Ashcroft B7 series, Installation And Maintenance Manual

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1 General remarks
1.1 Purpose of this Manual
This Operating Manual contains fundamental and essential advice to be followed for the installation, operation and
servicing of the device. It must be read without fail before assembly and start-up of the device by the fitter, the
operator and the specialist personnel responsible for the device. This Operating Manual must be available at the point
of use at all times.
The following sections about general safety information (2) and also the following specific advice regarding the
intended purposes (2.2) and through to disposal (11.3) contain important safety information which, if not followed, may
result in risks for people and animals, or to property and buildings.
1.2 Symbols
Warning!
This indicates a possibly hazardous situation where failing to follow advice may result in risks to people,
animals, the environment and buildings.
Information!
This emphasizes key information for efficient, fault-free operation.
1.3 Limits of liability
Failure to respect this safety information, the envisaged uses or the limit values relating to use indicated in the
technical data for the device may result in risk or to injury to people, the environment or the plant.
Claims for compensation for damage against the device supplier are excluded in such an eventuality.
1.4 Copyright
This Operating Manual may only be copied and passed on as a complete document without the special permission of
the publisher.
1.5 Warranty
For the product described here, we offer a warranty pursuant to Section 6 Guarantee in Respect of Defects in our
General Terms and Conditions of Delivery and Payment.
1.6 Manufacturer’s address, customer services
Ashcroft Instruments GmbH
Max-Planck-Strasse 1
D-52499 Baesweiler. Germany
Tel.: +49 (0) 2401/808-888
Fax.: +49 (0) 2401/808-999
E-mail: customer.service@ashcroft.com
Web: www.ashcroft.eu
2 Safety
2.1 General sources of hazards
Pressure and temperature switches are generally a constituent part of a control and measurement system Pressure
switches are pressurized parts where failure can result in hazardous situations. The selection of switches should be
made in accordance with the applicable standards, regulations and engineering practice.
The devices are only to be used for the intended purpose as described by the manufacturer.
The devices are precision built agency approved control device which features a mechanical snap action switch.
Controllers are available for operation on pressure or vacuum (B7), differential pressure (D7) or temperature (T7) with
fixed differential.
The integrated switching elements are SPDT micro switches, in case if intrinsically safe operation supplied by isolating
switch amplifiers with certified intrinsically safe power circuits. If the set limit values are exceeded, the output circuits
are opened or closed.