VA9208-GGx-x Series Proportional Electric Spring Return Valve Actuators Installation Instructions
12
Calibration (CAL) Function
The CAL function enables the actuator to redefine the
selected input signal range proportionally across a
reduced rotation range. The actuator maintains
calibration when power is lost or removed.
Follow these steps to calibrate the input signal range:
1.
With power applied to the actuator, move the mode
selection switch to the CAL position and leave it in
this position for approximately 5 seconds. The
actuator begins rotating until the end-stops are
found.
2.
Move the mode selection switch to the desired
input signal range. Selection can be made while
the calibration process is in progress, or after it is
complete. The selected input signal is
proportionally reconfigured to the reduced rotation
range.
Note:
During normal operation, if the actuator
stroke increases due to seal or seat wear, input
signals are automatically reconfigured to the
increased rotation range in approximately 0.5°
increments.
3.
If the actuator mounting position is changed or if
the linkage is adjusted, repeat Step 1 and Step 2 to
repeat the CAL function.
Note:
The mode selection switch must remain out
of the CAL position for at least 2 seconds before
re-initiating the CAL function.
Note:
If the mode selection switch is left in the
CAL position, the actuator defaults to 0-10 V input
signal range, DA.
Auxiliary Switch (VA9208-xxC-3 Models)
The VA9208-xxC-3 models include two integral
auxiliary switches with a switch adjuster accessible on
either face of the actuator (Figure 5). The factory
setting for Auxiliary Switch No. 1 is 83% closing, and
the nominal setting for Auxiliary Switch No. 2 is 10%
opening (relative to the 0 to 100% rotation range as
printed on the product label). See the
table for the auxiliary switch ratings.
The switch point of Auxiliary Switch No. 1 is fixed. The
switch point of Auxiliary Switch No. 2 is independently
and continuously adjustable from 74 to 5% position.
For the most accurate switch positioning, see Figure 25
and use the method in the following example. To
change the switch point of Auxiliary Switch No. 2,
proceed as follows:
1.
Position the actuator in the full spring return
position.
Note:
The switch is factory set to trip when the
actuator reaches the 10% position.
!
WARNING: Risk of Electric Shock and
Property Damage.
Insulate and secure each unused wire
lead before applying power to the
actuator. Failure to insulate and secure
each unused wire lead may result in
property damage, electric shock, and
severe personal injury or death.
AVERTISSEMENT : Risque de
décharge électrique et dégâts
matériels.
Isoler et protéger chaque fil non utilisé
avant de mettre l'actuator sous tension.
Le non-respect de cette obligation
d'isolation et de protection de chaque fil
non utilisé risque d'entraîner des dégâts
matériels, des décharges électriques et
des blessures graves, voire mortelles.
