Malvern Instruments Zetasizer uV, Manual, Page: 18 / 30

Chapter 2 Site requirements
Page 2-6 MAN 0429
Additional services
Purge specification
If measuring samples at low temperatures there is a risk of condensation occurring
on the cell; this occurs when the measurement temperature is less than the ‘dew
point’ of the ambient air surrounding the cell being measured. This is particularly
likely in humid climates.
If this may be a problem the purge inlet port can be used to connect a dry air supply
i.e. a supply with a dew point below the target temperature. This removes any
moisture in the air immediately surrounding the cell and prevents condensation. If
using the purge inlet connector, the air or Nitrogen supply must conform to this
specification:
„
Compressed air to DIN 8573-1
„
Oil = Class 1
„
Water = Class 3
„
Particulate = Class 3
„
Pressure = 100 kPa g
Caution!
The purge air line supply must conform to the above specification. Failure
to meet this specification may result in permanent damage to the instru-
ment and invalidate the warranty.
Telephone socket specification
The telephone socket for remote support needs a direct Internet connection.
Laser safety
Zetasizer μ V instruments are Class 1 laser products and as such, require no special
laser safety considerations during normal operation. However, during servicing
(which must be performed by a qualified Malvern representative), the servicing
engineer may be exposed to class 3b or above laser radiation. We therefore recom-
mend that the administrative controls recommendations of the Laser Safety Regu-
lations (IEC 60825-1(1993) +A1(1997)+A2(2001) are implemented.
Man0429-1.0 (Zetasizer uV Essentials).book Page 6 Friday, December 19, 2008 9:32 AM