Guralp Systems Limited
PRC-EAM-0001

Chapter 3. The procedure

3.1 Prerequisites

Assemble the following equipment before commencing any work

Clean the outside of the instrument thoroughly using compressed air and/or alcohol before taking it into the clean work area, to prevent any dust from the casing entering the instrument.

3.2 Replacing the memory

The instrument lid is secured using a number of small screws located around the top, outside edge. The lid extends a short way down inside the cylindrical casing and two 'O'-rings provide sealing between the lid and the cylinder. The seal thus formed can make it difficult to remove the lid due to the differential pressure between the inside and the outside of the casing. A pressure-relief screw is provided for this reason - but see the Warning in the description below.

The instrument is now ready for testing.