G 76
CAP. 60]
Import and Export (Strategic Commodities) Regulations
[1988 Ed.
[Subsidiary]
IL 1532
IL 1533
Precision linear angular measuring systems, as follows and specially designed components and "specially designed software" therefor
(a) Contact-type systems or linear voltage differential transformers (LVDT) therefor, as follows:
(1) Contact type measuring systems having all of the following characteristics:
(i) Range equal to or less than 5 mm;
(ii) "Linearity" equal to or better than ±0.1 per cent; and
(iii) Drift equal to or less than 0.1 per cent per day at a standard ambient test room temperature ±1 K;
(2) Linear voltage differential transformers with no compensation networks and having either of the following characteristics:
Note:
(i) Range equal to or less than 5 mm; or
(ii) "Linearity" equal to or better than 0.2 per cent;
"Linearity" limits apply to measurements made in the static mode.
(b) Linear measuring machines having all of the following characteristics:
(1) Two or more axes;
(2) Range in any axis greater than 200 mm;
(3) "Accuracy" (including any compensation) better than ±0.0008 mm per any 300 mm segment of travel;
Note:
This sub-item does not embargo optical comparators.
(c) Angular measuring systems having an "accuracy" equal to or better than ±1 second of arc;
Note:
This sub-item does not embargo optical instruments, such as autocollimators, using collimated light to detect angular displacements of a mirror.
(d) Non-contact type measuring systems having, at a standard ambient test room temperature ±1 K, either of the following pairs of characteristics:
(1) Effective probe measurement diameter less than 0.5 mm and drift less than 0.5 per cent per day; or
(2) "Linearity" better than ±0.3 per cent and drift less than 0.5 per cent per day;
(e) Contact type measuring systems specially designed for combined, simultaneous linear-angular inspection of hemishells, having both the following characteristics:
(1) Linear "accuracy" equal to or better than ±0.005 mm in any 5 mm; and
(2) angular "accuracy" equal to or better than ±1 minute in any 90° of arc.
Technical Notes:
1. "Accuracy" is usually measured in terms of inaccuracy. It is defined as the maximum deviation, positive or negative, of an indicated value from an accepted standard or true value.
2. "Linearity" is usually measured in terms of non-linearity. It is defined as the maximum deviation of the actual characteristics (average of upscale and downscale readings), positive or negative, from a straight line so positioned as to equalise and minimize the maximum deviations.
Signal analyzers (including spectrum analyzers), with any of the following characteristics, and specially designed components, accessories and "specially designed software" therefor
(a) Non-programmable and capable of operating at frequencies over 12.5 GHz;
(b) Programmable and capable of operating at frequencies over 1 GHz;
(c) Having a display bandwidth in excess of 125 MHz,
(d) Incorporating:
(i) "User-accessible programmability"; and
(ii) A user-alterable "programme" and data storage of more than 8192 bit;