Adjusting The Off-Center Load; 3-Point Adjustment (Rough) - Sartorius Basic plus Service Manual

Basic Balances with laterally installed weighing systems (strain gauge
plus
0,1g resolution) and single-casting block systems (small): The diagram
at the left applies to Basic
plus
Example (BP 3100 S): Pos. 1 »
Pos. 2
Pos. 3
Pos. 4
Pos. 5
- Compare off-center load deviations with the tolerance values given in the
"Adjustment/Calibration Data Sheets for Basic
- If the values measured exceed the tolerance ranges, you will need to adjust
the off-center load.

Adjusting the Off-Center Load

Basic Balances with strain gauge system or single-casting block system
plus
(small):
Adjusting the off-center load requires special knowledge of the strain gauge
system, or of the single-casting block system (small) which cannot be described
in detail in this service manual. However, you can acquire the required
knowledge by attending the corresponding service training course on this
topic. For more information, please contact Sartorius AG in Goettingen,
Germany, or the Sartorius Training Center.
Basic Balances with Brass-System (small):
plus
- Remove the two stoppers (112) from the upper part of the balance housing
(110) (Basic Balance with brass-system (standard), with brass-system
plus
(analytical), or with brass-system (small)).

3-Point Adjustment (rough)

- Place the test weight on position A on the weighing pan; if the balance has
a draft shield, close the draft shield. Press »
- Place the test weight on positions B through C in sequence and write down
the values, with plus or minus sign, displayed at stability and with the draft
shield (if present) closed.
Basic Balances with diagonally installed weighing systems (brass-system
plus
(small):
Example (BP 210 S):Pos. A »
Pos. B
Pos. C
- Perform the adjustment only on the side with the greater deviation; in the
example given, this is "position B", corresponding to the off-center load
screw on the right.
- Change the setting of the screw in small increments; then check the off-
center load again at positions A, B and C. If necessary, re-adjust the
position of one of the off-center load screws.
SARTORIUS Basic
balances with rectangular weighing pans.
«
+ 0.12 g
+ 0.15 g
- 0.08 g
- 0.10 g
Balances".
plus
« to tare the balance.
«
+ 0.0018 g
- 0.0015 g
plus
0.00 g
0.0000 g
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