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GOM-802

User

Manual

44

PC – GOM
RS-232C
Connection

The RS232 connection uses a Null-modem connection,
in which transmit (TxD) and receive (RxD) lines are
cross-linked.

Interface Function Check

Operation

Run this query from the terminal.
*idn?
This should return the Manufacturer, Model number, and
Firmware version.
GW. Inc, GOM-802 , FW1.00

Function Check
Errors

If you do not receive a proper response from the Meter,
please check if the power is on, the GPIB address/RS232
baud rate is correct, and all cable connections are active.

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Summary of Contents for 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: ... 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 Good Will Instrument Co Ltd No 7 1 Jhongsing Rd Tucheng Dist New Taipei City 236 Taiwan ...

Page 3: ... Rear Panel Overview 16 Set Up 17 MEASUREMENT 21 Measurement Overview 22 Resistance Measurement 23 Compare Function 26 Temperature Measurement 32 Temperature Compensation 34 HANDLER SCAN INTERFACE 36 Handler Overview 37 Scan Overview 38 Configure Interface 42 FAQ 45 APPENDIX 46 Fuse Replacement 47 Temperature Measurement 48 Specifications 51 Declaration of Conformity 54 INDEX 55 ...

Page 4: ...ay appear in this manual or on the GOM 802 WARNING Warning Identifies conditions or practices that could result in injury or loss of life CAUTION Caution Identifies conditions or practices that could result in damage to the GOM 802 or to other properties DANGER High Voltage Attention Refer to the Manual Protective Conductor Terminal Earth ground Terminal Do not dispose electronic equipment as unso...

Page 5: ...ation Measurement category II is for measurement performed on the circuits directly connected to the low voltage installation Measurement category I is for measurements performed on circuits not directly connected to Mains Power Supply WARNING AC Input voltage 100V 120V 220V 230 V AC 50 60Hz 27VA 22W The power supply voltage should not fluctuate more than 10 Connect the protective grounding conduc...

Page 6: ...r surface resistivity Pollution degree 1 No pollution or only dry non conductive pollution occurs The pollution has no influence Pollution degree 2 Normally only non conductive pollution occurs Occasionally however a temporary conductivity caused by condensation must be expected Pollution degree 3 Conductive pollution occurs or dry non conductive pollution occurs which becomes conductive due to co...

Page 7: ...ected to the terminal which is marked with the letter N or coloured Blue or Black The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red If in doubt consult the instructions provided with the equipment or contact the supplier This cable appliance should be protected by a suitably rated and approved HBC mains fuse refer to the ratin...

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 9 Key Features 11 Panel Overview Front Panel Overview 12 Rear Panel Overview 16 Setup Tilt Stand 17 Power Up...

Page 9: ... the status of the pass fail testing The relative feature enables the GOM 802 to easily compensate for any stray resistance Up to 20 different sets of HI LO GO settings can be stored to satisfy a number of different testing conditions The GOM 802 is also able to recall the last test setting that was used every time it is turned on Performance The GOM 802 has nine selectable measurement ranges from...

Page 10: ... automatic testing The GOM 802 has a handler interface designed for automatic testing The handler interface outputs the status of PASS FAIL HI LO READY and EOT signals and inputs a trigger control signal An RS 232 and GPIB option is also available for computer control applications Applications Production testing for contact resistance of switches relays connectors cables and printed circuit boards...

Page 11: ...REL Actual and value measurements Manual or Auto ranging Continuous or Triggered measurement modes Temperature compensation and measurement Four wire measurement method Auto recall last setting on power up Diode test Alarm setting for PASS FAIL test result Sampling rate 7 or 30 sampling sec Standard interface Scan Handler optional interfaces RS 232 GPIB ...

Page 12: ... page 18 Primary Value Display Shows the primary measurement results Normal Display Shows the Normal nominal value setting Comparator Indicators The comparator indicators indicate the status of comparison judgments HI measurement exceeds the HI limit LO measurement exceeds the LO limit GO measurement is within the HI and LO limits ...

Page 13: ... Function Keys The COMPTEMP key activates the comparator function The secondary function turns on the temperature compensation function Temperature compensation The Cursor keys are used to edit parameters and navigate the menu tree The Up Down arrow keys are used to change the values and range of the different parameters The secondary function recalls previously saved settings Recall settings The ...

Page 14: ...the milliohm meter between local and remote mode The secondary function will set the I O interface to GPIB or RS 232 GPIB RS232 mode Sets the High limit values The secondary function activates the Handler function SHIFT HANDLER HIGH Handler mode Sets the normal Nominal value for the comparator function Scan function Sets the lower limit for the comparator function and turns the buzzer on for eithe...

Page 15: ...ernal Turns the internal trigger ON OFF Enter key The SHIFT key is used to access the secondary functions Lower Limit Display LO Displays the lower limit as as a percentage Upper Limit Display HI Displays the upper limit as a percentage Interface Indicator The interface indicator shows the status mode of the GOM 802 Remote mode RMT Handler mode HAND or Scan mode ...

Page 16: ...5A 250V For the fuse replacement details see page 47 RS 232C port Accepts an RS 232C cable for remote control DB 9 male connector For remote control details see page 43 GPIB port Accepts a GPIB cable for remote control page 42 Handler Scan port The Handler Scan port is used to output pass fail high low comparison results Temperature Sensor The temperature sensor input for the optional PT 100 tempe...

Page 17: ...GETTING STARTED 17 Set Up Tilt Stand Steps 1 Pull handle base away from the casing 2 Turn handle into any of the preset positions Stand Position Carry Position ...

Page 18: ... 230 100 220 120 230 100 220 120 230 Steps 2 Connect the power cord to the AC Voltage input 220 1 0 0 120 230 CAUTION Ensure the ground connector of the power cord is connected to a safety ground This will affect the measurement accuracy 3 Press the main power switch on the front panel POWER 4 The display will light up and show the last setting used before the last shut down ...

Page 19: ...I The Source HI carries the measuring current source It is connected to the side of the DUT Source LO The Source LO terminal accepts the signal return current Connects to the side of the DUT Sense HI Monitors the positive potential Sense LO Monitors the negative potential GND If the component has a large metallic area not connected to either terminal connect it to ground to reduce noise ...

Page 20: ...e relative value is a negative a minus sign is shown on the MSB most significant bit At low measurement speeds the minus sign will alternate with the displayed measurement 1 Short the cables Short the test cables together using a short thick copper wire if necessary 1 Set the Reference value Press the REL VALUE key 2 Relative mode display appears REL Indicates the Relative function is active Note ...

Page 21: ...r Using the Trigger Function 25 Compare Compare Function 26 Save Compare Settings 28 Recall Compare Settings 29 Buzzer Buzzer Function 30 Percentage Display as Percentage 31 Relative Relative Function 32 Temperature Temperature Measurement 32 Relative Function 33 Temperature Compensation Temperature Compensation 34 Select the Resistance Range 35 Relative Function 35 ...

Page 22: ... Temperature sensor function AUTO MANSPEED Auto range Manual range SHIFT AUTO MANSPEED Measurement speed function REL VALUE Relative function selector SHIFT REL VALUE Toggle Relative or Value HIGHHANDLER High comparison limit SHIFT HIGHHANDLER Handler function NORMALSCAN Normal nominal value SHIFT NORMALSCAN Scan mode LOW Low comparison limit SHIFT LOW Buzzer on off MANUAL TRIGINT Trigger settings...

Page 23: ...nce temperature and temperature compensation mode Press ENTER to confirm 2 Resistance mode display appears Auto Indicates automatic ranging mΩ Milliohms Ω Ohms kΩ Kilo ohms 3 Connect the test lead and measure 4 wire resistance Use the SOURCE HI and the SOURCE LO port for measurement and the SENSE HI and SENSE LO port for sensing Note When switching from a high range to a low range please allow a m...

Page 24: ...compensation function Auto Range Press the Up and Down arrow keys to manually select the resistance range Manual Press the AUTO MAN key to use automatic ranging Selection List Range Resolution 7 meas s 30mΩ 1uΩ 300mΩ 10uΩ 3Ω 100uΩ 30Ω 1mΩ 300Ω 10mΩ 3kΩ 100mΩ 30kΩ 1Ω 300kΩ 10Ω 3MΩ 100Ω Note For detailed specifications please see the specifications on page 51 ...

Page 25: ...ch between the LO and HI rates LO rate The low rate is shown with a full scale of 5 digits in the resistance measurement mode HI rate The high rate is shown with a full scale of 4 digits Note For detailed specifications please see the specifications on page 49 Using the Trigger Function Background The GOM 802 can use internal or manual triggering for the resistance temperature and temperature comp...

Page 26: ...INT to return the triggering mode back to internal mode The EXT indicator will become cleared from the display Compare Function Background The compare function compares a measured value to a Normal value that has an upper HI and lower LO limit The upper and lower limit is set as a percentage of the Normal value A measured value that falls within the upper and lower limits is considered a GO pass a...

Page 27: ... setting 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 33000 00000 Press ENTER to confirm the setting Note After setting the Normal value the HI and LO limits will be changed to reflect the new Normal value setting 3 HI limit setting Press HIGHSCAN to set the HI percentage limit Use the...

Page 28: ...own arrow keys to edit the value of the selected digit Range 000 999 Press ENTER to confirm the setting Save Compare Settings Background The save function saves the Normal High and Low limit settings in memory 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 Save mode Press SHIFT RECALL to acce...

Page 29: ...e function Note Pressing SHIFT before pressing ENTER will exit the Save mode Recall Compare Settings Background The Recall function retrieves the Normal High and Low limit settings from one of 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 Press SHIFT RECALL to...

Page 30: ...function Note Pressing SHIFT before pressing ENTER will exit the Recall mode Buzzer Function Background The buzzer function can make the buzzer sound when the compare test has passed GO or failed NOGO The buzzer settings are only applicable in Compare mode 1 Select Buzzer Function Press the SHIFT key and then press LOW key 2 Buzzer function display appears Press the Up and Down arrow key to choose...

Page 31: ...lue 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 1 Select Buzzer Function Press the SHIFT key and then press the REL VALUE SHIFT 2 Percentage display appears 3 Return to normal display Press the SHIFT key and then press the REL VALUE Note The Auto range function will be disabled when using ...

Page 32: ...h the displayed measurement 1 Set the Reference value Press the REL VALUE key 2 Relative mode display appears REL Indicates the Relative function is active Note The Auto range function will be disabled when using compare mode with the relative function Temperature Measurement Background The temperature measurement function uses the optional PT 100 temperature probe The measured temperature is disp...

Page 33: ... on the NORMAL display 3 Temperature mode connection The temperature sensor uses the rear panel TC port for input Relative Function Background The Relative function can also be used with the temperature function The temperature displayed is the temperature of the sensor minus the temperature of the sensor when the REL VALUE key was pressed 1 Set the Reference value Press the REL VALUE key 2 Relati...

Page 34: ...erature compensation mode Press SHIFT COMPTEMP to access the main function mode Press the Up and Down arrow keys to select the TC measurement mode shown above There are three different modes resistance temperature and temperature compensation mode Press ENTER to confirm 2 Temperature compensation mode appears Edit the desired temperature and the temperature coefficient of the DUT Use the Left and ...

Page 35: ...ompensation function Auto Range Press the Up and Down arrow keys to manually select the resistance range Manual Press the AUTO MAN key to use automatic ranging Relative Function Background The Relative function can also be used with the temperature compensation function 1 Set the Reference value Press the REL VALUE key 2 Relative mode display appears REL Indicates the Relative function is active ...

Page 36: ...6 HANDLER 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: ...emale Pin Assignment START Start the trigger for a single measurement Negative edge trigger READY High when the measurement has finished The instrument is ready for the next trigger EOT High when the AD conversion has completed The DUT is ready to be changed LOW High when the compare result is deemed LO HIGH High when the compare result is deemed HI FAIL High when the compare result is either HI o...

Page 38: ...ols the relay output Pass Pass signal Indicates a GO compare result is GO pass Low Low signal Indicates a LO compare result High High signal Indicates a HI compare result Clock The clock signal will pulse high when each group of output signals Ready Pass Low High are ready There are up to 100 groups of output signals STRB After all 100 output groups are ready the STRB signal will pulse high Scan S...

Page 39: ... ENTER to confirm 3 Resistance mode and Compare display appears 4 Resistance Range Press the Up and Down arrow keys to manually select the resistance range 5 Select the Scan mode Press SHIFT NORMALSCAN to access the scan mode Press the Up and Down or Left and right arrow keys to select the number of counts Count range 0 100 Press ENTER to confirm 6 Select the Delay time Press the Up and Down or Le...

Page 40: ...rt the scan Press the MANUAL TRIGINT key to start the sweep measurements The results will be displayed on screen and output through the scan port until finished 9 View Results Press the Up and Down arrow keys to cycle through each result The measurement number will be displayed on the Normal display and the measurement on the main screen 10 Exit Scan mode Press SHIFT NORMALSCAN at any time to exit...

Page 41: ...under different conditions are shown below Ready message displayed After the MANUAL TRIGINT key is pressed Relay Pass Low High Clock STRB 1 2 99 100 Scan channel 1 Delay time has elapsed Scan channel n delay time has elapsed Scan Channel 100 Delay time has elapsed Scan output signal timing ...

Page 42: ... 24 pin female GPIB port RS 232 DB 9 male port Configure GPIB Interface Background The GPIB interface is SCPI 1994 IEEE488 1 and IEEE488 2 compliant 1 Select the GPIB address Press SHIFT LOCALGPIB RS232 to access the GPIB RS232 settings Press the Left or Right arrow key to enter the GPIB address settings or Press the Up and Down arrow keys to set the GPIB address GPIB Address 0 31 Press ENTER to c...

Page 43: ...t baud rate parity data bits stop bit and data control settings are used Settings Baud rate 1200 2400 4800 9600 Parity None Data bits 8 Stop bit 1 Data flow control None 1 Select the RS 232 baud rate Press SHIFT LOCALGPIB RS232 to access the GPIB RS232 settings Press the Up and Down arrow keys to set the baud rate Baud rate 1200 2400 4800 9600 Press ENTER to confirm The display goes back to the ma...

Page 44: ...ked Interface Function Check Operation Run this query from the terminal idn This should return the Manufacturer Model number and Firmware version GW Inc GOM 802 FW1 00 Function Check Errors If you do not receive a proper response from the Meter please check if the power is on the GPIB address RS232 baud rate is correct and all cable connections are active ...

Page 45: ... 000 counts the measurement speed is 7 readings s at 3 000 counts the measurement speed is 30 readings s The GOM 802 performance does not match the specifications Make sure the device is powered on for at least 30 minutes within 18 C 28 C with a humidity not exceeding 80 This is necessary to stabilize the unit to match the specifications If there is still a problem please contact your local dealer...

Page 46: ...ure Measurement Reference Temperature Table 48 RTD SensorsTemperature 49 Optional Platinum Sensor 49 Specifications Resistance Measurement 51 Temperature Measurement 52 Temperature Correction Function 52 Interface 53 Environmental 53 General 53 CE Declaration Declaration of Conformity 54 ...

Page 47: ...7 Fuse Replacement Replace the AC source fuse Steps 1 Remove the power cord 220 1 0 0 120 230 2 Remove the fuse socket using a flat screwdriver 220 1 0 0 120 230 3 Replace the fuse in the holder 220 1 0 0 120 230 ...

Page 48: ...d calibration points as of 1990 Element Type Temperature K C H2 Hydrogen Triple point 13 8033 259 3467 Ne Neon Triple point 24 5561 248 5939 O2 Oxygen Triple point 54 3584 218 7916 Ar Argon Triple point 83 8058 189 3442 Hg Mercury Triple point 234 325 38 8344 H2O Water Triple point 273 16 0 01 Ga Gallium Melting point 302 9146 29 7646 In Indium Freezing point 429 7485 156 5985 Sn Tin Freezing poin...

Page 49: ...atinum Sensor Introduction The optional platinum sensor is a PT 100 sensor The PT 100 sensor meets the German DIN43760 1968 3 wire measurement specification These sensors are one of the most common temperature sensors used in industry These sensors have a nominal resistance of 100Ω at 0 C The relationship between temperature and resistance for the PT 100 sensor can be described with the Gallendarv...

Page 50: ...0 RTD at 100 C T The following R0 Ωat 0 C alpha beta and delta values are used for the PT 100 RTD T 100 C R0 Ω at 0 C 100Ω Alpha 0 003850 Beta 0 10863 Delta 1 49990 A B and C are calculated according to equations listed above A 0 00391 B 5 77e 7 C 4 18e 12 The resistance of the RTD at 100 C R100 is then calculated as follows R100 R0 1 AT BT2 CT3 T 100 100 1 0 00391 100 5 77e 7 1002 4 18E 12 1003 1...

Page 51: ...00mA 0 05 3 1 772V 30Ω 1mΩ 10mA 0 05 2 1 772V 300Ω 10mΩ 1mA 0 05 2 1 772V 3kΩ 100mΩ 100μA 0 05 2 1 770V 30kΩ 1Ω 100μA 0 05 2 4 570V 300kΩ 10Ω 10μA 0 05 2 4 526V 3MΩ 100Ω 1μA 0 05 2 4 148V 3000 counts Accuracy speed 30 readings second 5 counts When the instrument is set to 30mΩ or 300mΩ ranges the resistance value will be changed while connecting or disconnecting the test lead to the panel due to t...

Page 52: ...0 3 1 0 C 0 3 3 C Temperature Correction Function Temperature correction range 0 0 C 39 9 C Reference temperature range 0 C 99 9 C Thermal coefficient range 9999 ppm Temperature range Accuracy of temperature compensation for 3930 ppm Cu wire speed 7 readings second 0 C 39 9 C 0 3 resistance measurement accuracy 40 C 100 C 0 6 resistance measurement accuracy The temperature coefficient for the othe...

Page 53: ... compare mode is enabled RS 232 GPIB option IEEE488 1 1987 IEEE488 2 1992 and SCPI 1994 The Scan and Handler interface use the same connector Environmental Operation Environment Indoor use altitude up to 2000m Ambient Temperature 0 C to 40 C Relative Humidity 80 Maximum Installation category II Pollution Degree 2 Storage temperature 10 C to 70 C General Power source AC 100V 120V 220V 230V 10 50 60...

Page 54: ...Harmonics EN 61000 3 2 2006 A1 2009 A2 2009 Surge Immunity EN 61000 4 5 2006 Voltage Fluctuations EN 61000 3 3 2008 Conducted Susceptibility EN 61000 4 6 2009 Electrostatic Discharge EN 61000 4 2 2009 Power Frequency Magnetic Field EN 61000 4 8 2010 Radiated Immunity EN 61000 4 3 2006 A1 2008 A2 2010 Voltage Dip Interruption EN 61000 4 11 2004 Safety Low Voltage Equipment Directive 2014 35 EU Safe...

Page 55: ...rview measurement 22 Percentage setting 31 Power supply safety instructions 5 Power up 18 PT 100 sensor temperature calculation 49 Rate setting 25 Rear panel overview 16 Reference temperature table 48 50 Relative function setting 32 33 Resistance setting 23 Resistance measurement connection 19 Safety instruction Guidelines 5 Safety instructions fuse 5 power supply 5 symbol 4 Scan overview 38 setti...

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