Model CA310 Version 1.1 06/03

Support Hotline (781) 890-7440

Tech support: Ext. 200; Email: support@extech.com

Repair/Returns: Ext. 210; Email: repair@extech.com

Website: www.extech.com

Read mV

Set to AC V

Voltage input

AC Current Measurements

1.

Set the DMM to the AC mV range or to a low AC voltage range.

2.

Connect the RED test lead to the DMM '+' Voltage terminal and the BLACK lead to

the '-' COM terminal.

3.

Press the Jaw Trigger to open the jaw and clamp around a single conductor.

Incorrect

Correct

4.

Read the voltage on the DMM display and then divide this reading by 10 to get the

current reading in Amps (10mV AC per 1A of AC current).

Refer to the TABLE below for examples of interpreting the DMM display:

Note: Do not apply voltage to the clamp adaptor’s test leads

Note: For small currents, use the RELATIVE function (if available) on the DMM with no

wire clamped to zero the meter and improve accuracy.

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 on 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 (781) 890-7440 ext. 210 for authorization or visit

our website at www.extech.com (click on ‘Contact Extech’ and go to ‘Service Department’ to request an

RA number). 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.

Copyright © 2003 Extech Instruments Corporation.

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

Interpreting the DMM display

DMM AC Range

Current

DMM Display

Display ÷ 10 = A

V range

300A

03.00 V

0.300

mV range

199A

1990 mV

199

mV range

20A

200.0 mV

20

mV range

2A

20.00 mV

2