Greenlee Multifunction Electrical Tester

Efficiently Measure Amps, Volts and Resistance Without Touching a Button

Greenlee Multifunction Electrical Tester

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Greenlee Multifunction Electrical Tester

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  • Greenlee GT-540 multifunction electrical tester - icon
  • using the GT-540 electrical tester - icon
  •  closeup of the GT-540 tester buttons- icon

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Low Price GuaranteeWhat's special about this electrical meter?

GSA approved
  • Detects voltage in live lines without touching the wire, to minimize accidents and ensure a high degree of safety
  • Low impedance virtually eliminates stray or "ghost" voltage, providing a more accurate reading
  • When set to Auto-mode, this meter automatically selects the proper measurement based on input, to efficiently test any electrical circuit
  • Provides both audible and visual confirmation for clear, easy-to-understand test results
  • Click for More Features

This Multifunction Electric Tester by Greenlee will allow you to measure amperage, voltage, and resistance without the hassle of even turning a dial. This meter is equipped with a data hold element that saves important readings, as well as an Auto-Off feature that saves power to prolong battery life.

  • Measures AC / DC voltage with high impedance, which minimizes circuit loading for a pure measurement
  • Low battery indicator and auto shut-off for longer battery life
  • Data hold button to ensure proper logging of measurements
  • Audible diode and continuity testing available in one unit
  • Equipped with an internal memory to save test results
  • Lifetime limited manufacturer's warranty


Included Accessories:

  • 9V battery
  • Test leads
  • Carrying case


Part Number GL-GT-540
Display 6000-count LCD
Polarity Automatic
Display Update Rate 5 per second
Temperature Coefficient Nominal 0.15 x (specified accuracy) per °C below 18° C or above 28 °C
Power Off After 3 minutes of inactivity
Noise Rejection
Common Mode Rejection Ratio >60dB from 0Hz to 60Hz when measuring ACV
>100dB at 0Hz, 50Hz, and 60Hz when measuring DCV
Normal Mode Rejection Ratio >30dB at 50Hz and 60Hz when measuring DCV
Operating Conditions
Temperature 14° to 122° F (-10° to 50° C)
Relative Humidity (non-condensing) 80% Max for temperatures up to 88° F (31° C), decreasing linearly to 50% maximum at 122° F(50° C)
Altitude 2000m (6500') maximum Indoor use only
Pollution Degree 2
Storage Conditions 30° to 60° C (-22° to 140° F), 0% to 80% relative humidity (non-condensing); Remove battery
Battery 9 V (NEDA 1604, JIS 006P or IEC 6F22)
Overvoltage Protection 1000 VDC/VAC RMS, 50/60 Hz
Overload Warning (voltage mode only) Meter displays “OL” and beeps
Measurement Categories Cat III, 1000 V per UL 61010B-1
Cat IV, 1000 V per IEC 61010-1, 2nd edition
Auto V•Ω Mode Response Time 1 second maximum
AC Response Average-sensing, RMS calibrated
Resistance Measurement 600.0; 6.000, 60.00, 600.0 K; 6.000 M
Capacitance 100.00, 1000.0 µF; 10.00, 100.0, 2000 F
Display 6000-count LCD
Measurement Category CAT IV, 1000v per IEC 61010-1; CAT III, 1000v per UL 61010B-1
Voltage Measurement 6.000, 60.00, 600.0, 1000V
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