GW Instek GOM-804 User Manual
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GW Instek GOM-804 User Manual

D.c. milli-ohm meter
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D.C. Milli-Ohm Meter
GOM-804 & GOM-805
USER MANUAL
GW INSTEK PART NO. 82OM-80500EA1
ISO-9001 CERTIFIED MANUFACTURER

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Summary of Contents for GW Instek GOM-804

  • Page 1 D.C. Milli-Ohm Meter GOM-804 & GOM-805 USER MANUAL GW INSTEK PART NO. 82OM-80500EA1 ISO-9001 CERTIFIED MANUFACTURER...
  • Page 2 This manual contains proprietary information, which is protected by copyright. All rights are reserved. No part of this manual may be photocopied, reproduced or translated to another language without prior written consent of the Good Will company. The information in this manual was correct at the time of printing. However, Good Will continues to improve products and reserves the right to change specifications, equipment, and maintenance procedures at any time without notice.

  • Page 3: Table Of Contents

    Table of Contents SAFETY INSTRUCTIONS ............ 5 Safety Symbols ............ 5 Safety Guidelines ..........6 GETTING STARTED ............9 GOM-804/805 Characteristics......10 Key Features ............13 Model Lineup ............ 14 Front Panel Overview ........15 TFT-LCD Overview ..........19 Rear Panel Overview ......... 21 Set Up ...............
  • Page 4 GOM-804 & GOM-805 User Manual General Commands ......... 108 Compare Commands ........112 Binning Commands ......... 117 Temperature Compensate Commands .... 122 Temperature Conversion Commands ....123 Temperature Commands ......... 125 Scan Commands ..........126 Source Commands .......... 131 Meas. Setup Commands ......... 132 System Commands..........

  • Page 5: Safety Instructions

    AFETY INSTRUCTIONS This chapter contains important safety instructions that you must follow when operating the GOM-804/805 or when keeping it in storage. Read the following before any operation to insure your safety and to keep the GOM-804/805 in the best possible condition.

  • Page 6: Safety Guidelines

    Do not disassemble the instrument unless you are  qualified as service personnel. (Note) EN 61010-1:2010 specifies the measurement categories and their requirements as follows. The GOM-804/805 doesn’t fall under category II, III or IV. Measurement category IV is for measurements performed at the ...
  • Page 7 SAFETY INSTRUCTIONS (Note) EN 61010-1:2010 specifies the pollution degrees and their requirements as follows. The GOM-804/805 falls under degree 2. Pollution refers to “addition of foreign matter, solid, liquid, or gaseous (ionized gases), that may produce a reduction of dielectric strength or surface resistivity”.
  • Page 8 GOM-804 & GOM-805 User Manual Power cord for the United Kingdom When using the instrument in the United Kingdom, make sure the power cord meets the following safety instructions. NOTE: This lead / appliance must only be wired by competent persons...

  • Page 9: Getting Started

    Please note the information in this manual was correct at the time of printing. However as GW Instek continues to improve its products, changes can occur at any time without notice. Please see the GW Instek website for the latest information and content.

  • Page 10: Gom-804/805 Characteristics

    GOM-804 & GOM-805 User Manual GOM-804/805 Characteristics GOM-804 and GOM-805 are modern high precision programmable DC Milli-ohm meters suitable for low resistance measurements of switches, relays, connectors, PCB tracks and a variety of other devices. The meters feature a color TFT-LCD screen with easy-to-read measurement results. With the easy-to-use features, superior performance and automatic test interfaces, these meters are dependable instruments for resistance measurements.
  • Page 11 20mV in this mode to prevent the oxidization layer on metal switches and connector points from breakdown. GOM-805 only. For automatic testing The GOM-804/805 has a handler Automatic interface designed for automatic testing. The handler...
  • Page 12 GOM-804 & GOM-805 User Manual  Production testing for contact resistance of switches, Applications relays, connectors, cables and printed circuit boards and other low resistance devices.  Component testing of resistors, motors, fuses and heating elements.  Incoming inspection and quality assurance testing.

  • Page 13: Key Features

    GETTING STARTED Key Features  50,000 counts  Measurement Range: 50mΩ~5MΩ  Accuracy of up to 0.05%  Compare function  Binning function  Manual or Auto-ranging  Continuous or Triggered measurement modes  Temperature measurement, temperature compensation and temperature conversion ...

  • Page 14: Model Lineup

    ✔ Interface Temperature Sensor ✔ ✔ ✔ Interface * The GOM-804G is simply the GOM-804 with the factory-installed GPIB option. Please note that the GPIB option cannot be user-installed on the GOM-804. The option must be ordered prior to purchase.

  • Page 15: Front Panel Overview

    Current source terminals: Source + and Source -. When measuring components CAUTION with polarity, connect Source+ to the positive potential and connect Source- to the negative potential of the component. Discharge any DUT before WARNING measurement to avoid damaging the GOM-804/805.
  • Page 16 GOM-804 & GOM-805 User Manual Connect the GND (ground) terminal to GND Terminal the earth ground. The GUARD terminal has the same GUARD Terminal potential as earth, but cannot be substituted for it. Connect the GUARD terminal to the cable shield layer of the GUARD test leads to help reduce noise.
  • Page 17 GETTING STARTED The Speed key toggles between 10 Speed samples per second and 60 samples per second (Slow rate and Fast rate). The REL key is used to perform a zero adjustment to the test leads or a DUT. The RT key is used to display the real-time (not averaged) measured resistance value.
  • Page 18 Enter voltmeter to measure the EMF of passive components. See page 33 for details. GOM-805 only. The drive signal is fixed to DC+ on the GOM-804. Long pressing the Range key will Range activate the auto ranging mode. The Range key in conjunction with the...

  • Page 19: Tft-Lcd Overview

    GETTING STARTED TFT-LCD Overview Function mode Range Trigger mode Rate Remote mode Average value Dry circuit Remote error Drive signal Memory REL value number Function control Main indicators measurement display Function mode settings Secondary menus The function control indicators show all the currently Function Control active settings for the selected function mode: Indicators...
  • Page 20 GOM-804 & GOM-805 User Manual Indicates that the unit is in remote control mode Indicates which memory setting Mem No. has been recalled Shows all measurement results for the selected function Main mode. Measurement Display Shows any function mode-specific settings.

  • Page 21: Rear Panel Overview

    GETTING STARTED Rear Panel Overview GPIB port RS232 port Handler/Scan/Ext I/O GPIB RS232 HANDLER / SCAN / EXT I/O 240V , 50 60Hz 25VA MAX TC SENSOR WARNING USB B TO AVOID SHOCK, REMOVE INPUTS BEFORE OPENING. port SER.NO. LABEL AC power input Temperature sensor port Accepts the power cord.
  • Page 22 GOM-804 & GOM-805 User Manual The temperature sensor input is for the TC SENSOR Temperature optional PT-100 temperature probe. Sensor Port...

  • Page 23: Set Up

    GETTING STARTED Set Up Tilt Stand To tilt, pull the legs forward, as shown below. Tilt To stand the unit upright, push the legs back under the Stand Upright casing as shown below.

  • Page 24: Power Up

    GOM-804 & GOM-805 User Manual Power Up Ensure that the input AC power voltage is within the 1. Connection range of 100~240 V. Connect the power cord to the AC Voltage input. Ensure the ground connector of the power cord is CAUTION connected to a safety ground.

  • Page 25: Wire Kelvin Connection

    GETTING STARTED 4 Wire Kelvin Connection The GOM-804/805 uses 4 wire Kelvin connections for Background accurate measurements. SOURCE Connection SOURCE SENSE SENSE Diagram GUARD shielding Description Source + The Source + terminal carries the measuring current source. It is connected to the + side of the DUT.

  • Page 26: Zeroing (Relative Function)

    GOM-804 & GOM-805 User Manual Zeroing (Relative Function) The Relative function is used to perform a zero Background adjustment on the test leads. After the Relative value is pre-set, each measurement that is displayed is equal to the actual value minus the relative preset value.

  • Page 27: Measurement

    MEASUREMENT EASUREMENT Compare Binning Enter TCONV TEMP Speed Scan Trigger Display Local Diode Drive Range Resistance Resistance Measurement ........29 Select the Resistance Range ........30 Drive Signal Measuring Signal (Drive) Overview ......31 Select Measuring Signal (Drive) ......33 Rate Select Measurement Rate ........
  • Page 28 GOM-804 & GOM-805 User Manual Temperature Temperature Compensation ........52 Compensation Temperature Temperature Conversion ........56 Conversion Measurement Average Function ........... 60 Settings Measure Delay ............61 Trigger Delay ............63 Trigger Edge ............64 Temperature Unit ........... 65 Ambient Temperature ..........66 Line Frequency ............

  • Page 29: Resistance Measurement

    MEASUREMENT Resistance Measurement Press to access the Resistance measurement 1. Select the mode. Resistance function. 2. Resistance Ohm measurement Resistance range mode display function indicator and mode appears. Ohm measurement 4-wire resistance: 3. Connect the test lead and Use the SOURCE + and the SOURCE - terminal for measure measurement, and the SENSE +, and SENSE - terminal for sensing.

  • Page 30: Select The Resistance Range

    Ohm range GOM-804 & GOM-805 User Manual Select the Resistance Range The resistance range can be used with normal resistance Background measurement as well as the temperature compensation function. Manual Press the Range key and use the up and down arrow Ohm measurement keys to manually select the resistance range.

  • Page 31: Drive Signal Measuring Signal (Drive) Overview

    DC+, DC-, Pulse, PWM, Zero. These 5 signals are described in below. The Drive function is only applicable to the GOM-805. Note The Drive signal for the GOM-804 is fixed to DC+. Default drive Open circuit ~ +6.5V signal.
  • Page 32 GOM-804 & GOM-805 User Manual A note about Thermoelectric EMF When making low resistance measurements, thermoelectric electromotive force (Vemf) can affect measurement accuracy. Vemf is created at the junction of two dissimilar metals, such as the contact point of a test lead and the pin of a DUT.

  • Page 33: Select Measuring Signal (Drive)

    DC+, DC-, Pulse, PWM, Zero. The Dive function is only applicable to the GOM-805. The drive signal for the GOM-804 is fixed to DC+. Note The Drive function cannot be used with the Scan or Diode functions.

  • Page 34: Rate Select Measurement Rate

    GOM-804 & GOM-805 User Manual Select Measurement Rate The resistance measurement speed has 2 ranges: slow and Background fast. Slow speed is the most accurate with 10 measurements/second. Fast speed has 60 measurements/second. Both have the same measurement resolution. The rate selection function is not applicable in Diode measurement mode.

  • Page 35: Display Mode Display Mode

    MEASUREMENT Display Mode The Display key can be used to toggle between the Background normal and the simplified display mode. The simplified display mode clears all text, menus and function indicators from the screen except for the measurement and measurement mode indicators. 1.

  • Page 36: Real-Time View Real-Time Measurement

    GOM-804 & GOM-805 User Manual View Real-Time Measurement When measurements are smoothed using the averaging Background function, the RT key can be used to view the real-time results in addition to the averaged results. See page 60 for Average configuration.

  • Page 37: Dry-Circuit Dry-Circuit Measurement

    MEASUREMENT Dry-Circuit Measurement The Dry Circuit measurement function is used where the Background maximum open-circuit voltage must be kept to a minimum for applications such as measuring the contact resistance of switches, relays and connectors. The GOM-805 provides a maximum of up to 20mV in this mode.

  • Page 38: Trigger Using The Trigger Function

    The GOM-804/805 can use internal or manual triggering Background for the Resistance, Temperature, Temperature Compensation, Temperature Conversion, Binning, Handler and Scan modes. By default the GOM-804/805 is set to internal triggering mode. Short press to switch to manual triggering mode. 1. Select Manual...
  • Page 39 MEASUREMENT Long press to return the triggering mode back to 3. Internal Trigger internal mode. Triggering The Int indicator will be shown on the display. Internal trigger source...

  • Page 40: Diode Diode Function

    GOM-804 & GOM-805 User Manual Diode Function The Diode function can be used to measure the forward Background bias voltage of a diode under test. 1. Select the Press to access the Diode measurement mode. Diode Diode function. 2. Diode mode Diode function appears.

  • Page 41: Compare Function

    MEASUREMENT Compare Function The compare function compares a measured value to a Background “Reference” value that has an upper (HI) and lower (LO) limit. If the measured value is within the upper and lower limit, then the measured value is judged as IN. There are three compare modes that can be used to make a judgment: ABS, △% and % modes.
  • Page 42 GOM-804 & GOM-805 User Manual The △% compare function displays the deviation of the measured value from the reference value as a percentage. { [(Measured Value-Reference)/Reference]%}. Compare function Measured value indicator Deviation of the measured value from the reference value as...
  • Page 43 MEASUREMENT Compare function Measured value indicator Measured value as a percentage of the reference value Pass/Fail judgment Reference, limits, compare mode and beep mode A measured value that falls within the upper and lower limits is considered IN (pass), a value that falls below the lower limits is considered LO, and a value that falls over the upper limit is a HI.
  • Page 44 GOM-804 & GOM-805 User Manual Use the arrow keys to navigate to the Reference setting 3. Reference and press Enter. value setting Use the left and right arrow keys to select a digit. Use the up and down arrow keys to edit the value of the selected digit and the unit.
  • Page 45 MEASUREMENT Use the arrow keys to navigate to the Beep setting. 5. Beep setting Press Enter to toggle the beep setting. Move Toggle Enter Beep setting Off, Pass, Fail Beep Setting: The Beep setting can also be set from the System>Utility>Beep>Compare menu.

  • Page 46: Binning Function

    GOM-804 & GOM-805 User Manual Binning Function The Binning function is used to grade DUTs into eight Background different bins according to 8 sets of upper and lower limits. Two compare modes can be used in this function, ABS and △% modes.
  • Page 47 MEASUREMENT For further details on the ABS or △% compare modes, Note see the description in the Compare section, page 41. Although the 8 bins have their own upper and lower 3. Reference limits, they still share a common reference value. value setting Use the arrow keys to go to the Reference setting and press Enter.
  • Page 48 GOM-804 & GOM-805 User Manual The upper limit must be higher than the lower limit. Not setting the upper limit higher than the lower limit is not Note allowed. Likewise the lower limit cannot be set higher than the upper limit.
  • Page 49 MEASUREMENT The Count display mode tabulates the results on the right-hand side of the display and shows the bin settings on the left. Tabulated result of each bin Overall results Clear results Upper and lower limits of Bin 1~8 To toggle the display mode, go to the Disp setting and press Enter.

  • Page 50: Temperature Measurement

    GOM-804 & GOM-805 User Manual Temperature Measurement The temperature measurement function uses the optional Background PT-100 temperature probe. The measured temperature is displayed on the display. For more information on the optional PT-100 sensor, see the appendix on page 150.
  • Page 51 MEASUREMENT The Ambient temperature setting should be turned off 3. Ambient when using the temperature function. Temperature From the bottom menu go to Meas. Setup > Ambient Temperature and turn the Ambient Temperature setting off. See page 66 for setting details. The temperature sensor uses the rear panel TC Sensor 4.

  • Page 52: Temperature Compensation

    GOM-804 & GOM-805 User Manual Temperature Compensation If the resistance of a DUT at a particular temperature is Background needed, the compensation function can be used. This function can simulate the resistance of a DUT at a desired temperature. If the ambient temperature and the...

  • Page 53: Temperature Function

    MEASUREMENT Press to access the Temperature Compensation 1. Select the function. Temperature Compensation The temperature-compensated resistance measurement mode will appear on the display. Temperature Extrapolated resistance compensation measurement at the desired function indicator (“correct”) temperature Ambient temperature source Ambient temperature Correct Temperature, Temperature Coefficient settings The ambient temperature can be either measured with...
  • Page 54 GOM-804 & GOM-805 User Manual Use arrow keys to go to Correct Temperature or to 3. Temperature Temperature Coefficient and press Enter to select the compensation setting. To edit the setting values use the left and right arrow keys to select a digit and use the up and down arrow keys to edit the digit.
  • Page 55 MEASUREMENT Sensor Connection: 3. Temperature compensation GPIB connection RS232 HANDLER / SCAN / EXT I/O PT-100 temperature 240V , 50 60Hz 25VA MAX sensor TC SENSOR WARNING TO AVOID SHOCK, REMOVE INPUTS BEFORE OPENING. SER.NO. LABEL Note: If the sensor is not connected, then the Ambient temperature needs to be manually set.

  • Page 56: Temperature Conversion

    GOM-804 & GOM-805 User Manual Temperature Conversion The Temperature Conversion function allows you to Background determine the temperature change of a DUT at any given resistance, if the initial temperature, the inferred zero resistance temperature for the DUT and the initial resistance of the DUT are known.
  • Page 57 MEASUREMENT Metallic conductors show increased resistivity when Common inferred temperature is increased, and likewise show reduced zero resistance resistivity when temperature is reduced. Inferred zero temperatures resistance temperature is simply the inferred temperature at which the material will have no resistance. This value is derived from the temperature coefficient of the material.
  • Page 58 GOM-804 & GOM-805 User Manual Use the arrows keys to go to Initial Resistance, Initial 2. Initial Temperature or Constant (inferred initial resistance Resistance, temperature) and press Enter. Initial Temperature and Use the left and right arrow keys to select a digit and use Constant settings the up and down arrow keys to edit the digit.
  • Page 59 MEASUREMENT DUT connection 4 wire Kelvin: SOURCE SENSE SENSE SOURCE GUARD shielding...

  • Page 60: Measurement Settings

    GOM-804 & GOM-805 User Manual Measurement Settings The following measurement settings are used to Background configure the various measurement modes. Average Function The average function smoothes measurements using a Background moving average. The average function sets the number of samples used for the moving average; a higher number results in smoother measurement results.

  • Page 61: Settings Measure Delay

    MEASUREMENT Measure Delay The Measure Delay setting inserts a delay time between Background each measurement. Measure delay is turned off by default. Measurement start with Measure delay time Test signal Measure delay time Default Measurement start time The measure delay setting is useful for measuring components that need some time to charge if the default measurement start time is not adequate.
  • Page 62 GOM-804 & GOM-805 User Manual Pressing ESC before pressing ENTER will exit the Measure Delay settings. Note...

  • Page 63: Trigger Delay

    MEASUREMENT Trigger Delay The Trigger Delay setting adds a delay to when an Background external trigger signal is recognized. Normally the external trigger is recognized when there is no contact bounce in the signal for a fixed length of time, this time is known as the bounce monitoring window.

  • Page 64: Trigger Edge

    GOM-804 & GOM-805 User Manual Use the arrow keys to turn Trigger Delay on and set the 2. Trigger Delay delay time. Press Enter to confirm the settings. setting appears Trigger Delay setting Trigger Delay OFF, ON: 0 ~ 1000ms Pressing ESC before pressing ENTER will exit the Trigger Delay settings.

  • Page 65: Temperature Unit

    MEASUREMENT Temperature Unit Temperature units can be set to Fahrenheit or Celsius for Background all temperature measurements. From one of the main screens, press 1. Select Meas. Setup Temperature Unit key so that the menu menu icon setting system at the bottom of the display has focus.

  • Page 66: Ambient Temperature

    GOM-804 & GOM-805 User Manual Ambient Temperature The Ambient Temperature setting is used to set the Background ambient (room temperature) for the Temperature Compensation or Temperature Conversion function in the absence of the PT-100 temperature sensor. See page 52 and 56 respectively for details.

  • Page 67: Line Frequency

    MEASUREMENT Line Frequency The Line Frequency setting selects the appropriate line Background filter to reduce the influence of the AC line frequency on the milliohm measurements. This setting is set to AUTO by default. From one of the main screens, press 1.

  • Page 68: Pwm Setting

    GOM-804 & GOM-805 User Manual PWM Setting The PWM setting will set the duty of the PWM Drive Background setting. The duty is set with ON and OFF times for the waveform. OFF time time See page 31 for Drive setting details.

  • Page 69: System Settings

    MEASUREMENT System Settings The System settings are used to view the system Background information, set the power on state, the remote interface, screen brightness, external interface and beep settings as well as access the calibration menu. System Information The System Information will show the manufacturer, Background model, software version and serial number of the unit.

  • Page 70: Power On Status Setup

    GOM-804 & GOM-805 User Manual Power On Status Setup The Power On Status Setup allows you to either load the Background previous settings or the default settings on startup. From one of the main screens, press 1. Select Power System...

  • Page 71: Interface

    MEASUREMENT Interface The remote interface can be set to RS232, GPIB or USB. Background The GPIB interface is only available on the GOM-804G and the GOM-805. Note From one of the main screens, press 1. Select System Interface setting key so that the menu menu icon system at the bottom of the display has focus.

  • Page 72: Brightness

    GOM-804 & GOM-805 User Manual Brightness The Brightness setting sets the backlight brightness of Background the TFT-LCD panel. From one of the main screens, press 1. Select System Brightness key so that the menu menu icon setting system at the bottom of the display has focus.

  • Page 73: User Define Pins

    MEASUREMENT User Define Pins The External I/O User Define Pin settings set the logic Background and the active level for the Define 1 and Define 2 pins on the Handler/Scan/EXT I/O port on the rear panel. The External I/O pins are used with the compare or bin functions.

  • Page 74: Handler Mode

    *The OFF operator sets the Logic as true when Operand1 is true. ** Bin O is defined as outside bin 1~ 8. The Bin logic settings are not available for the GOM-804. Note Pressing ESC before pressing ENTER will exit from the selected External I/O setting.
  • Page 75 MEASUREMENT Hold: The results of the previous tests are held until the Hold example current test has completed. EOT falling EOT rising edge edge Trigger Ready Pass Fail High New results Previous Previous results results held From one of the main screens, press 1.

  • Page 76: Beep

    GOM-804 & GOM-805 User Manual Beep The Beep setting will configure the beeper sound for the Background key presses, the Compare function and the Binning function. For the Compare and Binning function the beep can be configured to beep on a pass or fail judgment.

  • Page 77: Handler/Scan Interface

    HANDLER/SCAN INTERFACE ANDLER/SCAN INTERFACE Handler Handler Overview ........... 78 Pin Definitions for the Handler Interface ....80 Handler Interface for Binning and Compare Functions ............... 80 Scan Scan Overview ............82 Pin Definitions for the SCAN Interface ....83 Scan Interface ............83 Scan Setup .............

  • Page 78: Handler Overview

    GOM-804 & GOM-805 User Manual Handler Overview The Handler interface is used to help grade components Background based on the Compare or Binning function test results. The appropriate pins on the handler interface are active when the Compare or Binning function is used.
  • Page 79 HANDLER/SCAN INTERFACE High when the compare result is either FAIL HI or LO (fail). High when the compare result is IN PASS (pass). For the full pin definition, please refer to the table listed below. The output current from all the pins and the VINT(+5V) Note pin cannot exceed 60mA.

  • Page 80: Pin Definitions For The Handler Interface

    GOM-804 & GOM-805 User Manual Pin Definitions for the Handler Interface As this interface is used for the handler and scan functions, the interface pinout depends on the function mode. The following pinout is only applicable when using the Binning or Compare function.
  • Page 81 HANDLER/SCAN INTERFACE Bin5 High when the binning sorting result Binning is within the bin5 setting range. Userdefine2 High or low when the user define2 Compare, logic conditions are met. Binning Userdefine1 High or low when the user define1 Compare, logic conditions are met. Binning VEXT External DC Voltage, acceptable...

  • Page 82: Scan Overview

    GOM-804 & GOM-805 User Manual Scan Overview The Scan function is used to automatically bin groups of Background up to 100 components. The associated pins in the handler interface are active when the Scan function is activated. There are a total of 6 outputs, 3 inputs as well as a GND and power (+5V) pin.

  • Page 83: Pin Definitions For The Scan Interface

    HANDLER/SCAN INTERFACE Pin Definitions for the SCAN Interface As this interface is used for the handler and scan functions, the interface pinout depends on the function mode. The following pinout is only applicable when using the Scan function. HANDLER / SCAN / EXT I/O Scan Interface Name Description...

  • Page 84: Scan Setup

    GOM-804 & GOM-805 User Manual Scan Setup The Scan function sequentially scans up to 100 channels Background and grades the resistance of the DUT on each channel to a reference value. An automated handler or test fixture is required to interface the DUTs to the measurement terminals and the scan interface that controls the timing of each scan.
  • Page 85 HANDLER/SCAN INTERFACE the measured value from the reference value as a percentage. { [(Measured Value-Reference)/Reference]%}. A measured value that falls within the upper and lower limits is considered IN (pass), a value that falls below the lower limits is considered LO, and a value that falls over the upper limit is a HI.
  • Page 86 GOM-804 & GOM-805 User Manual The Channel setting sets the number of DUT channels 3. Channel that are used. setting Use the arrow keys to navigate to the Channel setting and press Enter. Use the left and right arrow keys to select a digit. Use the up and down arrow keys to edit the value of the selected digit.
  • Page 87 HANDLER/SCAN INTERFACE Scan function Measured value indicator Pass/Fail judgment Change display view Reference, limits, scan mode, current channel, measurement delay After the last SCAN test has 6. View Results finished, press the so that the menu system at the View display bottom of the display has focus.

  • Page 88: Scan Output

    GOM-804 & GOM-805 User Manual Scan Output The timing diagrams for the scan output under different Background conditions are shown below. Ready message displayed… After the manual trigger key is pressed…. Relay Relay Pass Pass High High Clock Clock STRB STRB Scan channel 1.

  • Page 89: Compatibility For Scan And Handler

    HANDLER/SCAN INTERFACE GOM-802 Compatibility for Scan and Handler Interfaces As the handler interface on GOM-802 is a 9-pin D-sub and the GOM-805 is a 25-pin D-sub, the GOM-805 handler interface cannot be used with existing GOM-802 ATE equipment or environments without modification. For backwards compatibility with the GOM-802 handler interface, please refer to the chart below: GOM-805 to GOM-802 Handler/Scan Interface...

  • Page 90: Configure Interface

    Overview models, however the GPIB interface is only applicable for the GOM-804G and GOM-805. The remote control interfaces allow the GOM-804/805 to be programmed for automatic testing. For more information on remote control programming, please see the Command Overview chapter on page 102.

  • Page 91: Install Usb Driver

    Go to the Windows Device Manager. For Windows 7 go to: Start Menu > Control Panel > Hardware and Sound > Device Manager The GOM-804/805 will appear as an unknown Virtual Com Port under “Other Devices”. Right-click Other Devices and select “Update Driver Software”.

  • Page 92: Configure Rs-232 Interface

    GOM-804 & GOM-805 User Manual Configure RS-232 Interface The GOM-804/805 can also use an RS-232C connection Background for remote control. When connecting to a PC ensure the correct baud rate, parity, data bits, stop bit and data control settings are used.

  • Page 93: Configure Gpib Interface

    HANDLER/SCAN INTERFACE Configure GPIB Interface The GPIB interface is SCPI-1994, IEEE488.1 and Background IEEE488.2 compliant. The GPIB interface is only available on the GOM-804G and GOM-805. Note Configure the interface to GPIB and set Page 71 1. Select the the GPIB address in GPIB address System>Utility>Interface menu.

  • Page 94: Using Realterm To Establish A Remote Connection

    Download Realterm and install according to the 1. Install instructions on the Realterm website. Realterm Connect the GOM-804/805 via USB (page 90) or via 2. Configure RS232 (page 92). connection If using RS232, make note of the configured baud rate.
  • Page 95 After Realterm has started, click on the Port tab. Enter the Baud, Parity, Data bits, Stop bits and Port number configuration for the connection. The Hardware Flow Control and Software Flow Control options can be left at the default settings. Press Open to connect to the GOM-804/805.

  • Page 96: Gpib Function

    Click on Send ASCII. The terminal display will return the following: GWINSTEK,GOM805,GXXXXXXXX,V1.00 (manufacturer, model, serial number, version) If Realterm fails to connect to the GOM-804/805, please 4. Errors or check all the cables and settings and try again. Problems GPIB Function Please use the National Instruments Measurement &...
  • Page 97 Step a. My System>Devices and Interfaces>GPIB0 Press the Scan for Instruments button. Step b. In the Connected Instruments panel the GOM-804/805 Step c. should be detected as Instrument 0 with the address the same as that configured on the unit.
  • Page 98 GOM-804 & GOM-805 User Manual In the NI-488.2 Communicator window, ensure *IND? is Step g. written in the Send String: text box. Click on the Query button to send the *IDN? query to the instrument. The String Received text box will display the query Step h.

  • Page 99: Save/Recall

    The save function saves the current function as well the Background settings related to that function. There are 20 memory slots that can be used to save and recall settings on the GOM-804/805. When you are in the desired function mode, press the 1. Enter the Memory menu key (if necessary) to so that the menu system at the bottom of the display has focus.
  • Page 100 GOM-804 & GOM-805 User Manual The Recall/Save Setup menu will appear. The No. setting should be already highlighted when 2. Save/ entering the Recall/Save Setup menu. If not, use the Recall/Clear Left/Right arrow keys to highlight the No. setting. Memory No.
  • Page 101 SAVE/RECALL Press Enter again when asked to confirm the selected operation. After saving the settings, press ESC to return to the current function mode. After recalling settings, the unit will automatically go to the recalled setting function. Pressing ESC before pressing Enter will exit the Note Save/Recall/Clear operation.

  • Page 102: Command Overview

    GOM-804 & GOM-805 User Manual OMMAND OVERVIEW The Command overview chapter lists all the programming commands in alphabetical order. The command syntax section shows you the basic syntax rules you have to apply when using commands. Command Syntax Partial compatibility Compatible IEEE488.2...
  • Page 103 COMMAND OVERVIEW A query is a simple or compound Query command followed by a question mark (?). A parameter (data) is returned. SENSe:RANGe? Example Commands and queries have two different forms, long Command Forms and short. The command syntax is written with the short form of the command in capitals and the remainder (long form) in lower case.
  • Page 104 GOM-804 & GOM-805 User Manual Any of NR1,2,3 1,1.5,4.5e-1 <NRf> ASCII text string TEST_NAME <string> Marks the end of a command line. The following Message messages are in accordance with IEEE488.2 standard. Terminator (EOL) The most common Remote LF, CR, CR+LF,...

  • Page 105: Command List

    COMMAND OVERVIEW Command List General Commands SENSe:FUNCtion ................108 SENSe:AUTo ..................108 SENSe:RANGe ..................109 SENSe:SPEed ..................109 SENSe:REL:STATe ................109 SENSe:REL:DATa ................. 110 SENSe:REALtime:STATe ............... 110 SENSe:DISPlay ..................111 TRIGger:SOURce ................. 111 READ ....................111 Compare Commands CALCulate:COMPare:LIMit:REFerence ..........112 CALCulate:COMPare:LIMit:MODE ............
  • Page 106 GOM-804 & GOM-805 User Manual Temperature Compensate Commands TEMPerature:COMPensate:CORRect ........... 122 TEMPerature:COMPensate:COEFficient ..........122 Temperature Conversion Commands TEMPerature:CONVersion:RESistance..........123 TEMPerature:CONVersion:TEMPerature ..........123 TEMPerature:CONVersion:CONStant ..........124 TEMPerature:CONVersion:DISPlay ............124 TEMPerature:CONVersion:MATH:DATa ..........124 Temperature Commands TEMPerature:STATe ................125 TEMPerature:DATa ................125 Scan Commands CALCulate:SCAN:CHANnel ..............
  • Page 107 COMMAND OVERVIEW TEMPerature:AMBient:DATa ..............135 SYSTem:LFRequency................135 SYSTem:PWM:ON ................136 SYSTem:PWM:OFF ................136 System Commands *IDN ....................137 SYSTem:SERial ..................137 SYSTem:BRIGhtness ................137 USERdefine<X>:ACTive ............... 137 USERdefine<X>:FIRStdata ..............138 USERdefine<X>:LOGic ................ 138 USERdefine<X>:SEConddata ............... 139 SYSTem:HANDler ................139 SYSTem:KEYClick:BEEPer ..............139 SYSTem:ERRor..................

  • Page 108: General Commands

    GOM-804 & GOM-805 User Manual General Commands SENSe:FUNCtion Query Sets or returns the function mode. Description Syntax SENSe:FUNCtion {OHM|COMP|BIN|TC|TCONV|SCAN|DIODE} Query Syntax SENSe:FUNCtion? OHM MODE Parameter/ Return parameter COMP MODE COMP BIN MODE TC MODE TCONV MODE TCONV TEMP MODE* OHM+T*...

  • Page 109: Sense:range

    COMMAND OVERVIEW SENSe:RANGe Query Sets or returns the range of the present function. Description Syntax SENSe:RANGe <NRf> Query Syntax SENSe:RANGe? 5E-2 ~ 5E+6 Parameter <NRf> 5E-2 ~ 5E+6 Return parameter <NR3> Example SENS:RANG 0.05 Sets range to 50mΩ. SENS:RANG? >5.0000E-2 Returns the range as 50mΩ.

  • Page 110: Sense:rel:data

    GOM-804 & GOM-805 User Manual Example SENS:REL:STAT OFF Sets the relative function off. Note The SENS:REL:STAT can only be turned ON when measured vale is displayed. SENSe:REL:DATa Query Sets or returns the relative value for the relative function. Description Syntax SENSe:REL:DATa <NRf>...

  • Page 111: Sense:display

    COMMAND OVERVIEW SENSe:DISPlay Query Sets or returns the display mode. There are two display Description modes, normal and simple. Syntax SENSe:DISPlay <NR1> | {OFF|ON} Query Syntax SENSe:DISPlay? 0:OFF. Parameter/ <NR1> 1:ON. Return parameter Display mode is normal. Display mode is simple. Example SENS:DISP OFF Sets the display mode to normal.

  • Page 112: Compare Commands

    GOM-804 & GOM-805 User Manual Compare Commands CALCulate:COMPare:LIMit:REFerence Query Sets or returns the limit reference value for the compare Description function. Syntax CALCulate:COMPare:LIMit:REFerence {<NRf>[,<String>]} Query Syntax CALCulate:COMPare:LIMit:REFerence? 000.0001~999.9999 parameter <NRf> mohm/ohm/kohm/maohm,unit <String> If unit is not set, the unit will be automatically set by the present range.

  • Page 113: Calculate:compare:limit:lower

    COMMAND OVERVIEW Example CALC:COMP:LIM:MODE ABS Sets test results as absolute values for the compare function. CALCulate:COMPare:LIMit:LOWer Query Sets or returns the lower limit value for the compare Description function. Syntax CALCulate:COMPare:LIMit:LOWer {<NRf>[,<String>]} Query Syntax CALCulate:COMPare:LIMit:LOWer? 000.0000~999.9999 Parameter <NRf> mohm/ohm/kohm/maohm,unit <String> If the unit is not set, the unit will be automatically set by the present range.

  • Page 114: Calculate:compare:percent:lower

    GOM-804 & GOM-805 User Manual Example CALC:COMP:LIM:UPP 0.123,maohm Sets the upper limit value to 0.123MΩ. CALC:COMP:LIM:UPP? >0.1230E+6 Returns the upper limit as 0.123MΩ. Note This command is only applicable when compare mode is set to ABS for compare function. CALCulate:COMPare:PERCent:LOWer...

  • Page 115: Calculate:compare:beeper

    COMMAND OVERVIEW Example CALC:COMP:PERC:UPP 90.00 Sets the upper limit percent value to +90.00%. CALC:COMP:PERC:UPP? >90.00 Returns the upper limit as +90.00%. Note This command is only applicable when compare mode is set to DPER or PER for compare function. CALCulate:COMPare:BEEPer Query Sets or returns the compare function beeper mode.
  • Page 116 GOM-804 & GOM-805 User Manual 0: LO Return parameter <NR1> 1: IN 2: HI Example CALC:COMP:LIM:RES? >2 Indicates that the test result is HI.

  • Page 117: Binning Commands

    COMMAND OVERVIEW Binning Commands Binning commands are only applicable to GOM-805. BINNing:COUNt:CLEar Query Clear all bin sorting function test result counts. Description Syntax BINNing:COUNt:CLEar Parameter/ <None> BINNing:COUNt:TOTal Query Returns the total number (count total) of test bin results. Description Query Syntax BINNing:COUNt:TOTal? 0~999999999 Return parameter...

  • Page 118: Binning:Limit:lower

    GOM-804 & GOM-805 User Manual Query Syntax BINNing<X>:COUNt:RESult? Parameter <X> 0~99999999 Return parameter <NR1> Example BINN1:COUN:RES? >100 Indicates that bin1 has a pass count of 100. BINNing<X>:LIMit:LOWer Query Sets or returns the lower limit value (absolute value) for Description the selected bin.

  • Page 119: Binning:Percent:lower

    COMMAND OVERVIEW mohm/ohm/kohm/maohm,unit <String> If the unit is not set, the unit will be automatically set by the present range. 000.0000~999.9999E± X Return parameter <NR3> Example BINN1:LIM:UPP 0.95,maohm Sets bin1 upper limit value to 0.95MΩ. BINN1:LIM:UPP? >0.9500E+6 Returns the upper limt as 0.95MΩ. BINNing<X>:PERCent:LOWer Query Sets or returns the lower value percentage value for the...

  • Page 120: Binning:limit:beeper

    GOM-804 & GOM-805 User Manual Example BINN1:PERC:UPP 150.95 Sets the bin1 upper limit percent value to +150.95%. BINN1:PERC:UPP? >150.95 Returns the upper limit percentage value as +150.95%. BINNing:LIMit:BEEPer Query Sets or returns beeper mode for the bin sorting function. Description...

  • Page 121: Binning:limit:reference

    COMMAND OVERVIEW The test results are judged from Parameter/ absolute values. Return parameter The test results are judged from a DPER reference value ± a percentage offset. (delta percent) Example BINN:LIM:MODE DPER Sets the mode to Δ%. BINNing:LIMit:REFerence Query Sets or returns the limit reference value for the bin Description sorting function.

  • Page 122: Temperature Compensate Commands

    GOM-804 & GOM-805 User Manual Temperature Compensate Commands TEMPerature:COMPensate:CORRect Query Sets or returns the reference temperature for the Description temperature compensation function. Syntax TEMPerature:COMPensate:CORRect <NRf> Query Syntax TEMPerature:COMPensate:CORRect? -50.0~399.9 (Unit: ºC) Parameter <NRf> -50.0~399.9 (Unit: ºC) Return parameter <NR2> Example TEMP:COMP:CORR 25.5...

  • Page 123: Temperature Conversion Commands

    COMMAND OVERVIEW Temperature Conversion Commands TEMPerature:CONVersion:RESistance Query Sets or returns the initial resistance for the temperature Description conversion function. Syntax TEMPerature:CONVersion:RESistance {<NRf>[,<String>]} Query Syntax TEMPerature:CONVersion:RESistance? 000.0001~999.9999 Parameter <NRf> mohm/ohm/kohm/maohm,unit <String> If the unit is not set, the unit will be automatically set by the present range.

  • Page 124: Temperature:conversion:constant

    GOM-804 & GOM-805 User Manual TEMPerature:CONVersion:CONStant Query Sets or returns the temperature constant for the Description temperature conversion function. Syntax TEMPerature:CONVersion:CONStant <NRf> Query Syntax TEMPerature:CONVersion:CONStant? 0.0~999.9 Parameter <NRf> 0.0~999.9 Return parameter <NR2> Example TEMP:CONV:CONS 235 Sets the temperature constant to 235.

  • Page 125: Temperature Commands

    COMMAND OVERVIEW Temperature Commands TEMPerature:STATe Query Description Sets or returns the temperature function state. Syntax TEMPerature:STATe {<NR1>|OFF|ON} Query Syntax TEMPerature:STATe? Parameter/ <NR1> 0:OFF Return parameter 1:ON Turn the temp function off. Turn the temp function on. Example TEMP:STAT ON Sets the TEMP (Ohm+T) function on. TEMPerature:DATa Query Returns the PT-100 sensor temperature measurement in...

  • Page 126: Scan Commands

    GOM-804 & GOM-805 User Manual Scan Commands CALCulate:SCAN:CHANnel Query Sets or returns the channel for the scan function. Description Syntax CALCulate:SCAN:CHANnel <NR1> Query Syntax CALCulate:SCAN:CHANnel? 1~100 Parameter/ <NR1> Return parameter Example CALC:SCAN:CHAN 5 Sets the channel to 5. CALCulate:SCAN:DELay Query Sets or returns the interval delay for the scan function.

  • Page 127: Calculate:scan:limit:mode

    COMMAND OVERVIEW Example CALC:SCAN:LIM:REF 10.00,mohm Sets the reference limit to 10.00mΩ. CALC:SCAN:LIM:REF? >10.0000E-3 Returns the reference limit as 10.00mΩ. CALCulate:SCAN:LIMit:MODE Query Sets or returns the scan function compare mode. Description Syntax CALCulate:SCAN:LIMit:MODE {ABS|DPER} Query Syntax CALCulate:SCAN:LIMit:MODE? The test results are judged from Parameter/ absolute values.

  • Page 128: Calculate:scan:limit:upper

    GOM-804 & GOM-805 User Manual CALCulate:SCAN:LIMit:UPPer Query Sets or returns upper limit of the scan function. Description Syntax CALCulate:SCAN:LIMit:UPPer {<NRf>[,<String>]} Query Syntax CALCulate:SCAN:LIMit:UPPer? 000.0000~999.9999 Parameter <NRf> mohm/ohm/kohm/maohm,unit <String> If unit is not set, the unit will be automatically set by the present range.

  • Page 129: Measure

    COMMAND OVERVIEW Syntax CALCulate:SCAN:PERCent:UPPer <NRf> Query Syntax CALCulate:SCAN:PERCent:UPPer? 000.00~999.99 Parameter <NRf> 000.00~999.99 Return parameter <NR2> Example CALC:SCAN:PERC:UPP 90.00 Sets the upper limit percent value to +90.00%. CALC:SCAN:PERC:UPP? >90.00 Returns the upper limit as +90.00%. MEASure<X> Query Returns the results of the selected channel in the scan Description mode, including HI/LO/IN and value.
  • Page 130 GOM-804 & GOM-805 User Manual Example SHOW? Returns 1111111111______________________________________ ________________________________________________ _____.

  • Page 131: Source Commands

    COMMAND OVERVIEW Source Commands Source commands are only applicable to GOM-805. SOURce:DRY Query Sets or returns the dry circuit test mode. Only applicable Description to the GOM-805. Syntax SOURce:DRY {<NR1> | {OFF|ON} Query Syntax SOURce:DRY? 0:OFF. Parameter/ <NR1> 1:ON. Return parameter Turn dry circuit test mode off.

  • Page 132: Meas. Setup Commands

    GOM-804 & GOM-805 User Manual Meas. Setup Commands SYSTem:AVERage:STATe Query Sets or returns the average function state. Description Syntax SYSTem:AVERage:STATe <NR1> | {OFF|ON} Query Syntax SYSTem:AVERage:STATe? 0:OFF. Parameter/ <NR1> 1:ON. Return parameter Turn the average function off. Turn the average function on.

  • Page 133: System:mdelay:data

    COMMAND OVERVIEW Turn the measurement delay off. Turn the measurement delay on. Example SYST:MDEL:STAT OFF Turns the measurement delay function off. SYSTem:MDELay:DATa Query Sets or returns the measurement delay time. Description Syntax SYSTem:MDELay:DATa <NRf> Query Syntax SYSTem:MDELay:DATa? 0.000~100.000 Parameter/ <NRf> Unit:ms Return parameter For values under 1s, the unit resolution...

  • Page 134: Trigger:edge

    GOM-804 & GOM-805 User Manual Syntax TRIGger:DELay:DATa <NR1> Query Syntax TRIGger:DELay:DATa? 0~1000 Parameter/ <NR1> Unit:ms Return parameter Example TRIG:DEL:DAT 100 Sets the trigger delay time to 100ms. TRIGger:EDGE Query Sets or returns the trigger edge (falling or rising edge). Description...

  • Page 135: Temperature:ambient:data

    COMMAND OVERVIEW 0:OFF. Parameter/ <NR1> 1:ON. Return parameter Disables the user-set ambient temperature. Enables the user-set ambient temperature. Example TEMP:AMB:STAT OFF Disables the user-set ambient temperature. TEMPerature:AMBient:DATa Query Sets or returns the user-set ambient temperature value for Description the temperature compensation and the temperature conversion function.

  • Page 136: System:pwm:on

    GOM-804 & GOM-805 User Manual Example SYST:LFR 60 Sets the line frequency to 60Hz. SYST:LFR? >60Hz Returns the line frequency as 60Hz. SYSTem:PWM:ON Query Sets or returns the duty ON period for the PWM drive Description mode. PWM drive mode is only available for the GOM-805.

  • Page 137: System Commands

    COMMAND OVERVIEW System Commands *IDN Query Returns the manufacturer, model No., serial number and Description system version number. Query Syntax *IDN? Return parameter <String> 31 characters Example *IDN? >GWINSTEK,GOM805,GXXXXXXXX,V1.00. SYSTem:SERial Query Returns the serial number. Description Query Syntax SYSTem:SERial? 9 characters Return parameter <String>...

  • Page 138: Userdefine:Firstdata

    GOM-804 & GOM-805 User Manual Syntax USERdefine<X>:ACTive <NR1> Query Syntax USERdefine<X>:ACTive? Userdefine pin 1~2 Parameter/ <X> Return parameter 1:active low state <NR1> 2:active high state Example USER1:ACT 1 Sets the userdefine1 pin IO to active low state. USERdefine<X>:FIRStdata Query Sets or returns the first operand for the selected user Description define pin.

  • Page 139: Userdefine:Seconddata

    COMMAND OVERVIEW USERdefine<X>:SEConddata Query Sets or returns the second operand for the selected user Description define pin. Syntax USERdefine<X>:SECondata <NR1> Query Syntax USERdefine<X>:SECondata? Parameter/ <X> Return parameter 1~8:bin1~bin8 state <NR1> 9:bin out state 10:hi state 11:low state 12:pass state 13:fail state Example USER1:SEC 3 Sets the last operand of userdefine1 as the state of the...

  • Page 140: System:error

    GOM-804 & GOM-805 User Manual 0:OFF. Parameter/ <NR1> 1:ON. Return parameter Turn the keyclick beeper off. Turn the keyclick beeper on. Example SYST:KEYC:BEEP OFF Sets the keyclick beeper off. SYSTem:ERRor Query Returns the current system error, if any. Description Query Syntax SYSTem:ERRor? Error number,”Error message”...

  • Page 141: Memory Commands

    COMMAND OVERVIEW Memory Commands MEMory:SAVe Query Saves the settings to the selected memory slot. Description Syntax MEMory:SAVe <NR1> 1~20 Parameter <NR1> Example MEM:SAV 1 Saves the settings to memory slot 1. MEMory:RECall Query Recalls the settings from the selected memory slot. Description Syntax MEMory:RECall <NR1>...
  • Page 142 GOM-804 & GOM-805 User Manual Example MEM:STAT? > NFFNN-NNNNN-NNNNN-NNNNN Indicates that memory slots 2 and 3 have data and that all other memory slots are empty.

  • Page 143: Status Commands

    COMMAND OVERVIEW Status Commands STATus:PRESet Query Sets the QUESTionable enable register to zero. Description Syntax STATus:PRESet <NONE> Parameter <None> STATus:QUEStionable:ENABle Query Sets or returns the Questionable Data Enable register. Description Syntax STATus:QUEStionable:ENABle <NR1> Query Syntax STATus:QUEStionable:ENABle? 0~32767. Parameter/ <NR1> Return parameter Example STAT:QUES:ENAB 2560 Sets the Questionable Data Enable register to...

  • Page 144: Ieee 488.2 Common Commands

    GOM-804 & GOM-805 User Manual IEEE 488.2 Common Commands *CLS Query Clears the Event Status register (Output Queue, Description Operation Event Status, Questionable Event Status, Standard Event Status). Syntax *CLS Parameter <None> *ESE Query Sets or returns the ESER (Event Status Enable Register) Description contents.

  • Page 145: Opc

    COMMAND OVERVIEW *OPC Query Sets or returns the operation complete bit (bit0) in SERS Description (Standard Event Status Register) when all pending operations are completed. Syntax *OPC Query Syntax *OPC? Parameter <None> Return parameter <NR1> 0:operation not complete 1:operation complete Example *OPC? Returns 1.

  • Page 146: Stb

    GOM-804 & GOM-805 User Manual *STB Query Returns the SBR (Status Byte Register) contents. Description Query Syntax *STB? Return parameter <NR1> 0~255 Example *STB? >81 SESR=01010001 *TRG Query Manually triggers the instrument. Description Syntax *TRG Parameter <None>...

  • Page 147: Status System

    COMMAND OVERVIEW Status system The diagram below is a description of the status system. Questionable Data Status Register Event Enable Voltage Overload Not Used Not Used Not Used Output Not Used Buffer Temp Overload Not Used Not Used Not Used Ohms Overload Not Used Limit Test Fail LO...

  • Page 148: Faq

    GOM-804 & GOM-805 User Manual ● What are the different measurement speeds? ● The GOM-804/805 performance does not match the specifications. What are the different measurement speeds? There are two measurement speeds for both resistance and temperature measurement. At the slow measurement rate, the measurement speed is 10 samples/s and at the fast measurement rate the measurement speed is at 60 samples/s.

  • Page 149: Appendix

    APPENDIX PPENDIX Function Function Selection Combinations ......150 Combinations Temperature Reference Temperature Table ....... 151 Measurement RTD Sensors ............152 Optional Platinum Sensor ........152 Specifications Resistance Measurement ........154 Dry Resistance Measurement ....... 155 Temperature Measurement ........155 Temperature Correction Function ......155 Interface ...............

  • Page 150: Function Selection Combinations

    GOM-804 & GOM-805 User Manual Function Selection Combinations Function Combination Table The following table shows which functions can be used Overview with the Relative, Drive and Dry Circuit functions. Function Dry( Drive( ✔ ✔ ✔ Comp ✔ ✔ ✔ ✔...

  • Page 151: Temperature Measurement

    APPENDIX Temperature Measurement Reference Temperature Table The International Temperature Scale (ITS) is based on the Overview following table. The table has 17fixed calibration points as Background of 1990. Temperature ˚K ˚C Element Type Hydrogen Triple point 13.8033 -259.3467 (Ne) Neon Triple point 24.5561 -248.5939...

  • Page 152: Measurement Rtd Sensors

    GOM-804 & GOM-805 User Manual RTD Sensors Resistive Thermal Devices (RTDs) are commonly used as Overview temperature sensors. RTDs change resistance linearly over a specific range of temperature. The table below shows some of the inherent features of RTDs compared to thermocouples.
  • Page 153 APPENDIX The Alpha (A), Beta (B), Delta (D) values for the PT-100 sensor are listed below: Ω @ 0˚C Type Standard Alpha Beta Delta PT-100 ITS90 0.003850 0.10863 1.49990 100Ω Example—Calculating the resistance of a PT-100 Temperature Calculation Example RTD at 100˚C (T). The following R Ω...

  • Page 154: Specifications

    GOM-804 & GOM-805 User Manual Specifications The specifications are applicable under the following Conditions conditions: Background  A 1-year calibration cycle.  An operating temperature of 18 to 28 ˚C (64.4 to 82.4˚F).  Relative humidity not exceeding 80%.  Accuracy is expressed as ± (percentage of reading + percentage of range).

  • Page 155: Dry Resistance Measurement

    APPENDIX * When Kelvin clips are used to resume testing after a long period of time, please wait for a short time to stabilize the measurement. *Fast and Slow measurement rates have the same specifications. However, the Slow rate is more accurate as it will correct for any errors associated with temperature drift that occurs from the difference between the measurement temperature and the calibration temperature.
  • Page 156 GOM-804 & GOM-805 User Manual *The temperature coefficient for the other settings must be calculated individually according to different conditions. *If the temperature coefficient or the difference between the environmental temperature and the required temperature exceeds normal operation, after calculating the compensation, the variation to the reading value will be significant.

  • Page 157: Interface

    Signal: LOW, HIGH, FAIL, PASS, EOT, READY, BIN 1~8, BIN OUT: total 15 TTL outputs. Scan* Signal: RELAY, PASS, LOW, HIGH, CLOCK, STRB total 6 TTL outputs. GOM-804: USB/RS-232 Communication GOM-804G: USB/RS-232/GPIB Interfaces GOM-805: USB/RS-232/GPIB *The Scan and Handler interface use the same connector.

  • Page 158: Dimensions

    GOM-804 & GOM-805 User Manual Dimensions G O M -8 0 5 DC Milliohm Meter Compare Binning TCONV TEMP Enter Speed Scan Trigger GUARD Display Local Diode Drive Range POWER SOURCE SENSE SENSE SOURCE 275.5 214.0 282.9 222.8...

  • Page 159: Declaration Of Conformity

    No. 69, Lu San Road, Suzhou New District, Jiangsu, China declare, that the below mentioned product Type of Product: DC Milliohm Meter Model Number: GOM-804, GOM-805 are herewith confirmed to comply with the requirements set out in the Council Directive on the Approximation of the Law of Member States relating to Electromagnetic Compatibility (2004/108/EC) &...

  • Page 160: Index

    GOM-804 & GOM-805 User Manual NDEX Binning function ambient temperature ........66 average ............. 60 setting ............... 46 line frequency ..........67 Characteristics ..........10 measure delay ..........61 Compare function PWM duty ............68 setting ............... 41 setting ............... 60 Declaration of conformity ......
  • Page 161 Index System settings Temperature conversion beep ..............76 setting ............... 56 brightness ............72 Temperature measurement external IO ............73 reference ............151 handler mode ..........74 TFT-LCD overview .......... 19 interface ............71 Tilt stand ............23 power on settings ..........70 Trigger system information .........

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