大华安防工具系列 DH-PFM900-E说明书 Tool Series | DH-PFM900-E www.dahuasecurity.com DH-PFM900-E Integrated Mount Tester Features • 4” IPS screen and QWERTY flip keyboard with 45keys ; • Support H.264/H.265 HD decoding protocol; • Support IP , HDCVI/AHD/TVI/CVBS; ...
> 12V/2A DC power supply for the camera > Support RS–485 control, and audio test > Length and attenuation tests of the network cable > Functions of digital multimeter Product Selector System Operation System Linux Language Multi-language interface: English, Chinese, Spanish, French, German, Tu...
PFM900-E Operation System Linux Auto Standby/Shutdown Yes Keyboard Sound Enable/Disable Screen 4.0" TFT screen, 800 X 480 resolution Resolution 1MP, 1.3MP, 2MP, 3MP, 4MP, 5MP, 6MP, 8MP, and 12MP Camera Initialization Yes Charging PoE 48V---0.32A RS---485 1 Digital Multimeter Port ...
1、脉冲频率调制(Pulse frequency modulationPFM是频率的有和无的变化) (1)、导通时间不变,断开时间变; (2)、断开时间不变,导通时间变; 一种脉冲调制技术,调制信号的频率随输入信号幅值而变化,其占空比不变。由于调制信号通常为频率变化的方波信号,因此,PFM也叫做方波FM。 优点: (1)、PFM相比较PWM主要优点在于...
PFMV5 Manifold mounting •Mount the bracket using the mounting screws supplied.•The required tightening torque is 0.32±0.02 Nm.•Mounting in series using the mounting brackets is not suitable for all models, depending on which fitting type is used.Thank you for purchasing an SMC PFMV5 ...
型号 PFM0812HE-01WMJ 价格说明 价格:商品在爱采购的展示标价,具体的成交价格可能因商品参加活动等情况发生变化,也可能随着购买数量不同或所选规格不同而发生变化,如用户与商家线下达成协议,以线下协议的结算价格为准,如用户在爱采购上完成线上购买,则最终以订单结算页价格为准。 抢购价:商品参与营销活动的活动...
1.截止作用.阀门是关闭(关闭)管道中的流体,不会使其流动,一般情况下各种管道的阀门主要起截止作用.2.调节作用.阀门可哟根据工作条件或要求调整介质流量,温度,压力,液位等参数,流量控制取决于阀门开度的大小调整.3.止逆作用一些管道需要中等流量朝一个方向流动,不允许逆流或倒带.使用止回阀可以防止介质回流.4.安全...