Model # DMM40

Internet #204379853

General Tools Manual Ranging CAT III 600-Volt Digital Multi-Meter with Backlight
0681035501221

Discontinued General Tools

Manual Ranging CAT III 600-Volt Digital Multi-Meter with Backlight

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Product Overview

Since 1910, General Tools has grown to become the recognized industry leader for specialty hand tools and instruments. This Digital Multi-Meter is easy to use and it measures AC-Voltage, AC/DC current, resistance, continuity, and diode integrity. The large backlit screen allows for use in low-light areas where visibility is poor.

California residents: see   Proposition 65 information

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.

Specifications

Dimensions

Product Depth (in.)
1.3
Product Height (in.)
5.5
Product Width (in.)
3.4

Details

Returnable
90-Day
Tools Product Type
Hand Tool

Warranty / Certifications

Manufacturer Warranty
1 Year

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Customer Questions & Answers

I need to test thermocouples so does this tester test millivolts. Basically how low does it go in...

I need to test thermocouples so does this tester test millivolts. Basically how low does it go in terms of millivolts?Bill Which setting?
Asked by: Bill
The lowest scale is 0 to 200mv so it will easily test thermocouples.
Answered by: Cutworm
Date published: 2016-11-17
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Customer Reviews

Manual Ranging CAT III 600-Volt Digital Multi-Meter with Backlight is rated 4.6 out of 5 by 9.
Rated 5 out of 5 by from Impressive Multi-Meter This meter is all you need for the DIY'r or workshop. It has great resolution for a meter in this price range - .1 volt on the 120v range and .01 on the 12 volt range. It has a nice sturdy case that is padded on the sides for drop protection and nice well made test leads that are normally found on more expensive meters. It measures AC and DC volts, resistance and DC current as well as an audible continuity checker by using the diode tester. The back-lite screen is really nice when working in areas with low light as can be seen in the video. The only improvement to the meter would be a little longer set of test leads - just a personal preference. This is a great meter for the price and will take care of all your needs around the house or workshop.
Date published: 2013-10-28
Rated 4 out of 5 by from Easy to Use, Good for Price Very easy to use. The provided instructions gives enough information for someone without an electrical background to get a basic understanding of the symbols used on the device. If you don't know the basics (AC vs DC) resistance, etc, read the booklet. The device itself performed exactly as expected in my tests. I tried an array of standard and rechargeable batteries in addition to an few electrical outlets. It isn't the cheapest on out there, but the back lit screen does set it apart in the lower end devices. The yellow body of the device also makes it easy to read the dial in dim light situations. Pro's should consider a higher end device, but for the DYI or handyman, this should be sufficient.
Date published: 2013-10-27
Rated 4 out of 5 by from Money Well Spent !!! This meter is all you need for the DIY'er or shop. It comes built into a sturdy hard casing that should take years of abuse. Large buttons, dial and display that I can read without my glasses, . It measures AC and DC volts, resistance and DC current as well as an audible continuity checker by using the diode tester which can help you check for complete circuits. It is also backlit making it extremely easy to read in difficult lighting situations. It comes with an easy to read set of instructions that will give most DIY’ers a good understanding of how to use it and properly interpret the results. This is a great beginner meter for home enthusiasts as well as being very useful for the seasoned pro. It will be money well spent and looks as it will give you years of trouble free service.
Date published: 2013-12-06
Rated 5 out of 5 by from Very good value This unit is strong and durable. It feels good in the hand and the back light is strong enough to read the figures in dark working areas. I compared this multimeter with my friends very expensive one and found to my surprise that all the measurements were the same as his no matter what setting I used. He was surprised too in that his cost 5 times as much and expected at least a slight variation on the results of the tests. But they were all exactly the same.The battery too was easy to fit and tiny holding screws that hold the cover were good to remove and very easy to locate and screw back once the battery was secure. Good dials and easy to read and understand. I am impressed with this multimeter and even more so yesterday when checking behind the electrical consumer unit, my hand slipped creating a rather large spark on one of the multimeter leads. Expecting some damage at least to the meter, I rechecked it against my friends and again the reading were in perfect sync.
Date published: 2013-10-25
Rated 5 out of 5 by from Multi meter multi use This product is useful for battery checks as I use it around my greenhouse electronics and hand tool battery's and check regular battery's and it is accurate I recommend this for every day use round the shop or home It runs on 9 volt screw in back works well in Moist but not wet and cold weather
Date published: 2013-12-09
Rated 5 out of 5 by from Execellent Meter for the money The Digital Multimeter is a practical tool for electrician use . It is easy to operate and the readings indicated directly on the screen. It can be use to overhaul all kinds of circuit boards. It is also an ideal teaching instrument for students
Date published: 2013-12-17
Rated 5 out of 5 by from I have tried this product and it seems to work fine. It was at a reasonable price and i needed something to check my outlets.
Date published: 2014-01-30
Rated 5 out of 5 by from excellent meter This meter is an excellent meter for the price. It will do everything, all kinds of electrical testing and has already paid for itself in repairs that I have been able to make!!
Date published: 2015-08-11
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