Lumel HA-DMA512 User manual

Digital multimeter
HA-DMA512
user’s manual

Digital Multimeter User‟s Guide
1
Brief Introduction
The DMM is 5 1/2digits, fast and high accuracy, multi-function and auto measurement
instrument for Voltage, Current, Resistance, Frequency. The simple front panel and
convenient operation support the demand in measurement.
All Functions:
Measurement Functions:
●DC Voltage: 0.1V, 1V, 10V, 100V, 1000V.
●AC Voltage: 0.1V, 1V, 10V, 100V, 750V.
●DC Current: 10mA, 100mA, 1A, 10A.
●AC Current: 10mA, 100mA, 1A, 10A.
●2 & 4 wire resistance: 100Ω, 1KΩ, 10KΩ, 100KΩ, 1MΩ, 10MΩ, 100MΩ.
●Frequency: 5Hz-1MHz.
●Period
●Diode
●Continuity
●Thermocouple and Temperature
Additional Functions:
dB, dBm, Percentage (%)，Maximum/Minimum (MAX/MIN), Null, Limits, Data
Store and Recall(Store/Recall), Trigger (Trig)
Remote Control:
●RS232 interface
●USB interface
●GPIB interface

Digital Multimeter User‟s Guide
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Standard Accessories and options
Standard Accessories:
Power Cord 1
Testing Lead 1
CD disk 1
Options:
IEEE-488 interface board 1

Digital Multimeter User‟s Guide
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Safety Information
Review the following safe precautions to avoid injury and prevent damage to the product or
any products connected to it. To avoid potential hazards, please make sure of the product
only as specified.
1. Use power cord as specified.
Use only power cord specified for this product and approved for the country of use.
2. Ground the product
This product is grounded through the grounding conductor of the power cord. To avoid
electric shock, the grounding conductor must be connected to earth ground. Before
making connections to the input or output terminals, ensure that the product is properly
grounded.
3. Instructions
Review user‟s manual for detailed information of rating values before making
connections to this product.
4. Do not operate without covers
Do not operate this product with covers or panels removed.
5. Use proper fuse.
Use only the fuse type and rating specified for this product.
6. Do not operate with suspected failures.
If you suspect there is damage, stop using and contact us.
7. Provide proper ventilation
Do not operate this product in wet or damp conditions.
Do not operate this product under inflammable environment.

Digital Multimeter User‟s Guide
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In this book
Chapter 1 Quick Start
1.1 Front Panel at a Glance -----------------------------------------------------------------------7
1.2Rear Panel at a Glance ------------------------------------------------------------------------8
1.3 DisplayAnnunciators -------------------------------------------------------------------------9
1.4 Front Panel Menu at a Glance -------------------------------------------------------------10
1.5 Front Panel Menu Reference ---------------------------------------------------------------11
1.6 Other Introductions --------------------------------------------------------------------------13
1.6.1If the Multimeter does not turn on --------------------------------------------------13
1.6.2 Replace the power-line fuse ---------------------------------------------------------13
1.6.3 Replace current input fuse -----------------------------------------------------------13
1.6.4 State of power-on and reset ----------------------------------------------------------14
Chapter 2 Measurement Functions
2.1 To mesure DC Voltage ---------------------------------------------------------------------16
2.2 To measure DC Current --------------------------------------------------------------------16
2.3 To measureAC Voltage --------------------------------------------------------------------18
2.4 To measure AC Current --------------------------------------------------------------------18
2.5 To measure 2 wire resistance ----------------------------------------------------------20
2.6 To measure 4 wire resistance ----------------------------------------------------------20
2.7 To measure Frequency (or Period)---------------------------------------------------21
2.8 To test continuity -------------------------------------------------------------------------22
2.9 To measure diode -------------------------------------------------------------------------23
2.10 To measure capacitance--------------------------------------------------------------------23
2.11 To measure temperature ---------------------------------------------------------------24
Chapter 3 Features and Functions
3.1 Front panel display --------------------------------------------------------------------------26

Digital Multimeter User‟s Guide
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3.1.1 Displayed message ------------------------------------------------------------------25
3.1.2 Turn off the display -----------------------------------------------------------------25
3.1.3 Shortcut keys on front panel ------------------------------------------------------ 26
3.2 Measuring configuration -------------------------------------------------------------------27
3.2.1 To set resolution --------------------------------------------------------------27
3.2.2 To set AC Filter ---------------------------------------------------------------------27
3.2.3 To set DC input impedance --------------------------------------------------------28
3.2.4 To set continuity threshold ---------------------------------------------------------28
3.2.5 To set aperture time -----------------------------------------------------------------28
3.2.6 To set temperature senor probe ---------------------------------------------------29
3.3 Math operation
3.3.1 MAX/MIN----------------------------------------------------------------------------29
3.3.2 NULL ---------------------------------------------------------------------------------30
3.3.3 dB -------------------------------------------------------------------------------------30
3.3.4 dBm------------------------------------------------------------------------------------31
3.3.5 MX+B----------------------------------------------------------------------------------31
3.3.6 %----------------------------------------------------------------------------------------32
3.3.7 Limit testing ------------------------------------------------------------------------- 32
3.4 Trigger
3.4.1 To select trigger source ------------------------------------------------------------- 33
3.4.2 Sampling numbers ------------------------------------------------------------------ 34
3.4.3 Read Hold -----------------------------------------------------------------------------34
3.5 System operation
3.5.1 Reading memory ------------------------------------------------------------------- 35
3.5.2 System beep ------------------------------------------------------------------------- 35
3.5.3 Firmware vesion inquiry ---------------------------------------------------------- 36

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3.5.4 Remote interface configuration -------------------------------------------------- 36
3.5.5 Calibration -------------------------------------------------------------------------- 37
Chapter 4 Remote Interface
4.1 SCPI language -------------------------------------------------------------------------------- 39
4.2 Command set ----------------------------------------------------------------------------------43
4.3 Simple programing ---------------------------------------------------------------------------50
4.3.1 MEASure? and CONFigure? command -------------------------------------------51
4.3.2 FUNCtion commands ----------------------------------------------------------------55
4.3.3 Math operation commands ----------------------------------------------------------57
4.3.4 Trigger ---------------------------------------------------------------------------------61
4.3.5 System commands --------------------------------------------------------------------61
4.3.6 RS-232 interface commands --------------------------------------------------------61
Chapter 5 Service and Support
5.1 Warranty ---------------------------------------------------------------------------62
5.2 Contact us -------------------------------------------------------------------------62
Chapter 6 Specifications
6.1 General Specifications ---------------------------------------------------------63
6.2 Performance Specifications -----------------------------------------------------63

Digital Multimeter User‟s Guide
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Chapter 1 Quick Start
1.1Front Panel at a Glance
①Measurement Function keys
②Auxiliary function keys
③Math Operation keys
④Config Enter keys
⑤Menu Operation keys (Range)

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1.2 Rear Panel at a Glance
①RS232 interface connector
②USB interface connector
③Power socket
④GPIB interface connector
⑤Power-Line Voltage Settting Switch
1.3 Display Annunciators

Digital Multimeter User‟s Guide
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①Main display line
②Secondary display line
③* (Turns on during a measurement)
④Adrs (GPIB interface display)
⑤Rmt (Remote interface operation)
⑥Man (Manual ranging, autorange is disabled)
⑦Trig (Waiting for a single trigger or external trigger)
⑧Hold (Reading hold is enabled)
⑨Error (Error Queue)
⑩Mem (Turns on when reading memory is enabled)
⑪Null (Null function is enabled)
⑫Limits (Limit test function is enabled)
⑬Filter (Filter function is enabled)
⑭Shift ( “Shift” key has been pressed)
⑮Rear (Rear input terminal are selected)
⑯4W (In 4-wire ohms or temperature function)
⑰(In continuity test function)
⑱(In diode test function)
1.4 Front Panel Menu at a Glance