![]() ![]() If the company is unable to provide you with a wiring diagram for your Speco F-70 VOM I'd check with some of their distributors such asĬhristy Industries at 80 in the U.S. The current product line includes an F-72 20K Ohm/Volt VOM Multimeter (shown at above-left) similar to your older F-70. Contact your installe for questions regarding your Speco products." Unfortunately the company's technical support and contact information ". Speco Technologies, 200 New Highway, Amityville NY 11701 Tel:Ĭurrently, in addition to a range of analog VOM Multimeters, Speco produces a wide range of products besides your Speco analog VOM, including digital video recorders, secuity cameras, wireless microphones. Weldon, you can contact Speco Technologies at: Where may I find wiring diagram for Speco F-70 analog VOM meter. Reader Question: Speco F-70 analog VOM meter See DMM DIGITAL MULTIMETER HOW TO USE for a separate discussion of digital multimeters and VOMs. Simpson produces a wide range of test instruments including analog VOMs that can be used to measure resistance (ohms), direct current, alternating current, and even decibels. This little VOM, ca 1985, is about 1/8 the size of the Simpson 260, ca 1958, described just below. On contacting Jensen Corporation, the company kindly sent us a few spare fuses. In analog VOMs such as this unit there is typically a very low-amperage fuse whose function is to protect the meter movement from damage. In 30 years of use we needed one repair of this instrument - an internal fuse which we couldn't find locally. Here our photo shows the Jensen analog VOM with its probes attached but not connected to anything. An example of a digital multimeter is shown just belowk the display window of a Sperry DSA-500.Īt DMM DIGITAL MULTIMETER HOW TO USE we explain the function and level settings and probe connections needed when using a VOM or DMM to measure voltage (as well as when measuring current or resistance).Ī VOM or volt-ohm meter may also be found in an analog form such as our favorite and now a collectors-item little Jensen VOM that we've used for nearly 30 years. The display on a digital multimeter is just that - digital, using an electronically-generated number corresponding to the range at which the DMM is set. A digital multimeter (DMM) is a multi-purpose electrical test instrument that can measure AC or DC voltage, resistance (ohms), current (amps) and often other conditions such as sound level (decibels) or temperature by using additional sensors or probes. What's the difference between a digital multimeter (DMM) and an analog VOM or volt-ohm meter? We described VOMs just above. S/he should never insert any instrument or tool into electrical equipment. ![]() Watch out: If the VOM user is not trained in safe use of this equipment Below is a Simpson analog VOM that has been in use since 1958. ![]() That meter includes a clamp-on ammeter for measuring current. You can see an example of a analog display in the VOM shown at above left. The display on an analog VOM uses a needle or pointer that rotates over display values in an arc. Some VOMs can also measure sound levels (decibels) or other metrics using an appropriate attachment. VOMs: analog type Volt-Ohm MetersĪn analog volt-ohm meter or VOM is a multi-purpose electrical test instrument that can measure AC or DC voltage, resistance (ohms), and depending on the model current (amps). We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. This article describes analog or needle and dial type VOMS, volt-ohm meters used to detect or measure voltage, resistance and values. We have no relationship with advertisers, products, or services discussed at this website. ![]() InspectAPedia tolerates no conflicts of interest. ![]()
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