When these protection limits are exceeded the output is tripped and the off state is set to OPEN thus completely isolating...

Page 67: ...the source i e not MV or MC modes The level can be set and edited when the shape is configured as Steady or Pulse from either the Home screen or the Manual Setup menu When the output is enabled real time adjustments can be made from the Home screen see Live adjusting source and limits from the home screen However take note that in Steady shape changing the source value will update instantaneously ...

Page 68: ...ng an Auto Delay feature is included As opposed to defining an exact settling time delay the delay can be set to Auto This automatically delays the first measurement of the new source level until it appears that the output has settled to the desired level for each measurement This should be the most suitable and the default setting for most applications However If accurate repeatable timing is req...

Page 69: ...n be affected and reduced by power line induced AC noise this effect can be counteracted by increasing the measurement period however only an integer number of PLC values provide mains power line rejection One PLC for 50Hz is 20ms and one PLC for 60Hz is 16 67ms Mains input frequency is automatically monitored and applied by the instrument Matching and tracking the PLC measurement period to the ex...

Page 70: ...source setting to move onto the next level The input trigger can also be used to repeat shape waveforms in order to source the next waveform shape The global input trigger event can be provided by remote command using the command SYST em TRIG ger or from pin 8 on the DIO port Once the event has been triggered and all associated measurements to that event have been made the instrument sets a global...

Page 71: ...e sequence model to create a base for the additional actions To start creating a sequence either Insert position before or Add position after a step The sequenced model allows the user to run multiple configurations set delays repeat and jump to and from steps create multiple triggered events and set output statuses NOTE Each step must have a setup added only one configuration setup can be added t...

Page 72: ...8 Manual setup Sequence mode 71 SMU4000 Series Instruction Manual Once a setup has been added actions and conditions can be added to the sequence step ...

Page 73: ...setup and measured results the SMU constantly monitors activity for set conditions if a condition is met an action will be activated Up to three conditions can be applied to each step each condition is assigned a single action A condition can be set to the following Level Monitor for a set level V A W or Ω including or than a set level within two set levels or outside of two set levels Timeout Run...

Page 74: ...ment control must be set to Constant Level see Measure Control for more details NOTE When Measurement control is set to Constant Level Auto Store will not generate separate CSV files between steps measurement data from all steps in the sequence will be stored as a single file The off condition of the active step will be applied until the next step is shown as active It will change accordingly base...

Page 75: ...y be longer dependant on the length of the list If the list linked to the setup for the selected step is not located in the internal memory the step will fail and the sequence will be terminated The previous timings will be altered if a delay is applied as this value will be added on top of the time between cycles The output is switched on after the delay is applied DIO Logic Only valid pins will ...

Page 76: ... a delay has been added to the start of a sequence RUN is pressed and the RUN button LED will illuminate However the output will stay off until the delay has passed When running a sequence the active step will appear on the home screen The active step is also highlighted in the sequence model Any trip caused by OVP OCP OPP will cause the entire sequence to stop If a sequence is interrupted satisfi...

Page 77: ...ontain the step starting on 0 and the iteration or repeat starting on 1 If Auto Store is selected a CSV file containing the measurements for a single step is generated between steps NOTE If Measurement control is set to Constant Level Auto Store will not generate separate CSV files between steps Due to the nature of the sequence mode setups each step can be set to measure different measurement typ...

Page 78: ...triggered and all associated measurements to that event have been made the instrument sets a global trigger output on the DIO port This combination of global trigger in and trigger out allows for the handshaking of multiple instruments SMU Link adaptor Two SMUs can be linked together via the DIO terminals to perform simultaneously via a handshake triggering system effectively creating a fully func...

Page 79: ... the resting state is always high 4 7kohm pull up internal to 5V Pinout Pin Functionality 1 5V 500mA Fused 2 General DIO 3 General DIO 4 General DIO 5 General DIO 6 General DIO 7 Global Trigger Output 8 Global Trigger Input 9 HV Interlock 10 0V Additional 5V and 0V lines are provided for powering external control circuitry The 5V supply is internally fused resettable fuse to 500mA see the SMU4000 ...

Page 80: ...tions available are Deviation relative offset Displays measured results as a deviation or relative offset in relation to the specified reference point Measured results measurement reference Deviation Displays measurement results as a percentage deviation in relation to the specified reference point Measured results 100 x measurement reference reference When the measurement is less than the referen...

Page 81: ...nt selection for more details To enable a measurement type for tolerance sorting select Primary or Secondary and press On the button will now display Enabled The tolerance sorting can be disabled by pressing Off whilst the button is selected Limits Measurements made within the set upper and lower limits will display T PASS on the results screen If the measurement is above or below the set limit th...

Page 82: ...itance as much as possible Noise Pickup Due to their high resolution and numerous low level measurement ranges source measure units are very susceptible to noise pickup However there are many things that can be done to help reduce noise pickup issues Always set an integer number of PLCs for the measurement period Extend the measurement period as long as possible It s recommended to use at least 50...

Page 83: ...ly based upon the voltage limit set The voltage limit can be increased to reduce the amount of slew applied Current Limit To reduce the risk of limit overshoot the voltage source is slewed slightly based upon the current limit set The current limit can be increased to reduce the amount of slew applied Note that a greater slew is applied on limits 210mV i e the 200mV and 20mV ranges Load reactance ...

Page 84: ...wer across the majority of the voltage range NOTE The power is limited by the 3A current limit at absolute voltages 8 33V The output current is limited to 0 5A at absolute voltages 21V Absolute voltages above 21V are only achievable on the SMU4201 Maximum Voltage and Current capabilities SMU4001 SMU4201 0V to 20V Voltage Current 5V 3A 8V 3A 10V 2 5A 12V 2 08A 20V 1 25A SMU4201 21V to 200V Voltage ...

Page 85: ...the password to be entered NOTE The default password is 123456 Once entered correctly this password can be changed If the new password is forgotten a master password is available in the service guide available upon request Off No password protection applied to any settings HV LV Setting SMU4201 only Password protection applied to restrict access to voltages 42V via the High Voltage Interlock see H...

Page 86: ...isabled Default Slow Display will dim after 1 hour of inactivity Normal Display will dim after 20 minutes of inactivity Fast Display will dim after 5 minutes of inactivity Beeper Beeper will sound in specified scenarios On Beeper is active for key presses warning and notifications Errors Beeper is active for warnings only Off Beeper is disabled Default Environment Power Control The power to the in...

Page 87: ...www aimtti co uk support To update the firmware Download the latest version of the SMU firmware from the website This is compatible for both 4001 4201 models Unzip the compressed file In the extracted folder you will find another folder called UPDATE Copy the folder to the root of a FAT32 formatted USB flash drive Insert the USB flash drive in the SMU the top left icon will turn green Navigate to ...

Page 88: ...lecting the specified format button for either Date or Time The following formats are available 24 Hour clock Default 12 Hour clock DD MM YYYY Default MM DD YYYY YYYY MM DD NOTE The date format in an exported csv file will always be YYYY MM DD Recovery mode The recovery mode can be used in cases where a corrupted firmware update has been performed and or the unit cannot switch on in normal functio...

Page 89: ... this should only be done by skilled personnel in conjunction with the service guide which may be obtained directly from the Manufacturers or their agents Cleaning If the instrument requires cleaning use a cloth that is only lightly dampened with water or a mild detergent WARNING To avoid electric shock or damage to the instrument never allow water to get inside the case To avoid damage to the cas...

Page 90: ...tal remote interfaces This includes configuration options for LAN USB and GPIB where fitted This menu also provides the status information of any of the digital remote interfaces that are connected to the instrument For more information on Remote Interface configuration see SMU4000 Series Programming Manual available to download from www aimtti com support ...

Page 91: ...ation can be repeated when the meter has acclimatised by using the TEST key on the front panel NOTE It is recommended that the self test is performed after 1 hour warm up or before acquiring measurements for highly accurate tests Routine Calibration The Calibration menu provides access to all of the instrument calibration routines The external calibration routines require accurate measurement equi...

Page 92: ...ary Measurement Current Delay Auto Measurement Period 1PLC Voltage Range Auto Auto Minimum Voltage Range 20mV Current Range Auto Auto Minimum Current Range 200nA Off State 0V 100µA Off State Measurements Off Slew Rate Max High Reactance Off Measurement Control Off OCP Disabled OVP Disabled OPP Disabled Math None Sorting None Graph Type YT Graph Style Line X Axis Minimum Position 0 Seconds Y Axis M...

Page 93: ...ctory Default settings Routine Calibration 92 SMU4000 Series Instruction Manual System High Voltage Interlock LV Brightness 75 Auto Dim Off Beeper Off Power Control Manual On Off Air Vents Clear SMU4201 only ...

Page 94: ...SC Load Current LC Load Resistance LR Load Power LP Measure Voltage MV Measure Current MC Measure Resistance MR Measure High Resistance MHR Sequence Voltage Measurements all modes except MC Range Resolution Accuracy reading offset 20mV 10nV 0 06 rdg 50µV 200mV 100nV 0 015 rdg 50µV 2V 1uV 0 015 rdg 50µV 20V 10uV 0 02 rdg 5mV 200V 100uV 0 02 rdg 5mV 1 200V range only available on SMU4201 Current Mea...

Page 95: ...lated from measured Voltage and Current Resistance errors in Ohms may be calculated from respective voltage and current measurement results and specified errors as follows Current Voltage error Voltage Current error Current2 Where Voltage is the Voltage reading in Volts without polarity Voltage error is the specified Voltage measurement error in Volts Current is the Current reading in Amps without...

Page 96: ...µΩ 4 wire steady state Overshoot typical 0 5 1mV resistive load High Reactance Load Stability Disabled 0 to 0 2µF Enabled 0 2uF to 200µF typical inductive loading is also accommodated 4 Limits include 105 overrange Current Source or Load SC LC LR LP and MR modes Accuracy Same as current measurement accuracy Source Limit SC MR modes 3 15A LC mode 3 15A LR mode 100mΩ to 250MΩ LP mode 26 25W Maximum ...

Page 97: ...esolution Voltage Dropout load modes Accuracy same as voltage measurements 1 digit 5 digit Resolution 100µV fixed 5 Hysteresis 1mV minimum Only available in load modes LC LP LR Voltage range forced to auto in load modes SMU4001 User settable up to 21V SMU4201 User settable up to 210V Pulse Width User settable 200µs minimum with 10µs resolution Wideband Noise Voltage source SMU4001 2mV RMS 10Hz 20M...

Page 98: ...settable 10mV to 210V Over Power Protection OPP Bipolar protection limit with single setting User settable 1µW to 26 25W Accuracy same as power measurements 3 digits Or can be disabled 5 digit Resolution Over Temperature Protection OTP Internal Temperature safety trip Not user settable cannot be disabled Trip Delay typical 200us Trip Status Output is disabled off condition is set to OPEN Measureme...

Page 99: ... Output Levels Logic zero open drain MOS typically 0 2ohm 100mA maximum sink Logic one nominally 4 7kohm pull up to 5V Logic Active High Low global port selection Remote Control Interfaces LAN Ethernet 100 10 base T hardware connection LXI Conformance 1 5 LXI Device Specification 2016 USB Standard USB 2 0 hardware connection Operates as a virtual COM port GPIB optional Conforming with IEEE488 1 an...

Page 100: ...61326 1 and EN61326 2 1 group 1 class A Safety EN61010 1 and EN61010 2 030 uncategorized measurements MAIN and SENSE terminals rated for voltages up to 210V to ground and between terminals Front panel CHASSIS terminal intended for ground reference purposes only Security Kensington security slot incorporated Mechanical Size nominal Bench Use 250mm W x 97mm H x 295mm D Rack Mount 213 5mm W rack x 86...

Page 101: ...ACEABLE QUALITY SYSTEMS TTi is an ISO9001 registered company operating fully traceable quality systems for all processes from design through to final calibration ISO9001 2015 Certificate number FM 20695 WHERE TO BUY AIM TTI PRODUCTS Aim TTi products are widely available from a network of distributors and agents in more than sixty countries across the world To find your local distributor please vis...

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