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LIMITED WARRANTY STATEMENT

Jefferson Professional Tools & Equipment ®, or hereafter "Jefferson" warrants its customers 
that its products will be free of defects in workmanship or material. Jefferson shall, upon 
suitable notification, correct any defects, by repair or replacement, of any parts or components 
of this product that are determined by Jefferson to be faulty or defective. This warranty is void 
if the equipment has been subjected to improper installation, storage, alteration, abnormal 
operations, improper care, service or repair. 

Warranty Period

Jefferson will assume both the parts and labour expense of correcting defects during the 
stated warranty periods below. All warranty periods start from the date of purchase from an 
authorised Jefferson dealer. If proof of purchase is unavailable from the end user, then the date 
of purchase will be deemed to be 3 months after the initial sale to the distributor.  

1 Year

 

• JEFDMM300V - 300V DIGITAL MULTIMETER 

90 Days 

•  All replacement parts purchased outside of the warranty period 

Important:

 All parts used in the repair or replacement of warranty covered equipment will be 

subject to a minimum of 90 days cover or the remaining duration of the warranty period from 
the original date of purchase.    

Warranty Registration / Activation

You can register and activate your warranty by visiting the Jefferson Tools website using the 
following address:  www.jeffersontools.com/warranty and completing the online form.  Online 
warranty registration is recommended as it eliminates the need to provide proof of purchase 
should a warranty claim be necessary. 

Warranty Repair

 

Should Jefferson confirm the existence of any defect covered by this warranty the defect will 
be corrected by repair or replacement at an authorized Jefferson dealer or repair centre. 

Packaging & Freight Costs

 

The customer is responsible for the packaging of the equipment and making it ready for 
collection. Jefferson will arrange collection and transportation of any equipment returned under 
warranty. Upon inspection of the equipment, if no defect can be found or the equipment is not 
covered under the terms of the Jefferson warranty, the customer will be liable for any labour 
and return transportation costs incurred. These costs will be agreed with the customer before 
the machine is returned.   

NOTE: 

* Jefferson reserve the right to void any warranty for damages identified as being 

caused through misuse *    

Warranty Limitations

Jefferson will not accept responsibility or liability for repairs made by unauthorised technicians 
or engineers. Jefferson's liability under this warranty will not exceed the cost of correcting the 
defect of the Jefferson products. Jefferson will not be liable for incidental or consequential 
damages (such as loss of business or hire of substitute equipment etc.) caused by the defect 
or the time involved to correct the defect. This written warranty is the only express warranty 
provided by Jefferson with respect to its products.  Any warranties of merchantability are 
limited to the duration of this limited warranty for the equipment involved.  

Claiming Warranty Coverage 

The end user must contact Jefferson Professional Tools & Equipment:  
(Tel: 

+44 (0) 1244 646 048

) or their nearest authorised Jefferson dealer where final 

determination of the warranty coverage can be ascertained. 

 
Step 1 - Reporting the Defect 

Online Method:

Visit our website www.jeffersontools.com/warranty and complete the Warranty Returns form. 
You can complete the form online and submit it to us directly or download the form to print out 
and return by post.

Telephone Method: 

Contact your Jefferson dealer or sales representative with the following information:

• 

Model number 

• 

Serial number (usually located on the specification plate) 

• 

Date of purchase 

A Warranty Returns form will be sent to you for completion and return by post or fax, together 
with details of your nearest authorised Jefferson repair centre. On receipt of this form Jefferson 
will arrange to collect the equipment from you at the earliest convenience.  

Step 2 - Returning the Equipment   

It is the customer’s responsibility to ensure that the equipment is appropriately and securely 
packaged for collection, together with a copy of the original proof of purchase. Please note 
that Jefferson cannot assume any responsibility for any damage incurred to equipment during 
transit. Any claims against a third party courier will be dealt with under the terms & conditions 
of their road haulage association directives.   

NOTE:

  Jefferson will be unable to collect or process any warranty requests without a copy of 

the original proof of purchase. 

Step 3 - Assessment and Repair    

On receipt, the equipment will be assessed by an authorised Jefferson engineer and it will 
be determined if the equipment is defective and in need of repair and any repairs needed are 
covered by the warranty policy. In order to qualify for warranty cover all equipment presented 
must have been used, serviced and maintained as instructed in the user manual. Where repair 
is not covered by the warranty a quotation for repair, labour costs and return delivery will be 
sent to the customer (normally within 7 working days). 

Note:

 If the repair quotation is not accepted Jefferson Professional Tools & Equipment will 

invoice 1 hour labour time at £30 per hour plus return carriage costs (plus VAT). In cases 
where no fault can be found with the equipment, or, if incorrect operation of the equipment 
is identified as the cause of the problem, a minimum of 1 hour labour at £30 per hour plus 
carriage costs will be required before the equipment will be despatched back to the customer. 

Any equipment repaired or replaced under warranty will normally be ready for shipment back to 
the customer within 7 working days upon receipt of the equipment at an authorised Jefferson 
Repair centre (subject to part availability). Where parts are not immediately available Jefferson 
will contact you with a revised date for completion of the repair.  

General Warranty Enquiries 

For any further information relating to Jefferson warranty cover please call: 

 +44 (0) 1244 646 048 

or send your enquiry via email to [email protected]

Disclaimer: 

The information in this document is to the best of our knowledge true and accurate, but all 
recommendations or suggestions are made without guarantee. Since the conditions of use 
are beyond their control, Jefferson Professional Tools & Equipment ®  disclaim any liability for 
loss or damage suffered from the use of this data or suggestions. Furthermore, no liability is 
accepted if use of any product in accordance with this data or suggestions infringes any patent. 
Jefferson Professional Tools & Equipment ® reserve the right to change product specifications 
and warranty statements without further notification. All images are for illustration purposes 
only.

DECLARATION OF CONFORMITY

 
We, Jefferson Professional Tools & Equipment, as the authorised European Community 
representative of the manufacturer, declare that this equipment conforms to the requirements of 
the following standards: 

IEC 61010 - 

Safety Requirements for Electrical Equipment for Measurement, Control, and      

                        Laboratory Use

Signed by: 

Stephen McIntyre (Operations Director) 

  

 

Date:

 13.01.20

www.jeffersontools.com

JEFDMM300V

300V

 DIGITAL MULTIMETER

USER GUIDE

v.1.1

MAINTENANCE & STORAGE

Note: 

Apart from replacing the fuse and battery, never attempt to service or repair this 

equipment yourself. Contact Jefferson Tools for information and advice if a fault is detected. 

NOTE: Ensure the equipment is turned off and that the test leads are disconnected before 
carrying out any cleaning or maintenance on this multimeter.
 
• 

Periodically wipe the case with a slightly damp cloth a small quantity mild detergent. Do not 

use abrasives or solvents to clean. 

• 

Keep the buttons / terminals clean (carefully) using a cleaning swab dipped in alcohol as 

required.

•  

Store the multimeter in a dry environment, away from devices emitting magnetic fields, when 

not in use. 

BATTERY AND FUSE REPLACEMENT

Replacing the Battery:

Change the battery immediately with a like-for-like replacement (1x 9V) as required when the 
low-battery indicator is displayed. 

Do not use the meter when the indicator is displayed. 

To replace the battery remove the screw on the battery cover, remove the old battery and insert 
the replacement. Replace the battery cover and screw to secure. 

Replacing the Fuses:

The fuses supplied with this equipment should rarely need to be replaced and any requirement 
to replace them will usually be the result of misuse of the multimeter. To replace the fuse, 
remove the screws on the backcover, remove the faulty fuse and replace with a similar size and 
rated fuse. Reinstall the backcover and secure with the screws. This meter is supplied with two  
Ø5 x 20mm fuses:  

F1 Fuse:

 250mA / 300V, Fast action

 F2: Fuse:

 10A / 300V, Fast action

Please note that the warranty for this item covers manufacturing defects. 
The warranty does not cover overloading, normal wear and tear and 
abuse. The warranty will become invalid if the casing is opened or 
tampered with in any way.

Information on Disposal for Users of Waste Electrical & Electronic Equipment 
(WEEE)]

This symbol on the product(s) and / or accompanying documents means 
that used electrical and electronic products should not be mixed with 
general household waste.  

For proper treatment, recovery and recycling, please take this product(s) 
to designated collection points where it will be accepted free of charge.

Jefferson Tools, Herons Way, Chester Business Park, Chester, United Kingdom, CH4 9QR, 

Tel.

 +44 (0)1244 646 048, 

Email: 

[email protected] 

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