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September 2020 

©2020 Fluke Corporation. All rights reserved. 
Specifications are subject to change without notification. 
All product names are trademarks of their respective companies.

ST120/ST120+

Socket Tester

Instructions

Introduction

Before you use the Fluke ST120/ST120+ Socket Tester (the Product), see 

Safety 

Information

.

Safety Information

Warning

 identifies conditions and procedures that are dangerous to the user.

XW

 Warning

To prevent possible electrical shock, fire, or personal injury:
• Read all safety information before you use the Product.
• Do not alter the Product and use only as specified, or the protection supplied 

by the Product can be compromised.

• Do not use the Product if it is altered or damaged.
• Carefully read all instructions.

Summary of Contents for ST120

Page 1: ... Socket Tester the Product see Safety Information Safety Information A Warning identifies conditions and procedures that are dangerous to the user XW Warning To prevent possible electrical shock fire or personal injury Read all safety information before you use the Product Do not alter the Product and use only as specified or the protection supplied by the Product can be compromised Do not use the...

Page 2: ...trician Do not use the Product to indicate the quality of ground Do not use the Product to detect 2 hot wires in circuit Do not use the Product to detect a combination of defects Do not use the Product to indicate reversal of grounded and grounding conductors Consult the GFCI manufacturer s installation instructions to determine that the GFCI is installed in accordance with the manufacturer s spec...

Page 3: ...o not rely on the beeper to indicate the presence of voltage Symbols Table 1 explains the symbols used on the Product and in these instructions Table 1 Symbols Symbol Description W WARNING RISK OF DANGER X WARNING HAZARDOUS VOLTAGE Risk of electric shock Consult user documentation J Earth This product complies with the WEEE Directive marking requirements The affixed label indicates that you must n...

Page 4: ...results unplug all appliances and equipment on the circuit under test 2 Plug the Product into the socket and note which indicators light 3 To determine the wiring see the diagram on the ST120 shown for reference in Figure 1 Figure 1 The Product ...

Page 5: ...go out If the GFCI does not trip or if any of the LEDs on the Product remain on there is a problem with the wiring of the socket the socket itself or the Product Consult an electrician to determine the problem Beeper ST120 only The ST120 includes a switchable beeper that emits a tone when voltage is present on the Product and the beeper is switched on To switch off the beeper slide the beeper swit...

Page 6: ...zed service center to obtain return authorization information then send the product to that Service Center with a description of the problem THIS WARRANTY IS YOUR ONLY REMEDY NO OTHER WARRANTIES SUCH AS FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSED OR IMPLIED FLUKE IS NOT LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES ARISING FROM ANY CAUSE OR THEORY Since some stat...

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