GW Instek GOM-802 User Manual
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GW Instek GOM-802 User Manual

D.c. milli-ohm meter
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D.C. Milli-Ohm Meter
GOM-802
USER MANUAL
GW INSTEK PART NO. 82OM-80200MF1
ISO-9001 CERTIFIED MANUFACTURER

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Summary of Contents for GW Instek GOM-802

  • Page 1 D.C. Milli-Ohm Meter GOM-802 USER MANUAL GW INSTEK PART NO. 82OM-80200MF1 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

    SAFETY INSTRUCTIONS ............ 4   Safety Symbols ............ 4   Safety Guidelines ..........5   GETTING STARTED ............8   GOM-802 Characteristics ........9   Key Features ............11   Front Panel Overview ........12   Rear Panel Overview ......... 16  ...

  • Page 4: Safety Instructions

    GOM-802 in the best possible condition. Safety Symbols These safety symbols may appear in this manual or on the GOM-802. Warning: Identifies conditions or practices that could result in injury or loss of life.

  • Page 5: Safety Guidelines

    SAFETY INSTRUCTIONS Safety Guidelines Do not place any heavy objects on the GOM-802. General Guideline  Avoid severe impact or rough handling that leads to  damaging the GOM-802. CAUTION Do not discharge static electricity to the GOM-802.  Use only mating connectors, not bare wires, for the ...
  • Page 6 Temperature: 0°C to 40°C (operation)  (Note) EN 61010-1:2001 specifies the pollution degrees and their requirements as follows. The GOM-802 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 7 SAFETY INSTRUCTIONS Power cord for the United Kingdom When using the GOM-802 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 WARNING: THIS APPLIANCE MUST BE EARTHED...
  • Page 8 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. Characteristics GOM-802 Characteristics .........

  • Page 9: Getting Started

    The ability to choose between high measurement accuracy with 7 samples/sec (full scale at 30000) or high speed measurements with 30 samples/sec (full scale at 3000) allows the GOM-802 the flexibility to fulfill a number of different measurement roles.
  • Page 10 DUT at a certain temperature. When the temperature coefficient and the required temperature (of the resistance measurement) is keyed in under TC mode, the GOM-802 will display the extrapolated measurement. For automatic testing The GOM-802 has a handler Automatic interface designed for automatic testing.

  • Page 11: Key Features

    GETTING STARTED Key Features  30,000 counts.  Measurement Range: 30mΩ~3MΩ.  0.05% accuracy.  Hi/Lo comparator and limit percentage setting with 20 memory sets.  REL, Actual and % value measurements.  Manual or Auto-ranging.  Continuous or Triggered measurement modes. ...

  • Page 12: Front Panel Overview

    GOM-802 User Manual Front Panel Overview Turns On or Off the main Power Switch power. For details about the power up sequence, see page 18. Primary Value Display Shows the primary measurement results. Normal Display Shows the Normal (nominal) value setting.
  • Page 13 GETTING STARTED Function Control Indicators Indicates when a function key is active. Sense HI and Sense LO terminals. Measurement Terminals Current Source Terminals, Source HI Current Source and Source LO. Terminals Negative Terminal. This terminal has Negative the same potential as earth, but cannot Terminal be substituted for it.
  • Page 14 GOM-802 User Manual  Sample speed VALUE The REL% key is used to perform a zero adjustment to the test leads or a DUT. Using the shift key will display the measured values as a percentage of the normal value.
  • Page 15 Displays the lower limit as as a Lower Limit percentage. Display (LO) Displays the upper limit as a percentage. Upper Limit Display (HI) The interface indicator shows the status Interface mode of the GOM-802. Remote mode Indicator (RMT), Handler mode (HAND) or Scan mode.

  • Page 16: Rear Panel Overview

    GOM-802 User Manual Rear Panel Overview Accepts the power cord. AC 100/120V AC Input or 220/230V; 50/60Hz. For the power on sequence, see page Holds the main fuse: Fuse Socket 100/120V: T0.3A 250V; 220/230V: T0.25A 250V; For the fuse replacement details, see page 47.

  • Page 17: Set Up

    GETTING STARTED Set Up Tilt Stand 1. Pull handle base away from the casing. Steps 2. Turn handle into any of the preset positions. Stand Position Carry Position...

  • Page 18: Power Up

    GOM-802 User Manual Power Up 1. Ensure that the correct voltage is lined up with the arrow on the fuse cover on the rear panel. 100V 120V 220V 230V 2. Connect the power cord to the AC Voltage input. Steps...

  • Page 19: Wire Kelvin Connection

    GETTING STARTED Example: Resistance measurement mode 4 Wire Kelvin Connection The GOM-802 uses 4 wire Kelvin connections for Background accurate measurements. Diagram Description Source HI The Source HI carries the measuring current source. It is connected to the + side of the DUT.

  • Page 20: Zeroing (Relative Function)

    GOM-802 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 – relative preset value.

  • Page 21: Measurement

    MEASUREMENT EASUREMENT Overview Measurement Overview .......... 22 Resistance Resistance Measurement ........23 Select the Resistance Range ........24 Rate Select Measurement Rate ........25 Trigger Using the Trigger Function ........25 Compare Compare Function ..........26 Save Compare Settings .......... 28 Recall Compare Settings ........

  • Page 22: Measurement Overview

    GOM-802 User Manual Measurement Overview The Measurement chapter refers to the measurements Background listed below. For measurements using the Handler or Scan interfaces, see page 36. Comparison function TEMP Measurement type COMP Temperature sensor TEMP SHIFT+ COMP function Auto-range Manual...

  • Page 23: Resistance Measurement

    MEASUREMENT Resistance Measurement 1. Select the Resistance function. TEMP Press SHIFT + COMP access the main function mode. Press the Up and Down arrow keys to select resistance measurement mode (shown above). There are three different modes: (resistance), (temperature) (temperature compensation) mode.

  • Page 24: Select The Resistance Range

    GOM-802 User Manual Select the Resistance Range The resistance range can be used with normal resistance Background measurement as well as the temperature compensation function. Press the Up and Down arrow keys Auto Range to manually select the resistance range.

  • Page 25: Rate Select Measurement Rate

    For detailed specifications, please see the specifications on page 49. Note Using the Trigger Function The GOM-802 can use internal or manual triggering for Background the resistance, temperature and temperature compensation measurement modes. External triggering is only supported with the Handler and Scan modes.

  • Page 26: Compare Function

    GOM-802 User Manual The EXT indicator will be lit when the manual trigger is active. Press the MANUAL TRIG 2. Manually each time you want to start a single Triggering Measurements measurement. The EXT indicator will be lit when the manual trigger is active.
  • Page 27 MEASUREMENT The GO, HI or LO indicators will light up for each measured value that is compared to the upper and lower limits. 1. Select the compare function TEMP Press COMP to access the compare mode, as shown above. 2. Normal value setting SCAN Press NORMAL...

  • Page 28: Save Compare Settings

    GOM-802 User Manual Use the Up and Down arrow keys to edit the value of the selected digit. Range 000~999 Press ENTER to confirm the setting. 4. LO limit setting Press LOW to set the LO percentage limit. Use the Left and Right arrow keys to select a digit.

  • Page 29: Recall Compare Settings

    20 memory locations. If these values are not saved, the settings will be lost after exiting Compare mode. Up to 20 Normal, High, Low settings can be saved on the GOM-802. 1. Select Recall mode RECALL...

  • Page 30: Buzzer Buzzer Function

    GOM-802 User Manual 2. Select memory location Use the Left and Right arrow keys to select a digit. The selected digit will flash. Use the Up and Down arrow keys to edit the value of the selected digit. Range 00~19 Press ENTER to confirm the setting.

  • Page 31: Percentage Display As Percentage

    MEASUREMENT Pressing SHIFT before pressing ENTER will exit the Buzzer function settings. Note Display as Percentage In the compare function, the measured value can be Background displayed as a percentage of the Normal value rather than the actual value. For example, if the Normal value is 20.000, and the actual value is 10.000, then as a percentage it would be displayed as 50.00%.

  • Page 32: Temperature Measurement

    GOM-802 User Manual Relative Function The Relative function is used to perform a zero Background adjustment on the test leads or the resistance of the DUT. After the Reference value is pre-set, each measurement that is displayed is equal to the actual value – relative preset value.

  • Page 33: Relative Function

    MEASUREMENT Press the Up and Down arrow keys to select the ˚C measurement mode (shown above). There are three different modes: (resistance), (temperature) (temperature compensation) mode. Press ENTER to confirm 2. Temperature mode display appears. The temperature is displayed on the NORMAL display. The temperature sensor uses the rear panel TC port for 3.

  • Page 34: Temperature Compensation

    GOM-802 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 35: Compensation Select The Resistance Range

    MEASUREMENT Sensor Connection: 3. Temperature compensation connection. DUT connection 4 Wire: Select the Resistance Range Background The resistance range can be selected when using the temperature compensation function. Press the Up and Down arrow keys Auto Range to manually select the resistance range Press the AUTO/MAN key to use Manual...

  • Page 36: Handler/Scan/ Interface

    GOM-802 User Manual ANDLER/SCAN/ INTERFACE Handler Handler Overview ..........37 Scan Scan Overview ............38 Scan Setup ............. 38 Scan Output ............41 Interface Configure Interface ..........42 Configure GPIB Interface ........42 Configure RS-232 Interface ........43 Interface Function Check ........44...

  • Page 37: Handler Overview

    HANDLER/SCAN/ INTERFACE Handler Overview The Handler Interface is used to help bin components Background based on the Go-NoGo comparator function test. There are 6 TTL outputs and one TTL input. The Handler interface can only be used with the resistance measurement and compare measurement modes.

  • Page 38: Scan Overview

    GOM-802 User Manual Scan Overview The Scan function is used to automatically bin groups of Background up to 100 components. The scan function, unlike the handler interface must first be activated using the panel keys. There are a total of 6 outputs as well as a GND and power (+5V) pin.
  • Page 39 HANDLER/SCAN/ INTERFACE 2. Select the resistance function. TEMP Press SHIFT + COMP access the main function mode. Press the Up and Down arrow keys to select the resistance measurement mode (shown above). There are three different modes: (resistance), (temperature) (temperature compensation) mode.
  • Page 40 GOM-802 User Manual Count units 30~30,000 Press ENTER to confirm. 7. The Ready Display appears After the Ready indicator is shown it is not Note possible to make any changes to the compare function or range. 8. Start the scan.

  • Page 41: Scan Output

    HANDLER/SCAN/ INTERFACE Scan Output The timing diagrams for the scan output under different Background conditions are shown below. Ready message displayed… After the MANUAL TRIG key is pressed… Relay Pass High Clock STRB Scan channel 1. Delay time has Scan channel n, delay time has elapsed. elapsed.

  • Page 42: Configure Interface

    GOM-802 User Manual Configure Interface The RS-232 and GPIB interfaces are factory installed Overview options for remote control of the GOM-802. The remote control interfaces allow the GOM-802 to be programmed for automatic testing. For more information on the remote control programming, please see the GOM-802 programming manual.

  • Page 43: Configure Rs-232 Interface

     No loop or parallel connection  Configure RS-232 Interface The GOM-802 uses an RS-232C connection for remote Background control. When connecting to a PC ensure the correct baud rate, parity, data bits, stop bit and data control settings are used.

  • Page 44: Interface Function Check

    Operation *idn? This should return the Manufacturer, Model number, and Firmware version. GW. Inc, GOM-802 , FW1.00 If you do not receive a proper response from the Meter, Function Check please check if the power is on, the GPIB address/RS232 Errors baud rate is correct, and all cable connections are active.

  • Page 45: Faq

    ● What are the different measurement speeds? ● The GOM-802 performance does not match the specifications. What are the different measurement speeds? There are two measurement speeds for both resistance and temperature measurement. At 30,000 counts the measurement speed is 7 readings/s, at 3,000 counts the measurement speed is 30 readings/s.

  • Page 46: Appendix

    GOM-802 User Manual PPENDIX Fuse Replace the AC source fuse ........47 Replacement Temperature Reference Temperature Table ......... 48 Measurement RTD SensorsTemperature ........49 Optional Platinum Sensor........49 Specifications Resistance Measurement ........51 Temperature Measurement ........52 Temperature Correction Function ......52 Interface..............

  • Page 47: Fuse Replacement

    APPENDIX Fuse Replacement Replace the AC source fuse 1. Remove the power cord. Steps 2 2 0 2. Remove the fuse socket using a flat screwdriver. 2 2 0 3. Replace the fuse in the holder. 2 2 0...

  • Page 48: Temperature Measurement

    GOM-802 User Manual 4. Ensure the correct line voltage is lined up with the arrow on the fuse holder. Insert the fuse socket. 2 2 0 2 2 0 100V/120V TT0.3A 250V Rating 220V/230V T0.25A 250V Temperature Measurement Reference Temperature Table...

  • Page 49: Measurement Rtd Sensorstemperature

    APPENDIX 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. Feature Description Accuracy Higher accuracy Resolution...
  • Page 50 GOM-802 User Manual 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 at 0˚C), Ω...

  • Page 51: Specifications

    APPENDIX 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 + digits).

  • Page 52: Temperature Measurement

    GOM-802 User Manual Measurement Four-terminal method. Auto-ranging Provided. Over input range “OL” indication Maximum Applied 30m~3Ω range: 30VpDC voltage Other range: 100VpDC Comparator 20 sets of comparator status can be selected. Buzzer mode NON, PASS, FAIL switchable Temperature Measurement Temperature sensor Platinum resistor.

  • Page 53: Interface

    APPENDIX Interface Handler interface* Signal: START TTL input Signal: LOW, HIGH, FAIL, PASS, EOT, READY total 6 TTL outputs. (This function is valid only under the resistance measurement mode and the compare mode is enabled.) Scan* Signal: READY, PASS, LOW, HIGH, CLOCK, STRB total 6 TTL outputs.

  • Page 54: Declaration Of Conformity

    GOM-802 User Manual Declaration of Conformity GOOD WILL INSTRUMENT CO., LTD. declare, that the below mentioned product Type of Product: DC Milliohm Meter Model Number: GOM-802 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 (2014/30/EU) and Low Voltage Directive (2014/35/EU).

  • Page 55: Index

    Index NDEX Buzzer PT-100 sensor temperature calculation ..49 setting ............... 30 Rate Characteristics ............ 9 setting ............... 25 Compare function Rear panel overview ........16 setting ............... 26 Reference temperature table ..... 48, 50 Declaration of conformity ....... 54 Relative function Disposal instructions .........

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