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Applent Instruments AT381x User Manual

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User's Guide
Rev.A1
FIRMWARE REVISIONS
This manual applies directly
to instruments that have
the firmware Rev. A7.0
AT381x
LCR Meter
@Instruments
Applent Instruments Ltd
No.61-3, Baolong International,Chahua Road, Zhonglou
District ,Changzhou City, Jiangsu Province, China
[213014]
Tel: 0519-88805550 Fax: 0519-86922220
http://www.applent.com
Sales Email:
sales@applent.com
Tech Email:
tech@applent.com
©2005-2019 Applent Instruments Ltd.

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Summary of Contents for Applent Instruments AT381x

  • Page 1 LCR Meter to instruments that have the firmware Rev. A7.0 @Instruments Applent Instruments Ltd No.61-3, Baolong International,Chahua Road, Zhonglou District ,Changzhou City, Jiangsu Province, China [213014] Tel: 0519-88805550 Fax: 0519-86922220 http://www.applent.com Sales Email: sales@applent.com Tech Email: tech@applent.com ©2005-2019 Applent Instruments Ltd.

  • Page 2: Safety Summary

    WARNING DANGER: When you notice any of the following abnormal conditions, terminate operation immediately and disconnect the power cord. Contact Applent Instruments Sales for repair. Failure to do so may result in fire or potential electrical shock to operators. Instrument is operating abnormally.

  • Page 3: Certification, Limited Warranty, & Limitation Of Liability

    Contents CERTIFICATION, LIMITED WARRANTY, & LIMITATION OF LIABILITY Applent Instruments, Inc. （shortened form Applent）certifies that this product met its published specifications at the time of shipment from the factory. Applent further certifies that its calibration measurements are traceable to the People's Republic of China National Institute of Standards and Technology, to the extent allowed by the Institution's calibration facility or by the calibration facilities of other International Standards Organization members.

  • Page 4: Table Of Contents

    AT381x User's Guide Contents Safety Summary ......................................2 Safety Information ....................................2 CERTIFICATION, LIMITED WARRANTY, & LIMITATION OF LIABILITY..................3 Contents ........................................4 Figure Contents ...................................... 10 Table Contents ......................................12 Unpacking and Preparation ................................13 Packing List ..................................13 Power Requirements ................................ 13 Operating Environment ..............................
  • Page 5 Contents Connect to Device under Test (DUT) .......................... 22 [Meas] Page ....................................... 24 <MEAS DISPLAY> Page ..............................24 4.1.1 Measurement Function [FUNC] .......................... 24 4.1.2 Impedance Range [RANGE] ..........................26 4.1.3 Measurement Frequency [FREQ] ........................27 4.1.4 Trigger Mode [TRIG] ............................... 28 4.1.5 Test Signal Voltage Level [LEVEL] ........................
  • Page 6 AT381x User's Guide 5.4.4 Limit parameters [LMT] selection ........................48 5.4.5 Input [LOWER] and [UPPER] Limits Value ....................... 49 System Configurations ..................................50 <SYSTEM CONFIG> Page ............................... 50 6.1.1 System Language [LANGUAGE] ......................... 51 6.1.2 Setting the system date and time [DATE/TIME] ................... 51 6.1.3...
  • Page 7 Contents 10.5 Command Reference ............................... 69 10.6 DISPlay Subsystem ................................69 10.6.1 DISP:PAGE ................................... 70 10.6.2 DISP:LINE ..................................70 10.7 FUNCtion Subsystem ............................... 71 10.7.1 FUNCtion ..................................71 10.7.2 FUNCtion:IMPedance:AUTO ..........................71 10.7.3 FUNCtion:IMPedance:RANGe ..........................72 10.7.4 FUNCtion:DCR:RANGe ............................72 10.7.5 FUNCtion:RANGe:AUTO ............................
  • Page 8 AT381x User's Guide 10.14.5 CORRection:SPOT:SHORt ............................84 10.15 TRIGger Subsystem ................................85 10.15.1 TRIGger[:IMMediate] .............................. 85 10.15.2 TRIGger:SOURce ..............................85 10.15.3 TRIGger:DELAY ................................. 85 10.16 BIAS Subsystem ................................. 86 10.17 FILE Subsystem................................... 86 10.17.1 FILE?....................................86 10.17.2 FILE:SAVE ..................................86 10.17.3...
  • Page 9 Contents 12.3.5 Averaging Factor Register [3004H] ......................... 105 12.3.6 Trigger Mode Register [3005H] ........................106 12.3.7 Measurement Frequency Register [3006H-3007H] ................... 107 12.3.8 Level Register [3008H-3009H] .......................... 107 12.3.9 DCR Range Register [300AH] ..........................108 12.3.10 Startup File Recall Register [300CH] ....................... 108 12.3.11 Auto Save [300DH]..............................
  • Page 10 AT381x User's Guide 13.3.5 Capacitance C, loss D accuracy test ........................ 127 13.3.6 Inductance L accuracy test ..........................127 13.3.7 Impedance Z accuracy test ..........................127 Examples ....................................129 14.1 Basic Measurement Procedure ........................... 129 14.2 Example ....................................130 Specification ..................................132 15.1...
  • Page 11 Contents Fiture 11-3 Normal response frame ............................92 Figure 11-4 Abnormal response frame ............................ 92 Figure 11-5 Read Multiple Registers（0x03） ........................93 Figure 11-6 Read Multiple Registers（0x03）Response Frame ..................94 Figure 11-7 Writing to multiple registers（0x10）......................94 Figure 11-8 Write to Multiple Registers（0x03）Response Frame ................95 Figure 11-9 echo test（0x08）...
  • Page 12 AT381x User's Guide Table Contents Table 2-1 Series-parallel equivalent circuit ........................17 Table 2-2 AT381x Measurement display range ........................ 18 Table 2-3 Test signal accuracy ..............................19 Table 3-1 Front Panel Description ............................21 Table 4-1 The combinations of measurement parameters ..................25 Table 4-2 The combinations of monitor parameters ......................

  • Page 13: Unpacking And Preparation

    1. Check appearance of the product whether there is damage, scratches, etc.; 2. Check the instrument packing list if there are any missing items. If there is any damage or insufficient accessories, please contact Applent Instruments Sales or distributor immediately.
  • Page 14 AT381x User's Guide the AT381x internally. WARNING: Don't Use Organic Solvents (such as alcohol or gasoline) to clean the instrument.

  • Page 15: How To Remove The Handle

    Unpacking and Preparation How to Remove the Handle Instrument handle can be adjusted. Hold both sides of the handle with both hands, gently pull it to the sides, and then rotate the handle. The handle can be adjusted to four positions as shown below: Figure 1-1 Instrument handle (schematic, panel graphics do not match the actual)

  • Page 16: Overview

    Introduction Thank you for purchasing AT381X LCR meter. AT381X is precision LCR meter that uses a fully automated real-time inspection micro-desktop instrument controlled by high-performance 32-bit ARM microprocessor. The instrument can select any test frequency between 10Hz and 300 kHz, and can select test signal level between 0.01V and 2.00V with 0.01V steps.

  • Page 17: Measurement Function

    Overview Measurement Function 2.2.1 Measurement Parameters Measurement parameters：Cs-Rs, Cs-D, Cp-Rp, Cp-D, Lp-Rp, Lp-Q, Ls-Rs, Ls-Q, G-B, R-X, Z-θr, Z-θd 和 DCR。 Among them： L: Inductance C: Capacitance R: Resistance Z: Impedance X: Reactance B: Density G: Conductance D: Loss θ: Phase angle Q: Quality factor DCR：DC resistance The subscript s indicates serial equivalent, p indicates parallel equivalent...

  • Page 18: Range

    AT3818 0.05% AT3816A 0.05% AT3816B 0.1% AT3817A 0.05% AT3810A 0.05% AT3817D 0.1% Measurement Display Range Table 2-2 AT381x Measurement display range Parameter Measurement display range 0.00001nH ～ 9999.99H 0.00001pF ～ 999.999mF R、X、Z 0.00001Ω ～ 99.9999MΩ B、G 0.01nS ～ 999.999S 0.00001 ～ 9.99999 0.00001 ～...

  • Page 19: Test Signal Level

    Overview AT3816B： 50Hz～200kHz 37 points AT3817A: 50Hz～100kHz continuous test frequency AT3810A: 10Hz～20kHz continuous test frequency AT3817D: 50Hz～100kHz, 10 points Frequency accuracy：0.01% 2.3.2 Test Signal Level ACV：10.00mV~2.00V, Accuracy：10%，CV mode accuracy：6% ACI：100.0μA~20.00mA，Accuracy：10%，CC mode accuracy：6% @2Vmax DCR：±1VDC（2Vpp）square wave，3Hz Maximum 0.033A（Max） ，output impedance 30Ω 2.3.3 Constant Voltage Source Internal Resistance Can be set to 30Ω、50Ω...

  • Page 20: List Sweep

    AT381x User's Guide are high, LO: primary parameters are low, IN: primary parameters are qualified Comparison Method: • Absolute tolerance ±TOL sorting: The absolute deviation of measured value from nominal value is compared with the limit of each bin. Percentage tolerance %TOL sorting: The percentage deviation of measured value from nominal value is compared to the limit of each bin.

  • Page 21: Startup

    Startup 3. Startup In this chapter you will learn the following: Front panel – including the introduction of buttons and test terminals.  Rear panel – describes the power and interface information.  Power on—including poweron self-test process, instrument defaults, ...

  • Page 22: Rear Panel

    AT381x User's Guide Hpot high terminal - voltage side Lpot low terminal - voltage side Lcur low terminal - current side Numeric keypad Cursor key LCD Display 3.1.2 Rear Panel Figure 3-2 rear panel Power Cable Receptacle (Outlet) RS-232 interface...
  • Page 23 Startup Warning: Do not apply DC voltage or current to the test terminal, otherwise the instrument will be damaged. WARNING: If test a charged device, make sure that its charge is removed before measuring. • Test fixtures and cables: We recommend that users use our test fixtures or test cables, if using test fixtures or cables made by user or other company may result in incorrect measurements.

  • Page 24: Meas] Page

    Figure 4-1 <MEAS DISPLAY> Page 4.1.1 Measurement Function [FUNC] AT381x simultaneously measures four components of the complex impedance (parameters) in a measurement cycle. These include primary parameter, secondary parameter and two monitor parameters.
  • Page 25 [Meas] Page The monitor parameters need to be set in [Setup] page. Note: The monitor parameters are initially set to OFF. ■ Types of measurement parameters: Table 4-1 The combinations of measurement parameters Cs-Rs Cs-D Cp-Rp Cp-D Lp-Rp Lp-Q Ls-Rs Ls-Q Rs-Q Rp-Q...

  • Page 26: Impedance Range [Range]

    Test speed Users need Range a fixed impedance range fastest. participate range selection Nominal AT381x sets the optimum range The best way for sort Valid only in the Range depending nominal test. Speed is the sorting mode. value. fastest. Available impedance range：...

  • Page 27: Measurement Frequency [Freq]

    50Hz～200kHz 37 points AT3817A: 50Hz～100kHz continuous test frequency AT3810A: 10Hz～20kHz continuous test frequency AT3817D: 50Hz～100kHz, 10 points Table 4-6 AT381x frequency resolution Frequency range(F) Resolution 10.0000Hz ≤ F ≤ 99.9999Hz 0.0001Hz 100.0000Hz ≤ F ≤ 999.999Hz 0.001Hz 1.00000kHz ≤ F ≤ 9.99999kHz 0.01Hz...

  • Page 28: Trigger Mode [Trig]

    AT381x User's Guide 10Hz 50Hz 60Hz 100Hz 120Hz 1kHz 10kHz 20kHz 4.1.4 Trigger Mode [TRIG] The instrument has 4 trigger modes: Internal trigger, manual trigger, external trigger and remote trigger. Trigger Mode Description Also called continuous test, the trigger signal is continuously tested by the internal period of the instrument according to the inherent period.

  • Page 29: Measurement Speed [Speed]

    [Meas] Page ALC ON Turn Auto Level Control ON ALC OFF Turn Auto Level Control OFF The most commonly used level list  Table 4-11 The most commonly used level list INCR +/ DECR -（V） 0.01 0.10 0.30 0.50 1.00 1.50 2.00 INCR +/ DECR -（A）...

  • Page 30: Bin Meas> Page

    AT381x User's Guide Soft key Function START LOG Start a new measurement data record Step 4 Press [START LOG] soft key to start recording data to internal buffer of the instrument. Options after the start of recording Soft key Function STOP The current record is stopped.

  • Page 31: Comparator Function On/Off [Comp]

    [Meas] Page Comparator results are displayed here using large characters, primary and secondary test results are displayed in this area as small characters. In the lower half of the screen, some settings related to comparator are displayed in this area. 4.2.1 Comparator Function ON/Off [COMP] The built-in comparator can sort devices into 9 sets of primary parameters and 1 set of...

  • Page 32: Auxiliary Bin [Aux] On/Off

    AT381x User's Guide 4.2.2 Auxiliary Bin [AUX] ON/OFF If you don't need to sort secondary parameters, the auxiliary bin (AUX) can be turned off. After being turned off, the secondary parameter limit will not be determined during the measurement. Procedure for turning on/off auxiliary bin: ...

  • Page 33: List Sweep> Page

    [Meas] Page Soft key Function COUNT ON COUNT OFF RESET COUNT All counts are reset to 0 <LIST SWEEP> Page The <LIST SWEEP> page will display when you press the [Meas] key and [LIST SWEEP] soft key. Figure 4-5 <LIST SWEEP> page <List Sweep>...

  • Page 34: Sweep [Mode] Setting

    AT381x User's Guide Figure 4-6 Sweep Mode 4.4.2 Sweep [MODE] Setting The <List Sweep> page completes the scan frequency or level value test of up to 10 list points. When the test [Method] is set to sequence and [TRIG] is set to manual, the sweep function will automatically execute each test step on the list in sequence until the last step.
  • Page 35 [Meas] Page ■ To enter Measure Full Screen Display page： Step 1 Press the [Meas] key; Step 2 Press the bottom soft key [ENLARGE] to switch to <ENLARGE DISPLAY> page ■ To return back to the normal display page Step 1 Press [NORMAL] bottom soft key to return back to the <MEAS DISPLAY>...

  • Page 36: Setup] Key

    AT381x User's Guide 5. [Setup] Key In this chapter users will learn about all the setup features: MEAS SETUP page • CORRECTION page • BIN TABLE page (Comparator setup) • • LIST TABLE page You can press the [Setup] key to open the <MEAS SETUP> page.

  • Page 37: Source Output Impedance [Src Res]

    [Setup] Key 5.1.1 Source Output Impedance [SRC RES] The source internal resistance is also called the output impedance. The Source output impedance can be set to 30Ω, 50Ω or 100Ω. After the test level Vs is set, the test current is flowing through the device under test (DUT) will be determined by the impedance Zx=Rx+jXx of the DUT and the source internal resistance Rs, namely: Since some measured components such as high-permeability magnetic core inductors will...

  • Page 38: Dc Bias Voltage [Bias]

    The Auto LCZ Function will be turned off after users reset the measurement function. 5.1.5 Monitor 1 and Monitor 2 [MON 1] [MON 2] Parameter Selection The AT381x can monitor the other two parameters. Additional monitoring parameters do not increase instrument processing time. The instrument defaults to "Off".

  • Page 39: Measurement [Delay]

    [Setup] Key Step 2. Use the cursor key to select [MON 1] or [MON 2] field Step 3. Use the soft keys to choose a parameter Soft key Function Turn off the monitor Absolute value of impedance Dissipation factor Quality factor(=1/D) Test signal Voltage Test signal Current ∆...

  • Page 40: Correction> Page

    AT381x User's Guide <CORRECTION> Page When you press [Setup] key and [CORRECTION] soft key, the <CORRECTION> page appears. In this page, the OPEN/SHORT for correcting the stray admittance and residual impedances can be performed. In order to achieve the accuracy specified by the technical specifications, open circuit clear zero and short circuit clear zero are necessary.

  • Page 41: Short Correction [Short]

    5.2.2 Short Correction [SHORT] The short correction feature of the AT381x compensates for any residual impedances (R,X) that may exist within the interval from the calibration plane, which is determined by the selected cable length, to the DUT connecting points. (See Figure 5-4)

  • Page 42: Frequency Spot 1, 2, 3 Correction [Spot 1] [Spot 2] [Spot]

    In addition, the comparator has a bin count function that counts up to 999,999 DUTs. To take full advantage of the comparator, AT381x was equipped a handler interface for use in conjunction with the comparator, all of these bins signal can output to yours PLC via the handler interface.

  • Page 43: Measurement Function [Func]

    5.3.2 Comparator Function ON/OFF [COMP] AT381x's built-in comparator can sort devices into a maximum of 10 bins (BIN1 to BIN9 and OUT OF BIN) using a maximum of nine pairs of primary parameter limits and one pair of secondary parameter limits. In addition, a device which primary parameter is within limits, but secondary parameter is not, can be sorted into an auxiliary bin (AUX).

  • Page 44: Compare【Mode

    AT381x User's Guide 5.3.3 Compare【Mode】 The compare mode is only for the primary parameters. There are three compare modes for the built-in comparators: Absolute value ∆  Relative value ∆%  Direct reading value SEQ  Absolute value ∆ and relative value ∆% mode: ...

  • Page 45: Nominal Value For Tolerance Mode [Nom]

    [Setup] Key ● Includes this point ○ Excludes this point In sequential mode, the comparison uses the direct reading measurement value to compare with the upper and lower limit ranges of the bin. The nominal value does not need to participate in operation.

  • Page 46: Beep】Feature

    5.3.8 Lower and Upper Limits Setup AT381x's built-in comparator can sort DUTs into a maximum 10 bins using up to nine sets of primary parameter limits alone with one set of secondary parameter limits. Please enter the absolute value of the primary parameter for the "absolute value (∆)"...

  • Page 47: List Table> Page

    Press the [Setup] key and press [LIST TABLE] soft key to open the <LIST TABLE> page. The list sweep feature of AT381x can perform automatic or manual sweep measurement by sweeping the frequency, signal level through a maximum 10 groups of frequencies or levels.

  • Page 48: List Sweep Parameters Setup

    Uses voltage as the list sweep parameter 5.4.3 Configure the Sweep Points AT381x's List sweep measurement feature supports up to 10 sweep points as well as measurement limit values. Each of sweep point can be turned on or off. To configure the sweep points Step 1 Enter the [LIST TABLE] page.

  • Page 49: Input [Lower] And [Upper] Limits Value

    [Setup] Key Step 3 Use the soft keys to select Soft key Function Primary parameter [A] Uses the primary parameter as the comparison parameter Secondary parameter [B] Uses secondary parameter as comparison parameter Not compare [-] Do not compare 5.4.5 Input [LOWER] and [UPPER] Limits Value Each sweeping point has a set of upper and lower limits, which may be a sequential range of the primary parameter A or the secondary parameter B.

  • Page 50: System Configurations

    [DATA BUFFER] – Set the maximum cache value for the data logging function  [DEFAULT SET] - Restore to factory settings  All settings in <SYSTEM CONFIG> page will be automatically saved in the system and will be automatically loaded next time when AT381x is turned on. Figure 6-1 <SYSTEM CONFIG> Page...

  • Page 51: System Language [Language]

    System Configurations 6.1.1 System Language [LANGUAGE] Two languages (ENGLISH and CHINESE) were supported by AT381x. To change languages  Step 1 Press the [Meas] or [Setup key] and then press [SYSTEM] TO enter <SYSTEM CONFIG> page Step 2 Use the cursor key to select [LANGUAGE] field Step 3 Use the soft keys to select a language you understand.

  • Page 52: Key Beep Setting [Key Beep]

    RS-232 interface, the instrument immediately communicates with the host at the set baud rate, and the keyboard is locked. Before you can control the AT381x by issuing RS-232 commands from built-in RS-232 controller connected via its DB-9 connector, you have to configure the RS-232 baud rate. If host computer and the instrument's baud rate is different, it will not be able to communicate correctly.

  • Page 53: Communication Protocol Settings [Protocol]

    RTU, Binary transmission 6.1.8 SCPI [TERMINATOR] Setting The AT381x supports multiple terminators: LF （ASCII： 0x0A） ， CR （ASCII： 0x0D） ,CR+LF(ASCII: 0x0D 0x0A)。 The host data received by the instrument may not use the terminator, and the data sent by the instrument to the host will always end with the specified terminator.

  • Page 54: Scpi [Handshake] On/Off

    6.1.10 SCPI [ERROR CODE] ON/OFF When the error code is turned on, the AT381x will return the execution result of each instruction to the host. When the instruction is a query, the execution will return the result of the query correctly, and the execution error will return an error code.

  • Page 55: Scpi [Result] Setting

    6.1.12 [DATA BUFFER] Set the maximum data buffer value for the data logging function. The AT381x can set up to 10000 sets of buffer data. After the cache setting value is reached, the data record will stop. This data can be saved into the external USB disk.

  • Page 56: File Operation

    7. File Operation This chapter provides information on the file operation of the AT381x. The AT381x has built-in non-volatile memory, users can save system configuration data and user data in this memory. The system's built-in memory can save 10 configuration files.

  • Page 57: Recall A File At Startup [Auto Recall]

    File Operation Soft key Function INT MEMORY Internal flash memory USB storage MEMORY 7.1.2 Recall a File at Startup [AUTO RECALL] Users can recall file 0 or current file at the instrument starts up by setting the [AUTO RECALL] field. To select auto recall file Step 1 Press the [Meas] or [Setup] key followed by [FILE] soft key at bottom and then enter <FILE>...

  • Page 58: Handler Interface

    IDX (AD conversion end signal), EOM (test completion signal), TRIG (external trigger start) input, comparator record number input signal, etc. Through this interface, the AT381x can easily perform automatic control functions with user system control components. Pin Assignment...

  • Page 59: How To Connection

    Handler Interface O_S_OVER Secondary parameter output Active low , (NG) AUX function is turned on O_P_OVER Primary parameter output Active low (NG) O_P_HI Main measuring output (over Active low higher limit) O_P_LO Main measuring output (over Active low lower limit) O_NG BUS output (NG) Active low...

  • Page 60: Timing Chart

    GN D Maximum source current：5mA Maximum reverse current：50mA Timing Chart Recommended signal input and output timing chart  The AT381x completes one sampling and is completely controlled by an external device (PLC, etc.). Figure 8-4 Signal timing chart Table 8-4 Timing...
  • Page 61 Handler Interface Time Description Minimum Trigger pulse width Measurement Trigger delay time <10μs cycle ADC time （Related to measurement speed） Operation time Comparator result delay time 200μs Await next trigger 0μs...

  • Page 62: Remote Control

     About SCPI  AT381x can use the RS-232 interface to communicate with the computer to complete all the instrument functions. With standard SCPI commands, users can also easily create a variety of acquisition systems that are suitable for them.

  • Page 63: How To Connect

    Remote Control Recommendation: To avoid electrical shock, turn off the AT381x when connect or disconnect the connector. AT381x default communication settings:  Transmission method: Full-duplex asynchronous communication with start and stop bits Data bits: 8-bit Stop bits: 1-bit Parity: none 9.1.2...

  • Page 64: Modbus (Rtu) Protocol

    AT381x User's Guide follows: CONFigure. In use, you can write a full name, or just write an abbreviation that only contains uppercase letters. The instrument's feedback to the query command is also ASCII code. In fact, for simple applications (such as PLC), you only need to translate the commands into HEX bytes and then transfer them in bytes.

  • Page 65: 10. Scpi Command Reference

    10.1 Handshake Protocol Since the AT381x uses the minimum subset of the RS-232 standard and does not use hardware handshaking signals, the AT381x can use software handshaking in order to reduce possible data loss or data errors in communication. High-level language software engineers...

  • Page 66: Terminator

    The terminator can be selected in the system configuration page, and the instrument defaults is LF. Note: The AT381x allows the command sent by the host without the terminator, but it is  recommended to add the terminator at the end of the command. Otherwise, it will cause a timeout wait after each command is received (the command timeout is 10ms~50ms depending on the baud rate).

  • Page 67: Header And Parameters

    SCPI Command Reference commands in this manual. So the lower level commands are legal only when the subsystem commands have been selected. A colon (:) is used to separate the higher level commands and the lower level commands. Figure 10-1 Command Tree Structure ROOT Example...

  • Page 68: Separator

    10.4.4 Error Code The AT381x temporarily stores the result of the processing of each received command in the buffer. Before the next command is sent, the status can be acquired by the ERR? Command. If the error code function is turned on in [SYSTEM CONFIG] page, the instrument will automatically return the processing result after processing the command.

  • Page 69: Command Reference

    SCPI Command Reference *E07 INVALID MULTIPLIER Invalid multiplier *E08 BAD NUMERIC DATA Value error *E09 VALUE TOO LONG The value is too long, the numeric parameter exceeds 20 bytes *E10 INVALID COMMAND Invalid command, the command is invalid under certain conditions *E11 UNKNOWN ERROR Other unknown errors except the above...

  • Page 70: Disp:page

    AT381x User's Guide DISP :PAGE MEASurement(MEAS) ENLARGEMEAS(ENME) BINMEAS (BINM,BNUM) BINCOUNT (BCO) LISTMEAS (LIST) SETUP (MSET) CORRECTION (CSET) BINSETUP (BSET) LISTSETUP (LSET) CATalog(FILE) SYSTem(SYST) SYSTEMINFO (SINF) :LINE “<string>” 10.6.1 DISP:PAGE The :PAGE command sets the display page. The :PAGE? Query returns the abbreviated page name currently displayed on the LCD screen.

  • Page 71: Function Subsystem

    SCPI Command Reference 10.7 FUNCtion Subsystem The FUNCtion subsystem command group sets the measurement function, the measurement range, monitors parameter control. Figure 10-2 FUNCtion Subsystem Tree FUNCtion {Cs-Rs,Cs-D, Cp-Rp,Cp-D, Lp-Rp,Lp-Q, Ls-Rs,Ls-Q, R-Q,R-X, Z-thr(Z-θr),Z-Thd(Z-θd) Z-D,Z-Q, DCR} :IMPedance :AUTO {on,off,1,0} :RANGe <integer> :DCR :AUTO {on,off,nom}...

  • Page 72: Function:impedance:range

    AT381x User's Guide Example SEND> FUNC:IMP:AUTO ON Query Syntax FUNC:IMPedance:AUTO? Query Response {on,off} Example SEND> FUNC:IMP:AUTO? RET> 10.7.3 FUNCtion:IMPedance:RANGe The FUNCtion:IMPedance:RANGe command sets the impedance's measurement range. Command Syntax FUNC:IMPedance:RANGe <0-8,MIN,MAX> Parameter Where, <0-8,MIN, MAX> is: 0-8, The range number...

  • Page 73: Frequency Subsystem

    SCPI Command Reference Example SEND> FUNC:MON1 Z Query Syntax FUNC:MON1? FUNC:MON2? Query Response {off, Z, D, Q, THR, THD, R, X, G, B, Y, ABS, PER VAC, IAC} Example SEND> FUNC:MON1? RET> 10.8 FREQuency Subsystem The FREQuency command sets the oscillator frequency. The FREQuency? Query returns the current test frequency setting.

  • Page 74: Level:voltage (=Voltage[:Level])

    AT381x User's Guide 10.9.1 LEVel:VOLTage (=VOLTage[:LEVel]) The LEVel:VOLTage or VOLTage[:LEVel] command sets the oscillator's output voltage level. Command Syntax LEVel:VOLTage {<value>,MIN,MAX} or VOLTage:LEVel {<value>,MIN,MAX} Parameter Where, <value> is the numeric data (NR1, NR2 or NR3). MIN Sets to the minimum value of voltage...

  • Page 75: Level:alc (=Amplitude:alc)

    SCPI Command Reference Note The suffix unit Ω can't be used with this command. This command CANNOT be used in LIST SWEEP DISPLAY page and CORRECTION page. 10.9.4 LEVel:ALC (=AMPlitude:ALC) The LEVel:ALC or AMPlitude:ALC command enables the Automatic Level Control (ALC). Command Syntax LEVel:ALC {on,1,off,0} AMPlitude:ALC {on,1,off,0}...

  • Page 76: Aperture:avg

    AT381x User's Guide Example SEND> APER:RATE? RET> slow 10.10.2 APERture:AVG? The APERture:AVG? query returns the averaging rate settings. Query Syntax APER:AVG? Query Response <NR1> Integer (0 to 256) Example SEND> APER:AVG? RET> 10.11 FETCh Subsystem The FETCh subsystem command group is a sensor-only command which retrieves the measurement data taken by measurement(s) initiated by a trigger, and places the data into the output buffer.

  • Page 77: Fetch:monitor1? /2

    SCPI Command Reference Query Syntax FETCh:MAIN? Query Response <NR3:primary value>,<NR3:secondary value> Example SEND> FETC:MAIN? RET> +2.021009e-11,+1.644222e-01//LCR Primary ,Secondary RET> +1.23434e+05//DCR 10.11.4 FETCh:MONitor1? /2? The FETCh:MONitor1? and FETCh:MONitor2 set the latest measurement data of the moniter1 and moniter2 parameters into the output buffer. Query Syntax FETCh:MONitor1? and FETCh:MONitor2? Query Response...

  • Page 78: Comparator:state

    AT381x User's Guide :STATe COMParator {ON,OFF} :MODE {ABS,PER,SEQ} :AUX {ON,OFF} :BINS {1 to 9} :TOLerance :NOMinal <value> :BIN <n,low,high> :SECONDARY(SLIM) <low>,<high> :BEEP {OFF,PASS,FAIL} :OPEN {OFF,2,5,10,20,50} 10.12.1 COMParator:STATe The COMParator:STATe command sets the comparator function to ON or OFF. Command Syntax...

  • Page 79: Comparator:aux

    SCPI Command Reference 10.12.3 COMParator:AUX The COMParator:AUX command sets the auxiliary BIN counting function of the comparator to ON or OFF. Command Syntax COMParator:AUX {ON,OFF,1,0} Parameter Where,{ON,OFF,1,0} is: ON or 1 Set the AUX BIN to ON OFF or 0 Set the AUX BIN to OFF Example SEND>...

  • Page 80: Comparator:slim

    AT381x User's Guide Query Syntax COMParator:TOLerance:BIN? <n> Parameter Where,<n> is: NR1 (1 to 9): Bin number Query Response <NR3:low limit>,<NR3:high limit> Example SEND> COMP:TOL:BIN? 2 RET> 1.000000e-06,2.000000E-6 10.12.7 COMParator:SLIM The COMParator:SLIM or COMParator:secondary command sets the LOW/HIGH limit values for the secondary parameter.

  • Page 81: List Subsystem

    SCPI Command Reference 10.13 LIST Subsystem The LIST or SWEEP Subsystem command group sets the List Sweep measurement function, including the sweep point setting and limit values for the limit function. Figure 10-8 LIST Subsystem Command Tree :PARAmeter LIST {FREQ,VOLT,CURR} :STAT <n>,{ON,OFF} :BAND...

  • Page 82: Correction Subsystem

    AT381x User's Guide Command Syntax LIST:BAND <n>,<point value>,{A,B,OFF},<low>,<high> Parameter Where, <n>,<point value>,{A,B,OFF},<low>,<high> is: NR1(1 to 10): List sweep point <point value> sweep point value (frequency value or signal level voltage value) Uses the primary parameter as the limit parameter. Uses the secondary parameter as the limit parameter.

  • Page 83: Correction:open

    SCPI Command Reference :OPEN :STATe CORRection {ON,OFF} :SHORt :STATe {ON,OFF} :SPOT :STATe {ON,OFF} :FREQuency <n>,<value> :OPEN <n> :SHORt <n> :LOAD <n> :STANdard <n>,<REF.A>,<REF.B> 10.14.1 CORRection:OPEN The CORRection:OPEN command execute all presetted OPEN correction data measurement points. Command Syntax CORRection:OPEN Example SEND>...

  • Page 84: Correction:short

    AT381x User's Guide 10.14.2 CORRection:SHORt The CORRection:SHORt command execute all presetted SHORT correction data measurement points. Command Syntax CORRection:SHORt Example SEND> CORRection:SHOR RET> short 10.14.2.1 CORRection:SHORt:STATe The CORRection:SHORt:STATe command sets the SHORT correction function to ON or OFF. Command Syntax...

  • Page 85: Trigger Subsystem

    SCPI Command Reference 10.15 TRIGger Subsystem The TRIGger subsystem command group is used to enable a measurement or a sweep measurement, and to set the trigger mode. Figure 10-10 TRIGger Subsystem Command Tree [:IMMediate] TRIGger :SOURce {INT,MAN,EXT,BUS} :DELAY(DLY) <float value>,min,max 10.15.1 TRIGger[:IMMediate] The TRIGger:IMMediate command causes the trigger to execute a measurement or a sweep...

  • Page 86: Bias Subsystem

    AT381x User's Guide TRIGger:DLY? Query Response {0.000s~60.00s} Example SEND> TRIG:DLY? RET> 1.000s 10.16 BIAS Subsystem The BIAS subsystem command group sets the DC BIAS switch to ON or OFF, and sets the DC bias voltage value. Figure 10-11 BIAS Subsystem Command Tree BIAS {<-2.5V to +2.5V>,...

  • Page 87: File:load

    SCPI Command Reference Command Syntax FILE:SAVE <File No.> Parameter Where, <File No.> is: NR1 (0 to 9) Example SEND> FILE:SAVE 0 10.17.3 FILE:LOAD The FILE:LOAD command recalls all user settings from current used file. Command Syntax FILE:LOAD Example SEND> FILE:LOAD The FILE:LOAD <n>...

  • Page 88: System:keylock

    AT381x User's Guide Example SEND> SYST:CODE ON Query Syntax SYSTem:CODE? Query Response {on,off} Example SEND> SYST:CODE? RET> 10.19.3 SYSTem:KEYLock SYSTem:KEYLock command unlocks the keypad. Command Syntax SYST:KEYLOCK OFF or UNLOCK(UNLK) Example SEND> UNLOCK 10.19.4 SYSTem:RESult SYSTem:RESult command selects the test results send mode.

  • Page 89: Rcl

    SCPI Command Reference 10.20.4 *RCL *RCL = FILE:LOAD The *RCL command recalls all user settings from current used file. Command Syntax *RCL Example SEND> *RCL...

  • Page 90: 11. Modbus（Rtu）Protocol

    AT381x User's Guide 11. Modbus（RTU）Protocol This chapter include the following information: Data format – About the Modbus communication format.  Function  Variable Area  Function Code  11.1 Data Format We follow the Modbus (RTU) communication protocol, the instrument will respond to commands of the host computer and return the standard response frame.

  • Page 91: Crc-16 Calculation Method

    Modbus（RTU）Protocol get the CRC16 check code At least 3.5 character time squelch interval is requested 11.1.2 CRC-16 Calculation Method Set the initial value of the CRC-16 register to 0xFFFF. Perform XOR calculation fo CRC-16 register and information of the first byte, then it return the result to the CRC register.

  • Page 92: Response Frame

    AT381x User's Guide 11.1.3 Response Frame Unless it is a command broadcast by 00H station address, the other station address will return a response frame by the AT381x. Fiture 11-3 Normal response frame Figure 11-4 Abnormal response frame Table 11-2...

  • Page 93: Error Code

    Modbus（RTU）Protocol digit of 8, and the received digits are less than 8 or greater than 8 bytes. 5. When the station address is 0x00, it represents the broadcast address, the AT381x does not respond. 11.1.5 Error Code Table 11-3 Description for Error Code...

  • Page 94: Writing To Multiple Registers

    AT381x User's Guide The function code for reading multiple registers is 0x03. Table 11-5 Read Multiple Registers Name Name Description Station address When there is no RS485 address specified, the default is 01. 0x03 Function code Starting address Register start address, please refer to the Modbus...

  • Page 95: Echo Test

    Modbus（RTU）Protocol command set Number of write The number of registers read continuously. Please registers refer to the Modbus command set to ensure that 0001~0068（104） these register addresses arevalid, otherwise an error frame will be returned. Number of bytes = number of registers x 2 CRC-16 Data Figure 11-8...
  • Page 96 AT381x User's Guide Test data Any value: for example 12 34 CRC-16 Check code Example： Assume that the test data is 0x1234：...

  • Page 97: 12. Modbus（Rtu）Command

    Unless special stated, the values of the command and response frames in the following Note instructions are all hexadecimal data. 12.1 Register Overview The following is a list of all register addresses used by the AT381x. Any address not in the table will return error code 0x02. Table 12-1 Register Overview Register...
  • Page 98 AT381x User's Guide 0008 Rs-Q 0009 Rp-Q 000A 000B 000C 000D 000E 000F 3001 LCR range No. 0000~0008 Read and write registers, 2-byte integer 3002 Range mode 0000：Manual Read and write registers, 2-byte 0001：Auto integer 0002：Nominal 3003 Test speed 0000：Slow Read and write registers, 2-byte 0001：Medium1...
  • Page 99 Modbus（RTU）Command 3101 Comparator mode 0000：ABS Read and write registers, 2-byte 0001：PER integer 0002：SEQ 3102 Secondary parameter comparison 0000: Secondary Read and write registers, 2-byte on/off parameter comparison integer 0001 ： Secondary parameter comparison 3103 Bin count 0001~0009 Read and write registers, 2-byte Bin count 1~9bin integer 3104...
  • Page 100 AT381x User's Guide 3128 Primary parameter BIN7 lower 4-byte floating point Read and write registers, data limit value number occupies 2 registers 312A Primary parameter BIN7 higher 4-byte floating point Read and write registers, data limit value number occupies 2 registers...

  • Page 101: Fetch Measurement Data

    1 register 0003：Point frequency 3 Read： 0000 correction success FFFF correction fail 12.2 Fetch Measurement Data 12.2.1 Fetch measurement data [2000H-2003H] Register 2000~2003 is used for fetching measurement data of the AT381x Command： 2000 0002 CRC-16 passive read register number of...

  • Page 102: Fetch Comparator Results [2004H]

    AT381x User's Guide passive read register number of check code station registers Response: byte single precision floating point CRC-16 number Among them, B4~B6 is measurement data：501502F9 stands for 1E10（Low position in front） 12.2.2 Fetch Comparator Results [2004H] Register 2004 records voltage and resistance comparator results 16-bit storage domain: Among them：...

  • Page 103: Parameter Setting

    Modbus（RTU）Command 12.3 Parameter Setting 12.3.1 Function Register [3000H] Write  write register number of byte data registers Response: register number of registers Read  read register number of registers Response: byte data Data values： Data Function 0000 Cs-Rs 0001 Cs-D 0002 Cp-Rp 0003...

  • Page 104: Range Mode Register [3002H]

    AT381x User's Guide write register number of byte data registers Response: register number of registers Read  read register number of registers Response: byte data Data values： Data Function Description 0000 Range 0 100kΩ 0001 Range 1 30kΩ 0002 Range 2 10kΩ...

  • Page 105: Measurement Speed Register [3003H]

    Modbus（RTU）Command read register number of registers Response: byte data Data values： Data Function Description 0000 Manual range 0001 Auto range 0002 Nominal Select range based on nominal value 12.3.4 Measurement Speed Register [3003H] Write  write register number of byte data registers Response:...

  • Page 106: Trigger Mode Register [3005H]

    AT381x User's Guide write register number of byte data registers Response: register number of registers Read  read register number of registers Response: byte data Data values： Data Function Description 0001~0100 average value average value 0=average 0~256 value 1 12.3.6...

  • Page 107: Measurement Frequency Register [3006H-3007H]

    Modbus（RTU）Command 0000 Internal trigger 0001 Manual trigger Use Trigger key 0002 External trigger Handler trigger 0003 Remote trigger SCPI trigger 12.3.7 Measurement Frequency Register [3006H-3007H] Write [1kHz: 1000 = 44 7A 00 00]  8~11 44 7A 00 00 write register number of byte...

  • Page 108: Dcr Range Register [300Ah]

    AT381x User's Guide 3F 80 00 00 byte data Note: The following situations will return an error Test Condition Description <CORRECTION> Error in operation page <List Sweep> page Error in operation Level is current state Error in operation Function：DCR Error in operation 12.3.9...

  • Page 109: Auto Save [300Dh]

    Modbus（RTU）Command write register number of byte data registers Response: register number of registers Read  read register number of registers Response: byte data Data values： Data Function Description 0000 File 0 Default setting 0001 Current file 12.3.11 Auto Save [300DH] Write ...

  • Page 110: System Language Setting [300Eh]

    AT381x User's Guide Data values： Data Function Description 0000 Default setting 0001 12.3.12 System Language Setting [300EH] Write  write register number of byte data registers Response: register number of registers Read  read register number of registers Response: byte data Data values：...

  • Page 111: Dc Bias Register [3012H-3013H]

    Modbus（RTU）Command <LIST SWEEP> page Error in operation Function：DCR Error in operation Level value exceeds Data error specification value Read  read register number of registers Response: 3A 83 12 6F byte data 1mA Note: The following situations will return an error Test Condition Description <CORRECTION>...

  • Page 112: Comparator Setting

    AT381x User's Guide 12.4 Comparator Setting The comparator parameter register address starts at 3100. 12.4.1 Comparator Status Register [3100H] Write  write register number of byte data registers Response: register number of registers Read  read register number of registers...

  • Page 113: Secondary Comparator (Aux) On/Off Register [3102H]

    Modbus（RTU）Command registers Response: byte data Data values： Data Function Description 0000 ABS compare Absolute deviation comparison 0001 PER compare Percent deviation comparison 0002 SEQ compare Sequential comparison 12.4.3 Secondary Comparator (AUX) ON/OFF Register [3102H] Write  write register number of byte data registers...

  • Page 114: Beep Register [3104H]

    AT381x User's Guide write register number of byte data registers Response: register number of registers Read  read register number of registers Response: byte data Data values： Data Function Description 0000 Invalid 0001~0009 Bin count 12.4.5 Beep Register [3104H] Write ...

  • Page 115: Nominal Value Register [310Ah-310Bh]

    Modbus（RTU）Command 0001 PASS OK beep 0002 FAIL NG beep 12.4.6 Nominal Value Register [310AH-310BH] The primary parameter nominal value uses 2 registers, 310A and 310B. Please note that reading 310B alone is invalid. Write  100E-9 (Single precision floating point number：33D6BF95) write register number of...

  • Page 116: Primary Parameter Limit Value Register [3110H-3133H]

    Meanwhile, the specified file data can also be recalled into the setup register. 12.5.1 Save to Current File [4000H] Send a value of 0001 to 4000 registers, the AT381x will perform a file write operation, and all settings will be saved to the current file. This register cannot be read.

  • Page 117: Save To Specified File [4008H]

    Function Description 0000~0009 File 0~9 12.5.3 Reloading the Current File [4010H] The fixed value 0001 to 4010 registers are sent and the AT381x loads the current file data into the system. This register cannot be read. Write  write register...

  • Page 118: Correction

    Response： register number of registers Error response: The file is empty and the AT381x will respond with an error code: 04 Error code Data values： Data Function Description 0000~0009 File 0~9 12.6 Correction 12.6.1...

  • Page 119: Full-Frequency Short-Circuit Correction [5008H]

    12.6.2 Full-frequency Short-circuit Correction [5008H] Writing 0001 to Register 5008 will cause the AT381x to begin an open-circuit full-frequency correction. Since the correction process takes a few seconds, during this time, any write operation will be ignored and only the read operation will be open.

  • Page 120: Spot Frequency Correction Setting [5010H-5015H]

    12.6.4 Spot Frequency Open Circuit Correction [5020H] By writing the point frequency 0001~0003 to the register 5020, the AT381x will begin to perform an open-circuit point frequency correction. After clearing is complete, you can get the clear status by reading the 5008 register:...

  • Page 121: Spot Frequency Short-Circuit Correction [5028H]

    12.6.5 Spot Frequency Short-Circuit Correction [5028H] By writing the point frequency 0001~0003 to the register 5028, the AT381x will begin to perform an open-circuit point frequency correction. After clearing is complete, you can get the clear status by reading the 5028 register:...

  • Page 122: 13. Accuracy

    AT381x User's Guide 13. Accuracy This chapter includes the following: Accuracy • Accuracy Factor • Measurement accuracy includes errors such as measurement stability, temperature coefficient, linearity, measurement repeatability, etc. The accuracy of the instrument measurement must be checked under the following conditions: Warm-up time: ≥...

  • Page 123: Accuracy

    Accuracy Condition of the above formula is Q ×D <1 13.1.4 θ Accuracy θ accuracy are given by the following formula： θ × [deg] π 13.1.5 Accuracy When D (measured D value) ≤ 0.1 accuracy are given by the following formula： ×...
  • Page 124 AT381x User's Guide [OHM] 10pF 100kH 10kH 100fF 10pF 100H [S ] 100pF 100M 100n 1.5M 10nF 100mH 100nF 100k 10mH 100u 0.05 10uF 100uH 100uF 10uH 100m 10mF 0.25 0.35 100nH 100mF 100m 0.65 10nH 20Hz 100Hz 1kHz 10kHz...
  • Page 125 Accuracy 100m 150m 200m 500m [V rms] Table 13-1 Impedance scale factor Ka, Kb Frequ Speed ency × − <10 − × 100H − Medium 1 × z≤fm × − Medium 2 ≤100 Slow fm>1 − × − × 00kH −...

  • Page 126: Performace Test

    Warm-up time: ≥ 20 minutes. After warming up, open circuit and short circuit correction are performed. The AT381x range works at “AUTO” to select the correct measurement range. This test is only included in the test of main specifications. Other parameters not listed, users can test under the specified conditions according to the specifications listed in this manual.

  • Page 127: Function Check

    13.3.4 Frequency accuracy test Connect the ground terminal of the frequency meter to the ground of the AT381x. The test terminal of the frequency meter is connected to HD terminal of the instrument test terminal. Change the frequency to: 20Hz, 100Hz, 1kHz, 10kHz, 100kHz, the reading of the frequency meter should meet the requirements in the specification.
  • Page 128 AT381x User's Guide standard resistors 10Ω, 100Ω, 1kΩ, 10kΩ, 100kΩ, change the frequency, and the error between the instrument reading and the standard value should be within the allowable error range specified in 6.1.
  • Page 129 Examples 14. Examples This section describes the basic test procedures and basic LCR theory, and gives examples of how to make measurements. This chapter mainly explains: Basic measurement procedures • Examples of measurement methods • 14.1 Basic Measurement Procedure The following flow chart shows the basic procedures used to measure the impedance of capacitors, inductors, resistors, and other components.
  • Page 130 Test Frequency: 100 kHz  Test Signal Level:  Step 1 Turn the AT381x ON, AT381x enter enter Meas page Step 2 Use the cursor key to select [FUNC]: Press soft key to select Cp-D [FREQ]: Input 100kHz [LEVEL]: Input 1V Step 3 Connect the test fixture ATL601 to the AT381x.
  • Page 131 Examples Step 7 View test results Figure 14-2 Capacitor test results...
  • Page 132 AT381x User's Guide 15. Specification This chapter includes the following information: Specifications  Dimension  Accuracy is defined as meeting all of the following conditions. Temperature: 23℃±5℃ Humidity: ≤65% R.H. Zeroing: Open and Short Correction Warm up time: >60 minutes...
  • Page 133 Specification Typical frequency point:（AT3818，unit: Hz） 1.2k 1.5k 2.5k 100k 120k 150k 200k 250k 300k Test Level： ACV: 10.00mV~2.00V, accuracy: 10%, CV mode accuracy: 6% ACI: 100.0μA~20.00mA, accuracy: 10%, CC mode accuracy: 6% @2Vmax DCR: ±1VDC (2Vpp) square wave, 3Hz maximum 0.033A (Max), output impedance 30Ω...
  • Page 134 AT381x User's Guide Power Supply： 90V-260VAC，50Hz~60Hz Fuse： 250V 3A Slow-Blow Maximum rated power： 15VA Weight： 3.5kg, net 15.2 Dimensions Dimensions -AT381x User's Guide- English ©2005-2019 Applent Instruments Ltd.

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