When multiple surveillance cameras are used for testing, the same lens should be used (recommended for fixed focus and two variable lenses). The center circle of the test card appears on the left and right sides of the monitor screen. Clear and accurate numbers are given. The ticks consist of 10 vertical lines and 10 horizontal lines. Represents vertical resolution and horizontal resolution, respectively, and the corresponding set has given the number of lines. For example, the vertical 350 lines are horizontal 800 lines. At this time, it is best to use a black-and-white monitor. The test can focus on distant objects or focus on the edge. It is best to use both, and you can see the differences in this camera (for far and near convergence).
Second, the monitoring camera color reproduction test
Test this parameter should choose a good color monitor. First, observe characters and costumes from a distance to see whether there is color distortion or not. Compare the objects with vivid colors. Look at the sensitivity of the surveillance cameras. Before taking the color pictures on the surveillance cameras, look at the pictures clearly, too light or too thick. Take color pictures of moving objects to see if there are color trails, delays, blurs, etc. The test conditions such that the maximum illuminance of the camera should be measured under 50+10V illuminance at 50V, that is, 10V on the basis of the most illuminance of each surveillance camera, and the aperture should maintain the closest state.
Third, illumination
The surveillance camera is placed in a dark room. Before and after the dark room, there is an active 220V self-firing lamp. A voltage regulator is provided at the place where the regulator adjusts the voltage generation to adjust the brightness of the dark room lamp. The voltage can be adjusted from 0V to 250V. The indoor illumination can also be adjusted from the darkest to the brightest. When the camera's aperture is open to the maximum, the next minimum illuminance value is recorded during the test (the active light regulator is dimmed to a position that cannot be seen in the dark interior). Hit the minimum and then record the next minimum illuminance value.
IV. Backlight compensation of surveillance cameras
There are two methods to test this parameter. One is in the dark room. Turn the front lamp of the camera on and adjust it to the brightest. Then place a picture or text under the lamp to watch the camera and watch the image. And whether the text can be seen, the picture is not harsh, and adjust the AL, AX gear switch to see if there is any change, which effect is best. The other is to take the camera out of the window when the sun is shining. At this time, you can see if the image and text are clear.
Fifth, the monitoring camera distortion
Look at the distortion of the surveillance camera. Place the test card at the front of the camera so that the entire sphere appears on the screen. See if the sphere has an ellipse. Move the camera forward to see if the center of the circle is magnified, and then test whether the edges, corners, and boxes have arcs. Shape distortion and so on.
Six, monitoring camera power consumption
Minimum operating voltage, use a multimeter to measure current, use a small regulator to adjust the voltage
In the security system, the image generation is currently mainly from the CCD camera. The CCD is an abbreviation for charge coupled device. It can convert light into charge and store and transfer charge, and can also take out stored charge. Since the voltage changes, it is an ideal surveillance camera component. The CCD camera formed by the CCD camera is widely used due to its small size, light weight, the influence of the magnetic field, and the resistance to earthquakes and shocks.
10W Mini Glue Gun Ptc Heating Features:
1. Versatile
2. Easy
3. Quick
4. Proective Nozzle Cover
5. Trigger Flow Control
6. Bonds instantly
7. High quality
8. High temperature or low temperature
Idea for many applications. Fastening various materials such as paper, cardboard, fabric,wood, lace,trims,leather,metal,glass, tiles, rubber, ceramics and flooring etc. Ideal for hobby and household repair,DIY&craft projects.
Designed and manufactured to the highest of standards to ensure a robust and long life, we hope it provides you with many years of trouble-free, safe and reliable service.
General Safety Information:
1. Check if the plug cord was in good condition, and if there is stand before plug into the electrical outlet ; Check if the used glue gun has glue flow through back of the tunnel;
2. wait 5-10 minutes to allow glue to soften, stand up the glue gun on the table when not in use;
3. Touch nozzle to any clean, dry surface you wish to bond, to avoid any impurity stop the nozzle;
4. If the glue could not flow from the nozzle when the glue gun start to work, check if the glue gun are heating;
If glue
gun can not be heated, there are following reasons:
1
Plug cord into electrical outlet not
properly;
2
Glue gun has been destroyed owing to
inner cord short circuit;
If glue gun can be heated, there are following reasons: Nozzle has been stopped by any impurity, ask careerman to manage it.
5. Do not use the glue gun under moist climate, humidity will affect insulation and cause electric shock;
6. Do not touch the nozzle or melted glue;
7. Do not remove out the melted glue stick from the tunnel back side, it will damaged the glue gun as well as scalding person hands.
8. Do not to disassemble or assemble any glue gun accessories freely, it will cause glue gun do not work properly;
9. Keep out of reach of children and stocked it beyond any of Children palpable side;
10. Only used for melting glue stick, no other usage;
11. When in use, there are any glue flow back from tunnel, stop using immediately, wait for careerman clean the glue;
12. Close the power if the glue gun not in use after 15 minutes;
Important Caution:
1． Before use the glue gun, check if the plug cord into electrical outlet properly;
2． When glue gun in first use, the heating element will have small smoke, it is normal situation, but the smoke will disappeared after 10 minutes;
3． After power, not for a long time in standby mode(not longer for 20 minutes), when the suspension of use, unplug first.
4． Avoid to use the glue gun under very hot or very cold environments.
5． Better not work under direct cold wind blowing, it will reduce efficiency and loss power
6． When in continuous using, do not press the trigger with great pressure, and try to squeeze out the un-melted glue, it would damage the glue gun
7． Not applicable for bonding heavy objects or objects needed strong adhesive
8． The quality of glue stick will directly influence the glue gun function and sticking objects quality;
9． If the power cord is damaged, do not replace it by yourself, must ask for professionals to replace it.
10． This tools must b e placed in its position when not in use. And storage before the tools complete cooled.
11． Be careful when using any other electrical appliance with flammable material.
12． Not applicable for a long time in the same place.
13． Do not use an explosive gas atmospheres.
14． Note that heat may be the line of sigh, combustible materials.
15． Do not leave equipment unattended when switched on.
16． This appliance is not intended for use by persons(including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
17. Children should be supervised to ensure that they do not play with the appliance.
Using methods
1. Glue gun using voltage is 110-220V AC,50/60Hz;
2. Tip gun forward on stand and place a piece of cardboard under the nozzle
3. Use 7-8mm
(mini trigger glue gun), 11-12(big trigger glue gun), insert glue sticks
through
tunnel at back of gun
4. After power, wait for 5-10 minutes to allow glue to soften
After glue softens, squeeze trigger to feed glue through glue barrel. Excessive force will damage glue gun. Put down nozzle after work, disconnect the power plug
Mini Glue Gun
10W Mini Glue Gun, Mini Glue Gun, Small Glue Gun, Electric Glue Gun
Ningbo Kingvos Electrical Appliance Co.,Ltd , http://www.kingvos.com