Related Manuals for FLIR EXTECH CT80
Summary of Contents for FLIR EXTECH CT80
- Page 1 User Guide AC Circuit Load Tester For use on EPD, GFCI, and AFCI Circuits Model CT80 ShopExtech 1.877.766.5412 Shop for Extech products at:...
- Page 2 Introduction Thank you for selecting the Extech CT80 AC Circuit Load Tester. This device detects circuit and wiring problems such as: Poor ground impedance, false grounds, missing ground fault protection, low voltage availability under load, and high ground-to-neutral voltage. The CT80 can be used reliably on GFCI, EPD, and AFCI circuits.
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Page 3: Safety Symbols
Safety Safety Symbols This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information. This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages may be present. Double insulation Earth Ground This WARNING symbol indicates a potentially hazardous situation, which if not WARNING... -
Page 4: Meter Description
Description Meter Description AC power cable connection Test menu Hot-Neutral-Ground coded measurement result Primary reading display Secondary reading display LED test status indicators GFCI test button Down arrow button Right arrow button 10. AFCI test button (Note: AC Power Cord not pictured) Display Description Amps or Amperes (Current) Voltage... -
Page 5: Operation Overview
Operation Overview The CT80 AC Circuit Load Tester can test outlets or circuits under load in a matter of seconds for proper wiring, reverse polarity, and the presence of a ground. The CT80 uses a simple menu-driven display to allow the user to quickly see line voltage, voltage drop under full load, ground-to-neutral voltage, and line impedance. - Page 6 Illustrated Measurement Result Codes and Legend The G, N, and H circles (representing Ground, Neutral, and Hot respectively) appear on the CT80s display and can be ON, OFF, or Flashing as shown in the legend and test result codes below. The two LED status indicators (located above the down arrow button) can be ON or OFF as shown in the legend and result codes below.
- Page 7 The Voltage (V) Measurement Menu The Voltage menu displays the True RMS line voltage. Use the ► button to scroll the Voltage sub- menu (line voltage, ground-to-neutral voltage, Peak Voltage (P), and Frequency (Hz)). The Voltage Drop (Vd) Measurement Menu The Voltage Drop (Vd) window indicates percent (%) voltage drop (with 15A load) and the Loaded Voltage (VL).
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Page 8: Testing Procedures
Testing Procedures Test 1: Wiring Verification The wiring configuration is the first test result that is displayed. Refer to the test result codes and legend presented earlier in the user guide. For wiring conditions other than normal, the CT80 is limited in the type of tests it can perform on a circuit until the circuit’s wiring issues are resolved. - Page 9 Test 3: Voltage Drop Measurements To determine voltage drop, the CT80 measures line voltage, factors in the load, measures the loaded voltage, and then calculates the voltage drop. Results for 12A, 15A, and 20A loads are provided. For nominal efficiency, a voltage drop of 5% is the maximum recommended by the National Electrical Code (NEC) board.
- Page 10 Test 5: Impedance (Z) Measurements The impedance measurement capability of the CT80 is used to check Hot and Neutral impedance when voltage drop measurements are too high (greater than 5%). To determine where the problem is, measure the impedances and analyze the data as follows: ...
- Page 11 Test 6: GFCI (Ground Fault Circuit Interrupter) Testing A ‘GFCI’ can protect personnel from shock hazards. The CT80 tests GFCI circuits by forming a Hot- Neutral imbalance, leaking small amounts of current (6 to 9 mA) from Hot to Ground through a fixed resistance.
- Page 12 Test 8: AFCI (ARC Fault Circuit Interrupter) Testing The CT80 w/AFCI applies 8 to 12 current pulses in less than a half second across hot-to-neutral with each pulse 8.3ms maximum in duration, with each pulse’s amplitude 106 to 141 amps in accordance with UL1436.
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Page 13: Maintenance
AFCI Troubleshooting Suggestions Measurement Expected Problem Possible Possible Result Causes Solutions AFCI Test AFCI trips AFCI AFCI installed Check wiring and re- does incorrectly wire device according not trip to manufacturer’s instructions AFCI Replace AFCI defective High source of Check for high voltage line drop impedance... -
Page 14: Specifications
IEC1010-1 (2001): EN61010-1 (2001) Overvoltage Category II 300V Pollution Degree 2. Copyright © 2012 Extech Instruments Corporation (a FLIR company) All rights reserved including the right of reproduction in whole or in part in any form www.extech.com...
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