Digi DS-470, Operation Manual

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7.1.3 Continued
b. Accuracy
Weighing: The scale weighing accuracy can be determined by
applying various known weights to the platform. Because of the
scale's very high accuracy, only weights that are certifiably more
accurate than the scale's specifications should be used in testing
for accuracy. (NBS class "F" or higher)
Since the scale owner does not normally have such certifiable
weights available to him, it is suggested that the customer call
their authorized
DIGI dealer.
7.2. Service & Repair
No service or repair should be attempted except by qualified personnel, and
not until it has been positively determined that the counting scale requires
such service. All service should be done in a clean, dry, dust-proof area.
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