Adjusting The Linearity - Sartorius Portable Series Service Manual

Linearity Data
Balance/Scale Type
PT120 - 000V1
PT120 - 000V103
PT210 - 000V1
PT600 - 000V1
PT1200 - 000V1
PT2100 - 000V1
PT6 - 000V1
GT210 - G00V1
GT600 - G00V1
GT1000B - G00V1
GT2100 - G00V1

Adjusting the Linearity

Note:
With the PT...-000V1 and GT...-G00V1 balances, negative linearity errors can be corrected with resistor R104, and
positive linearity errors can be corrected with resistor R105.
The linearity error is determined from the following equation:
Linearity error = actual value – set value
Definition:
The actual value thereby corresponds to the value indicated by the balance at half-load, and
the set value corresponds to one-half of the value indicated by the balance at full load.
20
Weighing Capacity
120 g
120 g
200 g
600 g
1200 g
2000 g
6000 g
200 g
600 g
1000 g
2000 g
- Open the balance/scale housing (see page 14).
- Locate the position of balancing resistors R104 and R105 on the main PCB
(118) (see „Overview of the Test Points" on page 31).
- Desolder resistor R104 or R105.
- Connect the balance/scale to the power source.
- Calibrate the balance/scale in the gross value mode (see page 24).
Linearity
<=± 0,01 g
<=± 0,01 g
<=± 0,01 g
<=± 0,1 g
<=± 0,1 g
<=± 0,1 g
<=± 1 g
<=± 0,01 g
<=± 0,1 g
<=± 0,1 g
<=± 0,1 g