BS 3042-1971 pdf download.STANDARD TEST FINGERS AND PROBES.
2.4 Test blade. The Test blade shall be constructed according to the details and dimensions given in Fig. 9. The handle shall be of insulating material. The blade itself shall be of any suitable metal,
2.5 Test probe. The Test probe shall be constructed according to the details and dimensions given in Fig. 10. The probe shall be of any suitable material.
2.6 Test rods. The Test rods shall be constructed according to the details and dimensions given in Figs. II and 12 as follows: . Test rod I, Fig, 11 Test rod II, Fig.12. They shall be of wood or other suitable material. For ease of manipulation a handle of smaller diameter may be provided. .
2.7 Test chain. The Test chain shall be of any suitable metal, and shall bave a diameter of 2 mm. It shall consist of small links and be of the endless type. In use the chain shall be arranged to take up the form shown in Fig. 13, unless otherwise specified, A more detailed specification is under consideration.
2.8 Test hook. The Test hook shall be of steel and shall have the dimensions and shape shown in Fig. 14.
2.9 Test ball. The Test ball shall be of any suitable metal and shall be of the dimensions shown in Fig.15. A ball as used in a standard ball bearing is suitable.
2.10 Test cone. The Test cone shall be of wood or other suitable material and shall be constructed according to the details and dimensions given in Fig. 16.
2.11 Accessibility probes. The accessibility probes shall be manufactured from rigid material. The dimensions of the probes shall be those given in Fig.17 for Probe A or Probe B as appropriate. The tolerance on dimensions shall be土0.125 mm.'
3.3 Test fnger II. The Test finger II is intended to be used in the same manner as Test finger I, but for checking the inaccessability of moving parts (see also Note 2 below), The possibility of using Test finger I in place of this finger should be considered. NOTE 1. It has been agreed by CEE that this finger should be used as the standard test finger in testing for mechanical hazard. Its use has also been agreed by IEC and by the CEE (for telcommunications equipment) as a standard test finger in testing for protection against electric shock. NOTE2. Test finger II does not meet the recommendations ofBS 5304 (see 3.5, Test finger IV). H.M. Factory Inspectorate consider that Test finger II docs not give the degree of protection necessary to comply with Section 14 of the Factories Act 1961 and Section 17 of the Ofices, Shops and Railway Premises Act 1963, i.e. to prevent access to dangerous parts. (See Test finger IV.)BS 3042 pdf download.