SCR Electroniks make, Shutter Socket Test Apparatus is designed to carry out Socket Shutter Test¦. The apparatus is designed & manufactured exactly as per the IEC & IS Specifications Test Apparatus consists of following parts : 1) Motor to achieve 20 cycles / minutes speed D.C. Motor of suitable is used. 2) Mechanical Assembly : Consists of following parts : Test Plate & Test Plate Mounting Block : On Test Plate socket under test is mounted. Test Plate is in turn mounted on two Mounting Plates with provision for lateral position adjustment. to take care pf different thickness sockets. Provision is made for adjustment along X axis & Y axis, so that µTest Plug Pins¦ engage exactly in to the holes on the µSocket Under Test¦. This is stationary during test. Test Plug with mounting arrangement (moving) : Test Plug is made as per Cl. No. 24.10 fig. No. 25 and mounted on moving block. Movement Transfer Arrangement : Consists of (a) Circular Disc, with offset link (b) Lateral Link, connection between offset link and µTest Plug Moving Block¦. Control Unit. Electronic control unit is with following Controls & Indications. Name Type Function Power ON Switch Rocker Switch (Teknic) Puts the Apparatus ON / OFF. Power ON Indicator Neon v Built v In Indicates Power ON / OFF Counter + Reset Button 6 digit Gujral Make Counts no of cycles. Hold Time Set v 2 digit. Thumb Wheel Switch To set hold time between (1-99 sec). Micro Switch is provided to sense µLimit Position¦ of moving block in forward direction, which triggers the µHold Time Counter¦. After preset time µHold Time Counter¦ resets, and motor starts to actuate backward movement of moving block. Battery Backup : In case mains power goes off, in course of testing, the count is retained, and when mains power resumes the dimmer under test is restored to Off position i.e. Home Position, without this incomplete operation getting counted, and then operation starts normally. To reset count to Zero : Put On the µPower ON Switch¦, while µReset Button is being pushed.