Parker Controller Family Manual De Uso página 91

Calibration of starting value (0 or 4 mA) for the analogue
FroM
output.
This can be set from 0 to nominal device pressure.
Example for AnA = 0-20:
0000 = at 0 bar the analogue output yields 4 mA.
The starting value is always lower than the end value.
If the starting value is set higher than the end value, the start-
ing value will automatically be reset to a value that is 0.5% of
the nominal device pressure lower than the end value. The
warning message Att (Attention) appears, which can then be
cleared by pressing Enter
Calibration of the end value (20 mA) for the analogue output.
to
This can be set from 0 to nominal device pressure.
0010 = at 10 bar the analogue output yields 20 mA.
Zero point calibration: The current pressure is stored as a new
OSEt
zero point. For safety reasons, this is limited to a value that is
±5% of the nominal device pressure.
An application example is a system with a continuous residual
pressure that should be shown as zero bar:
OFF = factory calibration
YES = begin zero point calibration now
no = return to menu, do not make new zero point calibration
After the zero point calibration, pressure up to 20 bar can be
shown as 0 bar on a 400 bar pressure switch. For that reason,
it is important to establish that there is no pressure before
starting work on a system.
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