Offset Adjustment; Span Adjustment - Asco JOUCOMATIC SENTRONIC 601 Série Manuel D'installation

OFFSET ADJUSTMENT (potentiometer P2)
Example 1: To set an output vacuum or relative pressure to -50 mbar at 0 volt setpoint. Apply 0 volt and
turn potentiometer P2 in clockwise to obtain -50 mbar (see adjustment precaution below).
Example 2: For a 2 volt setpoint, output pressure should be 0 bar.
Apply 2 volts setting and turn potentiometer P2 counterclockwise to obtain 0 bar.
Offset adjustment: potentiometer P2
5 V
10 mA
0
SHUT
OFF
VACUUM
(-1 bar)
Turn
potentiometer
clockwise
WARNING :
!
If you turn the potentiometer P2 in clockwise, the maximum adjustment is to 5 % (5V).
SPAN ADJUSTMENT (potentiometer P1)
Example: Valve adjustment with vacuum (-1 bar).
For a setting range of 0-10 volts, the desired output pressure range should be 0 ...-0.8 bar:
Apply 10 volt setting and turn potentiometer P1 counterclockwise to obtain an output pres-
sure of -0.8 bar.
Span adjustment: potentiometer P1
0
-500 mbar
-1 bar
The maximum possible adjustment of the span is 100%. To obtain a vacuum (span 100%), there must be
a potential difference of at least 10 volts (voltage setting) or 20 mA (current setting).
You can only reduce the negative pressure (vacuum).
10 V
20 mA
Turn potentiometer
counterclockwise
10 V
20 mA
Turn potentiometer clockwise
Turn potentiometer counterclockwise
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