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User Manual
ET400
Non-Contact AC Voltage Detector and Phase
Sequence Indicator
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Introduction
Congratulations on your purchase of the Triplett ET400 Non-Contact AC
Voltage Detector and Phase Sequence Indicator. This meter is used to
quickly determines the presence of AC Voltage and ensure the
correct phase wiring sequence. It features high and low sensitivity
ranges, audible and visual indicators, and built-in flashlight.
Meter Description
1. Battery Cover (Screw On)
2. Flashlight Button
3. MODE Select Button
4. Power ON/OFF Button
5. LED Indicators
6. Detector Tip (Sensor)
7. Zoom In/Out Button
8. Flashlight
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Safety Information
Caution! Refer to the explanation in this Manual
Double Insulation or Reinforced insulation
CE Compliance
This device must not be handled by children. It contains
hazardous objects as well as small parts that can be swallowed.
Do not leave batteries and packing material unattended; they
can be dangerous for children. If unused for an extended
period of time, remove the batteries from this device Expired
or damaged batteries can cause cauterization on contact with
the skin; use suitable hand gloves in such cases. Ensure that
the batteries are not short-circuited. Do not throw batteries
into the fire.
WARNINGS
Read understand and follow safety rules and operating
instructions in the manual before using this tester.
Check on a known live source within the rated AC
voltage range of the tester before use to ensure
it is in working order.
Insulation type and thickness, distance from
the voltage source, shielded wires, and other
factors may affect reliable operation. Use
other methods to verify live voltage, if there is
any uncertainty.
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Do not use if the tester appears damaged or if it is not
operating properly. If in doubt, replace the tester.
Do not use on voltages that are higher than as marked on the
tester.
Use caution with voltages above 30 volts AC as a shock hazard
may exist.
Comply with all applicable safety codes. Use
approved personal protective equipment
when working near live electrical circuits
Operation
Power ON/OFF Button
Press the tester ON/OFF Button, the tester will beep once, and
the green LED and work light will illuminate to indicate that the
tester is working on high voltage mode and ready for use.
Press the ON/OFF Button one more time, the tester will beep
twice, and range LED will turn off.
Mode Select Function
When the tester is on with NCV function, short press the M
Button once, the green LED off and the yellow LED
illuminate to indicate that the tester is working on low
voltage mode.
Short press M Button again, the green and yellow LED flash
slowly alternately to indicate that the tester is working on
phase sequence test mode.
Short press M Button again, the yellow led off and the green
LED illuminate, the tester returns to high voltage mode.
The tester will beep once every M Button operation.
The M Button operation is valid only when the NCV function is
turned on.
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Verify Operation
Before using tester, (1) Make sure the green LED is glowing, (2)
Check tester on a known live AC voltage that is within the
defined detection range of the tester.
High Voltage Mode (100 to 1000V AC)
Place the tip of the tester near an AC voltage.
If the tester detects voltage within the defined detection range,
the green LED will turn off, the red LED will turn on, the beeper
will beep rapidly.
Low Voltage Mode (12 to 1000V AC)
Place the tip of the tester near an AC voltage. When AC voltage
is detected, the yellow LED will turn off, the red LED will flash
and the beeper will beep.
The flash rate and beeping rate will increase as the tester gets
closer to the voltage source.
If the tester detects high voltage, it will automatically change
over to the high voltage mode: The red LED will change to a
steady glow and the beeper will beep rapidly.
Note: An indication occurs when the tester is used to detect AC
to DC power supply, for example, the phone USB
cable/line is being charged with a socket.
Note: The tester cannot determine the actual voltage. The
voltage level where the tester switches from the low to high
voltage mode is affected by insulation type and thickness,
distance from the voltage source, and other factors.
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Phase Sequence Test Mode
Place the tip of the tester close to the L1 phase wire, the
tester will beep once, the green and yellow LED flash rapidly
alternately to indicate that the measurement of the first
phase sequence is complete.
Move the tip of the tester close to the L2 phase wire, when the
measurement is complete there will be two results:
1.The tester beep and green LED on about 5 seconds to
indicate that is Correct phase conformity (L2 is ahead of L1
120 degrees).
2.The tester beep and yellow LED on about 5 seconds to
indicate that is Incorrect phase conformity (L2 is lag of L1 120
degrees).
Test L1 and L3, L2 and L3 in the same way.
Note: To improve test accuracy, do not place the tester tip in the
middle of the two-phase lines
Auto Power Off
To conserve battery life, the tester will automatically turn off
after approximately 5 minutes of inactivity.
When powering down, the tester will beep twice and the mode
indication LED will turn off.
Flashlight
Momentarily press the Flashlight button to turn the flashlight
on or off.
To conserve battery life, the flashlight will automatically
turn off after approximately 5 minutes when the NCV
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function is off.
The tester will beep twice as the flashlight auto power off.
Changing Batteries
1. Carefully unscrew
battery cap at the
rear (flashlight end)of
the tester.
2. Replace batteries
with two AAA 1.5V
batteries. Observe
polarity. Carefully
align cover with
tester as shown below.
3. Screw cover onto tester until it feels tight. Do not use
excessive force.
4. Verify operation by using the tester on a known live AC
voltage within the defined detection range of the tester.
**Note: When batteries are loaded for the first time, please
remove the white, rectangular security strip before
installing batteries.
**Note: When replacing the batteries,be sure to secure the cap
firmly to maintain IP67 water and dust protection. A loose or
overtightened battery cap may compromise water and dust
protection.
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Specifications
AC Voltage Range
12 to 1000VAC
100 to 1000VAC
Phase Voltage Range 100 to 1000VAC
Frequency Range 50/60Hz
NCV Alarm Mode Audible and Visual
Phase Sequence Indicator Verifies correct L1, L2, L3
Phase Sequence Alarm
Mode
Audible with Green/Yellow Lights
Waterproof IP67
Power (2) AAA batteries
Safety Category CAT IV 1000V
Dimensions
Weight 2.6oz (72.8g)
Warranty
Triplett / Jewell Instruments extends the following warranty to the original
purchaser of these goods for use. Triplett warrants to the original purchaser
for use that the products sold by it will be free from defects in workmanship
and material for a period of (1) one year from the date of purchase. This
warranty does not apply to any of our products which have been repaired or
altered by unauthorized persons in any way or purchased from unauthorized
distributors so as, in our sole judgment, to injure their stability or reliability, or
which have been subject to misuse, abuse, misapplication, negligence,
accident or which have had the serial numbers altered, defaced, or removed.
Accessories, including batteries are not covered by this warranty
Copyright © 2022 Triplett
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