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MaintenanceMaintenance
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Periodic inspections
Perform regular inspections (once per year, etc.). It is necessary for regular inspections to be carried
out stringently for all elements, including performance and functions. It is also possible for a calibration
certificate containing the JCSS logo to be issued for areas of uncertainty. It is recommended that
you request a Shimadzu service agent to carry out the actual inspections. See the Shimadzu website
(https://www.shimadzu.com/an/balance/index.html) for further details.
An overview is given below.
Overview of Periodic inspection [Reference Example]
Frequency of
inspection
Once a year
Inspection timing Any day during the established month
Method of inspection Check for abnormalities in the following functions and external appearance.
• Display panel
• Menu operation keys / operation keys
• Pan
• Level
Check the following aspects of performance.
• Repeatability: Weigh a weight that corresponds to approximately half of the weighing capacity of the
balance five to ten times and assess the dispersion in the weight readings obtained.
• Eccentric error: Assess the difference in the weight readings obtained when a weight corresponding
to one third to half of the weighing capacity of the balance is placed in the center of the pan and at a
position shifted from the center by a specified distance.
• Instrumental error: Decide on four or more observation points and assess the difference between the
values obtained when weights corresponding to these points are weighed on the balance and the
actual weight values of the weights.
Criterion of judgment Users are required to determine the criterion of judgment as a basic principle in accordance with the
installation environment and required level of accuracy. For example, the general judgment criterion is
the value actually measured with the balance with the required level of accuracy set within +/-5 of the
final digit.
Equipped with a menu to support the Periodic inspections listed above.
^ [Performing Periodic inspections] (P.55)
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