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GW Instek GDM-8246 Manual
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GDM-8246 MULTIMETER
PROGRAMMER MANUAL
CONTENTS
1. INTRODUCTION............................................................................. 1
2. CONNECTING DMM VIA GPIB INTERFACE.................. 2
3. CONNECTING DMM VIA RS232 INTERFACE................ 5
4. INPUT AND OUTPUT QUEUE...................................... 8
5. COMMANDS AND SYNTAX........................................ 8
6. DETAILS OF COMMAND REFERENCE........................ 21
7. STATUS AND ERROR REPORTING............................... 46
1
PAGE
GDM-8246 MULTIMETER
PROGRAMMER MANUAL
1. INTRODUCTION
In the modern automatic measurement system, communication
between equipments and computers is essential. The measured
procedures can be varied with user's testing programs, therefore, the
Digital Multimeter can be operated remotely from an instrument
controller or computer across the RS232 interface (optional) or GPIB
(optional).
Interface selection and setup
Press [SHIFT][SET] in sequence into SET mode, then press [RS-232] or
[GPIB] the white characters with blue background to set the RS232 OR
GPIB interface. If the indicator of negative sine lights, the value
displayed on the front panel is the current setting value. Use [▲][▼] can
adjust the baud rate (or GPIB address). Finally, press [ENTER] to store
the setup or press [SHIFT] to cancel the setup.
1

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Summary of Contents for GW Instek GDM-8246

  • Page 1 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL 1. INTRODUCTION CONTENTS PAGE 1. INTRODUCTION................1 In the modern automatic measurement system, communication 2. CONNECTING DMM VIA GPIB INTERFACE……………... 2 between equipments and computers is essential. The measured procedures can be varied with user’s testing programs, therefore, the 3.
  • Page 2 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL 2. CONNECTING THE DIGITAL MULTIMETER VIA GPIB INTERFACE Notes for GPIB installation The GPIB interface capabilities: When the Digital Multimeter is set up with a GPIB system, please check The GPIB interface of the Digital Multimeter corresponds to the the following things: standard of IEEE488.1-1987, IEEE488.2-1992 and SCPI-1994.
  • Page 3 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL THE DIGITAL MULTIMETER 3. CONNECTING The GPIB connection testing RS232 INTERFACE If you want to test whether the GPIB connection is working or not, you can send a GPIB command from computer. For instance, the query...
  • Page 4 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Do not use more than 15m of cable to connect devices to a PC. Ensure the same baud rate is used on the device as the one used on PC terminal. EQUIPMENT...
  • Page 5 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL The RS232 connection testing SCPI If you want to test whether the RS232 connection is working or not, you can send a command from computer. For instance, using a terminal Common Command & Queries...
  • Page 6 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL command identifies it as a query. The command header is configured by header path and leaf node. Figure 5 shows the command header for the leaf node indicated in Figure 4. Layer D is interrelated with device information. Different devices have different functions.
  • Page 7 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Table 1 defines the Boolean and other parameter types for the Digital Multimeter. II. RS232 message terminators As there is no signal of end message on RS232 bus, therefore, use LF Parameter Type...
  • Page 8 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Combining Commands General Setting Commands You can use a semicolon (;) to combine commands. But continuously Table 2 lists the general setting commands that control and query the query command will cause message missing. For example: settings of the DMM.
  • Page 9 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Calculation Commands :CONFigure:SFRequency Sets frequency function. :CALCulation: LIMit:STATe? Returns Compare mode on or off. :CONFigure:RESistance <NR2> Sets resistance function and range. Sets Compare mode on or off. :CALCulation: LIMit:STATe <Boolean> :CONFigure:VOLTage:AC <NR2>...
  • Page 10 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL :CALCulation:SDMB:STATe? Returns DBM mode on or off. *SRE <NR1> Sets contents of Service Request :CALCulation: SDMB:STATe <Boolean> Sets DBM mode on or off. Enable Register (SRER). Returns the reference impedance *SRE? Returns contents of Service :CALCulation: SDMB:REFerence? value of the DBM mode.
  • Page 11 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL 6. DETAILS OF COMMAND REFERENCE Miscellaneous Commands Table 4 lists the miscellaneous commands that control general Each command in this chapter will give a detailed description. The housekeeping functions of the Digital Multimeter.
  • Page 12 GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Examples: Examples: *IDN? Returns GW_Inc, GDM-8246, FW1.00 *ESE 65 sets the ESER to binary 0100 0001. If the ESER contains the binary value 1000 0010, the *ESE? will return *OPC the value of 130. Function:...
  • Page 13 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL :CONFigure:AUTo *SRE? Returns: Function: Set or query the auto-range mode on or off. <NR1> is in the range from 0 through 255. Syntax: Examples :CONFigure:AUTo? *SRE 7 sets bits of the SRER to 0000 0111.
  • Page 14 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Examples: Table 6-2: :CONFigure:RANGe? might return 50.000 to indicate the 50V range at Calculation Function Corresponding Value DCV. Please refer to the representative unit for every function range as follows: HOLD AUTOHOLD...
  • Page 15 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Examples: DC Current AC Current :CONFigure:CONTinity sets the continuity function. AC+DC Current AC+DCA Please refer to the Table 6-1. ACA + Frequency Hz+ACA Resistance Capacitance CAPACITANCE :CONFigure:CURRent:DC <NR2> Diode DIODE Continuity CONT...
  • Page 16 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Please refer to the unit for every range shown as Table 6-1. Set the frequency function in the AC mode. Syntax: :CONFigure:CURRent:ACDC <NR2> :CONFigure:SFRequency Function: Set the AC+DC current function and range.
  • Page 17 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL :CONFigure: VOLTage:DC 12 sets the DC voltage function and 50V and 50V range. range. Please refer to the unit for every range shown as Table 6-1. Please refer to the unit for every range shown as Table 6-1.
  • Page 18 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL (query only) :READ? Syntax: :SVALue? Function: Examples: Returns the value displayed on the primary and secondary display with 14 characters totally. :SVALue? might return “ -OL- ” when the current function is in the dBm mode.
  • Page 19 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL :CALCulation:LIMit:LOWer? :CALCulation:LIMit:FAIL? Examples: :CALCulation:LIMit:LOWer <NR2> 0(low)/1(pass)/2(high) Examples: :CALCulation:LIMit:FAIL? might return 1 means the reading is pass. :CALCulation:LIMit:LOWer? might return +1.0000 in the DC voltage function. :CALCulation:LIMit:LOWer 1.0000 sets 1.0000 DC voltage at the lower :CALCulation:MAXimum limit in the DC voltage function.
  • Page 20 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL <Boolean> can be o(off) or 1(on). Examples: Examples: :CALCulation:RELation:DATa? might return +1.0000 in DC voltage function. :CALCulation:MINimum? might return 1 in the MIN mode. :CALCulation:RELation:DATa 1.0000 sets 1.0000 DC voltage at the :CALCulation:MINimum 1 sets the MIN mode.
  • Page 21 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL :CALCulation: SDBM:REFerence <NR1> :CALCulation:HOLD 1 sets the Hold mode. Examples: STATus:OPERation:CONDition? (query only) :CALCulation:SDBM:REFerence? might return 0600 in DC voltage function. Function: Return the contents of the OPERation register. The DMM, however, do :CALCulation: SDBM:REFerence 600 sets 600 ohm DC voltage at the not use the OPERation register to report any conditions.
  • Page 22 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Examples Syntax: STATus:OPERation:ENABle 32767 sets all 15 bits of the register to 1. STATus:QUEStionable:CONDition? If the STATus:OPERation:ENABle? returns 0, all 15 bits of the register Returns: are 0. <NR1> STATus:OPERation:EVENt (query only) Examples: STATus:QUEStionable:CONDition? returns 0.
  • Page 23 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL STATus:QUEStionable:EVENt(query only) SYSTem:VERSion? (query only) Function: Function: Return and clear the contents of the QUEStionable register. The response Return the SCPI version of the device. is a decimal value that summarizes the binary values of the set bits.
  • Page 24 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL 7. STATUS AND ERROR REPORTING QUEStionable Status A set of status registers allows the user to quickly determine the Voltage Overload Current Overload DMM’s internal processing status. The status register, as well as the...
  • Page 25 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Table 4: QUEStionable Status Register To SBR Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 ∗ Limit Test Limit Test Capacitance Event Enable Condition...
  • Page 26 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Status Registers Use the serial poll or the *STB? Query to read the contents of the SBR. The bits in the SBR are set and cleared depending on the contents of the...
  • Page 27 GDM-8246 MULTIMETER GDM-8246 MULTIMETER PROGRAMMER MANUAL PROGRAMMER MANUAL Queues Event Status Enable Register (ESER) OPERation Enable Register The output queue is included to power supplies. QUEStionable Enable Register Output Queue: The DMM store query responses in the output queue by Service Request Enable Register (SRER) succeeding the IEEE 488.2 protocol.
  • Page 28 GDM-8246 MULTIMETER PROGRAMMER MANUAL ⎯ 54 ⎯...