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Aktakom ABM-4082 User Manual

5 1/2 digit multimeter
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ABM-4082
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Digit Multimeter
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USER`S MANUAL
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Summary of Contents for Aktakom ABM-4082

  • Page 1 ABM-4082 Digit Multimeter USER`S MANUAL www.tmatlantic.com...

  • Page 2: Safety Precautions

    ABM-4082 Notice The information contained in this document is subject to change without notice. Safety notice supplement As described in the International Electrotechnical Commission (IEC) Standard IEC 664, digital multimeter measuring circuits are Installation Category II. All other instruments’ signal terminals are Installation Category I and must not be connected to mains.
  • Page 3 ABM-4082 Before operating an instrument, make sure the line cord is connected to a properly grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear. Cracks, or breaks before each use. For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under test.

  • Page 4: Table Of Contents

    ABM-4082 Contents Chapter 1 General Information ..........................7 1.1 Feature Overview............................7 1.2 Operating Environment ..........................7 1.3 Dimensions and Weight ..........................7 1.4 Safety symbols and Precautions ........................8 1.5 Incoming Inspection ............................ 8 1.6 Warranty ..............................9 1.7 Limitation of Warranty ..........................9 Chapter 2 DMM Overview ...........................
  • Page 5 ABM-4082 3.8.1 mX+b ............................. 28 3.8.2 Percent ............................29 3.8.3 dB Calculation ..........................30 3.8.4 dBm Calculation .......................... 30 Chapter 4 Measurement Options ........................32 4.1 Measurement configuration ........................32 4.1.1 Range ............................32 4.1.2 Filter .............................. 33 4.1.3 Relative ............................34 4.1.4 Rate ...............................
  • Page 6 ABM-4082 5.3.3 GPIB Addressing ......................... 54 5.3.4 General Bus Commands ......................55 5.4 Data Format ............................... 55 Chapter 6 SCPI Command Reference ......................56 6.1 Command structure ............................ 56 6.2 Command Syntax ............................56 6.2.1 Commands and command parameters ................... 56 6.2.2 Short-form Rules .........................

  • Page 7: Chapter 1 General Information

    Feature Overview ABM-4082 is a 5½ digital multimeter with high accuracy, stability and speed. The multimeter can provides a maximum measurement speed of 1000 readings/sec. DMM has a 0.01% DC voltage basic accuracy, 0.03% basic resistance accuracy and other high performance. DMM has broad measurement ranges: DC voltage from 1μV to 1000V...

  • Page 8: Safety Symbols And Precautions

    ABM-4082 Safety symbols and Precautions symbol on the instrument indicates that user should refer to the operating instructions located in the manual before performing. symbol on the instrument shows that high voltage may be present on the terminal(s). Be careful to avoid personal contact with these voltages.

  • Page 9: Warranty

    ABM-4082 Warranty Aktakom warrants this product to be free from defects in material and workmanship for a period of 2 years from the date of shipment. During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.

  • Page 10: Chapter 2 Dmm Overview

    ABM-4082 Chapter 2 DMM Overview Front Panel Summary The front panel of the DMM is shown in Figure 2-1. This figure includes some important abbreviated information that should be reviewed before operating the instrument. Figure 2-1 DMM Front Panel Measurement function keys (shifted and unshifted) Select measurement function: DC voltage and current, AC voltage and current, 2-wire and 4-wire resistance, frequency, period, continuity and diode test.

  • Page 11: Annunciators On Screen

    ABM-4082 → Open/Close menu Shift → Shift Recall the menu performed last time. Move through selections within menu level, command level or parameter level Move through selections within menu level, command level or parameter level. Move up a level. Move down a level.

  • Page 12: Front Panel Menu Reference

    ABM-4082 FAST Fast reading rate FILT Digital filter enabled HOLD Reading HOLD is enabled MATH A math operation is enabled (mX+b, %, dB, dBm). Medium reading rate Turns on when reading memory is enabled Relative reading displayed Multimeter is in remote mode...
  • Page 13 ABM-4082 1:RDGS STORE → 2:RDGS COUNT → 3:SAVED RDGS → 4:BEEP →5:SAVE CNFG → 6:LOAD CNFG → 7:DISPLAY → 8:KEY SOUND → 9:TEST 1. RDGS STORE Enable or disable reading memory. 2. RDGS COUNT Set the number of readings to be saved (2 to 512).

  • Page 14: Front Panel Menu Overview

    ABM-4082 Front Panel Menu Overview The menu is organized in a top-down tree structure with three levels (menus, commands and parameters) as shown in Figure 2-3. You can use down ( ) or up ( ) to move menu tree from one level to another.

  • Page 15: Rear Panel Summary

    Power-line fuse is used for instrument protection. (220V/500mA or 110V/1A) Note: Please use the same-type fuse or contact your nearest Aktakom sales and service office. To verify and replace the fuse, remove the power cable and pull out the fuse holder.

  • Page 16: Power Up

    ABM-4082 Power up 2.6.1 Power Line Connection Follow the procedure below to connect the DMM to line power and turn on the instrument. Check to make sure that the line voltage is in the range of 198V to 242V (or 110V±10% ) and line frequency is in the range of 47.5 to 52.5Hz (or 60Hz±5%) before connecting the power cord.

  • Page 17: Power-On Defaults

    ABM-4082 and creates a hazardous condition. Use the following sequence when measuring high energy circuits: De-energize the circuit using the regular installed connect-disconnect device, such as a circuit breaker, main switch, etc. Attach the test leads to the circuit under test. Use appropriate safety rated test leads for this application.
  • Page 18 ABM-4082 Table 2-2 Factory Default Settings Setting Factory Default Autozero Buffer No effect Continuity Beeper Digits 4 1/2 Rate Fast(0.1 PLC) 10Ω Threshold Current(AC and DC) Digits(AC) 5 1/2 Digits(DC) 5 1/2 Filter Count Mode Moving average Range Auto Relative...

  • Page 19: Warm-Up Time

    ABM-4082 Table 2-2 Factory Default Settings (cont.) Resistance(2-wire and 4-wire) Digits 5 1/2 Filter Count Mode Moving average Range Auto Relative Value Rate Medium(1 PLC) RS-232(USB) Baud 9600 Triggers Continuous Delay Auto Source Immediate Voltage(AC and DC) dB reference No effect 75Ω...

  • Page 20: Chapter 3 Basic Measurements

    ABM-4082 Chapter 3 Basic Measurements Preparation One of the first things you would like to do with your multimeter is to become acquainted with its front panel. We have provided some exercises in foregoing chapters about preparations for use and operations of front panel.

  • Page 21: Crest Factor

    ABM-4082 Input Resistance = 10MΩ on 1000V and 100V ranges; > 10GΩ on 10V, 1V and 100mV ranges CAUTION: Maximum Input = 1010V peak Input Impedance = 1MΩ and 100pF × CAUTION: Maximum Input = 750V RMS or 1000V peak, 3 V.Hz...

  • Page 22: Connections

    ABM-4082 3.3.1 Connections Assuming Model DMM is under factory default conditions, the basic procedure is as follows: 1. Connect test leads to INPUT LO and SENSE LO terminals 2. Select DCI or ACI measurement function by pressing Shift → DCV or Shift → ACV 3.

  • Page 23: Front Panel Fuse Replacement

    ABM-4082 3.3.2 Front Panel Fuse Replacement WARNING: Make sure the instrument is disconnected from the power line and other equipment before replacing the fuse. 1. Turn off the power and disconnect the power line and test leads. 2. From the front panel, use a screwdriver to rotate the fuse carrier several turns counter-clockwise. Take the fuse carrier out of the socket.

  • Page 24: Shielding

    ABM-4082 Note: Source current flows from the INPUT HI to INPUT LO terminals Note: Source current flows from the INPUT HI to INPUT LO terminals Figure 3-3 Two- and Four- wire Resistance Measurements 3.4.2 Shielding To achieve a stable reading, it helps to shield resistances greater than 100kΩ. Place the resistance in a shielded enclosure and connect the shield to the INPUT LO terminal of the instrument electrically.

  • Page 25: Gate Time

    ABM-4082 Model DMM uses an interactive counting technique to measure frequency and period. This method generates constant measurement resolution for any input frequency. All frequency counters are subject to errors when measuring low-voltage, low-frequency signals. Both internal noise and external noise are also critical when measuring low-voltage, low frequency signals.

  • Page 26: Measuring Continuity

    ABM-4082 Measuring Continuity Model DMM uses the 1kΩ range to measure circuit continuity. A threshold resistance level (1Ω to 1000Ω) should be set and factory default value is 10Ω. Multimeter alerts you with a beep when a reading is below the set level.

  • Page 27: Testing Diode

    ABM-4082 Testing Diode Model DMM can also be used to measure the forward voltage drop of general-purpose diodes and the zener voltage of zener diodes. A current range (10mA, 100μA or 10μA) can be selected for diode measurement. Note: Diode test has a non-selectable reading rate of Medium (1 PLC) 3.7.1...

  • Page 28: Math Functions

    ABM-4082 Math Functions Model DMM math operations are divided into four categories:  mX+b and percent  dB and dBm calculations  Statistics of buffered readings  Limit testing The first two categories are discussed here; buffered reading statistics and reading limit testing are described in the next chapter –...

  • Page 29: Percent

    ABM-4082 a moment and then DMM returns back to the command level. Press Trig (ESC) to cancel the M value input, DMM returns back to the command level without changing the M value. 5. Press , “2: SET B” will be displayed (Command level).

  • Page 30: Db Calculation

    ABM-4082 Model DMM will display measurement result of calculation. If the value of “Input” is larger than that of “Reference”, displayed result will be positive; contrarily, it will be negative if the value of “Input” is smaller than that of “Reference”.
  • Page 31 ABM-4082 impedance is applied. The relationship between dBm, reference impedance, and the voltage is defined by the following equation: Where: is the DC or AC input signal voltage value. Z is the specified reference impedance. If a relative value is in effect when dBm is selected, the relative value will be converted to dBm value before REL is applied.

  • Page 32: Chapter 4 Measurement Options

    ABM-4082 Chapter 4 Measurement Options This chapter provides description of the front panel features of DMM. For those measurement options accessible only by a remote interface, refer to Chapter 5 and 6. This chapter is organized as follows:  Measurement Configuration – Describes Ranging, Filtering, Relative readings, Digits of Resolution and Measurement rate ...

  • Page 33: Filter

    ABM-4082 To cancel autoranging, press Auto or key. Pressing Auto to cancel autoranging leaves the instrument on the present range. The Auto key has no effect on the continuity and diode test functions. 4.1.2 Filter FILTER lets you set the filter response to stabilize noisy measurements. Model DMM uses a digital filter.

  • Page 34: Relative

    ABM-4082 Filter Types A: Moving Average The Moving average filter uses a first-in, first-out stack. When the stack becomes full, the measurement conversions are averaged, yielding a reading. For each subsequent conversion placed into the stack, the oldest conversion is discarded, and the stack is re-averaged, yielding a new reading. Shown in Figure 4-1.

  • Page 35: Rate

    ABM-4082 Additionally, when you perform a zero correction for DCV, Ω2 or Ω4 measurements by enabling REL, the displayed offset becomes the reference value. Subtracting the offset from the actual input zeroes the display, as follows: Displayed reading = Actual Input – Reference Select a range that cannot accommodate the relative value does not cause an overflow condition, but it also does not increase the maximum allowable input for that range.

  • Page 36: Trigger Operations

    ABM-4082 Note: The integration time can be set for any measurement function except frequency, period, continuity (FAST) and diode test (MEDium). For frequency and period, this value is gate time of 1sec. Trigger Operations The multimeter’s triggering system allows you to generate triggers either manually or automatically or externally and take multiple readings per trigger.
  • Page 37 ABM-4082 Event detection is satisfied for both kinds of triggers as below: 1. A bus trigger (*TRG) command is received. 2. The front panel Trig key is pressed (DMM must be taken out of remote before it will respond to Trig key).

  • Page 38: Reading Hold

    ABM-4082 be displayed. 9. Press to move down a level to set the type of delay mode. 10. Using to select AUTO or MANU delay mode. 11. Press Auto (ENTER) to confirm the choice. The message “CHANGE SAVED” will be displayed to show that the change is now in effect.

  • Page 39: Ext Trig & Vm Comp

    ABM-4082 be displayed. Press to move down to the command level within the TRIG MENU, “1: READ HOLD” will be displayed. Press to move down a level to select a window percentage. key to select a window percentage (0.01%, 0.1%, 1%, 10%).

  • Page 40: Buffer Operations

    ABM-4082 Buffer Operations Model DMM has a buffer to store from 2 to 512 readings and units. In addition, recalled data includes statistical information, such as minimum, maximum, average and standard deviation. The buffer fills with the requested number of readings and stops. Readings are placed in the buffer after any math operations are performed.

  • Page 41: Buffer Statistics

    ABM-4082 Press to move down to the command level within the SYS MENU, “1: RDGS STORE” will be displayed. key to move across to the SAVED RDGS command, “3: SAVED RDGS” will be displayed. Press to move down a level to view the stored readings. “MEM” annunciator turns on. If there is no reading stored, “BUFFER EMPTY”...

  • Page 42: Setting Limit Values

    ABM-4082 Press Shift → to enter the menu on the menu level, “A: MEAS MENU” will be displayed. key to move across to the MATH MENU on the menu level, “B: MATH MENU” will be displayed. Press to move down to the command level within the MATH MENU, “1: SET M” will be displayed.

  • Page 43: System Operations

    ABM-4082 12. Press Shift → key to exit from the menu and return to the measurement status. System Operations Model DMM has some other operations. Beeper control, saving and restoring setup information, front panel display control, key sound control, self-test and calibration. These information is not directly related to making measurements but is an important part of operating the multimeter.

  • Page 44: Restore Settings

    ABM-4082 To save present settings as user’s setting, please follow steps below: Press Shift → to enter the menu on the menu level, “A: MEAS MENU” will be displayed. key to move across to the SYS MENU on the menu level, “D: SYS MENU” will be displayed.

  • Page 45: Key Sound

    ABM-4082 Use following steps for display control settings: Press Shift → to enter the menu on the menu level, “A: MEAS MENU” will be displayed. key to move across to the SYS MENU on the menu level, “D: SYS MENU” will be displayed.

  • Page 46: Calibration

    ABM-4082 4.5.7 Calibration To make sure the instrument could achieve the designed performance, re-calibration and verification is required at least once a year. Instrument calibration could be performed either via the calibration menu from the front panel or through a remote control interface.

  • Page 47: Chapter 5 Remote Operation

    ABM-4082 Chapter 5 Remote Operation Besides the front panel control, DMM supports RS-232 serial interface and GPIB parallel interface for remote control. You can use only one interface at a time. Standard Commands for Programmable Instruments (SCPI) is fully supported by the RS-232 and GPIB interfaces, however they use different hardware configurations and communication protocols.

  • Page 48: Gpib

    ABM-4082 key to select USB interface. Press Shift (ENTER) to confirm the selection. The message “CHANGE SAVED” will be displayed to show that the change is now in effect. DMM will exit the parameter level and move up a level to the command level.
  • Page 49 ABM-4082 Table 5-1 Signal Definition for 9 Pin Connector 9 Pin Connector Function Code Pin Number Request To Send Clear To Send Data Set Ready Data Carrier Detect Data Terminal Ready Transmitted Data Received Data Signal Ground Common DMM’s serial port uses the transmit (TXD), receive (RXD), and signal ground (GND) lines of the RS232 standard.

  • Page 50: Sending And Receiving Data

    ABM-4082 Connection between DMM and a computer shown as Figure 5-2: Figure 5-2 RS-232 Connection Sketch There may be some difference between DMM RS232 interface and a standard RS232C interface. You can make the connection cable by yourself according the diagram or order one from our company.

  • Page 51: Selecting The Parity Mode

    ABM-4082 key to move across to the I/O MENU on the menu level, “E: I/O MENU” will be displayed. Press to move down to the command level within the I/O MENU, “1: GPIB ADDR” will be displayed. key to move across to the BAUD RATE command, “3: BAUD RATE” will be displayed.

  • Page 52: Software Handshake On/Off

    ABM-4082 Press Auto (ENTER) to confirm the selection. The message “CHANGE SAVED” will be displayed to show that the change is now in effect. DMM will exit the parameter level and move up a level to the command level. Press Shift →...

  • Page 53: Gpib Interface Operation

    ABM-4082 when a query command is received; DMM will send the query response information. Once a query command is received, DMM will send the query response information immediately even if the rest commands have not been finished. So if the command includes two queries, the controller should read the query responses twice.

  • Page 54: Gpib Interface Capability

    ABM-4082 Figure 5-4 Typical GPIB System Interconnection 5.3.2 GPIB Interface Capability Table 5-3 lists the DMM’s GPIB capabilities and functions. These functions provide the mean for an instrument to receive, process, and transmit commands, data, and status over the GPIB bus.

  • Page 55: General Bus Commands

    ABM-4082 show that the change is now in effect. DMM will exit the parameter level and move up a level to the command level. Press Shift → key to exit from the menu and return to the measurement status. 5.3.4...

  • Page 56: Chapter 6 Scpi Command Reference

    ABM-4082 Chapter 6 SCPI Command Reference This chapter provides descriptions of all DMM's available GPIB commands which correspond to Standard Commands for Programmable Instruments (SCPI) command sets. Use this chapter as a reference. Command structure DMM commands are divided into two types: GPIB common commands and SCPI commands. The GPIB common commands are defined in IEEE std.
  • Page 57 ABM-4082 :RANGe[:UPPer] <n> These brackets indicate that :UPPer is optional and does not have to be used. Thus, the above command can be sent in one of the two ways below: :RANGe <n> :RANGe:UPPer <n> NOTICE: When using optional command words in your program, do not include the brackets.

  • Page 58: Short-Form Rules

    ABM-4082 value. Examples: [:SENSe[1]]:CURRent[:DC]:NPLCycles 1 [:SENSe[1]]:CURRent[:DC]:NPLCycles DEFault [:SENSe[1]]:CURRent[:DC]:NPLCycles MINimum [:SENSe[1]]:CURRent[:DC]:NPLCycles MAXimum 6.2.2 Short-form Rules Use the following rules to determine the short-form version of any SCPI command:  If the length of the command word is four letters or less, no short form version exists. Example: :AUTO = :AUTO ...

  • Page 59: Multiple Command Rules

    ABM-4082 6.2.4 Multiple Command Rules The semicolon (;) can be used as a separator to execute multiple commands on a single line. The multiple command rules are as follows.  Commands at the same level and in the same subsystem command group can be separated by a semicolon (;) on a multiple command line.
  • Page 60 ABM-4082 Table 6-1 Signal Oriented Measurement Command Summary Command Function Description MEASure:<function>? Perform an :ABORt, :CONFigure:<function>, and a :READ? :CONFigure:<function> Configure DMM in a “one-shot” measurement mode for a specified function. :FETCh? Request the latest reading. :READ? Perform an :ABORt, :INITiate, and a :FETCh?
  • Page 61 ABM-4082 Command parameter : <function> = VOLTage[:DC] DC voltage VOLTage:AC AC voltage CURRent[:DC] DC current CURRent:AC AC current RESistance 2-wire resistor FRESistance 4-wire resistor FREQuency Frequency PERiod Period DIODe Diode testing CONTinuity Continuity test Query: :CONFigure? Query the selected function.

  • Page 62: Display Subsystem

    ABM-4082 This command will be automatically asserted when :READ? or :MEASure? command is sent. READ? Command Command syntax: :READ? Description: Typically, this command is used with the instrument in the “one-shot” measurement mode to trigger and acquire a specified number of readings. The:SAMPle:COUNt command is used to specify the number of readings (seeTrigger Subsystem).

  • Page 63: Calculate Subsystem

    ABM-4082 :ENABle <b> Command syntax: :DISPlay:ENABle <b> Command Parameter: <b> = 0 or OFF Disable front panel dislay 1 or ON Enable front panel display Query: :ENABle? Query state of the display Description: This command is used to enable or disable front panel display circuitry. When disabled, the instrument operates at a higher speed.
  • Page 64 ABM-4082 Table 6-3 CALCulate Command Summary Default Command Function Description Parameter :CALCulate[1] Subsystem to control CALC1: :FORMat <name> Select math format (NONE,MXB,PERCent) PERCent :FORMat? Query math format. :KMATh Path to configure math calculations: :MMFactor <NRf> Set “m” factor for mx+b (-100e6 to 100e6) :MMFactor? Query “m”...
  • Page 65 ABM-4082 Use these commands to configure and control MXB and percent math calculations. :FORMat <name> Command syntax: :CALCulate[1]:FORMat <name> Command Parameter: <name> = NONE No calculations Polynomial math calculation PERCent Percent math calculation Query: :FORMat? Query programmed math format Description: This command is used to specify the format for the CALC1 math calculations.
  • Page 66 ABM-4082 :PERCent <NRf> Command syntax: :CALCulate[1]:KMATh:PERCent <NRf> Command Parameter: <NRf> = -1e6 to1e6 Specify target value. Query: :PERCent? Query percent target value Description: This command is used to specify the target value for the percent calculation. :ACQuire Command syntax: : CALCulate[1]:KMATh:PERCent:ACQuire...
  • Page 67 ABM-4082 buffer. :TRACe Command :CLEar Command syntax: :CALCulate2:TRACe:CLEar Description: This action command is used to clear the readings in the buffer. If the buffer is not cleared, a subsequent store will overwrite the old readings. If the subsequent store is aborted before the buffer becomes full, you could end up with some “old”...
  • Page 68 ABM-4082 Description: This command is used to specify the format for the CALC2 math calculation. The calculation operations for CALC2 use data stored in the buffer. With NONE selected, no CALC2 calculation is performed. With any of the other formats selected and CALC2 enabled, the math calculation will be performed every time the :IMMediate or :IMMediate? Command is executed.
  • Page 69 ABM-4082 Query: :UPPer? Query upper limit :LOWer? Query lower limit Description: This command is used to specify the upper and lower limit for LIMIT1. The actual limit depends on which measurement function is currently selected. For example, a limit value of 1 is 1V for the volts functions (DCV or ACV), 1A for the current function (DCI or ACI), 1Ω...

  • Page 70: Sense Subsystem Command

    ABM-4082 6.3.4 SENSe subsystem command This SENSe subsystem is used to configure and control Model DMM measurement functions and are summarized in Table 6-4. Table 6-4 SENSe Command Summary Command Function Description Default [:SENSe[1]] :FUNCtion<name> Select measurement function: ‘VOLTage:AC’, VOLT:DC ‘VOLTage:DC’,...
  • Page 71 ABM-4082 Table 6-4 SENSe Command Summary (cont.) Command Function Description Default :CURRent:DC Path to configure DC current :NPLCycles <n> Set integration rate(line cycles; 0.1 to 10) :NPLCycles? Query line cycle integration rate :RANGe Path to configure measurement range [:UPPer] <n>...
  • Page 72 ABM-4082 Table 6-4 SENSe Command Summary (cont.) Command Function Description Default :VOLTage:DC Path to configure DC voltage :NPLCycles <n> Set integration rate (line cycle; 0.1 to 10) :NPLCycles? Query line cycle integration rate :RANGe Path to configure measurement range Select range (0 to 1010) 1000 [:UPPer] <n〉...
  • Page 73 ABM-4082 Table 6-4 SENSe Command Summary (cont.) Command Function description Default :FRESistance Path to configure 4-wire resistance :NPLCycles <n> Set integration rate (line cycle: 0.1 to 10) :NPLCycles? Query line cycle integration rate :RANGe Path to configure measurement range Select range (0 to 120e6) 100e6 [:UPPer] <n〉...
  • Page 74 ABM-4082 Table 6-4 SENSe Command Summary (cont.) Command Function description Default :DIODe Path to configure diode test :CURRent :RANGe Path to select range [:UPPer] <NRf> Select range(0 to 1e-3) 1e-3 [:UPPer]? Query range :CONTinuity Path to configure continuity test :THReshold <NRf>...
  • Page 75 ABM-4082 Command syntax: [:SENSe[1]]:DATA? Description: This query command is used to read the latest instrument reading. This command returns the “raw” reading or a reading that is the result of the reference (REL from the front panel) operation. For example, if a reference value of 1.0 is established, the reading returned by this command is the “raw”...
  • Page 76 ABM-4082 compared to the “seed” reading during the HOLD process. :STATe <b> Command syntax: [:SENSe[1]]:HOLD:STATe <b> Command Parameter: <b> = 0 or OFF Disable HOLD 1 or ON Enable HOLD Query: :STATe? Query state of HOLD Description: This command is used to enable or disable HOLD.
  • Page 77 ABM-4082 [:SENSe[1]]:CURRent:AC:RANGe[:UPPer] <n> Set measurement range for ACI [:SENSe[1]]:CURRent[:DC]:RANGe[:UPPer] <n> Set measurement range for DCI [:SENSe[1]]:VOLTage:AC:RANGe[:UPPer] <n> Set measurement range for ACV [:SENSe[1]]:VOLTage[:DC]:RANGe[:UPPer] <n> Set measurement range for DCV Set measurement range for Ω2 [:SENSe[1]]:RESistance:RANGe[:UPPer] <n> Set measurement range for Ω4 [:SENSe[1]]:FRESistance:RANGe[:UPPer] <n>...
  • Page 78 ABM-4082 Description: These command are used to control auto ranging. With auto ranging enabled, the instrument automatically goes to the most sensitive range to perform the measurement. The auto range command (:RANGe:AUTO) is coupled to the command that manually selects the measurement range (:RANGe <n>).
  • Page 79 ABM-4082 the :REFerence <n> command, the REFerence? Query command returns the programmed value. Conversely, when a reference is set using the :ACQuiry command, the :REFerence? Query command returns the acquired reference value. :STATe <b> Command syntax: [:SENSe[1]]:CURRent:AC:REFerence:STATe <b> Control reference for ACI [:SENSe[1]]:CURRent[:DC]:REFerence:STATe <b>...
  • Page 80 ABM-4082 this command while in any other function causes an error. Also, if the latest reading is overflowed or a reading has not been triggered, an error occurs when this command is sent. :AVERage Commands This command is used to configure and control the filter.
  • Page 81 ABM-4082 These commands are used to select the type of averaging filter for the specified function. :COUNt <n> Command syntax: [:SENSe[1]]:CURRent:AC:AVERage:COUNt <n> Specify filter count for ACI [:SENSe[1]]:CURRent[:DC]:AVERage:COUNt <n> Specify filter count for DCI [:SENSe[1]]:VOLTage:AC:AVERage:COUNt <n> Specify filter count for ACV [:SENSe[1]]:VOLTage[:DC]:AVERage:COUNt <n>...
  • Page 82 ABM-4082 select the most sensitive current or voltage threshold range. :DIODe Command :RANGe[:UPPer] <NRf> Command syntax: [:SENSe[1]]:DIODe:CURRent:RANGe[:UPPer] <NRf> Specify current range for diode test Command parameter: <NRf> = 1 (1 mA) Specify diode test current to 1mA 10 (10μA) Specify diode test current to 10μA 100(100μA)

  • Page 83: System Subsystem

    ABM-4082 6.3.5 SYSTem Subsystem The SYSTem subsystem contains miscellaneous commands that are summarized in Table 6-5 Table 6-5 SYSTem Command Summary Command Function Description Default :SYSTem :PRESet Return to system defaults :AZERo Path to set up autozero :STATe <b> Enable or disable atuozero...
  • Page 84 ABM-4082 :BEEPer Command [:STATe] <b> Command Syntax: :SYSTem:BEEPer[:STATe] <b> Command Parameter: <b> = 1 or ON Enable beeper 0 or OFF Disable beeper Query: [:STATe]? Query state of beeper Description: This command is used to enable or disable the beeper for limit tests.

  • Page 85: Unit Subsystem

    ABM-4082 6.3.6 UNIT Subsystem The UNIT subsystem is used to configure and control the measurement units for ACV, and DCV, and is summarized in Table 6-6. Table 6-6 UNIT Command Summary Command Function description Default :UNIT :VOLTage Path to configure voltage unit :AC <name>...
  • Page 86 ABM-4082 :DB:REFerence <n> Command Syntax: :UNIT:VOLTage:AC:DB:REFerence <n> Command Parameter: <n> = 1e-7 to 1000 Specify reference voltage Query: :DB:REFerence? Query reference voltage Description: This command is used to specify the dB reference level. When DB units is selected, ACV dB measurements are made using the specified dB reference impedance.
  • Page 87 ABM-4082 :VOLTage:DC? Query DC voltage units Description: This command is used to select the units for DCV measurements. With volt (V) units selected, normal DC voltage measurements are made for the DCV function. With DB units selected, DC dB voltage measurements are performed.

  • Page 88: Trigger Subsystem

    ABM-4082 6.3.7 TRIGger Subsystem The Trigger subsystem is made up of a series of commands and subsystems to configure the Trigger model. These commands and subsystems are summarized in Table 6-7 Table 6-7 TRIGger Command Summary Command Function Description Default...
  • Page 89 ABM-4082 :CONTinuous? Query continuous initiation Description: When continuous initiation is selected (ON), the instrument is taken out of the idle state. At the conclusion of all programmed operations, the instrument returns to the top of the trigger model. NOTE: With continuous initiation enabled (ON), you cannot use the :READ? command or set sample count greater than one (see:SAMPle:COUNt).
  • Page 90 ABM-4082 the AUTO parameter and this value is stored in the volatile memory. :AUTO <b> Command Syntax: :TRIGger:DELay:AUTO <b> Command parameter: <b> = 1 or ON Enable atuo delay 0 or OFF Disable atuo delay Query: :AUTO? Query delay state Description: This command is used for enable or disable auto delay state at trigger model.

  • Page 91: R Subsystem

    ABM-4082 Description: Set sample count of every trigger. The reference value is saved in the volatile memory. 6.3.8 R Subsystem Description: The R subsystem is use to read the measurement results stored in the memory. 6.3.9 Common Commands Common commands can be used to all equipments. We provide some common commands as below:...

  • Page 92: Chapter 7 Specifications

    ABM-4082 Chapter 7 Specifications Introduction Chapter 7 describes the complete specifications of the DMM . Technical Specifications Specifications Assumptions  One year calibration cycle.  Operating temperature at 18°C to 28°C  Accuracy is expressed as: ±(% of reading + % of range ) after 30 minutes’ warm-up.
  • Page 93 ABM-4082 DC CHARACTERISTICS CONDITIONS: SLOW or MED with filter of 10 ±（% of reading + % of range） ACCURACY:  DC Voltage Resolution, Full Scale reading and Accuracy Typical Accuracy Full Scale Rate Range Resolution Input (1 year) Reading Impedance 1μV...
  • Page 94 ABM-4082  Resistance (2-Wire and 4-Wire) Full Scale Accuracy Rate Range Resolution Test Current Reading (1 year) 100.000Ω 1mΩ 119.999 1 mA 0.05 +0.008 1.00000 kΩ 10mΩ 0.03 +0.004 1.19999 1 mA 100mΩ Slow 10.0000kΩ 11.9999 100μA 0.03 +0.004 100.000 kΩ...
  • Page 95 ABM-4082  DC Current Full Scale Accuracy Burden Voltage Rate Range Resolution Reading (1 year) & Shunt Resistor 0.1μA <0.15V / 10.1Ω 10.0000mA 11.9999 0.05+0.008 1μA <1.5V / 10.1Ω 100.000mA 119.999 0.05+0.004 Slow 10μA <0.3V / 0.1Ω 1.00000A 1.19999 0.10+0.004 100μA...
  • Page 96 ABM-4082 Continuity Full Scale Accuracy Rate Range Resolution Test Current Reading (1 year) 1kΩ 100mΩ Fast 999.9 0.10+0.020 Maximum Input Protection: 1000VDC or 750VAC for all ranges. Open circuit voltage: <13.3V DC Test Current: around 1mA DC Threshold resistance: From 1Ω to 1000Ω, default of power on is 10Ω...
  • Page 97 ABM-4082 TRUE RMS AC VOLTAGE AND CURRENT CHARACTERISTICS ACCURACY: ±（% of reading + % of range ） ，23℃±5℃。  AC Voltage Resolution and Full Scale Reading Resolution Full Scale Reading Range Slow & Med Fast Slow & Med Fast 1μV 10μV...
  • Page 98 ABM-4082  AC Current (True RMS, AC Coupling) Resolution and Full Scale Reading Full Scale Burden Voltage Rate Range Resolution Reading & Shunt Resistor 0.1μA <0.15V / 10.1Ω 10.0000mA 11.9999 10μA <0.3V / 0.1Ω Slow 1.00000A 1.19999 100μA <0.15V / 10mΩ...

  • Page 99: Frequency And Period Characteristics

    ABM-4082 FREQUENCY AND PERIOD CHARACTERISTICS CONDITIONS: SLOW RATE (GATE TIME 1 Sec) ACCURACY: ±(% of Reading)  Frequency Input Frequency Gate Resolutio Full Scale Range Accuracy Sensitivity Range Time Reading (Sine Wave) 10μHz 5 to 10Hz 9.99999 0.05 200mVrms 100mV 100μHz...
  • Page 100 ABM-4082 Measuring rate Maximum rate under internal trigger mode: 1000 meas/sec Maximum rate under external trigger mode: 1000 meas/sec (measurement results are stored in the internal memory) Triggering and Memory Reading hold sensitivity: 0.01%, 0.1%, 1% or 10% of reading...

  • Page 101: Chapter 8 Program Examples

    ABM-4082 Chapter 8 Program Examples Serial Interface Program The following example is a communication program. It is programmed with C Language and working in DOS environment. Where the MAIN Function could be extended for communication functions by users and other sub functions show you how to input and output character strings using serial interfaces.
  • Page 102 ABM-4082 for( m = 100;m;m-- ) { send_port( PORT,*ps ); for( n = 1000;n;n-- ) { delay(2); /* wait about 2ms,can use dos.h libray funtion:delay */ if( kbhit() && ( getch() == 27 ) ) /* if escape key keypress */ { printf( "\nE20:Serial Port Write Canceled!"...
  • Page 103 ABM-4082 void send_port( int port,char c ) { union REGS r; r.x.dx = port; /* serial port */ r.h.ah = 1; /* int14 function1: send character */ r.h.al = c; /* character to be sent */ int86( 0x14,&r,&r ); if( r.h.ah & 128 ) /* check ah.7,if set by int86( 0x14,&r,&r ),mean trans error */ { printf( "\nE00:Serial port send error!"...

  • Page 104: Chapter 9 Error Messages

    Chapter 9 Error Messages Number Description ERR:-100 Ram self check failed ERR:-200 DCV Calibrate Data is lost ERR:-201 DCV Short Data is lost ERR:-210 ACV Calibrate Data is lost ERR:-211 ACV Short Data is lost ERR:-220 DCI Calibrate Data is lost ERR:-221 DCI open Data is lost.

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