Site requirements
Chapter 2
Zetasizer Nano Essentials
Page 2-5
General requirements
The following requirements apply to all countries:
The power cord must be approved by an acceptable accredited agency respon-
sible for evaluation in the country where the power cord set will be installed.
The power cord set must have a minimum current capacity of 10A (7A in Japan
only) and a nominal voltage rating of 125 or 250 volts AC, as required by each
country's power system.
The area of the wire must be a minimum of 0.75mm
2
or 18AWG, and the
length of the cord must be less than 3m.
The power cord must be routed so it will not be walked on, pinched by items
placed on or against it, or become wet. Pay particular attention to the plug, the
electrical outlet and the point where the cord exits the product.
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.
The purge inlet port can be used to connect a dry air supply to the instrument, 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. The air
supply must conform to the following specification:
Compressed air to DIN 8573-1
Oil = Class 1
Water = Class 3
Particulate = Class 3
Pressure = 100 kPa g
For connection purposes, the purge connection uses an M5 internal thread.
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.
Man0382-5.0 (Zetasizer Nano Essentials).book Page 5 Wednesday, December 2, 2009 12:06 PM
