How To Use A Millimeter

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What Is A Millimeter ?

A millimeter is a nifty multi-functional that measures a wide variety of electric current, resistance and voltage. It’s christened millimeter as it bundles multiple functions as an ohmmeter, ammeter and voltmeter. Other models also provide other functions like diode or continuity tests. Continuity check signals connectivity in a circuit or connected wires with a shrill beep and also prevents short circuits. The diode function ensures a one-way flow of electricity but the feature varies from one model to another. Top-of-the-line multimeters provide advanced functions like identifying electrical components such as capacitors and transistors. However, due to the variances among different millimeters, one should pore over the accompanying manual guide to understand the features better.

Input Jacks and Range

The black lead should be plugged up to the common terminal. Plug the red lead into the 10A Jack for currents exceeding 300mA, the 300mA Jack for currents below 300mA, and the left behind jack V-ohms-diode for any other measurement. When activated, the meter will switch to auto-range. To select the manual ranges A DC, V AC, A AC, and V DC, hit the intelligent button located in at the heart of the rotary dial. When choosing the range manually, always go for value roughly above the value you want to estimate. To oscillate back to auto-range, click the button again once.

Auto-Touch Hold Mode

The Auto-Touch Hold mode calculates and shows steady readings. Enter the button at the middle of the rotary dial for about 2 seconds if you want to turn the meter on. When the meter detects new input, it buzzes and new statistical data is manifested. To physically extract fresh measurements, input the middle button. To deactivate the Auto-Touch Hold model, switch the device off. Users should be circumspect of stray voltages in new readings. The Touch Hold Mode should not be used with high voltage circuits as it can lead to electric shock.

Salient Terms

Most meters will measure AC and DC voltage, that’s the alternating current though some meters might have a V or A preceding AC and DC- DCA, DCV, VAC, ACA or VDC. The multimeter features red and black wires known as leads (banana jack and pin jack) or probes. The tails of the lead that injects into the multimeter, but some versions have “pin jacks”. The other end is used to measure circuits. Although most meters have the two probes, confusion arises where there are more than two points to plug in. Follow the manual guide to determine whether you want to determine voltage, continuity test, resistance or current. Most multimeter come with a fuse to contain heavy current. Fuses blow out if they’ve excess current flowing, this also halts the stream of electricity and safeguards against damage to other parts of the meter. For meters with several fuses, the probe’s point of plugging will be based on whether you measure high or low electric current. The current, resistance, and voltage are represented by amps (A), ohms (Ω) and volts (v).