Metrohm 7A501C Compliance Statement.July 2003

In 1965, The Factories Inspectorate in the U.K. issued to Edgcumbe Instruments Intrinsically Safe Certificate number 2148, for the Metrohm 7A501C. This approved the instrument as suitable for use as an insulation tester in gases and vapours classified as 2a and 2c in Table I of BS 1259:1958. ¨Intrinsically Safe¨ was permitted to be applied to the instrument, as defined in BS 1259:1958.

In the last 38 years there have been no accidents reported attributable to the use of a 7A501C in explosive atmospheres.

Martindale Electric Co Ltd acquired the product and all associated rights in 2003.

In order to preserve the relevance of the certification, Martindale Electric adheres to the same parts listings and construction techniques as those used by Edgcumbe in manufacture of the 7A501C.

Copies of I.S. Certificate 2148 are available upon customer request.

It should be noted that B.S.1259 was superceded by B.S.5501-9:1982 and more recently by both BS EN 50014:1998 and BS EN 50020:2002.

In addition, the ATEX 94 Directive now applies in certain countries to equipment used in explosive atmospheres and places a different interpretation on the term ¨Intrinsically Safe¨.

The 7A501C will not comply with the ATEX 94 Directive and is marked to this effect. We now supply the 7A501C as a Safety Insulation Tester.

Ongoing use of existing 7A501C testers in explosive atmospheres is permitted up to July 2006, but new purchases should be ATEX 94 compliant, if they are to be used where ATEX 94 applies.

To our knowledge, there is no ATEX 94 compliant insulation tester available.

In an environment where ATEX 94 applies, the purchase of a new 7A501C to carry out essential electrical safety tests should be subject to a risk analysis by the site safety officer.

Service replacements of key modules in existing instruments remains permitted.

For environments where the ATEX 94 Directive does not apply, the original certification and ¨Intrinsically Safe¨ marking remains valid.