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Dual Measurement Multimeter GDM-834X Series USER MANUAL GW INSTEK PART NO. 82DM-83420E01 ISO-9001 CERTIFIED MANUFACTURER

GDM-834X Series User Manual 10 GETTING STARTED This chapter describes the GDM-8342 and GDM-8341 multimeters in a nutshell, including accessories,

GDM-834X Series User Manual 100 GW000-02.CSV Recommended: Deleting only the last files or all the files from a directory: GW000-00.CSV, GW000-01.C

REMOTE CONTROL 101 REMOTE CONTROL This chapter describes basic configuration of IEEE488.2 based remote control. For a command list, refer to the C

GDM-834X Series User Manual 102 Configure Remote Control Interface USB Interface The USB device port on the rear panel is used for remote control.

REMOTE CONTROL 103 6. Press Enter to confirm the baud rate settings. 7. Press EXIT to exit from the USB menu. Display Baud rate settingBaud menu

GDM-834X Series User Manual 104 Display GPIB address settingGPIB menu indicator Note GPIB Constraints  Maximum 15 devices together, at least 2/

REMOTE CONTROL 105 Return to Local Control Background When the unit is in remote control mode, the RMT icon above the main display can be seen. W

GDM-834X Series User Manual 106 COMMAND OVERVIEW The Command overview chapter lists all programming commands in functional order as well as alphab

COMMAND OVERVIEW 107 Command types There are a number of different instrument commands and queries. A command sends instructions or data to the un

GDM-834X Series User Manual 108 Short form CONF:DIOD conf:diod Square Brackets Commands that contain square brackets indicate that the contents

COMMAND OVERVIEW 109 [MIN] (Optional parameter) For commands, this will set the setting to the lowest value. This parameter can be used in place o

GETTING STARTED 11 Characteristics The GDM-8342 and GDM-8341 are portable, dual-display digital multimeters suitable for a wide range of applicati

GDM-834X Series User Manual 110 Return Message CR+ LF Message Separator EOL or ; (semicolon) Command Separator

COMMAND OVERVIEW 111 Command List Configure Commands (Display 1) CONFigure:VOLTage:DC... 116 CONFigure:VOLTage

GDM-834X Series User Manual 112 Measure Commands MEASure:VOLTage:DC? ... 123 MEASure:VOLTage:AC? ...

COMMAND OVERVIEW 113 Calculate Commands CALCulate:FUNCtion ... 130 CALCulate:FUNCtion? ...

GDM-834X Series User Manual 114 System Commands SYSTem:BEEPer:STATe ... 136 SYSTem:BEEPer:STATe? ...

COMMAND OVERVIEW 115 *STB? ... 140 *TRG ...

GDM-834X Series User Manual 116 CONFigure Commands CONFigure:VOLTage:DC Sets measurement to DC Voltage on the first display and specifies the ran

COMMAND OVERVIEW 117 CONFigure:CURRent:AC Sets measurement to AC Current on the first display and specifies range. Parameter: [None] | [Range(<

GDM-834X Series User Manual 118 CONFigure:PERiod Sets measurement to Period on the first display and specifies the range. Parameter: [None] | [Ran

COMMAND OVERVIEW 119 CONFigure:RANGe? Returns the current range on the first display. Return Parameter: DCV: 0 .5(500mV), 5(5V), 50(50V), 500(500

GDM-834X Series User Manual 12 Accessories Standard Accessories Part number Description 82DM-83420E01 User Manual CD 82DM-83421M01 Safety Inst

GDM-834X Series User Manual 120 CONFigure2:VOLTage:AC Sets measurement to AC Voltage on the second display and specifies the range. Parameter: [No

COMMAND OVERVIEW 121 CONFigure2:FREQuency Sets measurement to Frequency on the second display and specifies the range. Parameter: [None] | [Range(

GDM-834X Series User Manual 122 CONFigure2:RANGe? Returns the range of the current function on the second display. Return parameter: DCV: 0 .5(50

COMMAND OVERVIEW 123 Measure Commands MEASure:VOLTage:DC? Returns the DC voltage measurement on the first display. Parameter: [None] | [Range(<

GDM-834X Series User Manual 124 MEASure:CURRent:AC? Returns the AC current measurement on the first display. Parameter: [None] | [Range(<NRf>

COMMAND OVERVIEW 125 MEASure:CONTinuity? Returns the continuity measurement on the first display. Example: MEAS:CONT? Returns the continuity. MEAS

GDM-834X Series User Manual 126 MEASure2:CURRent:DC? Returns the DC current measurement on the second display. Parameter: [None] | [Range(<NRf&

COMMAND OVERVIEW 127 SENSe Commands [SENSe:]TEMPerature:TCOuple:TYPE Sets thermocouple type. Parameter: Type(J | K | T) Example: SENS:TEMP:TCO:TY

GDM-834X Series User Manual 128 [SENSe:]FREQuency:INPutjack Assigns an input terminal for the frequency function. Parameter: (0|1|2) 0=volt, 1=500

COMMAND OVERVIEW 129 [SENSe:]UNIT Sets the temperature unit. Parameter: C|F Example: SENS:UNIT C Sets the temperature unit to ˚C. [SENSe:]UNIT? Re

GETTING STARTED 13 Package Contents Check the contents before using the instrument. Opening the box Contents (single unit)  Main unit

GDM-834X Series User Manual 130 CALCulate Commands CALCulate:FUNCtion Sets the Advanced function. Parameter: OFF | MIN | MAX | HOLD | REL | COMP

COMMAND OVERVIEW 131 CALCulate:HOLD:REFerence Sets the percentage threshold for the Hold function. Parameter: <NRf> (0.01, 0.1, 1, 10) Examp

GDM-834X Series User Manual 132 CALCulate:LIMit:UPPer? Returns the upper limit of the compare function. CALCulate:DB:REFerence Sets the reference

COMMAND OVERVIEW 133 CALCulate:MATH:MBFactor Sets the offset factor B for math measurements. Parameter: <NRf> | MIN | MAX Example: CALC:MATH

GDM-834X Series User Manual 134 TRIGger Commands READ? Returns 1st and 2nd display value. VAL1? Returns the 1st display reading Example: SAMP:CO

COMMAND OVERVIEW 135 TRIGger:AUTO Turns Trigger Auto mode on/off. Parameters: ON | OFF Example: TRIG:AUTO OFF Turns the Trigger Auto mode off. TRI

GDM-834X Series User Manual 136 SYSTem Related Commands SYSTem:BEEPer:STATe Selects the beeper mode; no beep, beep on fail and beep on pass. Pa

COMMAND OVERVIEW 137 SYSTem:DISPlay Turns the Display on/off. Parameter: ON | OFF Example: SYST:DISP ON Turns the display on. SYSTem:DISPlay? Retu

GDM-834X Series User Manual 138 STATus Report Commands STATus:QUEStionable:ENABle Set bits in the Questionable Data Enable register. STATus:QUESt

COMMAND OVERVIEW 139 IEEE 488.2 Common Commands *CLS Clears the Event Status register (Output Queue, Operation Event Status, Questionable Event S

GDM-834X Series User Manual 14 Appearance GDM-8342/8341 Front Panel Function keys and Arrow keysDC/AC 0.5A Terminal, AMPS Fuse HolderPower Switch,

GDM-834X Series User Manual 140 *OPC Sets operation complete bit (bit0) in SERS (Standard Event Status Register) when all pending operations are c

COMMAND OVERVIEW 141 For the following command sets, please refer to the status system diagram on page 148. STAT: QUES:EVEN? STAT: QUES: ENAB STA

GDM-834X Series User Manual 142 FAQ The DMM performance doesn’t match the specifications. Make sure the device is powered On for at least 30 min

APPENDIX 143 APPENDIX System Menu Tree LEVEL 1 SYSTEM MEASTEMP I/OVER LIGHT SN LANGINJACK INPUT RGPIBPASSOFFVx.xx LIGHT:1 12345678 NORMCOMP0010 V

GDM-834X Series User Manual 144 Factory Default Settings Measurement Item DCV Range AUTO Rate S SYSTEM Menu BEEP: Pass VER: N/A

APPENDIX 145 Replacing the AC Source Fuse Fuse Ratings Type Rating 0.125AT 100VAC, 120VAC 0.063AT 220VAC, 240VAC Note Only replace the fuse with

GDM-834X Series User Manual 146 Replacing the Input Fuse Fuse Rating Type Rating T0.5A 0.5A 250V Note Only replace the fuse with a fuse of the c

APPENDIX 147 3. Replace the fuse at the end of the holder with the correct type and rating. CAT600VCOM250VWVT0.5AFUSEINPUTMAX500Vpk12AMAX750V100

GDM-834X Series User Manual 148 Status system The diagram below is a description of the status system For the following command sets, please r

APPENDIX 149 Specifications The specifications apply when the DMM is warmed up for at least 30 minutes and operates in slow rate. Below are the b

GETTING STARTED 15 WVInput Terminal CAT 600VCOM250VWVT0.5AFUSEINPUTMAX500Vpk12AMAX750V1000VMAX0.5AMAX This terminal is used for all measure

GDM-834X Series User Manual 150 DC Voltage Range Resolution Full Scale Accuracy (1 year 23˚C ±5˚C) Input Resistance 500mV 10μV 510.00 0.02%+4 10

APPENDIX 151 AC Voltage, ACV+DCV[3] (AC Coupled) Range Resolution Full Scale Accuracy (1 year 23˚C ±5˚C) [1] 30-50Hz 50-10kHz 10K-30kHz 30K-100kH

GDM-834X Series User Manual 152 Resistance Resistance Resolution Full Scale Test Current Accuracy (1 year 23˚C ±5˚C)[2] 500Ω 10mΩ 510.00 0.83mA

APPENDIX 153 Capacitance Range Resolution Full Scale Test Current Accuracy (1 year 23˚C ±5˚C) [1] 5nF: 0.5~1nF [2] 0.001nF 5.100 8.3μA 2.0%+20 5

GDM-834X Series User Manual 154 Temperature Specifications Sensor Type Measurement Range Resolution Accuracy (1 year 23˚C ±5˚C) Thermocouple J -2

APPENDIX 155 Dimensions GDM-8342/GDM-8341 DCV ACV/W/Hz/P 2NDREL MX/MN HOLD TRIG MENUEXITSHIFTRANGERANGEEnterPOWERGDM-834250000 Counts Dual Mea

GDM-834X Series User Manual 156 Declaration of Conformity We GOOD WILL INSTRUMENT CO., LTD. No. 7-1, Jhongsing Rd, Tucheng Dist., New Taipei City

INDEX 157 INDEX Accessories ... 12 Advanced measurement compare ...70 dB_...

GDM-834X Series User Manual 158 overview ... 22 Refresh rate ... 31 Remote contr

GDM-834X Series User Manual 16 Measurement Keys The top row of measurement keys are used for basic DMM measurements such as voltage, current, resi

GETTING STARTED 17 Resistance/ Continuity) /WdB Measures resistance or continuity, depending on the selected mode. See page 43 and 48, respective

GDM-834X Series User Manual 18 Lower Measurement keys REL RELREL# Measures the Relative value (page 67). REL# (SHIFT→REL) SHIFTEXIT→RELREL# Manual

GETTING STARTED 19 MENU MENUUSB STO Enters the configuration menu for System Settings, Measurement Settings, Temperature measurement settings, I/O

This manual contains proprietary information, which is protected by copyright. All rights are reserved. No part of this manual may be photocopied,

GDM-834X Series User Manual 20 Arrow Keys RANGERANGE The arrow keys are used to navigate the menu system and edit values. The Up and Down arrow ke

GETTING STARTED 21 Secondary Measurement Units Displays the units for the secondary measurement function. Secondary Measurement function icons Di

GDM-834X Series User Manual 22 Rear Panel USB Device Port, Calibration PortPower Cord SocketFuse 0.125AT/0.063ATCALIBRATIONSER.NO. LABEL50 / 60 Hz

GETTING STARTED 23 Fuse Socket 100220120240 Holds the main fuse: 100/120 VAC: 0.125AT 220/240 VAC: 0.063AT For fuse replacement details, see page

GDM-834X Series User Manual 24 Set Up Tilting the Stand From the base of the handle, gently pull the handle out sideways and then rotate it to on

GETTING STARTED 25 Power Up Steps 1. Ensure the correct line voltage is lined up with the arrow on the fuse holder. If not, see page 145 to se

GDM-834X Series User Manual 26 How to Use the Instrument Background The following section will introduce to you how to access the basic functions

GETTING STARTED 27 Navigating the Menu System The menu system is navigated with the Up, Down, Left and Right arrow keys, the Auto/Enter key and th

GDM-834X Series User Manual 28 Editing a Setting or Parameter When you access a menu or parameter setting, the Up, Down, Left and Right keys can b

OPERATION 29 OPERATION Basic Measurement Overview ... 31 Refresh Rate ...

Table of Contents 3 Table of Contents SAFETY INSTRUCTIONS ... 5 GETTING STARTED ...

GDM-834X Series User Manual 30 Set the Reference Junction Temperature ... 56 Dual Measurement Overview ...

OPERATION 31 Basic Measurement Overview Refresh Rate Background The refresh rate defines how frequently the DMM captures and updates measurement

GDM-834X Series User Manual 32 Reading Indicator Overview 1. The reading indicator next to the 1st display flashes according to the refresh ra

OPERATION 33 AC/DC Voltage Measurement The GDM-8342/8341 can measure from 0 to 750VAC or 0 to 1000VDC, however the CATII measurement is only rated

GDM-834X Series User Manual 34 CAT 600VCOM250VWVT0.5AFUSEINPUTMAX500Vpk12AMAX750V1000VMAX0.5AMAX

OPERATION 35 Select the Voltage Range The voltage range can be set automatically or manually. Auto Range To turn the automatic range selection O

GDM-834X Series User Manual 36 For example: A+5V 0V-5VC DBEDC 5V Range A,B: Input exceeds the ADC dynamic range. C,D: The DCV offset causes the

OPERATION 37 Voltage Conversion Table This table shows the relationship between an AC and DC reading for various waveforms. Waveform Peak to Pea

GDM-834X Series User Manual 38 Crest Factor Table Background Crest factor is the ratio of the peak signal amplitude to the RMS value of the signa

OPERATION 39 AC/DC Current Measurement The GDM-834X series DMMs have two input terminals for current measurement. A 0.5A terminal for current less

GDM-834X Series User Manual 4 Frequency/Period Input Jack Settings ... 80 Compatibility Settings ... 81 Restore F

GDM-834X Series User Manual 40 CAT 600VCOM250VWVT0.5AFUSEINPUTMAX500Vpk12AMAX750V1000VMAX0.5AMAXMax 12AMax 0.5A

OPERATION 41 Select the Current Range The current range can be set automatically or manually. Auto Range To turn the automatic range selection O

GDM-834X Series User Manual 42 For example: A+5A 0V-5AC DBEDC 5A Range A,B: Input exceeds the ADC dynamic range. C,D: The DCI offset causes the

OPERATION 43 Resistance Measurement Set to Ω Measurement 1. Press the Ω/ key to activate resistance measurement. Note: pressing the Ω/ key tw

GDM-834X Series User Manual 44 Select the Resistance Range The resistance range can be set automatically or manually. Auto Range To turn the aut

OPERATION 45 Diode Test The diode test checks the forward bias characteristics of a diode by running a constant forward bias current of approximat

GDM-834X Series User Manual 46 Capacitance Measurement The capacitance measurement function checks the capacitance of a component. Set to Diode M

OPERATION 47 Select the Capacitance Range The capacitance range can be set automatically or manually. Auto Range To turn the automatic range sel

GDM-834X Series User Manual 48 Continuity Test The continuity test checks that the resistance in the DUT is low enough to be considered continuous

OPERATION 49 Set Continuity Threshold The continuity threshold defines the maximum resistance allowed in the DUT when testing the continuity. Ra

Table of Contents 5 SAFETY INSTRUCTIONS This chapter contains important safety instructions that you must follow during operation and storage. Rea

GDM-834X Series User Manual 50 Continuity Beeper Settings The beeper setting defines how the GDM-8342/8341 notifies the continuity test result to

OPERATION 51 Frequency/Period Measurement The GDM-8342/8341 can be used to measure the frequency or period of a signal. Range Frequency 10Hz~5

GDM-834X Series User Manual 52 Frequency/Period Voltage Range Settings The input voltage range for frequency/period measurements can be set to Aut

OPERATION 53 Temperature Measurement The GDM-8342 can measure temperature using a thermocouple. To measure temperature, the DMM accepts a thermoco

GDM-834X Series User Manual 54 CAT 600VCOM250VWVT0.5AFUSEINPUTMAX500Vpk12AMAX750V1000VMAX0.5AMAX Set the Temperature Units Range Units ˚

OPERATION 55 Select Thermocouple Type The GDM-8342 accepts thermocouple inputs and calculates the temperature from the voltage difference of two d

GDM-834X Series User Manual 56 Set the Reference Junction Temperature When a thermocouple is connected to the DMM, the temperature difference betw

OPERATION 57 Dual Measurement Overview The dual measurement mode allows you to use the 2nd display to show another item, thus viewing two differen

GDM-834X Series User Manual 58 Using Dual Measurement Mode Procedure 1. Choose one of the basic measurement functions from the table above to se

OPERATION 59 Editing the Measurement Parameters After the secondary measurement function has been activated, the rate, range and measurement item

GDM-834X Series User Manual 6 Safety Guidelines General Guideline CAUTION  Make sure that the voltage input level does not exceed DC1000V/AC75

GDM-834X Series User Manual 60 Connection The diagrams below describe how to connect the DMM to measure a number of common dual measurement items.

OPERATION 61 Voltage/Frequency/Period and Current Measurement CAT 600VCOM250VWVT0.5AFUSEINPUTMAX500Vpk12AMAX750V1000VMAX0.5AMAXLoad0~12A0~

GDM-834X Series User Manual 62 Advanced Measurement Overview Advanced measurement mainly refers to the type of measurement which uses the result

OPERATION 63 dBm/dB/W Measurement dBm/dB Calculation Overview Using the ACV or DCV measurement results, the DMM calculates the dB or dBm value ba

GDM-834X Series User Manual 64 Display WdBSDCmdBm measurementReference resistance Setting the Reference Resistance To set the reference resistance

OPERATION 65 Measure dB dB is defined as [dBm−dBmref]. When the dB measurement is activated, the DMM calculates the dBm using the reading at the f

GDM-834X Series User Manual 66 Max/Min Measurement Maximum and Minimum measurement function stores the highest (maximum) or lowest (minimum) readi

OPERATION 67 Relative Measurement Relative measurement stores a value, typically the data at that instant, as the reference. The measurement follo

GDM-834X Series User Manual 68 Manually Set the Relative Reference Value 1. To manually set the relative reference value, press SHIFT → REL. The

OPERATION 69 Hold Measurement The Hold Measurement function retains the current measurement data and updates it only when it exceeds the set thres

SAFETY INSTRUCTIONS 7 Power Supply WARNING  AC Input voltage: 100/120/220/240 V AC  50/60Hz  The power supply voltage should not fluctuate

GDM-834X Series User Manual 70 Compare Measurement Compare measurement checks to see if the measurement data stays between a specified upper (high

OPERATION 71 the high and low limits, PASS will be displayed on the secondary display, If the reading is below the low limit, LOW will be displaye

GDM-834X Series User Manual 72 Math Measurement Math Measurement Overview Math measurement runs three types of mathematical operations, MX+B, 1/X

OPERATION 73 decimal point. 3. Press Enter to confirm the M factor settings and to automatically move onto the B offset setting. 4. Edit the B

GDM-834X Series User Manual 74 3. Press Enter to activate the 1/X math function. The results begin immediately. Display SACVSAUTOMATH1/X measur

OPERATION 75 4. Press Enter to confirm the REF% setting and to begin the Percentage measurement. Display SDCVAUTOMATHCalculated percentage meaus

GDM-834X Series User Manual 76 SYSTEM/DISPLAY CONFIGURATION View Serial Number ... 77 View V

SYSTEM/DISPLAY CONFIGURATION 77 View Serial Number Procedure 1. Press the MENU key. 2. Go to SYSTEM on level 1. 3. Go to S/N on level 2. 4. T

GDM-834X Series User Manual 78 Brightness Settings The display has 5 settable brightness levels. Range Brightness 1 (dim) ~ 5 (bright) Procedu

SYSTEM/DISPLAY CONFIGURATION 79 Input Resistance Settings The 500mV and 5V DC voltage ranges can be set to an input resistance of 10MΩ or 10GΩ. Th

GDM-834X Series User Manual 8 (Note) EN 61010-1:2010 specifies the pollution degrees and their requirements as follows. The GDM-8342/8341 falls u

GDM-834X Series User Manual 80 Frequency/Period Input Jack Settings The INJACK settings set which input terminal is used for frequency or period m

SYSTEM/DISPLAY CONFIGURATION 81 Compatibility Settings Changing the Compatibility Setting The GDM-8341/8342 can be set to a special compatibility

GDM-834X Series User Manual 82 Restore Factory Default Settings The factory default settings can be restored at anytime from the System menu. Plea

USB STORE 83 USB STORE The GDM-8342 is able to save/log measurement results to a USB stick. Please note that this function is not available for t

GDM-834X Series User Manual 84 USB Store Overview The GDM-8342 is able to store measurement results to a USB stick. The USB storage function also

USB STORE 85 1st Unit The units for the reading on the primary display. 2nd Value The reading on the secondary display. 2nd Unit The units f

GDM-834X Series User Manual 86 example, if 102000 counts are logged, 3 files will be created: GW000\GW000-00.CSV (counts 1~50000), GW000\GW000-01.

USB STORE 87 Advance Mode Users can make detailed settings by themselves in this mode. Advance mode is more flexible, so it is comparatively more

GDM-834X Series User Manual 88 Long Record Mode Overview If users need long-term data records, the Long Record Mode can be used to log test data

USB STORE 89 Display Operator mode settingOperator mode menu indicator View the Store Function Status Overview The USB Status menu can be used to

SAFETY INSTRUCTIONS 9 Power cord for the United Kingdom When using the unit in the United Kingdom, make sure the power cord meets the following sa

GDM-834X Series User Manual 90 S-FILE Shows the filename of the first log file of the present record. E-FILE Shows the filename of the last lo

USB STORE 91 Set the Starting File Name (Available only in Advance Mode ) Overview The GDM-8342 will allow you to set the value of the starting f

GDM-834X Series User Manual 92 until the USB store function is turned off. This setting will appear automatically after the USB Store function ha

USB STORE 93 Time Mode (Available only in Advance Mode) Range TIME CURRENT, RESTART Default RESTART Overview The Time Mode setting designates

GDM-834X Series User Manual 94 Overview The timer setting sets the “current” timer time that is used to time stamp readings when saving to USB. By

USB STORE 95 Date Range Date 13.03.01 ~ 99:12:31 (Year:Month:Day) Default 13.03.01 Overview The date setting sets the date-stamp for any CSV

GDM-834X Series User Manual 96 Save to USB Overview The USB STO option allows the GDM-8342 to store each measurement reading to a USB stick. The

USB STORE 97 5. The USB stick can now be removed or another save operation can be performed. WARNING Do not remove the USB stick while the DMM

GDM-834X Series User Manual 98 FILE (Existing File, see page 92) NAME (File Name, see page 91) COUNT (Count, see page 91) TMODE (Time Mode, see p

USB STORE 99 Note About Deleting Files or Directories on the USB Stick Note If you find the need to delete files or directories that have already