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Security Without Keys
If 12345Y is mistakenly pressed, rather than 1234Y, again, all the red tumblers would be aligned for opening, however, because the digit 5 has also been pressed, the notch of that blue tumbler will have been moved to a position where it will restrict. If, on the other hand, 1234 is entered, the pathway will again be restricted by the red tumbler 'Y', not being pressed.
To sum-up this process:
The lock is always restricted by the red tumblers. By pressing the buttons that correspond to them, a clear pathway is made. By not pressing the buttons to all the red tumblers, the path remains blocked.
The none coded blue tumblers work the opposite way. By pressing any of them, the pathway is blocked. If none of the none coded buttons are pressed, the pathway is always open.
To be able to open one of these locks without knowing the correct code, would require (as in this case) five buttons to be pressed without any errors, at the first attempt! And the chances of someone attempting to guess the correct code would find it very difficult. Not unlike picking the winning lottery numbers. |
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Changing the Code
When a new lock of this type is purchased, it comes set with an unique code, which is printed on a card, sealed within the packing box. To change this code, the tumblers need to be rearranged. To do this, four small screws will need to be removed, so as to lift off the back cover plate of the lock case. This provides access to the tumblers. By using the tweezers provided and at the same time pressing and holding down the 'C' button the tumblers can be removed.
The code is set to 1234Y, and is going to be changed to 7956X. First, remove the five red tumblers from behind buttons 1234Y and place them to one side. Next, remove the five blue tumblers 7956X and place them into the slots which have been vacated by the red coloured tumblers that have already been removed. Now Place the red coloured tumblers into the new spaces 7956X, which changes the access code to those digits.
It is also important to ensure that when the tumbles are placed into their compartments, they should all fitted in the same way that they were removed, i.e, with the notches to the outside edge of the lock case. |
This process may sound like a daunting task, but when you have done it once and understand the principle, it's a job that can be done from start to finish in about ten minutes, or less. The Back Plate is fitted to the inside face of the door and is operated by a thumb turn or knob. From the inside no code is required, simply turning the thumb turn opens the lock. On some models, the back plate has a 'snip' that holds the latch back in the open position, so that one can enter without using the lock. This is useful for such occasions where goods are being brought into the building.
Fitting
Installing the digital lock is not a complicated process to anyone experienced in using woodworking tools, as the lock comes with good fitting instructions. The first thing that you will encounter before fitting, is determining which 'hand' the lock needs to be set to. This means that the knob will either need to be turned clockwise or counter clockwise to open, an action which is dependant on which way that the door opens. When viewed from the outside, if the hinges are on the right, the door is right handed and the lock should be set accordingly, which means that the knob rotates clockwise to open. On a left handed door, the opening rotation of the knob would be anti clockwise. The process of changing the 'hand' differs according to the manufacturer, irrespective of this, its a straight forward and simple procedure that is well explained in the fitting instructions. A handy paper template that comes with each lock, takes away the need to measure the positions of the holes that need to be drilled. When taped onto the door, it pinpoints the exact location of each hole, as well as giving the diameter of the drill bit sizes. These holes correspond to the top and bottom fixing bolts, the holes for the spindle bar and the support post, all of which are drilled from the door face, straight through the door. The 25mm hole which is drilled into the door edge, is to accommodate the mortice latch, which is also positioned by the template. |
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