7 MAINTENANCE & SERVICING
When the pipe e is not in use it should be stored in an
upright posi on. The pipe e should be inspected prior to use each
day for any dust or contamina on on outside surfaces. Special
a en on should be given to the p cone. No solvent other than
isopropanol should be used to clean the pipe e. If the pipe e is
used daily, an internal parts inspec
ti
on should be performed
every three (3) months.
7.1 DISASSEMBLY
The servicing procedure starts with the disassembly of the pipe e.
Please refer to the spare parts lists for be er understanding of the
components.
7.2 DISASSEMBLING THE LOWER PART
1.
Press p ejector pusher completely down and hold.
2.
Pull down the p ejector and release the p ejector pusher.
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•
Calculate the inaccuracy and imprecision for all three
volumes as per EN ISO 8655-6 standards on the basis of the
following calcula on
6.3.1 CONVERSION OF WEIGHT READINGS TO VOLUME
Mean Volume
Mean Weight
Balance Reading
number of reading
Conversion factor
[example Z=1.0040 µl/mg at 25°C and 1013 hPa]
Mean Value
Particular volume at which readings are taken
S = Standard Deviation
n = number of readings
S=
V = Mean Value
i=1
n
∑ ( Vi - V)
2
n - 1
CV% = 100 · S
_
V
Compare the results to the
limits in the earlier tables (Page
)
# 4, 5
6.3.2 CALCULATION FOR IN-ACCURACY (SYSTEMATIC ERROR)
6.3.3 CALCULATION FOR IMPRECISION (RANDOM ERROR)
