SMT, PCB Electronics Industry News

Measuring Instrument & Tester

May 31, 2021

Insulation Tester

Testing insulation resistance is essential to keeping wires and motors working properly. It provides a quick and easy way to determine the condition of the insulation on the wire, generators, and motor windings. An insulation tester measures very high resistance values by sending a high voltage signal into the object being tested. It often does more functions other than the basic measuring function, including more complex testing and recording of the measurements. Insulation testers can measure voltage and current, perform more complex tests, such as compensating for ambient environmental conditions like humidity and temperature during a test to provide information about how motors perform in changing conditions.


Insulation Tester is available through Quick Time Engineering Inc.


Process Meter

Process Meters are high precision instruments designed to measure, display, alarm and control a wide range of process variables such as 4 to 20 mA and 0 to 10 V analog inputs. Some model is a clamp-on variation where the device allows the user to make a safe current check of 4 to 20mA without breaking the loop.


Process Meter is available through Quick Time Engineering Inc.


Stroboscope

A stroboscope is an instrument that emits a series of brief, intense flashing lights at specific intervals. When the flashing light from a stroboscope is directed onto an object rotating at high speed (e.g., a standing fan), the moving fan appears to stand still. The stroboscope makes the fan rotating at high speed appear to a standstill due to the visual persistence of the human eye.

When the frequency of the flashing lights from the stroboscope is adjusted to synchronize with the fan rotating speed, the number of apparently stationary fan blades saw corresponds to the actual number of fan blades.

The retina of the human eye retains an image for approximately 1/16th of a second. The stroboscope relies on this characteristic of the human eye to provide its intended function. Projectors used in movie theatres also rely on characteristics of human vision to display motion pictures.

If the stroboscope emits a series of flashing lights at a frequency faster than the fan rotating speed, you will see more fan blades than there actually are. In contrast, if the frequency of the flashing lights is slower than the fan rotating speed by a fraction of a whole number, you will see the actual number of fan blades. 


Stroboscope is available through Quick Time Engineering Inc.


Multimeter

Multimeter, also known as volt-ohm meter, a handheld tester used to measure electrical voltage, current (amperage), resistance, and other values. Multimeters come in analog and digital versions and are useful for everything from simple tests, like measuring battery voltage, to detecting faults and complex diagnostics. It is the tools for troubleshooting electrical problems on motors, appliances, circuits, power supplies, and wiring systems.

An analog multimeter is based on a microammeter (a device that measures amperage, or current) and has a needle that moves over a graduated scale. Analog multimeters are less expensive than their digital counterparts but can be difficult for some users to read accurately. Also, they must be handled carefully and can be damaged if they are dropped.

Analog multimeters typically are not as accurate as digital meters when used as a voltmeter. However, analog multimeters are great for detecting slow voltage changes because you can watch the needle moving over the scale. Analog testers are exceptional when set as ammeters, due to their low resistance and high sensitivity, with scales down to 50µA (50 microamperes).

Digital multimeters are the most commonly available type and include simple versions as well as advanced designs for electronics engineers. In place of the moving needle and scale found on analog meters, digital meters provide readings on an LCD screen. They tend to cost more than analog multimeters, but the price difference is minimal among basic versions. Advanced testers are much more expensive.

Digital multimeters typically are better than analog in the voltmeter function, due to the higher resistance of digital. But for most users, the primary advantage of digital testers is the easy-to-read and highly accurate digital readout.


Multimeter is available through Quick Time Engineering Inc.


Thermometer

A thermometer is an instrument that measures temperature. It can measure the temperature of a solid such as food, a liquid such as water or a gas such as air. The three most common units of measurement for temperature are Celsius, Fahrenheit, and kelvin.

The Celsius scale is part of the metric system. The metric system of measurement also includes units of mass, such as kilograms, and units of length, such as kilometers. The metric system, including Celsius, is the official system of measurement for almost all countries in the world. Most scientific fields measure temperature using the Celsius scale. Zero degrees Celsius is the freezing point of water, and 100 degrees Celsius is the boiling point of water.

Three nations do not use the Celsius scale. The United States, Burma, and Liberia use the Fahrenheit scale to measure temperature. However, even in these countries, scientists use the Celsius or Kelvin scale to measure temperature. Water freezes at 32 degrees Fahrenheit and boils at 212 degrees Fahrenheit.

The Kelvin scale is used by physicists and other scientists who need to record very precise temperatures. The Kelvin scale is the only unit of measurement to include the temperature for "absolute zero," the total absence of any heat energy. This makes the Kelvin scale essential to scientists who calculate the temperature of objects in the cold reaches of outer space. Water freezes at 273 kelvins and boils at 373 kelvins. We do not read outdoor temperatures in the kelvin scale because it uses such large numbers—a 75-degree Fahrenheit day would be read as 297 kelvins!

There are multiple types of thermometer available in the market. A liquid thermometer used the expands of the liquids to measure the temperature. Liquid expands at a regular, measurable rate when it is heated. For this reason, a common form of thermometer contains a liquid in a narrow glass tube. Mercury is one of the most familiar materials used in liquid thermometers. Other liquids, such as kerosene or ethanol, may also be used in these types of thermometers.

When the heat rises, the liquid expands from a bowl or bulb into the empty area, climbing up the tube. When the temperature falls, the liquid contracts and goes back down. Liquid thermometers often include both Celsius and Fahrenheit temperature scales, which are displayed on either side of the tube. 

A maximum thermometer is a familiar type of liquid thermometer. In a maximum thermometer, the liquid is pushed up the glass tube, but cannot fall easily when the temperature lowers. The maximum temperature over a set period of time can be observed after the thermometer is removed from the environment. Maximum thermometers are commonly used to measure a person’s body temperature.

Liquid thermometers can be limited by the type of liquid used. Mercury, for instance, becomes a solid at -38.83 degrees Celsius (-37.89 degrees Fahrenheit). Mercury thermometers cannot measure temperatures below this point. Alcohols, such as ethanol, boil at about 78 degrees Celsius (172 degrees Fahrenheit). They cannot be used to measure temperatures above this point.

Mercury and other liquid thermometers cannot be used to measure temperatures in kelvins. Kelvin thermometers are usually electric devices that can record tiny variations in radiation. These variations would not be visible and may not change air pressure enough to raise the level of mercury in a liquid thermometer.

Electronic thermometers work with an instrument called a thermistor. A thermistor changes its resistance to an electric current based on the temperature. A computer measures the thermistor’s resistance and converts it to a temperature reading.

Today, specialized thermometers are used for a variety of purposes. A cryometer measures very low temperatures, for instance. Cryometers are used to measure temperatures in space. Pyrometers are used to measure very high temperatures. The steel industry uses pyrometers to measure the temperatures of iron and other metals.

Astronomers use infrared thermometers to measure temperatures in space, for instance. Infrared thermometers detect infrared radiation at great distances and correlate it to a specific surface temperature. In 1965, an infrared thermometer detected radiation with a temperature of 3 kelvins (-270 degrees Celsius/-454 degrees Fahrenheit) in all directions in space.

Athletic trainers use pill thermometers to prevent and treat heat-related illnesses like heat stroke. After being swallowed, a pill thermometer transmits information about the body's core temperature for 18 to 30 hours. Pill thermometers use liquid crystals to track changes in body heat and transmit radio waves to a source outside the body, which records and displays this data.


Thermometer is available through Quick Time Engineering Inc.


Loop Calibrator

Loop Calibrator is a hand-held electronic test instrument with a specific purpose, it has been designed and manufactured to perform loop testing, circuit troubleshooting and calibration on current loops. These versatile tools are capable of not only measuring current but also sourcing current to unpowered devices in a loop, as well as simulating the operation of loop-powered transmitters.


Loop Calibrator is available through Quick Time Engineering Inc.


Non-Contact Voltage Testers

Non-contact voltage testers also known as inductance testers are probably the safest testers around. A non-contact tester allows you to check for voltage in wires or devices without you having to touch any wires or parts. The device is like a mini wand with a small tip on the end that senses voltage in such things as electrical wiring, outlets, circuit breakers, lamp cords, light sockets, and switches. The reading can be obtained by simply sticking the tip of the tester into an outlet slot or even touching the outside of a wire or electrical cable.

It takes a battery to power the device, most models inform of the user the voltage present with a red light at the tip of the tester as well as a buzzing sound. They come complete with a handy pocket clip so you can carry it close to your heart and always have it ready for safety purposes. The most basic of these tools provide simple "On-Off" information, indicating only if there is any voltage present or not. More sophisticated (and more expensive) types provide a rudimentary measurement of how much voltage is present, though the measurement is not nearly as precise as that offered by a multimeter or other voltage testers.


Non-Contact Voltage Testers are available through Quick Time Engineering Inc.


Infrared Camera

Infrared (IR) photography follows the basic photographic concept of “capturing light” except it captures the ever-present infrared light around us that is virtually impossible to see with the naked eye.

However, infrared light can be felt as heat. Since heat can be transferred, elements like colours, textures, the sky, trees, and even human subjects will reflect and radiate infrared light differently as opposed to visible light.

An infrared camera isn’t just used for unique and interesting photography, it is also used in many other applications in normal life.

Infrared cameras can detect infrared energy (or heat) without being in close contact with the subjects. Analog infrared cameras use films that are sensitive to stray light. Digital infrared cameras, on the other hand, are conveniently built with infrared sensors that are sensitive to thermal radiation.

For digital cameras to detect near-infrared spectrum at higher sensitivity, the digital cameras either use an infrared-passing filter (or cold mirrors) that will allow IR light to enter tour camera and block visible light or have the camera converted to permanently lost the installed blocking filter and allow more flexibility with a wide range of filters (also known as full-spectrum camera conversion).


Infrared Camera is available through Quick Time Engineering Inc.


Pressure calibrator

A pressure calibrator is simply a pressure measuring device capable of verifying (or calibrating) the pressure reading of another pressure measuring device. These devices might also be called pressure standards. The pressure calibrator mist is more accurate than the device being calibrated. Traditionally, the calibration ratio is 4:1. This means that the pressure calibrator is 4 times more accurate than the device it is calibrating. A pressure calibrator can also have secondary features that facilitate the calibration. For example, a pressure calibrator may have the capability to measure the output from the device under test (DUT). It might also have an internal pump capable of generating pressures used in the calibration, or it could have a precision regulator that can control supply pressure and maintain a precise pressure output. Pressure Calibrator is a widely used term that can mean a lot of different things to a lot of different people.


Pressure calibrator is available through Quick Time Engineering Inc.


Phase Rotation Indicator

The phase rotation indicator is designed for industrial applications. A rotation Indicator is a portable handheld instrument designed to detect the rotary field of three-phase systems. The change in the sequence of the power supply changes the direction of rotation of the machine. It is sometimes also called a phase sequence indicator.


Phase Rotation Indicator is available through Quick Time Engineering Inc.


Quick Time Engineering Inc is an international company with offices and distribution networks in the USA, Hong Kong, Europe and Malaysia.

In its 20 years of operation since 1998, Quick Time Engineering Inc had emerged from a local engineering company with a single staff that provided solutions in factory automation to become nowadays a company that serves the Oil & Gas industries, EPC contractors, System Integrators and other industrial automation and process control companies worldwide. Customers from over 50 countries worldwide trust us with their need for process control instruments and industrial automation products.

For more information about Quick Time Engineering Inc, visit www.quicktimeonline.com or email enquiry@quicktimeonline.com

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