Table of Contents
Related Manuals for General GT320
Summary of Contents for General GT320
- Page 1 WIRELESS DATA LOGGING MULTIMETER WITH DOT MATRIX LCD PLUS NCVD/NCCD USER’S MANUAL (includes RD330 Remote Display with Memory) (laptop not included) GT320 Please read this manual carefully and thoroughly before using this product.
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Page 2: Table Of Contents
Operating Instructions ......12 – 19 General Instructions ....... 12 Measuring DC or AC Voltage . -
Page 3: Introduction
“live” without the user having to “tap” all the lines. It is so 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. - Page 4 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.
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Page 5: Key Features & Specs
• 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 each wireless link •... -
Page 6: What's In The Box
WHAT’S IN THE BOX The GT320 comes in a black soft pouch with a belt loop inside a box. Also inside the pouch are: • A pair of fused test leads (General Part No. TL300) • A USB dongle (General Part No. GTSF05) for wireless viewing of the meter’s display on a PC. - Page 7 • !WARNING Do not measure voltages above 600V in CAT III installations. • !WARNING Do not measure voltage with the rotary dial pointing to the resistance (ohms), current, capacitance or NCVD or NCCD positions. Never measure current with the dial pointing to the resistance (ohms), capacitance or NCVD or NCCD positions.
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Page 8: Product Overview
PRODUCT OVERVIEW Fig. 1 shows the labels and positions of the controls, indicators and connectors on the front and top of the GT320. Familiarize yourself with their functions, as explained below, before moving on to the Setup Instructions and Operating Instructions. - Page 9 6. Two-function Range button: a) In all measurement modes, press briefly to exit Auto ranging mode (default) and enter Manual Ranging mode. With two exceptions (the highest voltage ranges), each subsequent brief press of the button decreases the measurement sensitivity (increases the full-scale measurement range) by a factor of 10 (one decimal place) b) In all measurement modes, press and hold for >3 seconds to...
- Page 10 c) In channel entry mode (with channel number flashing in top or bottom readout), press briefly to increment channel number. Pressing the button briefly with the display showing CH-9 resets readout to CH-0 11. Two-function Hold/CH button: a) Press briefly to hold (freeze) reading(s). Press briefly again to release hold.
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Page 11: Setup Instructions
Non-Contact Current (AC) Detection SETUP INSTRUCTIONS INSTALL BATTERY The battery of your GT320 may or may not already be installed. If the display remains dark after you turn the rotary dial to any position other than OFF: • Return the rotary dial to the OFF position. -
Page 12: Operating Instructions
OPERATING INSTRUCTIONS GENERAL INSTRUCTIONS • To hold (freeze) a reading, briefly press the Hold/CH button. • To turn the beeper on or off, briefly press the Buzzer button. • To turn the backlight on or off, press and hold the Buzzer button for >3 seconds. -
Page 13: Measuring Resistance Or Capacitance
Touch the test leads to two points in a circuit at different electric potential. A minus sign (–) at the left of the reading indicates a negative voltage. To switch to Manual Ranging mode, press the Range button briefly once to remove the AUTO indication from the top left of the display. With two exceptions (the highest ranges), each subsequent brief press of the button decreases the measurement sensitivity (increases the full-scale measurement range) by a factor of 10 (one decimal place). -
Page 14: Checking The Integrity Of A Diode Or The
CHECKING THE INTEGRITY OF A DIODE OR THE CONTINUITY OF A CIRCUIT Before checking a diode or checking for continuity, be sure to remove power from the circuit under test. Turn the rotary dial to the position. With the symbol M at the right of the display, briefly press the Select/0-9 button once to call up the diode symbol... -
Page 15: Non-Contact Ac Voltage/Current Detection (Ncvd/Nccd)
The default mode is DC current measurement (indicated by the symbol near the top left of the display). To measure AC current, press the Select/0-9 button to change the symbol to Touch the test leads to two points in the circuit and read the displayed value. -
Page 16: Going Wireless
GOING WIRELESS Transmitting Data to a PC Use the following procedure to enable your GT320 to display its readings on a PC monitor using digits that are several inches high— large enough to be visible across a room. You will first download and install the software that enables your GT320 to communicate with the GTSF05 wireless USB receiver (dongle) supplied with the meter. - Page 17 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.
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Page 18: Receiving And Displaying Data From A Second Gt320 Or A Gt310
Power/Tx/Rx/Ax button a second time. The term T0 will be replaced by the term R0. In “receive only” mode, your GT320 will not display any of its own measurements; it will only display measurements from a second wireless multimeter. -
Page 19: Specifications
GT320 and the lower reading will represent data from the second multimeter. The composite display will look like this: SPECIFICATIONS GENERAL SPECIFICATIONS • Maximum Voltage between Terminal and Ground: 1000V/CAT III; 500V/CAT IV • Test Leads Characteristics: Double sheath, soft PVC wire fitted with 500mA/500V fast-acting ceramic fuse measuring 6mm across x 32mm long. - Page 20 • Power Consumption: <3mA (standby mode); <20mA (normal operating mode); <25mA (transmitting mode); <60mA (receiving mode); <80mA (transmit + receive mode) • Dimensions (Excluding Test Leads): 7.1 x 3.7 x 2.1 in. (180 x 95 x 54mm) • Weight (Excluding Battery): 1 lb. (450g) MEASUREMENT RANGES, RESOLUTIONS &...
- Page 21 AC Current (mA Setting, Manual Range Range Resolution Accuracy 0-40mA 0.01mA ±0.15% of reading ±5 digits 0-400mA 0.1mA ±0.15% of reading ±5 digits DC Current (mA Setting, Manual Range) Range Resolution Accuracy 0-40mA 0.01mA ±0.15% of reading ±5 digits 0-400mA 0.1mA ±0.15% of reading ±5 digits Resistance (Manual Range)
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Page 22: Maintenance Tips
1 count when signal strength >0010 MAINTENANCE TIPS The GT320 is not waterproof or water-resistant; avoid water, toxic environments 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. -
Page 23: Warranty Information
The defective unit must be returned to General Tools & Instruments or to a General- authorized service center, freight prepaid and insured. - Page 24 New York, NY 10013-3567 PHONE (212) 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...