Aktakom ABM-4082 User manual

ABM-4082
51/2 Digit Multimeter
USER`S MANUAL
www.tmatlantic.com

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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.
This equipment is POLLUTION DEGREE 2, INDOOR USE product.
Safety Precautions
Users of this product must be protected from electric shock at all times. The responsible body
must ensure that users are prevented access and/or insulated from every connection point. In
some cases, connections must be exposed to potential human contact. Product users in these
circumstances must be trained to protect themselves from the risk of electric shock. If the
circuit is capable of operating at or above 1000 Volts, no conductive part of the circuit may be
exposed.

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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. ALWAYS remove power from the entire test system
and discharge any capacitors before: connecting or disconnecting cables or jumpers, or
making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of the circuit
under test or power line (earth) ground. Always make measurements with dry hands while
standing on a dry, insulated surface capable of withstanding the voltage being measured.
The instrument and accessories must be used in accordance with its specifications and
operating instructions or the safety of the equipment may be impaired.
Do not exceed the maximum signal levels of the instruments and accessories, as defined in
the specifications and operating information, and as shown on the instrument or test fixture
panels.
When fuses are used in a product, replace with the same type and rating for continued
protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as
safety earth ground connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under
test.

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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................................................................................................................................... 10
2.1 Front Panel Summary ................................................................................................................................ 10
2.2 Annunciators on Screen..............................................................................................................................11
2.3 Front Panel Menu Reference ..................................................................................................................... 12
2.4 Front Panel Menu Overview...................................................................................................................... 14
2.5 Rear Panel Summary ................................................................................................................................. 15
2.6 Power up.................................................................................................................................................... 16
2.6.1 Power Line Connection.............................................................................................................. 16
2.6.2 Power-up Sequence................................................................................................................... 16
2.6.3 High Energy Circuit Safety Precautions .................................................................................. 16
2.6.4 Power-on Defaults....................................................................................................................... 17
2.6.5 Warm-up time .............................................................................................................................. 19
2.7 Display....................................................................................................................................................... 19
Chapter 3 Basic Measurements ......................................................................................................................... 20
3.1 Preparation................................................................................................................................................. 20
3.2 Measuring Voltage..................................................................................................................................... 20
3.2.1 Connections................................................................................................................................. 20
3.2.2 Crest factor................................................................................................................................... 21
3.3 Measuring Current..................................................................................................................................... 21
3.3.1 Connections................................................................................................................................. 22
3.3.2 Front Panel Fuse Replacement................................................................................................ 23
3.4 Measuring Resistance................................................................................................................................ 23
3.4.1 Connections................................................................................................................................. 23
3.4.2 Shielding....................................................................................................................................... 24
3.5 Measuring Frequency and Period.............................................................................................................. 24
3.5.1 Trigger Level and Measurement Errors................................................................................... 24
3.5.2 Gate Time..................................................................................................................................... 25
3.5.3 Connections................................................................................................................................. 25
3.6 Measuring Continuity................................................................................................................................ 26
3.6.1 Connections................................................................................................................................. 26
3.6.2 Threshold resistance level......................................................................................................... 26
3.7 Testing Diode............................................................................................................................................. 27
3.7.1 Connections................................................................................................................................. 27
3.7.2 Current Range............................................................................................................................. 27
3.8 Math Functions.......................................................................................................................................... 28

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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............................................................................................................................................... 35
4.2 Trigger Operations..................................................................................................................................... 36
4.2.1 Trigger model............................................................................................................................... 36
4.2.2 Reading Hold............................................................................................................................... 38
4.2.3 EXT Trig & VM Comp................................................................................................................. 39
4.3 Buffer Operations ...................................................................................................................................... 40
4.3.1 Storing Reading........................................................................................................................... 40
4.3.2 Recalling Readings..................................................................................................................... 40
4.3.3 Buffer statistics ............................................................................................................................ 41
4.4 Limit Operations........................................................................................................................................ 41
4.4.1 Enabling limits.............................................................................................................................. 41
4.4.2 Setting Limit Values .................................................................................................................... 42
4.5 System Operations..................................................................................................................................... 43
4.5.1 Beeper Control ............................................................................................................................ 43
4.5.2 Save Settings............................................................................................................................... 43
4.5.3 Restore Settings.......................................................................................................................... 44
4.5.4 Display Control............................................................................................................................ 44
4.5.5 Key Sound.................................................................................................................................... 45
4.5.6 Self-test......................................................................................................................................... 45
4.5.7 Calibration.................................................................................................................................... 46
Chapter 5 Remote Operation.............................................................................................................................. 47
5.1 Selecting an interface................................................................................................................................. 47
5.1.1 USB............................................................................................................................................... 47
5.1.2 RS-232.......................................................................................................................................... 47
5.1.3 GPIB.............................................................................................................................................. 48
5.2 RS-232 Interface Operation....................................................................................................................... 48
5.2.1 RS-232 Connection .................................................................................................................... 48
5.2.2 Sending and receiving data....................................................................................................... 50
5.2.3 Selecting Baud Rate................................................................................................................... 50
5.2.4 Selecting the Parity Mode.......................................................................................................... 51
5.2.5 Selecting the Terminal Character.............................................................................................. 51
5.2.6 Software Handshake ON/OFF.................................................................................................. 52
5.2.7 Software Protocol........................................................................................................................ 52
5.3 GPIB interface operation........................................................................................................................... 53
5.3.1 GPIB Connection ........................................................................................................................ 53
5.3.2 GPIB Interface Capability........................................................................................................... 54

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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......................................................................................................................... 58
6.2.3 Basic Rules of Command Structure......................................................................................... 58
6.2.4 Multiple Command Rules........................................................................................................... 59
6.2.5 Command Path Rules................................................................................................................ 59
6.3 Command Reference ................................................................................................................................. 59
6.3.1 SCPI Signal Oriented Measurement Commands .................................................................. 59
6.3.2 DISPlay subsystem..................................................................................................................... 62
6.3.3 CALCulate Subsystem............................................................................................................... 63
6.3.4 SENSe subsystem command ................................................................................................... 70
6.3.5 SYSTem Subsystem................................................................................................................... 83
6.3.6 UNIT Subsystem......................................................................................................................... 85
6.3.7 TRIGger Subsystem................................................................................................................... 88
6.3.8 R Subsystem................................................................................................................................ 91
6.3.9 Common Commands.................................................................................................................. 91
Chapter 7 Specifications...................................................................................................................................... 92
Chapter 8 Program Examples........................................................................................................................... 101
Chapter 9 Error Messages ................................................................................................................................ 104

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Chapter 1 General Information
Thanks very much for choosing and using our product. If you have any questions after reviewing this
manual, please contact your local representative or call directly to our application engineers for further
consultation.
1.1 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
AC (RMS) voltage from 1μV to 750V, or about 1000V Peak
DC current from 100nA to 12A
AC (RMS) current from 100nA to 12A
Two and four-wire resistance from 1mΩ to 120MΩ
Frequency from 5Hz to 1MHz
Some additional capabilities of Model DMM:
Full range of functions: In addition to those listed above, The DMM functions include period, dB,
dBm, continuity, diode testing, mX+b and percent.
Programming languages and remote control interfaces: The DMM provides the SCPI
programming language and three remote control interface ports: USB Device, IEEE-488/GPIB
(optional) and RS-232C(optional).
Reading and setup storage: Up to 512 readings and 10 sets of settings can be stored and
retrieved.
Closed-cover calibration: The multimeter can be calibrated either from the front panel or through
the remote control interface.
1.2 Operating Environment
Power supply: 110V/220V ±10%
Line frequency: 50Hz / 60Hz ±5%
Power consumption: <20VA
Operating temperature: 0℃to 40℃
Humidity: ≤ 90%RH
1.3 Dimensions and Weight
Dimensions（W×H×D）： 225mm×100mm×355mm
Net weight: Around 2.5kg

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1.4 Safety symbols and Precautions
The symbol on the instrument indicates that user should refer to the operating instructions located in
the manual before performing.
The symbol on the instrument shows that high voltage may be present on the terminal(s). Be careful
to avoid personal contact with these voltages.
The symbol on the instruments means earth grounding.
The WARNING heading used in the manual explains high voltage danger that might result in personal injury
or death. Always read the associated information very carefully before performing the indicated procedure.
The CAUTION heading in the manual reminds user that hazards could damage the instruments if not
according to operating instructions. Such damage may invalidate the warranty.
1.5 Incoming Inspection
The DMM was carefully inspected mechanically and electrically before shipment. After unpacking all items
from the shipping carton, please check for any obvious signs of physical damage that may have occurred
during transportation. Report any damage to the shipping agent immediately. Save the original packing
carton for possible future reshipment. The following items are included with every Model DMM order:
Model DMM 51/2Digital Multimeter
Test leads
Power cord
Two 500mA fuses
Two 1A fuses
Operation Manual
Quality and warranty certificate
Test report
Other optional accessories if ordered
Verify that you have received all the items above when you get multimeter. If anything is missing, please
contact our representative or our sales office.
Note: IEEE-488 and RS232C interface is optional, additional order is needed.

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1.6 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.
1.7 Limitation of Warranty
This warranty does not apply to defects resulting from product modification without our express written
consent, or misuse of any product or part. This warranty also does not apply to fuses, software, or problems
arising from normal wear or failure to follow instructions.

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Chapter 2 DMM Overview
2.1 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
1. 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.
2. Math function keys
Select the math function: mX+b, %, dB, dBm and Rel.
3. Menu operation keys