What is a temperature transmitter?

 A temperature transmitter is an electronic device used to send a temperature measurement over two wires to the processing unit. The transmitter is responsible for converting the small electrical signal from the temperature sensor into a more readable signal for the processing unit. In most cases, the signal is sent to some sort of programmatic logic controller (PLC) or receiver. 

If you are thinking about using thermocouples, resistance temperature detectors (RTDs), or thermal resistors and are wondering how to communicate their micro-signals to the industry standard 4-20mA, then you must use a transmitter.

Transmitters are commonly referred to as transducers because of their close proximity in definition and can be used interchangeably.

Transmitters are physically designed to accept and deliver many different types of inputs and outputs. They require a power supply voltage and have different physical shapes depending on your application.

How do temperature transmitters work?

Transmitters aim at amplifying and filtering the signal from the temperature sensor. How this is done varies slightly based on the sensor in use. 

For example, when using a RTD, a Wheatstone bridge is used to create a small voltage across its extremities. This signal is then amplified to produce a 4-20mA signal. Sometimes, this analog signal is converted to a digital signal (ADC) to allow for additional functions (such as calibration and scaling), then returned to an analog signal.  The conditioning circuitry can be designed for resistance values from 15 to 380ohms or something similar to accommodate the full range of RTD values. 

The electronics inside the transmitter will draw 4mA from the power supply when the temperature is at the low-end setpoint and will draw 20mA when the sensor is at the high-end temperature setpoint. For example, if your temperature range of your sensor is 0-100 ℃, then a 4mA signal would correspond to 0℃ . In the same way, 20mA would represent 100℃. Using 4mA as the low reference makes it much easier to notice when your system is malfunctioning. That being said, transmitters are designed for numerous inputs and outputs.

What are the inputs of a temperature transmitter?

The most common types of inputs for  Rosemount temperature transmitters are thermocouples and RTDs.Thermocouple Input

In the industry today, transmitters for thermocouples are normally designed for the base metal thermocouples. Those are type: K,T, J, and E. That doesn’t mean that you won’t be able to find transmitters for other types of thermocouples but they may be more expensive.

Thermocouples have two wires, so the transmitters will have two input terminals where the wires can be connected. It is important to wire the thermocouple correctly. The transmitter should be purchased with cold junction compensation. Cold junction compensation is used as a reference for the junction that is immersed in the environment. 

Thermocouple transmitters will have a Zero and Span dialog that will be used for calibration purposes. You must fine turn the device using these potentiometers, if you notice your device is reading incorrect values.

Professional Transmitter Supplier, providing you with high-quality temperature transmitter, pressure transmitters from Rosemount, Siemens, ABB and other brands.

How to clean a computer touch screen?

 An industrial touch screen is an industrial monitor with a touch function. When the industrial environment is harsh or the user operates improperly, it will cause the industrial touch screen to malfunction, so it is necessary to carry out regular cleaning and maintenance. So, what are the correct cleaning methods? How to clean a computer touch screen? How to clean the touch screen without causing damage?

1: Choose Ultrafine Fiber Cloth

Distilled water or special commercial touch screen cleaners.

2: Steps/Methods

(1) Turn off the touch screen and unplug it from any power source.

(2) Use a dry, lint-free cloth to gently wipe the surface of the screen to remove any dirt or debris.

(3) If the screen is particularly dirty or greasy, you may need to use a cleaning solution. Mix a small amount of mild soap or alcohol-based cleaner with water, and use a soft, damp cloth to gently wipe the screen. Avoid using harsh cleaners or abrasive cloths, as these can damage the screen.

(4) Once you have finished cleaning the screen, use a dry, lint-free cloth to dry it thoroughly.

(5) If the touchscreen has a protective overlay or screen protector, be sure to clean it as well.

(6) It's important to handle the touch screen gently and avoid applying too much pressure, as this can damage the screen. If you are unable to remove dirt or stains using the above method, you may need to contact the manufacturer for additional cleaning instructions.

 3: Tips

In order to avoid unnecessary troubles, please do not use too hot water to clean the screen. Do not use any cleaner containing ammonia unless the industrial display manufacturer has explicitly indicated the touch screen of the product. Ammonia may damage the screen. Avoid spraying liquid or water directly on the screen. Instead, spray it on the superfine fibers, squeeze it to remove any excess liquid, and then wipe the screen carefully. Do not use tissue or toilet paper. They contain wood fibers that scratch the surface of any plastic product. You may not see scratches for the first time, but as time goes on, your screen will look like you clean it with very thin steel wool, which will make the image looks dark and a little blurred. Don't press too hard when cleaning the screen, you may damage the monitor.

 

These are some small tips for cleaning industrial touchscreen monitors. Besides, users should pay attention to correct operation when using industrial monitors, so as to avoid damage to the industrial touch screen as far as possible.

How to Use The Combo Rack in Three Easy Steps

The gym has its own share of mysteries.  Whether it’s all the different straight bars, or all of the specialty ones, all the different machines, or even how to execute different movements, unlocking the secrets of the gym can have newcomer and veteran alike scratching their heads.  In hopes of saving others some of the confusion I’ve experienced, today I’m going to outline the intricacies of one particular piece of equipment that tends to cause a lot of confusion:

The Combo Rack – What Can I Do With It (And How)?

If you began your lifting career in a commercial gym, it’s highly likely you did not start out benching and squatting in a combo rack.  For a lot of people, the first time they see one of these racks is at a competition (and for many, it’s only when the technical official conducting their weigh-in asks them for their squat and bench rack heights that they realize they are going to have to go examine the rack in greater detail).

 

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A combo (combination) rack is a competition-spec rack that you can either bench or squat out of. 

Now that we’re clear on what a combo rack is/does, we need to set it up for use.  While these racks can look confusing, there are really only three easy steps that you need to take in order to be ready to lift.

 

Step 1 – Bench or Squat?

If you’re squatting, you’re obviously going to need to get the bench out of the way.  While not required, you may also want to remove the spotting arms.  While they look really similar to the spotting arms on a power rack, failing a lift and dropping the bar onto these spotting arms can often cause the rack to tip or flip, because the combo rack is not bolted to the ground.  If you’re like me and sometimes squat a little crooked, you can also accidentally hit the spotting arms with your plates while squatting, which can really throw you off balance.  So, long story short – it’s good to know how to get both the bench and the spotting arms out of the way.

To remove the bench, you’re going to grab it close to the front (this is where it is heaviest) and lift up:

 

If you are lifting and it doesn’t budge, someone has probably locked it in place (most lifters don’t do this as the bench is quite secure without).  To unlock it, you need to look for the wingnut in front of the holder for each of the two front bench legs.  Once this is unscrewed on both sides, you’ll be able to lift the bench up and out.

The bench makes a great place to sit in between sets, so feel free to keep it nearby.

Next up:  the spotting arms.  These slide into the base of the rack:

Sometimes, they can be rather tricky to remove.  In the video you can see that I’m pushing up on the rack while pulling the spotting arm back; essentially I’m trying to make it so that less weight is pushing down on the arm so that it will come out more easily (shout out to our good friend gravity).

You may be tempted to pull the silver pieces of the spotting arms (the arm proper) out of their holders instead of removing the whole apparatus.  It’s really preferable that you don’t do this.  More pieces floating around generally means more pieces that could go missing, and honestly – if you have the time to remove the arm, you have time to remove the whole apparatus.

It probably goes without saying, but if you’re benching, you’re going to want to follow the above steps in reverse and ensure that both the bench and the spotting arms are in place.

 

Step 2 – Set Your Rack Heights

If you’re squatting, you are going to need to set just the rack height; if you’re benching, you’ll need to set both the rack and the spotting arms.  To set the rack height, you’re going to need to locate the pins on the outside of each side of the rack.  There should be two (one will be setting the rack at its current height; the other should either be sitting in another rack height hole, or in the storage hole).

 

Conveniently, the racks come with a jack attached to both sides.  All you have to do is hook it to one of the pins (you can use the pin currently setting the rack height if you are looking to increase the overall rack height; you will insert the second pin into a lower numbered hole and hook the jack to that if you are looking to decrease height).  You can make jumps of roughly eight holes at a time, so if you’re sharing a rack with someone significantly taller or shorter than you are, you’ll need to adjust the rack in two adjustments per side versus one).

 

Note: 

Do not put the pins in the rack such that the thick part is on the outside of the rack (facing the barbell sleeve).  Once you put plates on the bar you will not be able to adjust the rack.  This may not be a big deal when you are training alone, but it truly sucks if you’re training with someone, or if you’re at a competition.  You’re better off to just always put the pins in with the thick part to the inside of the rack.

Whereas each upright comes with two pins, the spotting arms come with one pin.  To adjust, simply lift up on the arm and put the pin in the number that represents your desired height.

 

Step 3 – Setting the Rack In or Out (SQUAT ONLY)

A large majority of lifters are going to be able to skip this step, but it’s a good rack feature to know about (especially if you are ever going to volunteer at a meet; inevitably someone will want racks in).

With the racks “in”, the uprights will be angled inwards ( / \ ) as opposed to being straight up and down ( | | ):

 

Lifters who grip the bar closer to the collars will often ask for racks in to give themselves more space for their hands.  You may also encounter some lifters who choose to have either the left or right rack in (and then other out).  Thankfully, it’s very quick and easy to switch the position of the rack, and this can be done even with a fully loaded bar.  Simply locate where the upright fits into a sleeve – there will be moveable cuff (typically with wingnuts on it) that you can lift upwards.  With this cuff up, you will be able to either push the upright into the racks out position, or pull it to the racks in position.  When you’re done, you just put the cuff back down into the sleeve.

How to Properly Use a Welding Positioner?

When operating a welding positioner, safety is always the top priority. It is important to ensure you're your welding positioner is always secure to a flat, stable surface. Benchtop welding positioners should be secured as well.

Positioning devices, whether purchased or rented, are accessory tools that can be implemented in the welding process by holding, lifting, and rotating parts, somewhat like a rotisserie chicken. Generally, these devices are categorized as either single-column or tailstock/headstock positioners, and control orientation with certain types of rotators to allow 360 degrees of rotation for easy access. Headstocks and tailstocks control the weldment's height for aid in rotation and are synchronized to stay level. A single operator can easily run these machines alone.




Automatic Welding Positioner

Not just used for large assemblies, positioning equipment is also ideal for use on smaller projects. The good news here is that, regardless of the size of your weldment, the principles of positioning are the same. Your base product is secured to the equipment via clamps or bolts, and then mechanically guided into an orientation that allows you the most effective and comfortable position to weld and assembles in. As parts are added, the whole weldment can be moved to gain easy access to weld joints. Coordinated with robotic welding, positioners can even speed up operations.


Regardless of size, a properly positioned weldment saves space and increases safety and productivity. These devices also aid in reducing welder fatigue, which, in turn, improves weld quality. By being able to move the weldment mechanically to position it within your comfortable range of movement, you are not forced to weld at odd angles, allowing you to work at your best for longer. By anchoring your weldment to an appropriate device, you can further improve workshop safety. Slings, chains, cranes, and other similar methods can create uncontrolled motion, which can be dangerous. By utilizing a suitable positioning device, you avoid needing to place yourself under a most likely heavy weldment, reducing risk of injury from a possible faulty device, and also from falling slag and sparks.




No matter the weldment size, you should keep the following in mind when choosing, operating, and maintaining a positioner:
Points to Know When Working on Weld Positioners

Here are some things workers should keep in mind when welding on a weld positioner:



ㆍThe center of gravity is the point where the mass of an object is held. So, when you select the positioning weld, it is important to consider the center of gravity of that workpiece along with its size and weight. This facilitates an equal balance of the workpiece on all axes. This also determines the speed of rotation of the table. CoG will change when the welder adds parts of various weights and sizes to the positioner. This point also needs to be considered.

ㆍThe way in which the workpiece is anchored onto the welding positioner is a crucial factor because this is also the way in which it would separate once the task is done. Some specific tasks which need to be repeated to produce parts for typical applications use unique production fixtures. Other than this, for round-shaped workpieces, usually, a three-jaw chuck may be used for attachment to the positioner. Some pieces need to be bolted. So, this needs to be figured out according to the shape and size of the workpiece.

ㆍEnsure that the whole weld positioner unit is mounted onto a flat, even surface. Else, the workpiece may fall off, and this could be dangerous. You can mount the positioner vertically onto a workbench or a stand; however, it must be fastened well.

ㆍIt is also important to check the manufacturer specifications for your welding positioner. The motor and control are based on the size and speed required for the welder to perform, and the manufacturer's specifications will inform you whether the welding positioner can handle the operation you need to perform.

ㆍA ground current should also be connected to the positioner during welding. Without it, electrical parts can be damaged. You should also make sure that the positioner is compatible with the electric current produced by the welding process.



CENTER OF GRAVITY (COG)

When selecting a positioning device, it is just as important to take the weldment's center of gravity (COG) into account – and how far away it is from the positioning device – as well as its weight and size. The COG is the point of the weldment that balances equally on all axes, and the further away a weldment's COG is from the device, the more torque that is applied to the positioner. Bear in mind, as you add material and parts to the positioner, your weldment's COG will change and should be taken into account.




CORRECT ATTACHMENT

How you attach the weldment to the device is just as important as the positioner itself. Positioners have fixtures permanently attached that have been designed for specific, repetitious actions, and their specific shapes allow for easy part alignment. Fixtures and chucks add additional weight and distance to the faceplate and should be taken into consideration when positioning and sizing. Also keep in mind that while the weight of the weldment will apply torque to the positioner, the distance that weight is applied multiplies the torque by the increase in distance, which may require a larger machine.






Double Column Positioner



CYLINDERS

Turning rolls are useful if the weldment you are working on is cylindrical. There are two types of roller positioners – idler and powered. Powered rolls provide stable, constant rotation to help give you uniform border welds. Idler rolls, however, are not mechanized and can be added to powered rolls to provide support for longer cylindrical weldments. This combination supplies additional safety and stability, and when the rollers have two points of contact, the weight is evenly distributed and the COG is adequately supported.



ORIENTATION

Keep it flat, even with small positioning devices. It is important that the equipment is mounted to an even, flat surface to avoid the entire thing toppling over when encountering an unexpected force. Use mounting holes when provided, and be sure to secure positioners mounted to stands or workbenches.



CONNECT GROUND CURRENTS

While welding, make sure any ground currents are connected to the device to avoid mechanical damage and having to replace the welding clamp often. The ground current will transfer from the table and into the positioner's chassis and will save the equipment's electrical parts from becoming damaged and, thus, prevent subpar welds. It will also save you the hassle – and cost – of continuous removal and exchange of welding clamps.
What are the Different Applications of Weld Positioners?

Weld positioners are commonly used in many industries where welding and fabrication are required. Here are some of the application areas of weld positioners:

ㆍRotary positioning

ㆍRotation of parts for assembling

ㆍMounting of welding equipment

ㆍWelding of shafts, wheels, pipes, and more

ㆍRotating workpieces with huge offset loads



By using welding positioners, you will put yourself in a position to consistently produce high-quality welds. These devices can allow for reduced rejection rates with increased precision on complex projects and jobs, while also providing welder comfort. In addition, manufacturing costs of positioners often tend to be lower than that of a standard rotary table. We are a welding positioner supplier, please contact us if you need them!


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What Features Do I Need to Consider for Hiking Poles

Trekking poles and hiking sticks are standard equipment for many walkers, hikers, trekkers, backpackers and snowshoers. The reason is simple: they enhance your stability and provide support for all types of terrain.

Depending on how you plan to use the poles, you may want to consider poles that have some of the following features.

Adjustable

Many trekking poles are adjustable in length to improve stability on different terrain. They are usually adjusted to be about 24 to 55 inches long. Often, you will need to shorten the pole on uphill and lengthen it on downhill.

Non-Adjustable

The length of some trekking poles cannot be adjusted. They are great for activities where you know you only need a certain length.

Collapsible

Collapsible trekking poles function somewhat like tent poles, rather than folding into themselves like adjustable poles do.

Adjustable Aluminum Trekking Pole for Hiking MW1013

Foldable

Collapsible trekking poles function a bit like tent poles, rather than folding into themselves like adjustable poles. Collapsible poles are usually the easiest to pack and are usually very lightweight and quick to deploy. They are especially popular among ultrarunners and fast hikers.

Shock Absorbing Poles

These poles offer internal springs that absorb shock as you go downhill. For most bars, this feature can be turned off when not needed, such as when going uphill. Shock absorption is a nice feature for any hiker, but is especially recommended if you have an unstable hip, knee or ankle or have had any previous injuries to these joints.

Ultralight

The advantage of ultralight clubs is that the swing weight is lighter, which makes them easier and faster to move. On long hikes, this means less fatigue. Ultralight clubs are also easier to pack. The material of the shaft is a key determinant of the overall weight of the pole, and REI classifies ultralight poles as those weighing less than 1 pound per pair.

Tips for using trekking poles

Fortunately, there is a quick learning curve for using trekking poles. With a few tips and suggestions, you’ll be ready to hit the trail.

Alternate your poles and legs

Most hikers are used to using their trekking poles quickly and getting into a proper rhythm with the opposite foot (right foot, left foot, left foot, right foot, etc.) planting the opposite pole in time. If you lose your rhythm, simply keep walking while lifting the pole off the ground for a moment so you can reset.

Walking naturally

When using trekking poles, it is best to walk naturally, keeping your arms swinging naturally, as if you did not have poles in your hands. The poles may be tilted slightly behind you so that you can push off to help you move forward as you plant them.

Trekking poles can be very useful when you encounter obstacles on the trail. When you have to wade through water, poles can provide much needed stability. In order to stand up on boulders, poles can give you a useful push. To straddle the logs, simply plant the poles in the ground and use them to maintain stability. If you are walking over a log to cross water, you can use the poles to extend the poles out to the sides to improve balance.

In conclusion, there are many factors to consider when buying trekking poles. This article is only a part of the introduction, we will continue to update the blog afterwards, you are welcome to consult us to get a product quote, MANGO provides professional solutions.

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