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In the application of solar street lights, attention should be paid to the overcharge and overdischarge of their batteries. The so-called overcharge control is to disconnect the charging circuit when the battery is overcharged, and the overdischarge control is to disconnect the discharging circuit when the battery is in an overdischarged state. This is done to protect the battery and extend it. Service life. The basis for judging overcharge and overdischarge is the change of the battery voltage: When the sun shines on a sunny day, the energy absorbed by the solar photovoltaic panel is charged to the battery via the relay switch normally closed point. When the battery voltage is higher than 26V, the battery In the overcharged state, the relay switch is normally closed and the normally open point is closed. The charging circuit is automatically disconnected to stop charging the battery and achieve the overcharge protection function. At night, the battery supplies power to the street lamp when the battery voltage is lower than 22V. The battery is in an over discharge state. The relay switch is switched from the normally closed point to the normally open point. The discharge circuit is automatically disconnected, and the power supply to the load (street lamp) is stopped, and the over-discharge protection function is realized.
Mastergrip Laser Distance Meter
Product Description:
A laser distance measure is an advanced measuring tool to measure any distance without any efforts. It has a laser beam that is produced by the meter with the help of a battery and reflects it through a lens. The meter can measure the distance covered by the leaser and the result is shown on the display. Mastergrip laser distance meter is a digital distance measuring tool for precise and effortless measurement taking. It is an ideal measuring device for contractors, insurance adjusters, architects, flooring professionals and other people who do a lot of measuring. However, homeowners can easily use laser tape measures around the house, too.
User instruction:
Place the device on one end of what you want to measure, and then aim the laser beam so that it hits an object at the other end..If there's no wall, pole or anything like that, put a target at the spot you want to measure up to. The process is similar to using a conventional tape measure, except you use a laser beam instead of metal tape. Once you have the laser at the right spot, press the button, and the tape measure calculates the distance and displays it on its screen. The calculation is done through precision optics and laser physics using the phase-shift method, in which a laser hits an object and compares its reflection with the beam sent out, or using the time-of-flight method in which the time it takes for an optical pulse to reflect back is calculated. Some laser tape measures let you measure multiple distances and add them together automatically.
Specification:
|
Brand |
WINTAPE or customized |
|
Material |
Metal case |
|
Size |
L 120mm * W 60mm * D 29mm |
|
Measurement Accuracy |
+/-1.5mm |
|
Measurement Range |
0.03-100m |
|
Smallest unit display |
1mm |
|
Laser switched off automatically |
15 seconds |
|
Device switched off automatically |
360 seconds |
|
Laser type |
Class2,635 mm,<1mW |
|
Water-proof and dust-proof grade |
IP54 |
|
Unit conversion |
meter / inch / feet |
|
Operating temperature |
0 ºC to +40 ºC (32ºF to 104ºF) |
|
Storage temperature |
-10ºC to +50ºC (14ºF to 122ºF) |
|
Battery powered |
1.5V*2 pieces AAA type (R03 / LR03) |
|
Battery life |
> 5000 times |
|
Weight (approx.) |
110 g (without battery) |
|
Security |
EN-71,RoHS, 6P |
|
Packing |
1pcs/box+inner box, 50pcs/carton, Carton size:53*25*31cm NW/GW:9/10kgs |
|
Payment Terms |
T/T( Paypal, Bank Transfer), Western Union |
|
Shipping |
By Sea, Air, Express
|
Measurement accuracy: +/-1.5mm
Measurement range: 0.03-100m
Smallest unit displayed: 1mm
Single measurement time: 0.1-3 seconds
Measuring unit: m/ft/in
Laser grade: Class II
Laser Type:635nm, ＜1mW
Inclinometer: 0/90 degree
Continuous distance measurement: Supported
Area/volume/pythagorean measure: Supported
Min and max measurement value: Supported
Measuring reference switch: Supported
Display illumination: Supported
Battery type: AAA size alkaline battery 1.5V*2
Water-proof and dust-proof grade: IP54
Operating temperature: 0℃-40℃
Storage temperature: -20℃-60℃
Laser switched off automatically: 15 seconds
Device switched off automatically: 360 seconds
Dimensions: 117*50*26mm
40M Laser Measure,Handheld Digital Distance Meter Measure,Digital Distance Meter Measure
Wintape Measuring Tape Company , https://www.wintapetapemeasure.com