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MAN 604A Rev. 5
Operation and Use
Section 3: Operation and Use
3.2 Calibration of Micro-switches (If Foreseen)
(Refer to Safety Instructions Manual for limit switch box)
!
WARNING
Refer only to technical documentation related to installed switch-box model.
NOTICE
For mounting interface dimension of the Limit Switch box on the cover of the actuator,
please refer to TN1163V (for metric dimension) or TN1163VU (for imperial dimension).
NOTICE
Operate only the micro-switch corresponding to the direction of operation being carried
out, as clearly reported on the micro-switch. End of stroke microswitches should be
operated before the stop of the stroke of the actuator due to mechanical stops. Adjust the
relative cams properly.
June 2020
Installation, Operation and Maintenance Manual
3.3 Calibration of Operating Time
The calibration of the operation time is made by Bif Italia s.r.l according to customer
requirements and to technical data sheet included in technical documentation. If necessary,
it’s possible to modify or to reset the operating time through the ow regulation valve
placed between the control system and the pneumatic cylinder (Figure 19).
To carry out the adjustment, use an adequate Allen wrench and follow these steps
(Figure 19):
• Loosen the locknut.
• Screw with a screwdriver the setting screw to increase the operation time.
• Unscrew with a screwdriver the setting screw to decrease the operation time.
• After the adjustment is over screw the locknut
The procedure is absolutely general. It is applicable both fail-to-open and
fail-to-close actuators.
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