Bettis Installation Instructions: Switch Adjustment: QC41, QC42 QC43 | Bettis Manuals & Guides
Switch Adjustment Instruction QC41, QC42 and QC43 Module Q-series
DOC.SAI.QC4X.EN Rev. 0 July 2015
Setting the switch points from factory
settings to a more accurate setting.
• Use these instructions when a more accurate setting of the
switch points is required after receiving the module from the
manufacturing site.
Factory setting of
switch points
±15°
±15°
90°
To more accurate setting of
switch points
90°
±4°
±4°
• Make pneumatic and electrical connections before adjusting
the limit switch setting. See chapter 3 and 4 of QC40 Installation guide.
4
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1
15
11
12
D
Shield screw:
Cross slotted Phillips
nr. PH2
• Remove main round cover (15) and loosen the screw (11) of the
shield (12) and turn the shield down.
2
Closed Position:
• Move the actuator/valve assembly to the closed position.
Close
3
Closed Position:
• Turn top screw (10) counter clock wise (do not force the adjust-
• For normal double acting or spring return modules, remove the
control signal from pilot valve terminal 8 and 9.
• In case of a double acting “Fail-in-Last-Position” module, apply a
control signal to terminal 11 and 12 and remove the control signal
from terminal 8 and 9.
5 6 7
Open
10
Adjustment screws
Ω
0.6 x 3.5 or
Cross slotted Phillips
nr. PH2
ment screw) until the switch trips to the “off state” (no signal)..
10
Ω
Closed Position:
• Turn top screw (10) clock wise (do not force the adjustment
screw) until the switch trips to the “on state”.
• This position represents the actual, mechanical “closed” position
of the valve.
Closed Position:
• Turn the screw minimal a 1/2 turn clock wise. The “closed” posi-
Preliminary Field Trial Documentation
8 9
9
Ω
tion switch point is now set.
Ω
Ω
1/2 turn
1/2 turn
10
9
Open Position:
Preliminary Field Trial Documentation
• Move the actuator/valve assembly to the open position.
• For normal double acting or spring return modules, apply the
control signal to pilot valve terminal 8 and 9.
• In case of a double acting “Fail-in-Last-Position” module, remove
the control signal to terminal 11 and 12 and apply the control
signal to terminal 8 and 9.
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10
15
11
12
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9
Adjustment screws
Ω
0.6 x 3.5 or
Cross slotted Phillips
nr. PH2
Open Position:
• Turn bottom screw (9) clock wise (do not force the adjustment
screw) until the switch trips to the “off state” (no signal).
CAUTION: DO NOT FORCE THE ADJUSTMENT
SCREWS (9 & 10) WHEN RESISTANCE IS FELT.
During adjustment there are three situations that can damage the
adjustment screw head and internal mechanisms when forcing the
adjustment screws.
1. When adjustment screw (10) is rotated too much counter clock
wise.
2. When adjustment screw (9) is rotated too much clock wise.
3. When the adjustment screws (9 & 10) are rotated too much in
the direction according to their related arrows.
Situation 1 and 2 may happen in combination with situation 3.
Open Position:
• Turn bottom screw (9) counter clock wise (do not force the adjustment screw) until the switch trips to the “on state”.
Open Position:
• Turn the screw minimal a 1/2 turn counter clock wise.
• The “open” position switch point is now set.
• Turn the shield (12) back over the adjustment screws and fasten it
with the screw (11) and mount the main round cover (15) back in
place.
• This position represents the actual, mechanical “open” position of
the valve.
All rights reserved. Copyright © Emerson Process Management. The information in this document is subject to change without notice. Updated data sheets can be obtained from our website www.Fieldq.com or from your nearest Valve Automation Center:
America’s: +1 813 630 2255 (fax +1 630 9449) Europe: +31 74 256 10 10 (fax +31 74 291 09 38) Asia/Pacic: +65 626 24 515 (fax +65 626 80 028)
Copyright © 2008 Emerson Electric Co.
Important
• If the switch adjustment screws block or it is unknown what
the swith point setting is, use the instructions as shown at
the back of this page.
Switch Adjustment Instruction QC41, QC42 and QC43 Module Q-series
DOC.SAI.QC4X.EN Rev. 0 July 2015
Setting the switch point back to factory
settings.
• If the switch adjustment screws block or
it is unknown what the
swith point setting is,
use these instructions
to set the switch point
back to the factory settings. (±15° before each
end of stroke), assuming
a mechanical stroke of
90°±0.5° of the actuator.
• Make pneumatic and electrical connections before adjusting
the limit switch setting. See chapter 3 and 4 of QC40 Installation guide.
• If there is trouble with setting the Close Position, set Open
Position rst (steps 5 to 7) and set the Close Position (steps
2 to 4) after Open Position is set.
15
Factory setting of
switch points
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±15°
90°
±15°
CAUTION: DO NOT FORCE THE ADJUSTMENT
SCREWS WHEN RESISTANCE IS FELT.
During adjustment there are three situations that can damage the
adjustment screw head and internal mechanisms when forcing the
10
adjustment screws.
1. Pivot block (2) will be blocked at bottom if screw (10) is rotated
too much counter clock wise.
8
9
2. Pivot block (4) will be blocked at top if screw (9) is rotated too
much clock wise.
3. Pivot blocks (2 & 4) will interfere with each other, if the adjustment screws (9 & 10) are rotated too much in the direction according to their related arrows.
Situation 1 and 2 may happen in combination with situation 3.
6
7
4
3
2
5
21 3 4
Close
1
15
10
11
12
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9
11
12
Shield screw:
Cross slotted Phillips
nr. PH2
• Remove main round cover (15) and loosen the screw (11) of the
shield (12) and turn the shield down.
Preliminary Field Trial Documentation
5
Open Position:
• Move the actuator/valve assembly to the open position.
• For normal double acting or spring return modules, apply the
control signal to pilot valve terminal 8 and 9.
• In case of a double acting “Fail-in-Last-Position” module, remove
the control signal to terminal 11 and 12 and apply the control
signal to terminal 8 and 9.
Open
Closed Position:
• Move the actuator/valve assembly to the closed position.
• For normal double acting or spring return modules, remove the
control signal from pilot valve terminal 8 and 9.
• In case of a double acting “Fail-in-Last-Position” module, apply a
control signal to terminal 11 and 12 and remove the control signal
from terminal 8 and 9.
6
9
Ω
Open Position:
• Turn bottom screw (9) clock wise maximum 20 turns, (do not force
the adjustment screw) until the switch trips to the “on state” (no
signal).
Max.
20x
10
Adjustment screws
Ω
Max.
20x
0.6 x 3.5 or
Cross slotted Phillips
nr. PH2
Closed Position:
• Turn top screw (10) counter clock wise maximum 20 turns, (do not
force the adjustment screw) until the switch trips to the “off state”
Preliminary Field Trial Documentation
Closed Position:
• Turn top screw (10) clock wise 1 3/4 turn (do not force the adjust-
(no signal).
7 8
9
Ω
Open Position:
• Turn bottom screw (9) counter clock wise 1 3/4 turn (do not force
the adjustment screw)
• The “open” position switch point is now set to factory setting.
1 3/4
turn
• Turn the shield (12) back over the adjustment screws and fasten it
10
1 3/4
Ω
turn
ment screw).
The “closed” position switch point is now set to factory setting.
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12
with the screw (11).
All rights reserved. Copyright © Emerson Process Management. The information in this document is subject to change without notice. Updated data sheets can be obtained from our website www.Fieldq.com or from your nearest Valve Automation Center:
America’s: +1 813 630 2255 (fax +1 630 9449) Europe: +31 74 256 10 10 (fax +31 74 291 09 38) Asia/Pacic: +65 626 24 515 (fax +65 626 80 028)
Copyright © 2008 Emerson Electric Co.
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