AUMA SA 07.1 - SA 30.1, Руководство по эксплуатации

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21.4 Positioner adjustment for end position OPEN (standard version)
.
Run multi-turn actuator by pressing push button (local controls) to
end position OPEN .
.
Connect voltmeter to measuring points MP2 and MP1 for measuring the
actual value E2:
When position feedback is set correctly, the voltmeter shows 5 V.
If measured value is not correct:
Adjust position feedback according to clause 16. and 17. and repeat
“positioner adjustment”.
.
Connect max. command signal (nominal value E1) = 20 mA.
.
Connect voltmeter to measuring points MP4 and MP3 for measuring the
nominal value E1:
For a nominal value of 20 mA, the voltmeter shows 5 V.
If measured value is not 5 V:
Check the externally supplied command signal E1.
21.5 Setting the sensitivity
.
Set selector switch at the local controls to position REMOTE.
.
Set command signal E1 according to label on cover plate (see figure 50).
The sensitivity (
D
E/dead band) is set to maximum value (2.5 %) in the fac-
tory.
.
The deadband can be increased by turning the potentiometer
D
E (P9)
clockwise. Left stop = small dead band (= high sensitivity). For a precise
setting of the dead band, a set point device with setting options in the 0.1
mA range is required.
.
A better sensitivity (
D
E
min
= 0.25 %) can be achieved by turning the poten-
tiometer P7 (sens) clockwise.
When setting
D
E, the following must be observed:
If the number of starts is too high, this will lead to unneces-
sary wear at the valve and actuator. Therefore the maximum
possible dead band acceptable for the process must be set.
To prevent exceeding the max. permissible number of starts (refer to Techni-
cal data sheets for modulating actuators) in extreme cases, a pause time
between 0.5 s (left stop) and 10s (right stop) may be set with the potentio-
meter “t-off” (P10).
39
Multi-turn actuators SA 07.1 – SA 30.1/SAR 07.1 – SAR 30.1
Operation instructions with actuator controls AUMA MATIC AM 01.1/AM 02.1
If
LED display:
(refer to figures 49 and 50)
Then
Required setting in end position OPEN:
(refer to figures 49 and 50)
the LEDs are not illuminated
Turn potentiometer “max.” (P4) slightly counterclockwise until
LED
(V28 green) is illuminated
LED (V28 green)
is illuminated
Turn potentiometer “max” (P4) clockwise until LED (V28 green)
is no longer illuminated.
Then turn potentiometer “max” (P4) slightly counterclockwise until
LED
(V28 green) is illuminated
LED (V27 yellow)
is illuminated
Turn potentiometer “max” (P4) slightly counterclockwise until
LED
(V27 yellow) is no longer illuminated and
LED (V28 green) is illuminated
Table 9