EXTECH ET40 User Guide

Operation Sheet

Heavy Duty Continuity Tester

Model ET40

Features:

Ideal for checking continuity of non-energized components, fuses, switches, relays, wiring
and circuit boards

Features 30" (76cm) Test lead with alligator clip

Continuity Testing

WARNING: To avoid electric shock, never measure continuity on circuits or wires that

have voltage on them.

1. Install one AAA battery.

2. Remove all power from the circuit to be tested.

3. Remove the plastic probe tip.

4. Touch the probe tip to one side of the device and the alligator clip to the other side

5. The bulb will light if there is continuity.

CAUTION: Use extreme caution when checking electrical circuits to avoid injury due
to electrical shocks. Extech Instruments assumes basic knowledge of electricity on
the part of the user and is not responsible for any injury or damage due to improper
use of theis tester.

All rights reserved including the right of reproduction in whole or in part in any form.

Copyright © 2012 Extech Instruments Corporation (a FLIR company)

www.extech.com

ET40-EN-V1.0 03/12