Intrinsic Safety Rules OK for Process Instrumentation (Part 2)

Wheeler R. V. 1915. “Battery-Bell Signalling Systems as regards the danger of ignition of firedamp-air mixtures by the break-flash at the signal-wires”, Home Office Experimental Station Report, January, HMSO, London.

Wheeler R. V. Thornton W. M. 1916. “Electric Signalling with Bare Wires so far as regards the danger of ignition of inflammable gaseous mixtures by the break-flash at the signal wires”, Home Office Experimental Station Report, 1 June, HMSO, London.

“Certificate of test of electrical apparatus in inflammable atmosphere, No. 2”: 1936. Evershed-Midworth Distant Repeater, for mixtures of coke-oven gas and air, HM Chief Inspector of Factories, 16 August (Certificate No. 1 appears not to have been issued).

“Intrinsically Safe Electrical Apparatus and Circuits for Use in Explosive Atmospheres”, BS 1259: 1958, British Standards Institution, London.

“National Electrical Code, 1956 Edition”, National Fire Protection Association, Boston.

“Intrinsically safe and non-incendive electrical instruments”, Recommended Practice ISA RP12.2: 1965, Instrument Society of America, Pittsburgh.

“The Design of Instrument & Control Equipment for use in Explosive Environments”, 1961. Northampton College of Advanced Technology, London Summer School, 5–9 June.

Swartwout C. J. Maltby F. L. “Intrinsic Safety”, 1963. Instruments and Control Systems, 36 (1), October.

“Intrinsic Safety and its Application to Process Instrumentation”, 1966. Engineering Report No. 201A, Motorola Instrumentation and Control Inc.

“Electrical apparatus for explosive gas atmospheres, Part 11: Construction and test of intrinsically-safe and associated apparatus”, IEC Standard 79–11: 1976, International Electrotechnical Commission, Geneva.

“Electrical apparatus for potentially explosive atmospheres, Intrinsic safety ‘i'”, CENELEC Standard EN50 020, March 1977, Brussels; and BS 5501: Part 7: 1977, London.

“Intrinsically Safe Apparatus and Associated Apparatus for use in Class I, II and III Division 1, Hazardous Locations”, 1979. Approval Standard Class Number 3610, October, Factory Mutual Research Corporation.

Hutcheon I. C. , “Switch transfer units for hazardous areas offer two modes of earth fault protection” 1980. IFIP/IFAC Symposium, Trondheim, June.

“A user's guide to intrinsic safety”, 1977. Application Note No. AN 9003–2, January, Measurement Technology Ltd., Luton.

“Simple facts on safety barriers”, 1979. Application Note No. AN 9006–1, August, Measurement Technology Ltd., Luton.

“List of all MTL Technical Papers and Application Notes” 1982. TP 1002–3, January, Measurement Technology Ltd., Luton.