5-Point Adjustment (Fine) - Sartorius Basic plus Service Manual

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5-Point Adjustment (fine)

- Place the test weight on position 1 on the weighing pan; if the balance has
a draft shield, close the draft shield. Press »
- Place the test weight on positions 2 through 3 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. 1 »
Pos. 2
Pos. 3
- Perform the adjustment only on the side with the greater deviation; in the
example given, this is "position 2," 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 1, 2 and 3. If necessary, re-adjust the
position of one of the off-center load screws.
- If the off-center load on the sides (pos. 2 and 3 ) is within the tolerance
range, then the off-center load at the front and back (pos. 4 and 5) must be
adjusted.
- Place the test weight on position 1 on the weighing pan; if the balance has
a draft shield, close the draft shield. Press »
- Place the test weight on positions 4 and 5 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. 1 »
Pos. 4
Pos. 5
- Perform each adjust on both sides, i.e. change the positions of both of the
off-center load screws by the same amount and in the same direction.
- Change the setting of the screw in small increments; then check the off-
center load again at positions 1, 4 and 5. If necessary, re-adjust the
position of one of the off-center load screws.
- If the measured values now lie within the tolerance range, please check the
off-center load at all 5 positions one more time, just to be certain.
- After completing the off-center load adjustment, replace the stoppers (112)
in the upper part of the balance housing (110) (Basic
brass-system (standard), with brass-system (analytical), or with brass system
(small) ).
« to tare the balance.
«
+ 0.0008 g
- 0.0005 g
« to tare the balance.
«
+ 0.0006 g
- 0.0004 g
Balances with
plus
0.0000 g
0.0000 g