Altana Pendulum Hardness Tester Manual Manual de usuario descargar pdf (Pagina 17)

Adjustment for König

6. Adjustment for König

6.1. Standards

ASTM D 4366

DIN EN ISO 1522

Pendulum and light barrier are adjusted at

delivery. A periodical recertiﬁ cation by authorized

service personal is recommended for equipment

monitoring.

6.2. Duration of pendulum oscillation

According to the Standard one pendulum

oscillation is speciﬁ ed with 1.4 s ± 0.02 s. This

value can be veriﬁ ed by the following procedure:

• Mount the wire release at 6 °

• Raise the lifting table to the stop and check the

zero position.

• Move the pendulum to 6 ° position and ﬁ x it

with the wire release. Press start button.

• Release pendulum

• Repeat the procedure with the 3° osc. mode. .

After 100 oscillations the elapsed time must be

140 + 2s. If not, please call a service technician

for adjusting.

6.3. Damping time

The damping time is the change of oscillations

from 6° to 3°.The damping time from 6° to 3° must

be 250 ± 10s on the glass plate (for tolerance

please check actual version of the standards.)´This

can be veriﬁ ed with the following procedure:

• Level the instrument with the positioning feet

exactly horizontally control of the bubble level.

• Move the pendulum to 6° position and hold it

with the wire release.

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Altana Pendulum Hardness Tester Manual Manual de usuario Pagina 17