9
SARTORIUS Basic
plus
Semimicro-Balances
Checking the Metrological Specifications
Prerequisites to be met before checking the metrological specifications.
Place of installation
– room with constant ambient temperature (± 0,5 K)
– solid, level surface that is free of vibrations
– no direct heat exposure (sun, heater, etc.)
– no drafts
Getting started
– Level the balance using the level indicator
– Turn the balance on and allow it to warm up for at least 6 hours.
Test Weights
The span of the balance may be tested only with calibrated weights for
which a calibration certificate has been issued. Always make sure that the
individual weights are traceable to a national standard.
The calibration and verification certificates must show the nominal mass
value, the deviation from the nominal mass value, as well as the uncertainty
of measurement for each weight. The nominal mass value and the deviation
from this value can be added to obtain the exact weight value (conventional
mass) of each weight.
Testing
Testing must be carried out according to the following Standard Operating
Procedure for Testing and in the order given. The test results must be written
on the Balance Test Record designed for this purpose (WKD-038-1/09.96).
Standard Operating Procedure for Testing
Checking the Reproducebility (Standard Deviation)
Test weights: (E2 - individual weights, nominal mass value)
(See »Table od Adjustment Data« Page21).
Test Procedure (Weighing)
1) Unload and zero the balance.
2) Center the test weight on the weighing pan.
3) Write down the weight displayed on the Balance Test Record.
4) Repeat steps 1) to 3) fife times.
To Next Page
Loading...
