Calibration Instructions - fetra 2122 Mode D'emploi

10. Calibration instructions

The indicator offers the possibility to enter a maximum of three calibration points (mul-
tiple point calibration). The advantage is that even weighing systems with bad hysteresis
can be calibrated within specifications.
Since these instructions are often used in the field, where it is difficult to calibrate various
points, we will start with the explanation of single point calibration.
POSSIBILITIES
There are two different ways to calibrate the system. In both cases a zero calibration
should be performed before the calibration takes place.
1. Two point calibration (calibration weight 1000kg to 1500kg). This is a zero calibration
and 1 weight calibration at about 50% to 75% of the capacity of the weighing system.
2. Multi-point calibration for weighing systems with accuracy problems (calibration
weights about 200kg, 1000kg and 1500kg) This is a zero calibration + three weight
calibrations at about 10%, 50% and 75% of the capacity of the weighing system..
DEFINING ZERO
Unload the system. Switch the system on. Lift the weighing system by pumping the
handle twice. The weighing system is not underneath anything is standing completely
free.
• Push the key for about 9 seconds until the screen changes, then release the key.
The weighing system shows several settings. The zero calibrations is completed and
the weighing system will return to standard weighing mode.
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