Sartorius Basicplus Manual page 11

Checking the Off-Center Loading Tolerances
Test weights: (E2 - individual weights, nominal values)
(See »Table of Adjustment Data « Page 21).
Test Procedure (Weighing)
1) Center the test weight on the weighing pan and tare the balance.
2) In the order given in the Balance Test Record, place the test weight in
each of the off-center positions indicated and write down the weight on
the Balance Test Record.
3) Repeat steps 1) and 2) for all off-center loading positions.
Evaluating the Test Results:
The value obtained for each off-center loading position must be within the
off-center loading tolerances given in the Service Specifications Sheet.
If the off-center loading error is too large, adjust the balance so that the off-
center loading error is within the tolerances specified.
Checking the Internal Span Adjustment
Test Weights: (E2 - individual weights, calibrated)
(See »Table of Adjustment Data « page21).
Test Procedure
Write down the permissible tolerance of the span on the Balance Test Record
(Please refer to the Service Specifications Sheet).
On the Balance Test Record, write down in the nominal mass value, the
deviation from the nominal mass value and the uncertainty of the test weight
you are using. If you are using serveral weights, write down the sum (Please
refer to the calibration certificate of your weight set).
Calculate the conventional mass M of the test weight:
W = nominal mass value P + deviation D of the test weight (Be sure to write
down the plus or minus sign!)
Write down the conventional mass M on the Balance Test Record.
Calculate the sum SU.
SU = permissible tolerance T of the span + uncertainty U of the test weight.
Write down the sum SU on the Balance Test Record.
Test Procedure (Weighing)
1) Unload and tare the balance.
2) Perform an internal span adjustment (press the F1 key).
3) Center the test weight on the weighing pan.
4) Write down the displayed value on the Balance Test Record.
5) Repeat steps 1) to 4) twice.
SARTORIUS Basic plus
Semimicro-Balances
11