Selecting a multimeter You can find a wide variety of multimeters with different functionalities and accuracy. The V with a straight line means DC voltage.
The secondary part of the CAT category will inform you of how high of voltage it can handle transients in. A multimeter combines three electrical testing tools in one: In the example below, the same circuit of the previous example is used. The multimeter is part of the circuit.
These are especially useful in the HVAC field, as you can take temperature measurements without having to carry an additional device. This post is mostly addressed for beginners who are starting out in electronics and have no idea how to use a multimeter and how it can be useful.
On most circuits the points of contact are easily identifiable by having a black mark or the letter N for a neutral or 0 volts, and a red mark or the letters A or L for the active. In the event anything weird starts happening with your meter, immediately remove the probes, this is easier with touch style probes than alligator clamps, so keep that in mind when deciding which leads to use for the job — though most meters will only come with one set of leads.
Attempting to test it in a circuit attached to a power supply could damage the meter. See the best deals on our number 1 multimeter here.
The basic way that a multimeter functions is by causing the current to flow through the meter to allow for measurements, and usage for reading volts is a rather simple affair. The user interpolates values between the marked numbers to obtain an accuracy that is considered to be within 2.
Testing Continuity With Your Multimeter First check that your multimeter is able to test for continuity, the continuity setting will usually be pair with another setting on your multimeter, most likely the resistance setting and will have a symbol that looks like so.
This allows you to easily detect bugs such as faulty wires. To use this functionality select the mode that look like a speaker.
Many of them can read down to hundredths or even thousandths of a unit, and because their easy to read displays will make the facts of your reading plainly visible to you. The read-out on a digital multimeter appears on an LCD screen. A multimeter allows you to understand what is going on in your circuits.
This category is suitable for most V to V systems. Safety Features You need to keep yourself protected from over-voltage. The COM probe is conventionally black. If you can be sure that your waveforms are pure sine-waves, then an averaging multimeter will be fine to use instead.
In any case, it is extremely important that you read the manual that came with your tool. It combines three essential features: Measuring Resistance with your Multimeter The other primary and often vital function available on virtually any multimeter is the ability to measure resistance.
Multimeters for Different Uses The sensitivity range of a multimeter designates the highest and lowest inputs the meter can read. If the battery is new and fully charged, your meter will read 1. Remember to take all the precautions necessary to proceed, and pretty soon all of this will be second nature.
Turn off the power supply! It also helps you check if two points of the circuit are connected. This example circuit lights up an LED. Analog multimeters are still around, but to a greatly lesser extent than in the past.
Industrial electrician with over 11 years in the industry. A ghost voltage, also called a phantom reading is when a circuit or device is not connected to any power source, yet the multimeter still detects a voltage.
But possibly the greatest drawback of analog multimeters is one of simple functionality, they will only be able to read voltage and ohms in almost all cases. A multimeter is a measurement tool absolutely necessary in electronics. Size and Durability The size and ruggedness of your tool is a prime consideration, especially for those who work in the field.
Generally speaking, this sets the kinds of applications that are appropriate for a specific multimeter. There is a precise balancing factor here, as long as the safety features are in place and you have your desired functions you may wish to go with something a bit cheaper.
For practical applications, CAT categories work as follows: Then, connect the probes to the resistor leads. What is an Autoranging Digital Multimeter?The topic of multimeter safety is a bit too large for a guide as brief as this, but two points should be made about how to use multimeters safely in circuits that are connected to the power grid.
Sticking Multimeter Probes into Wall Sockets. Workshop Manual 2(0) A D, D, D, D Content General Information • Use Multimeter to measure the resist-ance between the cable ends. Nominal value ~ 0 Ω. • If possible, shake the cables and pull on the connectors during test measurements to deter.
Download Fluke Multimeter PDF manuals. User manuals, Fluke Multimeter Operating guides and Service manuals. The Amprobe Multimeter DM7C is a universal, multi-purpose electrical measuring in- strument. It comply with the standards DIN VDE and ENand p r o v id e.
a guide to building circuits and using a multimeter to measure resistance, voltage, and current part a: using the breadboard to build a circuit. Fluke II Industrial Multimeter with IP67 rating. Great savings PLUS Free Shipping when you order today on mi-centre.comDownload