ST120+ - Measurement FLUKE - Free user manual and instructions

Product Type	Non-Contact Voltage Tester
Brand	Fluke
Model	ST120+
Voltage Detection Range	12 V to 1000 V AC
Frequency Range	50/60 Hz
Continuity Test	Yes, with audible beep
Display	LED indicator (green/red)
Power Supply	2 x AAA batteries (1.5 V)
Battery Life	Approximately 300 hours
Dimensions	155 x 30 x 25 mm
Weight	60 g (with batteries)
Safety Rating	CAT IV 1000 V
IP Rating	IP54 (dust and splash resistant)
Operating Temperature	-10 °C to 50 °C
Storage Temperature	-20 °C to 60 °C
Certifications	CE, CSA, UL
Warranty	2 years
Cleaning Instructions	Wipe with a damp cloth; do not use solvents
Spare Parts	Not applicable (sealed unit)
Repairability	Not user-serviceable; contact Fluke service center

Frequently Asked Questions - ST120+ FLUKE

How does the Fluke ST120+ detect voltage?

The ST120+ uses a non-contact voltage detection method. Simply bring the probe tip near a conductor or outlet; the LED will light red and the unit will beep if voltage is present.

What is the maximum voltage the ST120+ can detect?

The ST120+ can detect AC voltages from 12 V to 1000 V. It is rated for CAT IV 1000 V environments.

How do I test continuity with the ST120+?

To test continuity, touch the probe tip to the circuit. If continuity exists (resistance below a threshold), the LED will turn green and a continuous beep will sound.

What type of batteries does the ST120+ use?

The tester uses 2 AAA batteries (1.5 V each). To replace, slide off the battery cover on the back and insert new batteries with correct polarity.

How do I know when the battery is low?

The unit will blink the green LED and emit intermittent beeps when the battery voltage is low. Replace batteries promptly.

Is the ST120+ safe to use on live circuits?

Yes, the ST120+ is designed for safe use on live circuits. It has a CAT IV 1000 V safety rating and double insulation. However, always follow standard safety precautions.

Can the ST120+ detect voltage through insulation?

Yes, it can detect voltage through most types of insulation, including plastic wire insulation and outlet covers, as long as the probe tip is close to the conductor.

What does a red LED mean?

A solid red LED indicates that voltage is detected. The brighter the red, the stronger the signal. If the LED remains off, no voltage is detected.

How do I clean the ST120+?

Clean the exterior with a damp cloth and mild soap. Do not use abrasive cleaners or solvents. Ensure the unit is powered off and dry before use.

What is the warranty period for the ST120+?

Fluke offers a 2-year limited warranty against defects in materials and workmanship. Keep your proof of purchase for warranty claims.

USER MANUAL ST120+ FLUKE

ST120/ST120+/ST240/ST240+

Socket Tester Instructions

Introduction

Before you use the Fluke ST120/ST120+/ST240/ST240+ Socket Tester (the Product), see Safety Information.

Safety Information

Make sure to read the Safety Information that is enclosed on the Product packaging.

Symbols

Table 1 explains the symbols used on the Product and in these instructions.

Table 1. Symbols

Symbol Description
	WARNING. RISK OF DANGER.
	WARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
	Consult user documentation.
	Earth
	This product complies with the WEEE Directive marking requirements. The affixed label indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this product as unsorted municipal waste.

Product Use

To use the Product:

1. For best 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 Product shown for reference in Figure 1.

Figure 1.

GFCI/RCD Test

To test a GFCI or RCD:

1. Before you plug the Product into a GFCI or RCD socket, push the GFCI/RCD test button, if applicable, to trip the GFCI or RCD socket. If the GFCI or RCD does not trip, the socket is faulty and should be replaced.
2. After the GFCI/RCD trips, push the RESET button on the socket.
3. Plug in the Product and push the blue GFCI/RCD test button on the Product for a minimum of 6 seconds. As you push the Product button, but before the GFCI/RCD trips, the LED to the left of the Product button briefly turns on. Once the GFCI/RCD trips, all of the LEDs on the Product go out. If the GFCI/RCD 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+ and ST240+)

The ST120+ and ST240+ include 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 switch to the left position. Contact Fluke

Fluke Corporation operates worldwide. For local contact information, go to our website: www.fluke.com

To register your product, view, print, or download the latest manual or manual supplement, go to our website.

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LIMITED WARRANTY AND LIMITATION OF LIABILITY

This Fluke product will be free from defects in material and workmanship for two years from the date of purchase. This warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty on Fluke's behalf. To obtain service during the warranty period, contact your nearest Fluke authorized 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 states or countries do not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages, this limitation of liability may not apply to you.

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Fluke Corporation

P.O. Box 9090

Everett, WA 98206-9090

U.S.A

PO Box 1186

5602 BD Eindhoven,

The Netherlands

PN 5311597

September 2020, Rev. 1, 8/21

©2020-2021 Fluke Corporation. All rights reserved.

Specifications are subject to change without notification. All product names are trademarks of their respective companies.