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http://www.welding-suppliers.nt-weight: unset;text-decoration:underline;">jump rope</a></span></p><p></p><p>jump rope,High Qualittp://www.welding-suppliers.com/jump-rope/" style="color:unset;font-size: unset;font-family: unset;fointerference between the transmitter and the receiver. <p><span class="keywords_replace"><a href="httting end or the receiving end, or a detector having a frequency modulation function can also avoid frared intrusion detectors on the same straight line should be opposite to each other at the transmietector cannot work normally. <br><br> Therefore, during actual installation, two pairs of active inof a pair of detector's transmitters enters the receiver of another pair of detectors, and the d be installed opposite to the transmitter or receiver. Otherwise, it will happen that the radiation . <br><br> Two pairs of active infrared intrusion detectors mounted on the same straight line should branches blocking the detector rays, etc., will greatly affect the effect of the perimeter detectorre too large, the wave at the top of the fence or the distance from the top of the column, the denset. For example, in order to beautify some communities, the pillars are very tall, the column lamps a perimeter protection device is not installed properly, resulting in not reached To detect the effecty, such as green, if not coordinated in advance, prone to dead ends and vulnerability, resulting in the perimeter detectors installed must be reasonable in coordination with the perimeter of the entig time. <br> <strong><br> Other installation requirements</strong> <br> <br> should pay attention tonext jump time (when the person jumps, the blocking time may be less than 20ms) to delay the blockinpeed of climb. To be much lower than the speed of the next jump, so the climb time is more than the er detector is generally required to be installed on the top or outside of the wall because of the sorder to avoid (20±10%)ms<obstruction time<(40±10%)ms(uncertain time domain for alarms), the perimet The occlusion time is determined by the speed of the occlusion object and its occlusion volume. In es that there is an indefinite time domain for alarms (20 ± 10%) ms <occlusion time < (40 ± 10%) ms.the beam is blocked ≤ (20 ± 10) %)ms, the detector should not generate an alarm signal. This indicatctor beam is blocked ≥ (40 ± 10%) ms, the detector should generate an alarm signal; the duration of tention. According to the national standard (GB10408.4.-2000), when the duration of the general deteong> <br> <br> active infrared intrusion detector response time of installation should be special ats always ≤ 70 meters, making it easier to locate the alarm. <br><br> <strong>Mounting positions</strinal value of ≤ 100 meters (used at a detection distance of 70 meters), so that the detection zone i outdoor applications. <br><br> In addition, long-range detectors generally require the use of a noms of reliability, stability, and economy, it is reasonable to select dual beam detectors for generalroves the reliability and stability of the detector to a certain extent. <br><br> Therefore, in termm) does not cause false alarms due to the blocking of a beam by small animals, leaves, etc. This imp wall, causing an alarm. <br><br> However, the use of a dual-beam detector (compared to a single beaop of the wall. This ensures that the intruder will block the two infrared beams when they cross the-beam active intruder, the lower beam of the detector is required to be about 150 mm away from the tared intrusion detectors are also used in some special applications. <br><br> When installing a dualic point of view, dual-beam active infrared detectors are also preferred), but four-beam active infradvisable to use dual-beam active intrusion detectors on perimeter perimeter walls. (From the economed. Four-beam active infrared intrusion detectors have fewer false alarms. However, it is generally infrared intrusion detector is selected, an infrared ray may not be blocked and an alarm may be missapproximately 500mm (body width) x 200mm (body thickness) or so. For example, if a four-beam active two-beam active infrared intrusion detectors. In general, the normal human cross-sectional area is rong> <br> <br> on single-beam, dual-beam, four beams detector selection, conventionally have chosenct walls that are ≤ 240 meters in actual use ( Fence). <br><br> <strong>Select the required beam</stal conditions should be 1,800 meters (six times the nominal value), but it can only be used to protetector with a nominal value of 300 meters, the distance that can be detected under ideal environmentce is less than or equal to 70% of the nominal value of the factory”. <br><br> For example, for a deequirements of the technical regulations. The current consensus is: “The actual detection use distanproperly. Therefore, in actual use, the margin is often increased according to the regulations and rnditions, which means that outdoor wind, snow, rain, sand and other conditions must be able to work cal requirements. Outdoor detectors need to take into account the outdoor environment and weather cod detector should be 6 times the nominal detection distance as required by the detector's technir> The detection distance requires that the maximum detection distance of the outdoor active infrareoor type 30g, 18ms. In short, outdoor requirements are significantly higher than indoor ones. <br><b75mm; one octave / 1 minute; <br><br> 4. Impact resistance requirements: Indoor type 15g, 11ms; Outd(93 ± 2.3)%; <br><br> 3, anti-vibration requirements: 10Hz ~ 55Hz sinusoidal vibration, amplitude 0.0 °C; relative humidity: ≤ 95%; <br><br> 2, constant humidity and heat requirements: +40 ± 2 °C, RH hstand high and low temperature performance: indoor type: -10 °C ~ +55 °C; outdoor type: -25 °C ~ +7s selected, the following requirements should be met for the applicable environment: <br><br> 1, witvironment. According to the national standard (GB10408.4.-2000), when the active infrared detector ig> <br> Outdoor and indoor active infrared detectors have higher requirements for the application enve the infrared beam. <br><br> <strong>Active infrared detector environment requirements <br></stronly blocked by a given percentage, the receiver will generate an alarm signal because it cannot recei the transmitter. When the infrared beam emitted by the transmitter is completely blocked or partialver. The transmitter emits an infrared beam while the receiver receives the infrared beam emitted by <strong>The active infrared intrusion detector</strong> consists of a pair of transmitter and recei
