Meters are essential testing equipment for electricity. Therefore, we should use and maintain them properly in order to use them with the same efficiency that we used when we bought them from the store. Though there are nominal wear and tear that every other device is subject to, keeping meters and testing equipment perfect for a long time has its perks and its ways too.
It is necessary to keep test equipment in proper working condition because we don’t know when they will come in handy. Just like a proper set-up, adjustment, and operation of the instruments are essential, the maintenance of the equipment also forms an integral part of the story of a properly functioning equipment.
Many of us might be using a couple of meters and other testing equipment but don’t know why and how most other equipment is used and should be managed. So, here we decided to lay down the instructions for using such instruments and also introduce much other equipment that you should know.
Here we will first look at some common test equipment and how they are used.
Checking out some of the common test pieces of equipment and how they are used
By the name, we can understand that this particular device is used for measuring the voltage of what we term as the potential difference between two points in an electrical circuit. You can connect this instrument in parallel with the circuit that you are measuring. The range of teh voltages varies from some tenths volt to a thousand volts. Measurements of both A.C. and D.C. voltage can be done with the help of a voltmeter.
If you want to measure the electrical D.C. ohm resistance of a circuit, circuit part, or component, Ohmmeters are the best devices to do so. Also, these devices can be calibrated from zero ohms to infinite used to determine series as well as parallel resistance.
With the help of ammeters, you can measure the magnitude of electrical current flow in an electrical circuit. Some of these instruments must be inserted in series with the circuit while messing D.C current.
HIGH POTENTIAL TESTER (HI-POT)
These devices can generate calibrated voltages from zero to several thousand to test the integrity of the insulation on wiring, which is usually buried in the earth.
GROUND ROD TESTER
With the help of ground rod testers, we can test the effectiveness of the resistance of the grounding electrode (rod) circuit in an electrical system and also determine the value of it.
If you haven’t already used these, then chart recorders are electrically driven devices that you can use as roll chart indicators. They help you have a graphic readout of parameters versus time. You can get units for recording voltages, currents, pressures, temperatures, light levels, etc. It is important to note here that some of these instruments are single-channel while others can measure multiple inputs. They are distinguished as indispensable instruments for monitoring a parameter over a period of time.
What are the precautions you need to keep in mind while using these instruments?
You must take care of while you are using these kinds of electrical instruments. This is recommended not only to keep the instrument in working order or test the circuitry properly but also to ensure proper safety while working.
Here are some general ground rules to manage meters and test types of equipment well:
- It is better to start by keeping the range switch at a value higher than what you expect to measure at the start of the process. Not doing so might also damage the instrument temporarily and in some cases, permanently as well.
- Next, you need to make sure that the multi-tester you are using is set in the right mode. If your mode set reads “AMPS”, then you shouldn’t begin the process because that might lead to the destruction of the meter and might also harm the operator.
- It is observed that many meters are destroyed while trying to measure voltage if the meter is set to measure resistance.
- If you can test voltages as well as to measure resistance in order to find a fault in a circuit with dangerous voltages on it, then it is always safe and recommended to switch the power off and go for the latter.
With these instructions handy you can definitely keep your work environment safe and continue working with your pieces of equipment without any worries.