15.5 Positioner adjustment end
position OPEN
.
Run multi-turn actuator by depressing push-button
(local controls) to
end position OPEN.
.
Measure 5 V at measuring points M4 and M3. (Figure T1).
If measured value is not correct: Perform feedback adjustment according
to page 14 clause 12, or page 15 clause 13 and continue with page 21
subclause 15.4.
.
Connect max. command signal E1 = 20 mA.
.
Measure 5 V at measuring points M1 and M2. (Figure T1)
If measured value is not 5 V, check the externally supplied command
signal.
15.6 Setting of the sensitivity
.
Set selector switch to position II (REMOTE) at local controls (figure P,
page 18).
.
Supply command signal to any value between 0/4 and 20 mA.
.
Set dead band with potentiometer
∆
E (P9) so that multi-turn actuator does
not readjust after a single control operation:
- turning clockwise results in reduced sensitivity (dead band increased)
When setting E the following must be observed by all
means:
If the number of starts is too high, this can lead to
unnecessary wear at the valve and actuator. Therefore the
highest possible sensitivity (dead band) which is permitted
for the process must be set.
.
To prevent an exceeding of the max. permissible number of starts
(1 500 c/h) in extreme cases, a time delay between 0,5 s (left stop) and
10s (right stop) may be set with potentiometer t-off (R88).
22
Multi-turn actuators SARV 07.1 - SARV 10.1
AUMA VARIOMATIC
Operation instructions
If
LED indications:
(refer to figures T1 and T2)
Then
Required setting in end position OPEN:
(refer to figures T1 and T2)
LED's are not illuminated
Turn potentiometer „max” (R28) slightly counter-clockwise until
LED
(V24 green) lights up.
LED
(V24 green) is
illuminated
Turn potentiometer „max” (R28) clockwise until LED (V24)
goes out.
Then turn potentiometer „max” (R28) slightly counter-clockwise until
LED
(V24) lights up again.
LED
(V23 yellow) is
illuminated
Turn potentiometer „max” (R28) slightly counter-clockwise until
LED
(V23) goes out and LED
(V24 green) lights up.
R28
R25
R31
R35
V24
STELLZEIT
OPERATING
TIME
ENABLE
FREIGABE
READY
BEREIT
V23
V35
V37
R88
J
-
+
Bild T2: Cover plate positioner
R2
8
R2
5
R3
1
R3
5
M4
M3
M2
M1
E1
Mess-
punkte
{
S3
S2
V24
V23
V35
V37
R88
E2
{
Figure T1: Positioner board
