General GT320 User Manual Download

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WIRELESS DATA LOGGING

MULTIMETER

WITH DOT MATRIX LCD

PLUS NCVD/NCCD

USER’S MANUAL

GT320

Please read this manual carefully and thoroughly before using this product.

(laptop not included)

(includes RD330
Remote Display
with Memory)

Summary of Contents for GT320

Page 1: ...TA LOGGING MULTIMETER WITH DOT MATRIX LCD PLUS NCVD NCCD USER S MANUAL GT320 Please read this manual carefully and thoroughly before using this product laptop not included includes RD330 Remote Display with Memory ...

Page 2: ...ge 12 13 Measuring Resistance or Capacitance 13 Checking the Integrity of a Diode or the 14 Continuity of a Circuit Measuring DC or AC Current 14 15 Non Contact AC Voltage Current Detection NCVD NCCD 15 Going Wireless 16 19 Transmitting Data to a PC 16 18 Receiving and Displaying Data from a Second GT320 or a GT310 18 19 Specifications 19 22 Maintenance Tips 22 Optional Accessories and Replacement...

Page 3: ...sensitive it can pinpoint the location of a 30VAC line inside PVC conduit behind a wooden wall The NCCD sensor in the GT320 is equally impressive It can detect as little as 500 mA of current flowing behind a concrete or plaster wall under a floor above a ceiling in an overhead line or in a buried underground cable The NCCD sensor can also detect RF signals such as from a walkie talkie and magnetic...

Page 4: ...n this way 3 For even greater remote display versatility use the GT320 with the included RD330 Remote Display with Memory The standalone 4 in x 4 in unit which uses the same wireless transceiver module as the GT320 and GT310 can not only display the readings of two multimeters simultaneously on its own dual LCD with 0 67 in 17mm high digits it can also memorize up to 99 readings or pairs of readin...

Page 5: ... voltage and current detection NCVD and NCCD sensors with beeper CAT III 1000V CAT IV 500V ETL certified Wirelessly interfaces to PC at 2 4 GHz from up to 33 ft 10m away via included USB dongle Includes transceiver module for wirelessly interfacing to second GT320 or GT310 functionally identical model with 7 segment display or included RD330 Remote Display with Memory Choice of 10 channels for eac...

Page 6: ...e meter s safety features may be compromised Before using the meter inspect the case Do not use the meter if it is damaged Look for cracks or missing plastic Pay particular attention to the insulation around the connectors WARNING Inspect the test leads for damaged insulation or exposed metal Check the test leads for continuity Replace damaged test leads before using the meter For safety reasons y...

Page 7: ...the red test lead when disconnecting disconnect the red test lead before disconnecting the black test lead Disconnect circuit power and discharge all high voltage capacitors before measuring testing resistance continuity diodes or capacitance For all DC functions in both auto ranging and manual ranging modes to avoid the risk of shock due to possible improper reading verify the presence of any AC ...

Page 8: ...amiliarize yourself with their functions as explained below before moving on to the Setup Instructions and Operating Instructions 1 Replaceable 2 4GHz transceiver module on top of unit 2 NCCD sensor on top of unit 3 NCVD sensor on top of unit 4 Dot matrix LCD 5 Backlight 8 GT320 Fig 1 The GT320 s controls indicators and connectors ...

Page 9: ...de Tx and Rx both appear on display d Press briefly a fourth time to disable transmission and reception Tx and Rx both disappear e With rotary dial in any position but OFF press and hold for 3 seconds to power meter on or off 8 Adj Zero button press briefly to reset readout 9 Two function Buzzer button a Press briefly to turn backlight on off b Press and hold for 3 seconds to turn beeper on off ap...

Page 10: ... within 10 seconds readout s revert to showing real time measurements 12 Rotary dial 13 COM jack for black negative test lead 14 Jack for red positive test lead 15 Battery compartment on back of unit 16 Black negative test lead 17 Red positive test lead Contains fast acting ceramic fuse rated at 500mA 500V 18 Protective caps for test leads The table below explains the symbols and abbreviations use...

Page 11: ...angular yellow plastic battery compartment cover Set the cover aside Install a fresh 9V battery in the compartment with the terminal anode on the right with the back of the meter facing you Replace the battery compartment cover and resecure it with the two screws INSERT TEST LEADS Plug the red fused test lead into the right red socket on the front of the meter and plug the black lead into the blac...

Page 12: ...he meter turn the rotary dial to the OFF position To ensure the accuracy of measurements make sure that the points touched by the test probes are free from dirt oil lacquer and similar substances Until you enable wireless transmission and or reception the meter will function in normal operating mode with a display that looks like this MEASURING DC OR AC VOLTAGE F Do not exceed maximum ratings Do n...

Page 13: ...ESISTANCE OR CAPACITANCE Before measuring resistance or capacitance be sure to remove power from the circuit under test and to discharge any high voltage capacitors in it Turn the rotary dial to the Ω position The unit MΩ will appear at the right of the display The word AUTO will appear at the top left indicating that the meter is in Autoranging mode To measure the resistance between two points of...

Page 14: ... is reversed This test can be used to distinguish the anode and cathode of a diode To enter Continuity Check mode briefly press the Select 0 9 button once with the diode symbol showing on the display This will change the diode symbol to the Ω unit If the icon is not visible at the right of the display activate the beeper by pressing the Buzzer button In Continuity Check mode the initial reading wi...

Page 15: ... the Range button NON CONTACT AC VOLTAGE CURRENT DETECTION NCVD NCCD Turn the rotary dial to the NCVD or NCCD position Move the meter at least several feet away from all wiring and briefly press the Adj Zero button This maximizes the sensitivity of the NCVD or NCCD sensor Holding the meter in your hand slowly move its top toward the known or suspected source of voltage or current As the meter appr...

Page 16: ...SF05_Setup zip to your desktop 4 Click the Open button on the icon 5 Highlight GTSF05_Setup msi 6 Use a utility like WinRAR to extract GTSF05_Setup msi to your desktop 7 Double click GTSF05_Setup msi doing so opens a window titled Welcome to the DMMD_PCViewSetupWizard Click Next 8 Click Next to install DMMD_PCView on your computer in a folder named C ProgramFiles x86 DMMD_PCView To install the pro...

Page 17: ...ashing over R 0 Quickly within 10 seconds press the Select 0 9 button once to advance the channel counter to 1 Quickly save the setting by pressing and holding the Hold CH button 17 On the DMMD_PCView GTSF05 screen click the Scan CH button The program will begin scanning Channels 0 through 9 Scanning will stop when the GT320 s transmission on Channel 1 is detected causing the button to turn green ...

Page 18: ...your GT320 will operate in standby receive mode until you synchronize its receiving channel with the transmitting channel of the other meter Before you synchronize the two meters the display will look like this After you synchronize the two multimeters the new display will duplicate the data shown on the second meter and look like this To match the receiving channel of your GT320 to the transmitti...

Page 19: ...rix LCD with 0 67 in 17mm high digits Sampling Rate 3 times 1 sec Maximum Voltage Measurement DC 1kV AC 750V Input Impedance in Voltage Measurement Mode 10MΩ Maximum AC DC Current Measurement 400mA Maximum Resistance Measurement 40MΩ Maximum Capacitance measurement 100uF Diode Integrity Test Voltage 1 5V Continuity Check Threshold 30Ω with beeper Non contact AC Voltage Detection Range 50V to 1 kV ...

Page 20: ... 0 01V 0 6 of reading 3 digits 0 400V 0 1V 0 6 of reading 3 digits 0 750V 1V 1 0 of reading 5 digits DC Voltage Manual Range Range Resolution Accuracy 0 400mV 0 1mV 0 6 of reading 2 digits 0 4V 0 001V 0 6 of reading 2 digits 0 40V 0 01V 0 6 of reading 2 digits 0 400V 0 1V 0 6 of reading 2 digits 0 1000V 1V 0 8 of reading 2 digits AC Current uA Setting Manual Range Range Resolution Accuracy 0 400uA...

Page 21: ...1kΩ 0 6 of reading 2 digits 0 400kΩ 0 1kΩ 0 7 of reading 2 digits 0 4MΩ 0 001MΩ 1 5 of reading 5 digits 0 40MΩ 0 01MΩ 2 0 of reading 6 digits Capacitance Manual Range Range Resolution Accuracy 0 52nF 0 01nF 3 of reading 7 digits 0 520nF 0 1nF 3 of reading 5 digits 0 5 2uF 0 001uF 3 of reading 5 digits 0 52uF 0 1uF 10 of reading 10 digits 0 100uF 0 1uF 10 of reading 10 digits Diode Integrity Check ...

Page 22: ...s and temperature extremes Do not turn on the meter immediately after it has been taken from a cold to a warm environment The condensation that may result could destroy the unit Leave the meter switched off and wait until it reaches room temperature Remove the battery when you do not expect to use the unit for a long period of time several months Clean the display by wiping it with a damp soft clo...

Page 23: ...vice center freight prepaid and insured Acceptance of the exclusive repair and replacement remedies described herein is a condition of the contract for purchase of this product In no event shall General be liable for any incidental special consequential or punitive damages or for any cost attorneys fees expenses or losses alleged to be a consequence of any damage due to failure of or defect in any...

Page 24: ...12 431 6100 FAX 212 431 6499 TOLL FREE 800 697 8665 e mail sales generaltools com www generaltools com GT320 User s Manual Specifications subject to change without notice 2012 GENERAL TOOLS INSTRUMENTS NOTICE WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS MAN GT320 7 12 12 ...

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