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ET38-en-es-fr_V1.1   11/16 

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USER MANUAL 

 

Model ET38 

Screwdriver Voltage and 
Continuity Tester 

 

 

 

Voltage Testing 

To check a circuit for voltage, insert the 
screwdriver probe into the outlet or carefully 
touch probe to the electrical contact or 
conductor to be tested. Touch metal contact on 
the side of the tester housing with finger. If 
voltage is present, the LED indicator will light.  
 

WARNING: Do not touch the screwdriver 
tip with fingers. 

Continuity Testing 

1.

 

Before taking a continuity test, make sure 
that power to the device or circuit under 
test is disconnected and that all fuses are 
removed. 

2.

 

Touch the probe to one end of the 
conductor to be tested.  

3.

 

Place finger or hand on the metal plate 
located on the tester handle. 

4.

 

Use other hand to complete the circuit on 
the other end of the conductor. 

5.

 

If continuity is made, the LED indicator will 
light. 
 

WARNING: To avoid electric shock, never 
measure continuity on circuits that have 
voltage on them. 

 

CAUTION: Always test on a known live 
circuit before use to make sure tester is 
operating correctly and batteries are good. 

 
 

Replacing Battery 

To test the quality of the batteries, touch the 
contact point on the tester handle while 
touching the screwdriver tip. If the

 

LED indicator 

does not light, replace the batteries. 
1.

 

Use a screwdriver to remove the Philips 
screw and open the battery compartment. 

2.

 

Replace with two (2) button type LR44 or 
equivalent batteries. 

3.

 

Replace the cover and re-test. 

CAUTION: Use extreme caution when 
checking electrical circuits to avoid injury 
due to electrical shock. FLIR Systems, Inc. 
assumes basic knowledge of electricity on 
the part of the user and is not responsible 
for any injury or damages due to improper 
use of this tester. 

 

Specifications 

Voltage Range 

12~300V AC 

Frequency 

50/60Hz 

Power supply  

Two 1.5V button cell 
batteries 

Operating Temperature  

41 ~ 104°F

 

(5 ~ 40°C)

 

Relative Humidity 

80% RH Max.  
50% > 88°F (31°C) 

Altitude 

< 7000 ft. (2000m) 

Overvoltage class 

CAT II / 300V 

Pollution degree 

2 (accordance with 
IED-664) 

Recommended Use 

Indoor 

To clean, use a damp cloth only with no 
chemical detergents or alcohol. 

 

OVERVOLTAGE CATEGORY II 

Equipment of OVERVOLTAGE CATEGORY II is 
energy-consuming equipment to be supplied 
from the fixed installation 

 
 

Double Insulation: The meter is 
protected by double insulation or 
reinforced insulation 

 

Copyright © 2016 FLIR Systems, Inc. 

All rights reserved including the right of 

reproduction in whole or in part in any form 

ISO-9001 Certified 

                                

www.extech.com

 

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