User's Guide LCD Multifunction Voltage Tester Model VT30
Introduction Congratulations on your purchase of the Extech VT30 Multifunction Voltage Tester. The VT30 measures AC voltage to 480V and DC Voltage to 690V with LCD readout, stepped voltage bargraph indicator, and LEDs for positive and negative polarity. Additional features include audible continuity beeper, low impedance test for eliminating phantom voltages, and a built-in flashlight to illuminate test connections during measurements.
Description 1 1. Test Probe L1 (-) 2. Test Probe L2 (+) 3. Flashlight 4. LCD display 5. LED (AC voltage indicator [between 100 to 480V]) 6. LED (low impedance test) 7. LED (continuity) 8. Low impedance test button (L2) 9. Flashlight button 2 3 4 11 10. Battery cover 5 6 7 8 11. Low impedance test button (L1) 9 10 3 VT30-US-EN-V4.
Operation Always test the meter on a known live circuit before taking measurements Voltage Measurement 1. Note: The voltage tester will turn on automatically when voltages higher than 4.5V AC/DC are detected. 2. Touch the positive (L2) and negative (L1) test leads to the device or circuit under test. 3. If the voltage is higher than 4.5V AC/DC, the LCD will light and display the reading. The stepped voltage bargraph scale in the display will also indicate the reading. 4.
3-Phase Rotation The 3-phase rotation function indicates whether the 3 phase AC lines or mains are live and also identifies the phase orientation of the three wires before attaching them to a motor or other equipment. The phase sequence will determine the direction (Clockwise or Counter-clockwise) a motor will rotate when connected. To determine clockwise rotation (P1-P2-P3) 1. 2. 3. 4. 5. 6. Touch probe L1 to any one of the three AC mains. Label this phase P1. Touch probe L2 to the other two phases.
Maintenance Battery replacement 1. The BAT icon will appear in the lower right of the display when the battery voltage becomes low. Replace the batteries when this appears. 2. Disconnect the meter from any test device or circuit before opening the tester. 3. Loosen the recessed Phillips head screw at the bottom of the tester. Do not remove the screw. 4. Hold the meter and pull the lower portion of the meter off until the batteries are exposed. 5.
Specifications LCD display 1999 counts (3-1/2 digits) with bargraph and backlight Resolution 1 Volt AC Voltage range 0 to 480V ACV frequency range 50/60Hz DC Voltage range 0 to 690V Accuracy ACV ±(1.5%rdg + 5d); DCV ±(1.0%rdg + 3d) Range selection Automatic Max measuring current ≤1.0mA (400VAC); ≤1.
Warranty EXTECH INSTRUMENTS CORPORATION (a FLIR company) warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department for authorization. Visit our website www.extech.com for contact information.
