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GE Masoneilan 469 Series Instruction Manual page 17

Position transmitter and limit switch
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8.
Calibration (Contd)
8.2 Calibration of rotary limit switch
496-.57 and 496-.58 equipped with
proximity switch(es)
8.2.1 Type 496-4
• Actuate the valve to the desired triggering position
and check the sense of rotation when the arm leaves
the proximity sensor.
• The figure below shows the location of the proximity
sensor and of the arm when triggering as a function
of the sense of rotation.
• Slowly move the arm towards the proximity sensor
until it triggers. Triggering occurs when the arm
overlaps approximately 1/3 of the proximity switch.
• Strictly follow safety instructions under §7.4 before
putting into service.
34
Rep.
Designation
33
Arm
© 2018 Baker Hughes, a GE company. All rights reserved.
34
33
Rep.
Designation
34
Proximity switch
8.2.2 Type 496-5
During adjustment make sure that the proximity
switch with the red spot is triggered by the arm with
the red spot.
• Adjustment of the first proximity switch
– The first switch is adjusted at the beginning of
the stroke.
– Check what will be the sense of rotation when the
valve is actuated. Figure (b, c) below shows the
proximity sensor and the arm assigned to the first
triggering point for a given the sense of rotation.
– Slowly move the arm towards the proximity switch
until it triggers.
• Adjustment of the second proximity switch
– The second switch is adjusted at the end of the
actuator stroke.
– Immobilize the first arm previously adjusted and
slowly move the second arm towards the second
proximity sensor until it triggers.
– Make sure the first proximity switch is still
correctly adjusted.
• Strictly follow safety instructions under §7.4 before
putting into service.
A
B
b
Rep.
Designation
A
Red spot
496 Series Masoneilan Position Transmitter ATEX Instruction Manual | 17
a
B
c
Rep.
Designation
B
First triggering point

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