10
A set of
operational documents
contains data on design, principles of operation,
properties of the device and its components. It also contains instructions on correct and safe
device operation and evaluation of its technical condition when deciding whether it is necessary
to send it for repairs.
The device is designed as a compact unit for desktop use. The general view of the device
is given in Figure 1.
Figure 1
1 — MOV USB device, 2 — USB-cable, 3 — PC (laptop).
Means of Measurement, Tools and Accessories
The device belongs to indicating (not measuring) equipment. Therefore control of device
operation is carried out using test-objects, simulating several known methods of number
alteration (cold calking, sealing with fusible metals, dot welding and pressing-in fragments).
See paragraph 2.2.1.2 for the details of the device operational check-up using the test-object.
Test-object specifications
The test-object (see Figure 2) imitates an examined object. It is a plate (unkilled sheet
steel) with the thickness of 0,8–0,9 mm bearing “291634” original number applied by mechanic
pressing (cold stamping). The original number details: manual stamping with the use of “font
No.6” stamping set and a hammer on a massive anvil. The depth of digit relief is about 0,3–
0,4 mm.
Three digits of the original number were modified: “9” to “0”, “6” to “9” and “4” to “5”.
Thus, the altered number appears as “201935” (altered digits are underlined).
Digit “9” of the original number was altered manually using
cold calking
of one element
(crosspiece) of digit “9” with the help of bench tools. Then digit “0” was stamped over
the remaining contour of digit “9”.
1.1.5
1
2
3
Summary of Contents for 7517A
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