Gw-instek GDM-8261A User manual Uživatelský manuál

Dual Measurement Multimeter GDM-8261A USER MANUAL GW INSTEK PART NO. 82DM-8261AEC1 ISO-9001 CERTIFIED MANUFACTURER

GDM-8261A User Manual 10 GETTING STARTED This chapter describes the GDM-8261A in a nutshell, including an Overview of its main features and front

GDM-8261A User Manual 100 Save Instrument Settings Background The GDM-8261A can save up to 5 instrument settings. The settings can save the sta

STORE/RECALL 101 1st display Shows the memory number 4. Select the memory number using the Up/Down key or select Del-All to delete the sav

GDM-8261A User Manual 102 3. Press the Down key to enter the Recall menu. 1st display Shows the memory number 4. Select the memory number

SCANNER (OPTIONAL) 103 SCANNER (OPTIONAL) The optional scanner, GDM-SC1, lets you effectively measure multiple channels connected to a single

GDM-8261A User Manual 104 GDM-SC1 Scanner Specifications 2-wire channel 16 pairs Maximum current 2Arms (ch17, ch18) 4-wire channel 8 pairs Resist

SCANNER (OPTIONAL) 105 3. The connection terminals are revealed. Overview 16 general purpose channels are available, 8 on the left row,

GDM-8261A User Manual 106 Temp. 2W RTD 2 wires (H, L) 16 (CH1 ~ 16) Temp. 4W RTD 4 wires (Input H, L + Sense H, L) 8 pairs (CH1 [input]& 9[s

SCANNER (OPTIONAL) 107 Enable scanner (Jumper J9) Set the jumper J9 on the rear side of the board accordingly. Move the jumper up (pins 3-2)

GDM-8261A User Manual 108 2. Route the wires as shown below via the two openings (left and right) at the front cover. Note When using thermoco

SCANNER (OPTIONAL) 109 4. Close the top cover and tighten the screw from the bottom. Configuration Record Print out the configuration recor

GETTING STARTED 11 GDM-8261A Characteristics The GDM-8261A is a portable, dual-display digital multimeter suitable for a wide range of applic

GDM-8261A User Manual 110 Insert Scanner Power Off Turn the Power Off and take out the power cord. Open the GDM-8261A rear panel slot Take o

SCANNER (OPTIONAL) 111 Insert the scanner Insert the scanner bottom-side-up (already configured according to the procedures on page 104) into

GDM-8261A User Manual 112 Scanner Configuration Record Channel Wire color Measurement type Note CH1 H L CH2 H L CH3 H L CH4 H L CH5 H L

SCANNER (OPTIONAL) 113 Setup Scan Overview Scan type Simple Sets the scanned channel range, loop count, and timer length. All channels have a

GDM-8261A User Manual 114 1Count# 32 4 5 6 7 8 9 10 11 12Delay DelayTimer TimerScanCH101CH 102CH 103CH 104CH101CH 102CH 103CH 104CH101CH 102CH 10

SCANNER (OPTIONAL) 115 3. Press the Down key again. The Starting (Minimum) channel setting appears. 4. Move the cursor to the channel u

GDM-8261A User Manual 116 9. Press the Enter key. The loop (step) Count setting appears. AUTOENTER 10. Move the cursor to the count number u

SCANNER (OPTIONAL) 117 4. Move the cursor to the channel using the Left/Right key, and change the value using the Up/Down key. HOLD TRIG

GDM-8261A User Manual 118 Range 1 ~ 999 10. Move the cursor to the count number using the Left/Right key, and change the value using the Up/

SCANNER (OPTIONAL) 119 Use External Trigger Background The GDM-8261A uses the internal trigger by default. Using an external trigger allows c

GDM-8261A User Manual 12 Front Panel Overview TEMP/Hz/P2/4WACV DCV ACI DCIHOLD MX/MNRELTRIGAUTO 2NDSENSORdBMATHSTORE dBmSTEPSCAN RECALLMENUREL# FI

GDM-8261A User Manual 120 Run Scan Overview Scan operation type Scan Measures all the specified channel ranges at each trigger event. The timer s

SCANNER (OPTIONAL) 121 Recall Scan/Step Result Panel operation 1. After the Scan/Step is completed, the data is stored internally. Press the

GDM-8261A User Manual 122 3. Press the Down key. The channel selection appears. 4. Move the cursor to the channel using the Left/Right ke

DIGITAL I/O 123 DIGITAL I/O The rear panel Digital I/O terminal outputs the result of Compare measurements to external devices. HOLDCOMP

GDM-8261A User Manual 124 Digital I/O Terminal Configuration Background The digital I/O terminal outputs the result of Compare measurements to c

DIGITAL I/O 125 Pin5 PASS signal Output. Activates when the compare result is PASS. Pin6 FAIL signal Output. Activates when the compare resu

GDM-8261A User Manual 126 2. Change the parameter using the Up/Down key. 3. Press the Enter key to confirm editing and move to the low limi

DIGITAL I/O 127 Digital I/O: FAIL Out (Pin 6) and LOW Limit FAIL Out (Pin 8) are activated. Pass If the 2nd display shows Pass, the result

GDM-8261A User Manual 128 Application: External trigger Background The GDM-8261A uses the internal trigger by default, for example to count the f

DIGITAL I/O 129 2. Start trigger Press the Trig key to start triggering manually. The indicator turns On. VmSAUTOAC TRIG Reading indicator

GETTING STARTED 13 Sense HI Terminal W4WSENSEHI Accepts HI sense line in 4W resistance measurement. For details, see page 34. Input LO Termina

GDM-8261A User Manual 130 REMOTE CONTROL Interface Overview ... 132 Configure USB In

REMOTE CONTROL 131 TRIGger Commands ... 197 SYSTem Related Commands ...

GDM-8261A User Manual 132 Configure Interface Overview Interface type USB Device USB 1.1 or 2.0, TypeA, female connector. RS-232C D-sub 9 pin, m

REMOTE CONTROL 133 3. Press the Down key. The USB ON/OFF selection appears. 4. Press the Up/Down key to select ON or OFF. 5. Press t

GDM-8261A User Manual 134 4. Press the Down or UP keys repeatedly to select the baud rate. 2304001152005760038400192009600 5. Press th

REMOTE CONTROL 135 Configuration 1. Press the Shift key, the 2nd (Menu) key, the left key repeatedly until the TX TERM configuration menu app

GDM-8261A User Manual 136 Configuration 1. Press the Shift key, the 2nd (Menu) key, the left key repeatedly until the TX TERM configuration menu

REMOTE CONTROL 137 Format Description Example V Value +0.503E-4 V+U Value, Unit +0.503E-4, V DC V+C Value, Count# +0.503E-4, +00001# V+U+C Val

GDM-8261A User Manual 138 Insert GPIB Card Power Off Turn the Power Off and take out the power cord. Open the GDM-8261A optional communicati

REMOTE CONTROL 139 Power On Connect the power cord and turn On the power. Configure GPIB Interface GPIB port configuration 1. Press the

GDM-8261A User Manual 14 SHIFT → DCV (STEP) / EXITSHIFTDCVSTEP Starts the step measurement (page 113) using the optional scanner. ACI ACI Measures

GDM-8261A User Manual 140 5. To continue to the GPIB address configuration, press the Enter key. The GPIB address configuration menu appears. AU

REMOTE CONTROL 141 9 IFC 21 Ground (IFC) 10 SRQ 22 Ground (SRQ) 11 ATN 23 Ground (ATN) 12 SHIELD Ground 24 Single GND Insert Ethernet Card Po

GDM-8261A User Manual 142 Insert the Ethernet card Insert the Ethernet card into the slot. Close the cover by tightening the screws. Power On Con

REMOTE CONTROL 143 2. Press the Down key and the Left key repeatedly until LAN selection display appears. Note: The LAN menu will be selecta

GDM-8261A User Manual 144 Configure Ethernet Interface (RESET) Background The RESET command is used to reset the Ethernet card when new setting

REMOTE CONTROL 145 4. Press the Up/Down key to select YES or NO. YES will reset the Ethernet card, NO will cancel resetting the card. 5.

GDM-8261A User Manual 146 2. Press the Down key and the Right key. The DHCP selection display appears. TRIG 3. Press the Down key. The DHC

REMOTE CONTROL 147 2. Press the Down key and the Right key twice. The IP selection display appears. Note: The IP address can only be edit

GDM-8261A User Manual 148 7. Repeat steps 4 to 6 for IP2, IP3 and IP4. 8. Press the Exit key to exit from the configuration menu. / EXITSHIFT

REMOTE CONTROL 149 4. Use the Left/Right keys to move the cursor to the S1 value and select a digit. HOLD TRIG 5. Press the Up/Down ke

GETTING STARTED 15 SHIFT + Hz/P (dB) / EXITSHIFTHz/PdB Measures dB (page 59). TEMP (Temperature) TEMP Measures Temperature (page 43). SHIFT +

GDM-8261A User Manual 150 2. Press the Down key and the Right key repeatedly until the GATEWAY selection display appears. Note: The gateway can

REMOTE CONTROL 151 8. Press the Exit key to exit from the configuration menu. / EXITSHIFT 4. DNS Configuration 1. Press the Shift key, the

GDM-8261A User Manual 152 5. Press the Up/Down key to edit the selected digit. 6. Press the Enter key to confirm and automatically go o

REMOTE CONTROL 153 3. Press the Down key. The MAC address appears. 4. Press the Exit key to exit from the configuration menu. / EXITS

GDM-8261A User Manual 154 3. Press the Down key. The Telnet port appears. 4. Change the telnet port using the Left/Right and Up/Down keys. HO

REMOTE CONTROL 155 Return to Initial Settings 1. Press the Shift key, the 2nd (Menu) key, and the Left key repeatedly until the SET LAN con

GDM-8261A User Manual 156 Note If the GDM-8261A is returned to the initial settings, a reset is performed automatically (page 144) after exitin

REMOTE CONTROL 157 3. Press the Down key. The WEB PW ON/OFF selection appears. 4. Press the Up/Down key to select ON or OFF. When set

GDM-8261A User Manual 158 3. Run this query via the terminal application: *idn? The command will return the instrument manufacturer, model numbe

REMOTE CONTROL 159 Web Control Interface The web control interface is accessible with the optional Ethernet card. The web control interface al

GDM-8261A User Manual 16 Measurement Keys (lower row) AUTO/ENTER AUTOENTER As the AUTO key, selects the measurement range automatically. As the E

GDM-8261A User Manual 160 Note If the password dialog box or the Welcome Page fail to appear when WEB PW is set to ON, please ensure JavaScript

REMOTE CONTROL 161 3. View and Modify LAN Configuration The current Ethernet settings can be viewed and modified from the web control interfac

GDM-8261A User Manual 162 3. The View & Modify Configuration page allows you to:  View the instrument name, firmware revision of the E

REMOTE CONTROL 163 Command Syntax The commands are partially compatible with IEEE488.2 (1992) and SCPI (1994) standard. Commands are NON-case

GDM-8261A User Manual 164 Message Separator EOL or , Command separator, user configurable (excluding GPIB), see page 135. Square Brackets [ ]

REMOTE CONTROL 165 CONFigure2:FUNCtion? ... 176 CONFigure2:RANGe? ...

GDM-8261A User Manual 166 [SENSe:]TEMPerature:FRTD:TYPE? ... 182 [SENSe:]TEMPerature:FRTD:AL

REMOTE CONTROL 167 [SENSe:]DIGital:SHIFt? ... 186 [SENSe:]UNIT...

GDM-8261A User Manual 168 [SENSe:]VOLTage:DC:RESolution? ... 190 [SENSe:]VOLTage:AC:RESolut

REMOTE CONTROL 169 CALCulate:REL:REFerence? ... 195 CALCulate:LIMit:LOWer ..

GETTING STARTED 17 SHIFT → REL (RELative base) / EXITSHIFTRELREL# Manually sets the reference value for the Relative value measurement (page 6

GDM-8261A User Manual 170 TRIGger:COUNt? ... 199 TRACe:DATA? ...

REMOTE CONTROL 171 *OPC ... 204 *PSC?...

GDM-8261A User Manual 172 CONFigure Commands CONFigure:VOLTage:DC Sets measurement to DC Voltage on the first display and specifies range/resolut

REMOTE CONTROL 173 CONFigure:FRESistance Sets measurement to 4W Resistance on the first display and specifies the range/resolution. Parameter:

GDM-8261A User Manual 174 CONFigure:TEMPerature:RTD Sets the measurement mode to 2W RTD measurement mode on the first display. Sets the sensor typ

REMOTE CONTROL 175 CONFigure2:VOLTage:AC Sets measurement to AC Voltage on the second display and specifies range/resolution. Parameter: [None

GDM-8261A User Manual 176 CONFigure2:FREQuency Sets measurement to Frequency on the second display and specifies range/resolution. Parameter: [Non

REMOTE CONTROL 177 Measure Commands MEASure:VOLTage:DC? Returns the DC voltage measurement on the first display. Parameter: [None] | [Range(&

GDM-8261A User Manual 178 MEASure:FRESistance? Returns the 4W resistance measurement on the first display. Parameter: [None] | [Range(<NRf>

REMOTE CONTROL 179 MEASure:TEMPerature:FRTD? Returns the 4W RTD temperature for the selected sensor type on the first display. Parameter:[NONE

GDM-8261A User Manual 18 Rear Panel Overview RS232CAL KEYDIGITAL I / OSER.NO. LABEL50 , 60 , 400Hz25VA MAX.LINE RATINGFUSE LINE100VAC120VAC220

GDM-8261A User Manual 180 MEASure2:RESistance? Returns the 2W resistance measurement on the second display. Parameter: [None] | [Range(<NRf>

REMOTE CONTROL 181 [SENSe:]TEMPerature:RJUNction:SIMulated Set temperature simulation value. Parameter: <NRf>(0.00 ~ 50.00) Example: SEN

GDM-8261A User Manual 182 [SENSe:]TEMPerature:FRTD:TYPE Sets the 4W RTD sensor type. Parameter: Type(PT100 | D100 | F100 | PT385 | PT3916 | USER)

REMOTE CONTROL 183 [SENSe:]AVERage:TCONtrol Selects the digital filter. Parameter: MOV | REP Example: SENS:AVER:TCON MOV Sets the digital filt

GDM-8261A User Manual 184 [SENSe:]FILTer:STATe Turns the analog filter On/Off. Parameter: ON | OFF Example: SENS:FILT:STAT ON Turns the analog f

REMOTE CONTROL 185 [SENSe:]PERiod:INPutjack? Returns the assigned input port used for the period function. Return Parameter: VOLT, 1A, 10A [SE

GDM-8261A User Manual 186 [SENSe:]CURRent:DETect? Returns the auto-detect status for the current functions. Return Parameter: 0|1 1=ON, 0=OFF [

REMOTE CONTROL 187 [SENSe:]VOLTage:DC:RANGe? Returns the DC Voltage measurement range. Parameter: [None] | [MIN | MAX] [SENSe:]VOLTage:AC:RANG

GDM-8261A User Manual 188 [SENSe:]FRESistance:RANGe Sets the 4W resistance measurement range. Parameter: Range(<NRf> | MIN | MAX) Example:

REMOTE CONTROL 189 [SENSe:]VOLTage:AC:RANGe:AUTO? Returns the AC voltage Auto-range settings. Return parameter: 0|1, 0=OFF, 1=ON [SENSe:]CURRe

GETTING STARTED 19 USB device port Accepts a USB device cable for remote control; Type A, female connector. For remote control details, see p

GDM-8261A User Manual 190 [SENSe:]FREQuency:VOLTage:RANGe:AUTO Sets the Frequency Auto-range settings on/off. Parameter: ON|OFF Example: SENS:FREQ

REMOTE CONTROL 191 [SENSe:]CURRent:DC:RESolution? Returns the DC Current resolution. Parameter: [None] | [MIN | MAX] [SENSe:]CURRent:AC:RESolu

GDM-8261A User Manual 192 [SENSe:]DIODe:RESolution Sets the Diode measurement resolution. The resolution depends on the rate and range settings. P

REMOTE CONTROL 193 [SENSe:]VOLTage:DC:NPLCycles Sets the integration time for DC Voltage measurements in PLCs (power line cycles). Where one P

GDM-8261A User Manual 194 [SENSe:]FRESistance:NPLCycles Sets the integration time for 4W resistance measurements in PLCs (power line cycles). Wher

REMOTE CONTROL 195 CALCulate:HOLD:REFerence? Returns the percentage threshold from the Hold function. CALCulate:REL:REFerence Sets the referen

GDM-8261A User Manual 196 CALCulate:STORe:COUNt Set the number of measurement counts that are recorded with the Store measurement function. Para

REMOTE CONTROL 197 CALCulate:MATH:MMFactor Sets the scale factor M for math measurements. Para meter: <NRf> | MIN | MAX Example: CALC:MA

GDM-8261A User Manual 198 VAL1? Returns the 1st display reading in the unit format specified in the Configuration menu (Return Format, page 136) o

REMOTE CONTROL 199 TRIGger:AUTO? Returns the Trigger Auto mode. Return parameter: 0|1, 0=OFF, 1=ON SAMPle:COUNt Sets the number of samples.

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

GDM-8261A User Manual 20 Set Up Tilt Stand Tilt stand steps Pull out the handle sideways and rotate it. Place the unit horizontally, Or in

GDM-8261A User Manual 200 SYSTem Related Commands SYSTem:BEEPer:STATe Selects the beeper mode; no beep, beep on fail and beep on pass. Parame

REMOTE CONTROL 201 SYSTem:OUTPut:FORMat? Returns the output format. Return parameter: (0|1|2|3) (0=V, 1=V+U, 2=V+C, 3=V+U+C) SYSTem:OUTPut:EOF

GDM-8261A User Manual 202 SYSTem:SCPi:MODE Sets the SCPI mode. The SCPI mode is used to determine whether the *IDN? query returns the “Normal” or

REMOTE CONTROL 203 STATus Report Commands STATus:QUEStionable:ENABle Set bits in the Questionable Data Enable register. STATus:QUEStionable:E

GDM-8261A User Manual 204 *ESR? Returns SESR (Standard Event Status Register) contents. Example: *ESR? >198 Returns 198. SESR=1100011

REMOTE CONTROL 205 ROUTe Commands ROUTe:CLOSe Close a specified scanner channel. Parameter: <NR1>(101~118) Example: ROUT:CLOS 102 Clo

GDM-8261A User Manual 206 ROUTe:CHANnel Advanced configuration mode for the scanner channels. The channel function, voltage and Auto-range mode ca

REMOTE CONTROL 207 ROUTe:ADVance Turns the scanner Advanced mode on/off. Parameter: ON|OFF Example: ROUT:ADV OFF Turns advanced scanner mode o

GDM-8261A User Manual 208 FETCh? Transfer the stored readings to the output buffer. DATA:POINts? Returns the number of readings. Parameter: None |

FAQ 209 FAQ ● I pressed the EXIT key but cannot get out of Scanner mode. ● The GDM-8261A performance does not match the specifications. I p

GETTING STARTED 21 Power Up Steps 1. Ensure the correct line voltage is lined up with the arrow on the fuse holder. If not, see page 213 to

GDM-8261A User Manual 210 2. SYST: DISP OFF 3. SYST: OUTP:FORM 0 4. TRIG:DEL 0 5. SENS:AVER:STAT OFF 6. SAMP:COUN 2400 7. VAL1 ? If the

APPENDIX 211 APPENDIX System Info Firmware Version ...212 Fuse Replacement Replace AC Source F

GDM-8261A User Manual 212 Firmware Version Background Firmware version is available from the system menu. Firmware version Shows the GDM-8261A f

APPENDIX 213 Fuse Replacement Replace AC Source Fuse Steps 1. Take off the power cord and remove the fuse socket using a minus driver. 1 0 0

GDM-8261A User Manual 214 Replace Input Current Fuse Step 1. Press the Fuse holder. 2. The fuse holder comes out. Replace the fuse inserted

APPENDIX 215 Menu Tree Menu Tree Background The menu tree diagram shown on the next page represents the configuration menu that is accessed b

GDM-8261A User Manual 216 Configuration Menu Tree 2NDMENUMEAS SET ADC HZ/P I/OCONT D-SHIFT INPUT R AC BW I-DETSPEED A-GAING-TIMERUSB GPIBVER LIGH

APPENDIX 217 Status system The diagram below is a description of the status system For the following command sets, please refer to the di

GDM-8261A User Manual 218 Specifications General Note  All specifications are ensured only under a single display.  At least 1 hour of warm-

APPENDIX 219 DC Characteristics [3] DC Voltage [1] Range [4] 24 Hour 23˚C±1˚C 90 Day 23˚C±5˚C 1 Year 23˚C±5˚C Temperature Coefficient/˚C [6]

GDM-8261A User Manual 22 7. Then the default setting appears. Example: DCV, Auto, 100mV range VmSDCAUTO

GDM-8261A User Manual 220 Measuring Characteristics DC Voltage Input Resistance Range 0.1V 10MΩ or >10GΩ Selectable 1V 10MΩ or >10GΩ S

APPENDIX 221 function. Without REL function, add 0.2 Ω additional error in 2-wire ohms function. [ 6 ] 0˚C~18˚C, 28˚C~55˚C [ 7 ] Accuracy sp

GDM-8261A User Manual 222 10.00000 mA 3Hz – 5Hz 1.1 + 0.06 1.1 + 0.06 1.1+0.06 0.2+0.006 5Hz – 10Hz 0.35 + 0.06 0.35 + 0.06 0.35+0.06 0.1+0.006

APPENDIX 223 Measuring Characteristics True RMS AC Voltage Measurement Method: AC-coupled True RMS – measures the ac component of input with

GDM-8261A User Manual 224 [ 10 ] All speeds need Fixed range and Trigger Delay=0. Frequency and Period Characteristics Frequency Period [3] [7]

APPENDIX 225 [ 6 ] Need Fixed ACI/ACV range and Trigger Delay=0. [ 7 ] To meet the specifications accuracy, Slow rate setting is needed. Tempe

GDM-8261A User Manual 226 Dimensions 22088220264.4350.310788309.18.416325.176.815.75710.7201.951019 7019 19All dimensions are shown in millimeter

APPENDIX 227 EC Declaration of Conformity We GOOD WILL INSTRUMENT CO., LTD. (1) No.7-1, Jhongsing Rd., Tucheng Dist., New Taipei City, Taiwan

GDM-8261A User Manual 228 INDEX A AC bandwidth setting ... 86 ADC speed setting ...

INDEX 229 Gateway ... 149 Initial settings ... 154 IP 1

BASIC MEASUREMENT 23 BASIC MEASUREMENT ACVDCVACIDCI2/4W/Hz/PTEMP Overview Basic Measurement Overview ... 25 Ref

GDM-8261A User Manual 230 triggering ... 119 Scanner configuration record/log ... 112

GDM-8261A User Manual 24 Temperature Temperature Measurement ... 43 Select Thermocouple Type ...

BASIC MEASUREMENT 25 Basic Measurement Overview Background Basic measurement refers to the eight types of measurements assigned to the upper

GDM-8261A User Manual 26 Refresh Rate Function S M F (Readings/s) Continuity / Diode 100 200 300 DCV/DCI/100Ω~ 100MΩ (Accurate) 5 60 240 DCV

BASIC MEASUREMENT 27 Manual/Automatic Triggering Automatic triggering (default) The GDM-8261A triggers according to the refresh rate. See the

GDM-8261A User Manual 28 Select Voltage Range Auto range To turn the automatic range selection On/Off, press the AUTO key. AUTO Manual range Pres

BASIC MEASUREMENT 29 The DC voltage range should be manually selected when any of the following conditions are true: 1. When DCV measureme

Table of Contents 3 Table of Contents SAFETY INSTRUCTIONS ... 6 Safety Symbols ...

GDM-8261A User Manual 30 Voltage Conversion Table This table shows the relationship between AC and DC reading in various waveforms. Waveform Peak

BASIC MEASUREMENT 31 Crest Factor Table Background Crest factor is the ratio of the peak signal amplitude to the RMS value of the signal. It

GDM-8261A User Manual 32 AC/DC Current Measurement Background The GDM-8261A has two input ports for current measurement. A 1A terminal for curren

BASIC MEASUREMENT 33 Select Current Range Auto range To turn the automatic range selection On/Off, press the AUTO key. AUTO Manual range Pres

GDM-8261A User Manual 34 The DC current range should be manually selected when the following conditions are true: 1. When DCI measurement is u

BASIC MEASUREMENT 35 2. 2W/4W resistance mode display appears WS2WkAUTO 2W or 4W + Ω Indicates 2W or 4W Resistance mode AUTO Indicates Autom

GDM-8261A User Manual 36 10MΩ 10Ω 11.99999MΩ 100MΩ 100Ω 119.9999MΩ Note For more detailed range, see the specifications at page 217.

BASIC MEASUREMENT 37 Diode Test Background Diode test checks the forward bias characteristics of a diode by running a constant forward bias

GDM-8261A User Manual 38 Continuity Test Background Continuity test checks that the resistance in the DUT is low enough to be considered continuo

BASIC MEASUREMENT 39 Set Continuity Threshold Background Continuity threshold defines the maximum resistance allowed in the DUT when testing

GDM-8261A User Manual 4 View Serial Number ... 75 Trigger Setting ...

GDM-8261A User Manual 40 Select Beeper Setting Background Beeper setting defines how the GDM-8261A notifies the continuity test result to the use

BASIC MEASUREMENT 41 Frequency/Period Measurement 1. Activate frequency/period measurement To measure Frequency, press the Hz/P key once. Hz/

GDM-8261A User Manual 42 Select Frequency/Period Voltage Range Frequency/Period mode To select between period/frequency voltage range, press the

BASIC MEASUREMENT 43 Temperature Measurement Background The GDM-8261A can measure temperature using either thermocouples or RTD sensors. For

GDM-8261A User Manual 44 Select Thermocouple Type Background The GDM-8261A accepts thermocouple inputs and calculates the temperature from the vo

BASIC MEASUREMENT 45        5. Confirm and go back to the default display Press the Enter key to confirm. Press the Exit key to go ba

GDM-8261A User Manual 46 2. Edit reference temperature Use the Left/Right key to move the cursor, and use the Up/Down key to change the value. Def

BASIC MEASUREMENT 47 3. Select sensor Press the Up and Down keys to highlight the RTD sensor type. RTD Type: PT 100, PT 3916, PT 385, F

GDM-8261A User Manual 48 Press the Down key twice. The RTD selection menu appears on the display. Use the Up/Down keys to select USER. 3.

DUAL MEASUREMENT 49 DUAL MEASUREMENT Dual Measurement Background The dual measurement mode allows you to use the 2nd display to show anothe

Table of Contents 5 INDEX ... 228

GDM-8261A User Manual 50 Amplifier Output INPUTV WCOMVVoTAMPVoAC NoiseDC offset DC Power Supply Output DC outputDC Power SupplyINPUTV WCOMVAC ri

DUAL MEASUREMENT 51 ACV Hz  Measure the frequency response of devices such as amplifiers or buffers*. * The frequencies of the amplifier ou

GDM-8261A User Manual 52 2nd Measurement item setting Press the 2nd key, then the target item (example: ACV). The display updates the measurement

DUAL MEASUREMENT 53 Connect the test leads and measure When using the dual measurement function, the connection method and number of test lea

GDM-8261A User Manual 54 Voltage/Frequency/Period and Current Measurement INPUTV WCOM0~10A0~1.2ALoad Note: DC Current measurements will be displ

ADVANCED MEASUREMENT 55 ADVANCED MEASUREMENT /dBmHz/PdBMX/MNFILTERRELREL#HOLDCOMPTRIGINT/EXT2/4WMATH Overview Advanced Measurement Overview

GDM-8261A User Manual 56 Advanced Measurement Overview Background Advanced measurement mainly refers to the type of measurement which uses the r

ADVANCED MEASUREMENT 57 Refresh Rate Function S M F (Readings/s) Continuity / Diode 100 200 300 DCV/DCI/100Ω~ 100MΩ (Accurate) 5 60 240 DC

GDM-8261A User Manual 58 Manual triggering Press the Trig key to trigger the measurement manually. The trigger must be set to external (EXT) for m

ADVANCED MEASUREMENT 59 Select reference resistance To change the reference resistance, press the Up/Down key. The new resistance appears in t

GDM-8261A User Manual 6 SAFETY INSTRUCTIONS This chapter contains important safety instructions that you must follow when operating the GDM-8261A

GDM-8261A User Manual 60 dB result appears dBSDCVm dB Indicates dB measurement -00.617mV Indicates the present Voltage reading dBmref Press the

ADVANCED MEASUREMENT 61 Max/Min Measurement Applicable to ACVDCVACIDCI2/4WHz/PTEMP Background Maximum and Minimum measurement stores the high

GDM-8261A User Manual 62 Relative Value Measurement Applicable to ACVDCVACIDCI2/4WHz/PTEMP Background Relative measurement stores a value, typica

ADVANCED MEASUREMENT 63 V REL Indicates Relative measurement 1st display Shows the reference value (to full scale) 2nd display Indicate

GDM-8261A User Manual 64 Hold Measurement Applicable to ACVDCVACIDCI2/4WHz/PTEMP Background The Hold Measurement function retains the current mea

ADVANCED MEASUREMENT 65 Compare Measurement Applicable to ACVDCVACIDCI2/4WHz/PTEMP Background Compare measurement checks and updates if the

GDM-8261A User Manual 66 3. Low limit setting V 1st display Shows the low limit value 2nd display Indicates low limit setting 1. Use the Left

ADVANCED MEASUREMENT 67 5. Result High If the 2nd display shows High, the result is above the High limit. Digital I/O: FAIL Out (Pin 6) a

GDM-8261A User Manual 68 Math Measurement Applicable to ACVDCVACIDCI2/4WHz/PTEMP Background Math measurement runs four types of mathematical ope

ADVANCED MEASUREMENT 69 2. Change the parameter using the Up/Down key. 3. Press the Enter key to confirm editing and move to offset setti

SAFETY INSTRUCTIONS 7 Safety Guidelines General Guideline CAUTION  Make sure that the voltage input level does not exceed DC1000V/AC750V.

GDM-8261A User Manual 70 Measure 1/X 1. Activate 1/X Press the Shift key, the 2/4W (Math) key, the Down key twice. The 1/X setting appears. / EXI

ADVANCED MEASUREMENT 71 1. Use the Left/Right key to move the cursor (flashing point) between the digits and decimal point. HOLD TRIG 2.

GDM-8261A User Manual 72 2. Set Count Press the Enter key to set the number of measurements (counts) that will be used for the Stats function.

ADVANCED MEASUREMENT 73 3. Press the Enter key to confirm editing and to start measurement. AUTOENTER 3. View Data SDC AUTOMATH 1st displ

GDM-8261A User Manual 74 SYSTEM/DISPLAY CONFIGURATION ACVDCVACIDCIAUTORATEMX/MNFILTER2NDMENU Refresh Rate Refresh Rate Setting ...

SYSTEM/DISPLAY CONFIGURATION 75 Refresh Rate Setting Background Refresh rate defines how frequently the GDM-8261A captures and updates the me

GDM-8261A User Manual 76 2. Press the Down key. The serial number is shown on the display. 1st display Shows 2 characters (AA~ZZ). 2nd

SYSTEM/DISPLAY CONFIGURATION 77 DB-9, female Digital I/O pin assignment 6FAIL Out7 8 912 3 4 5High Limit FAIL OutVCC OutNCPASS OutExternal

GDM-8261A User Manual 78 Set Trigger Delay Background Trigger delay defines the time delay between triggering and measurement start. The default

SYSTEM/DISPLAY CONFIGURATION 79 Filter Setting Digital Filter Overview Filter basics The GDM-8261A’s internal digital filter converts the ana

GDM-8261A User Manual 8 Fuse WARNING  Fuse type: 0.315AT 100/120VAC 0.125AT 220/240 VAC  Make sure the correct type of fuse is in

GDM-8261A User Manual 80 Filter count Filter count defines the number of samples to be averaged per reading. More samples offer low noise but a l

SYSTEM/DISPLAY CONFIGURATION 81 2. Select the filter type using the Up/Down key.   3. Move the cursor to filter count using the Left/R

GDM-8261A User Manual 82 Analog Filter Settings Background The analog filter is a single order low pass filter that can be turned on to attenuate

SYSTEM/DISPLAY CONFIGURATION 83 6. Press the Enter key to confirm your selection. Press the Exit key to go back to the default display. AUTO

GDM-8261A User Manual 84 4. Select the level using the Up/Down key. 5. Press the Enter key to confirm your selection. Press the Exit key to g

SYSTEM/DISPLAY CONFIGURATION 85 1st display Shows the D-Shift setting 4. Select the setting using the Up/Down keys. 5. Press the Ente

GDM-8261A User Manual 86 1st display Shows the input resistance setting 4. Select the setting using the Up/Down keys. 5. Press the Enter

SYSTEM/DISPLAY CONFIGURATION 87 3. Press the Down key. The input bandwidth setting appears. 1st display Shows the bandwidth setting 4.

GDM-8261A User Manual 88 2. Press the Right key, then the down key. Press the left key. The Current detect menu appears. TRIG HOLD 3. Pres

SYSTEM/DISPLAY CONFIGURATION 89 Buffer, A/D driver and ADC vary over time, and thus the total offset will also vary over time. Auto Zero ded

SAFETY INSTRUCTIONS 9 Power cord for the United Kingdom When using the GDM-8261A in the United Kingdom, make sure the power cord meets the fol

GDM-8261A User Manual 90 1st display Shows A-Zero setting 3. Select the setting using the Up/Down key. 4. Press the Enter key to confirm

SYSTEM/DISPLAY CONFIGURATION 91 2. Press the Down key and then the Left key twice to choose A-GAIN. Press the Down key. The A-GAIN setting a

GDM-8261A User Manual 92 ADC Speed Setting Background The analog to digital converters have a Quick and Accurate Speed setting. The ADC Speed set

SYSTEM/DISPLAY CONFIGURATION 93 4. Use the Up/Down keys to select either ACCUR or QUICK. 5. Press the Enter key to confirm your selection

GDM-8261A User Manual 94 4. Press the Enter key to confirm your selection. Press the Exit key to go back to the default display. AUTOENTER/ EXIT

SYSTEM/DISPLAY CONFIGURATION 95 Gate Time Setting Background The gate time settings determine the accuracy of the frequency and period measu

GDM-8261A User Manual 96 Identification Settings Changing the Identification String Background The *IDN? query returns the manufacturer, model nu

STORE/RECALL 97 STORE/RECALL The GDM-8261A can store and recall measurement history (for up to 9999 counts) as well as the instrument settings

GDM-8261A User Manual 98 Store Measurement Record Background The GDM-8261A can log up to 9999 measurement results (counts) which can be stored an

STORE/RECALL 99 Recall Measurement Record Background The GDM-8261A can recall previously recorded measurement results for observation and ana