Chapter 2: Prerequisites
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3
Support, Vibration and Movement Requirements
At a minimum, the supporting structure usually consists of a base cabinet and
chemically resistant work surface.
XPert and XVS:
•
When setting up a chemical station not used for weighing powders, a
mobile stand or cart is allowable.
The ability for analytical balances to accommodate vibration varies with type
and brand. More advanced balances have improved reliability, however in
the preparation of a balance enclosure site, please consider the following:
•
Avoid tubular stands or carts that have the potential of moving when
touched.
•
Work surfaces should be of a thick rigid material that remains stable
when buttons are pressed. An epoxy benchtop or accessory work surface
is a minimum requirement.
•
A bench that is rigidly mounted to the floor or fixed to the wall, but not
both, may be appropriate.
•
The corners of a building typically have less vibration than the center.
•
The bench with the balance enclosure should not contain any vibration-
producing equipment, such as shakers or pumps.
•
Marble, granite or epoxy balance tables are generally recommended by
the manufacturers of analytical and microbalances. (See the installation
instructions in Chapter 3).
•
Marble slabs within the balance enclosure with dampening pads are also
an effective low cost means of controlling vibration.
Temperature Variation Requirements
XPert:
The extent the balance readings are influenced by temperature variations is a
function of the balance design. Most manufacturers would suggest that a
temperature drift of 1-2°C is generally tolerable. Only validation through
your Operational Qualification protocol can define what is acceptable. To
minimize the potential for temperature variations:
Summary of Contents for Protector XVS Series
Page 49: ...Chapter 7 Accessorizing your XPert or XVS Enclosure Product Service 1 800 522 7658 45...
Page 54: ...Appendix A Replacement Parts Product Service 1 800 522 7658 50...
Page 56: ...Appendix B Dimensions Product Service 1 800 522 7658 52 2 3 and 4 Units...
Page 57: ...Appendix B Dimensions Product Service 1 800 522 7658 53 2 3 and 4 Units...
Page 58: ...Appendix B Dimensions Product Service 1 800 522 7658 54...
