Klein Tools Voltage Tester User Manual

  • . the voltage is DC. The tester MAY NOT detect voltage if:. the user is not holding the tester. the user is insulated from the tester with a glove or other materials. the wire is partially buried or in a grounded metal conduit. the tester is at a distance from the voltage source.
  • OPERATING INSTRUCTIONS Measuring Voltages Time spent operational at voltages above 220V must be less than 60 seconds, with a cool-off time of at least 5 minutes. Tester will turn on automatically when voltage is applied. ENGLISH GFCI Testing Check the GFCI Receptacle user.

Klein Tools ET250 is a solid-state, digital voltage and continuity tester. It measures AC/DC voltages up to 600V and tests for continuity. Additionally, the ET250 tests GFCI protected circuits to verify that the GFCI device is functioning appropriately. The tester includes a backlight and worklight for working in reduced ambient lighting.

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Fig. 1

Gently push down on locking tab.
Empuje suavemente hacia abajo sobre la lengüeta de fi jación.
Appuyez doucement sur la languette de verrouillage.

ENGLISH

SYMBOLS ON TESTER:

Warning. Risk of electric shock.

Risk of danger. Important information: It is important that users of this tester read, understand, and follow all

warnings, cautions, safety information, and instructions in this manual before operating or servicing this tester. Failure

to follow instructions could result in death or serious injury.

Double Insulated.

CAT IV Equipment is designed to protect against transients from the primary supply level.

(i.e. - electricity meter or overhead/ underground utility service).

OPERATING INSTRUCTIONS:

Modes of operation:

Klein Tools Voltage Tester Instructions

The NCVT-2 can operate as a dual range (NCVT-2 mode) or single range (NCVT-1 mode) tester. In NCVT-2 mode, the

tester will light a steady blue LED in the tip to indicate power-on and dual range mode. In NCVT-1 mode, the tester will

light a steady green LED in the tip to indicate power-on and single range mode.
Turn unit on:

Press and hold the power button for ½ second, then release. Listen for single-beep sound and watch for a steady green

or blue LED to illuminate in the tip of the tester. The tester is now activated and is operational. Test on known live circuit

to verify tester functionality. See Silent mode for additional power-on options.
Turn unit off:

Press and hold the power button for ½ second then release. Listen for a double-beep sound and watch the green or

blue LED turn off. The tester is now deactivated and is not operational.
System self-test:

The “power on” blue or green LED visually confi rms battery suffi ciency, system integrity, and operation/active mode.

Always test on known live circuit to verify tester functionality prior to use.
Changing operation modes:

While the unit is powered on, press and hold the power button for 2 seconds. The unit will beep 3 times and the power-on LED will

switch from blue to green or green to blue. The tester will start in whichever mode it was last powered off in.
Checking for the presence of AC voltage:

Prior to use, test on known live circuit to verify tester functionality. Place tip of the tester near an AC voltage and refer

to the tables below for each mode:

NCVT-2 mode:

POWER-ON

12 TO 48 VOLTS AC

48 TO 1000 VOLTS AC

Klein Tools Voltage Tester User Manual

Audible

Single Beep

Low-Pitched Pulsing Beeping Sound

High-Pitched Continuous Beeping Sound

Visual

Steady Blue LED

Blue LED Turns OFF and Red LED Blinks

(approximately 2-times per second).

Blue LED Turns OFF and Red LED

illuminates continuously.

NCVT-1 mode:

POWER-ON

12 TO 48 VOLTS AC

Klein Tools Voltage Tester User Manual

48 TO 1000 VOLTS AC

Audible

Single Beep

Voltage

No Sound

High-Pitched Continuous Beeping Sound

Visual

Steady Green LED

Steady Green LED

Green LED Turns OFF and Red LED

illuminates continuously.

In NCVT-2 mode, the tester will be more sensitive and will show voltage indication at a further distance away from a

high voltage source than in NCVT-1 mode. Use NCVT-1 mode in situations where you expect the voltage source will

be greater than 48V AC.
Low battery indication:

Scenario 1 – Powering on the tester: The “power on” LED in the tip of the tester changes from a steady green or blue to a

blinking green or blue and a series of beeping sounds is generated. The tester then turns off. The unit is now deactivated

Klein Tools Voltage Tester Directions

and is not operational, the batteries require replacement. To replace the tester batteries refer to the Maintenance section

Klein Tools Voltage Tester Mm300 Manual

titled “Battery Replacement.”
Scenario 2 – Operating the tester: If the LED lights dim and the tone fades, the tester may require new batteries. To

replace the tester batteries refer to the Maintenance section titled “Battery Replacement.”
Auto Power Off:

After 4 minutes of non-use, the tester automatically powers off to conserve battery life. Listen for a double-beep

sound and watch the “power on” LED turn off. The tester is now deactivated and is not operational.
Silent mode:

The tester can be operated with only visual indication of voltage. With the tester powered off, press and hold the

Klein Tools Ncvt 1 Voltage Tester Manual

power button for 2 seconds then release.

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