Extech Instruments CB10 User manual

User Guide
Circuit Breaker Finder and GFCI
Receptacle Tester
Extech CB10
Introduction
Congratulations on your purchase of the Extech Model
CB10 Circuit Breaker Finder and Receptacle Tester. This
instrument is shipped fully tested and calibrated and, with
proper use, will provide years of reliable service.
Meter Description
Receiver
1. Indicating LED and Beeper
2. ON/OFF and Sensitivity adjust
3. Transmitter storage plug
Note that battery compartment is located on
rear of receiver
Transmitter
4. Receptacle LED coding scheme
5. GFCI test button
6. Receptacle LED’s
Safety
This symbol adjacent to another symbol,
terminal or operating device indicates that
the operator must refer to an explanation in
the Operating Instructions to avoid personal
injury or damage to the meter.
This WARNING symbol indicates a
potentially hazardous situation, which if not
avoided, could result in death or serious
injury.
This CAUTION symbol indicates a
potentially hazardous situation, which if not
avoided, may result damage to the product.
This symbol indicates that a device is
protected throughout by double insulation or
reinforced insulation.
Specifications
Operating Voltage 90 to 120V
Operating Frequency 47 to 63Hz
Power supply 9V battery (receiver)
Operating Temperature 41ºF to 104ºF (5ºC to 40ºC)
Storage Temperature -4oF to 140oF (-20oC to 60oC)
Operating Humidity Max 80% up to 87ºF (31ºC)
decreasing linearly to 50% at
104ºF (40ºC)
Storage Humidity <80%
Operating Altitude 7000ft. (2000meters) maximum.
Weight 5.9oz (167g)
Dimensions 8.5” x 2.2” x 1.5” (215 x 56 x
38mm)
Approvals UL CE
UL Listed The UL mark does not indicate that
this product has been evaluated
for the accuracy of its readings.
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 to 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
[phone] ext. 210 for authorization or visit our website
www.extech.com for contact information. 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.
CAUTION
WARNING
6
5
4
1
2
3

CB10 V2.0 08/06
2

Support line [phone]
Technical support: Extension 200; E-mail: [email protected]
Repair & Returns: Extension 210; E-mail: [e-mail]
Product specifications subject to change without notice
For the latest version of this User Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Road, Waltham, MA 02451
CORRECT WIRING
GFCI TESTING IN PROGRESS
HOT ON NEUTRAL WITH HOT OPEN
HOT AND GROUND REVERSED
HOT AND NEUTRAL REVERSED
OPEN HOT
OPEN NEUTRAL
OPEN GROUND
OFF ON
Operation
WARNING: Always test on a known good circuit before
use.
WARNING: Refer all indicated problems to a qualified
electrician.
Locating a Circuit Breaker or Fuse
The transmitter injects a signal onto the circuit which can be
detected by the receiver. The receiver will beep when the
signal is detected. The sensitivity adjustment allows for tracing
and pinpointing the exact circuit breaker or fuse protecting the
selected circuit.
1. Plug the Transmitter / Receptacle Tester into a powered
outlet. The two green LED’s should illuminate.
2. Rotate the Receiver’s Sensitivity adjustment from the
OFF position to the HI position. The red LED should turn
on. If the LED does not turn on, replace the battery.
3. Test the operation of the Receiver by placing it in close
proximity to the transmitter. The receiver should beep
and the LED should flash.
4. At the breaker panel, set the sensitivity to the HI position
and hold the receiver as indicated by the “UP – DOWN”
label.
5. Move the receiver along the row of breakers until the
selected circuit is identified by the beep and flashing
light.
6. Reduce the sensitivity as needed to pinpoint the exact
circuit breaker controlling the circuit.
Receptacle Wiring Test
1. Plug the Transmitter / Receptacle tester into the outlet.
2. The three LED’s will indicate circuit condition. The
diagram lists all of the conditions that the CB10 can
detect. The LED’s in this diagram represent the view
from the GFCI button side of the transmitter. When
viewing the other side of the transmitter the LED’s will be
a mirror image of those shown here.
3. The tester will not indicate the quality of the ground
connection, 2 hot wires in a circuit, a combination of
defects, or reversal of ground and neutral conductors.
Receptacle GFCI Test
1. Before using the tester, press the TEST button on the
installed GFCI receptacle, the GFCI should trip. If it does
not trip, do not use the circuit and call a qualified
electrician. If it does trip, press the RESET button on the
receptacle.
2. Plug the Transmitter / Receptacle tester into the outlet.
Verify that the wiring is correct as described above.
3. Press and hold the test button on the tester for at least 8
seconds, the indicator lights on the tester will shut off
when the GFCI trips.
4. If the circuit does not trip, either the GFCI is operable but
the wiring is incorrect, or the wiring is correct and the
GFCI is inoperable.
Replacing the Battery
1. When the battery drops below the operating voltage the
receiver’s LED will not light. The battery should be
replaced
2. Remove receiver battery cover by removing the screw
using a Philips head screwdriver. (The Transmitter is line
powered.)
3. Install 9 volt battery observing the correct polarity.
4. Re-install battery cover
5. Dispose of the old battery properly.
Copyright ©2006 Extech Instruments Corporation.
All rights reserved including the right of reproduction in whole or
in part in any form.