Extech ET34 Voltage and continuity tester Datasheet

User’s Guide
Model ET34
Voltage and Continuity Tester
International Safety Symbols
This symbol, adjacent to another
symbol or terminal, indicates that
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
Safety Precautions
1. Improper use of this meter can cause
damage, shock, injury or death. Read
and understand this manual before use.
2. Ensure that any covers or battery doors
are properly closed and secured before
use.
3. Inspect the condition of the test leads
and the meter itself for any damage
before use.
4. Do not exceed the rated input limits.
5. Use great care when taking
measurements greater than 25VAC rms
or 35VDC. These voltages are
considered a shock hazard.
6. Discharge capacitors and remove power
from the DUT before Continuity tests.
7. Remove the batteries from the meter if
the meter is to be stored for long periods.
8. Voltage measurement results on
electrical outlets can be misleading
because of the difficulty in making a
proper connection to the electrical
contacts.
2
Tester Description
1. Negative lead (-)
2. Positive lead (+)
3. Voltage display
4. Voltage detect LED
5. Continuity LED
6. Polarity indication
7. Battery compartment
3
4
5
6
7
1
Operation
Always test the meter on a known
live circuit before taking
measurements
Voltage Measurement
1. Note that batteries are NOT
needed in the tester to take
voltage measurements.
2. Remove the plastic caps that
cover the test lead tips.
3. Touch the positive and negative
test leads to the device or
circuit under test.
4. The LEDs will light on the
tester’s voltage scale. The number of
LEDs that light depends upon the value
of the measured signal. The LED trip
point is 50% of the lower and higher
value.
5. For AC voltage, both the plus and the
minus sign LEDs will light. For DC, either
the plus (for positive voltage) or the
minus (for negative voltage) LED will
light.
6. When voltage is detected, the meter
sounds an audible alert.
Note: The test current for voltage
measurements decays to approx. 4mA after
5 seconds of use. Measuring from hot to
ground may trip any GFCI equipped circuits.
Single Lead AC Voltage Detection
To check for the presence of
voltage (>100VAC) using only the
positive test lead, touch the lead
to the device or circuit under test.
If voltage is present, the meter will
sound an audible alert and light up
the voltage detect LED.
Note: In this mode, the actual
voltage is not displayed; only
the presence of voltage is detected.
Continuity Test
The tester can measure resistance and alert
the user if the resistance value is less than
200kΩ.
1. Before taking a continuity test, make
sure that power to the device or circuit
under test is off and that all capacitors
are discharged.
2. Touch the test tips to the device under
test.
3. If the resistance is less than 200kΩ, the
tester will sound an audible alert and the
Rx/Ω LED will light.
Maintenance
Specifications
Battery replacement
1. Disconnect the meter from any test
device or circuit before opening the
tester.
2. Loosen the recessed flat head
screw at the bottom of the tester.
Do not remove the screw.
3. Hold the meter and pull the lower
portion of the meter off until the
batteries are exposed.
4. Replace the two ‘AAA’ batteries
observing polarity and dispose
of the old batteries properly. Screw
5. Slide the meter back together and replace
the screw.
Voltage Test
Voltage LED steps
Cleaning
6. Before cleaning the tester, ensure that the
test leads are not connected to any circuit
or device.
7. Dampen a cloth with a mild detergent and
use it to clean the meter. Do not use
abrasives or solvents.
WARRANTY
EXTECH
INSTRUMENTS
CORPORATION
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 on
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 at (781) 890-7440
ext. 210 for authorization or visit our website at
www.extech.com (click on ‘Contact Extech’ and go to
‘Service Department’ to request an RA number). A
Return Authorization (RA) number must be issued
before any product is returned to Extech. The
sender is responsible for shipping charges, freight,
insurance and proper packaging to prevent
damage in transit. This warranty does not apply to
defects resulting from action of the user such as
misuse, improper wiring, operation outside of
specification, improper maintenance or repair, or
unauthorized modification. Extech specifically
disclaims any implied warranties or merchantability
or fitness for a specific purpose and will not be
liable for any direct, indirect, incidental or
consequential damages. Extech's total liability is
limited to repair or replacement of the product. The
warranty set forth above is inclusive and no other
warranty, whether written or oral, is expressed or
implied.
AC/DC detection
Audible signal
Range selection
Response time
Frequency range
Test current
Peak current
± 12, 24, 120,
240, 277, 480V
Automatic
Voltage &
continuity
Automatic
< 0.1 seconds
0 to 65Hz
Approx. 4mA
< 0.2A
Single Lead Volt Detector
Voltage range
100 to 480V AC
Frequency range
50 to 400Hz
Continuity Test
Resistance range
Test current
Overvoltage protection
0 to 200kΩ
3 µA
690V AC/DC
General
Power supply
Two 1.5V AAA
cells
Power consumption
30mA / approx.
250mW max.
Operating Temperature 14 to 131°F
(-10°C to 55°C)
Relative Humidity
< 85% RH
Altitude
< 2000m
Overvoltage class
CAT III / 600V
Pollution degree
2
Type of protection
IP54
Weight
4.6 oz. (130g)
Dimensions
8.3 x 1.6 x 0.9”
(210x40x22mm)
Support Hotline (781) 890-7440
Tech support: Ext. 200; Email: [email protected]
Repair/Returns: Ext. 210; Email: [email protected]
Website: www.extech.com
Version 1.2 July 2002
Copyright © 2002 Extech Instruments Corporation.
All rights reserved including the right of
reproduction in whole or in part in any form.
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