Regada MO 3, Installation, Service And Maintenance Instructions

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24 MO 3, MO 3.3, MO 3.4, MO 3.5
4.5 Adjustment of resistant transmitter (Fig.9)
Function of resistance transmitter:
- remote position indicator
- feedback for controller (valid for Electric actuator with controller)
- remote position indicator with converter.
Before the resistant transmitter adjustment the position switches have to be adjusted. Adjustment consists
in setting of the resistance in the defined limit position of the EA.
Notes:
1. In case that the EA is not used in the working revolutions range according to chosen degree on the
competent stroke according to table 3, the resistance in the limit position "open" is proportionally reduced.
2. In the EA MO with controller 2000
Ω
resistant transmitters are used. In the other cases if the resistant branch
is lead to the terminal board the resistance of the transmitters is according to the customer's specification.
With EA of 2- wire converter a transmitter of 100
Ω
resistance is used .
To adjust the transmitter follow these steps:
•
Loosen the fixing screws (90) of the transmitter holder and push the transmitter out of mesh.
•
Connect the measuring instrument for measuring the resistance to terminals 71 and 73 on the Electric
actuator local control terminal box, or to terminals 7 and 10 on the Electric actuator local control controller
with the controller with the disconnected supply voltage to Electric actuator and with the disconnected input
signal into the controller (terminals 86-88).
•
Put the actuator to the position ”closed” (with the hand wheel, or with the local electric position control until
the corresponding position switch S2 or S4 switches).
•
Rotate the transmitter (91) shaft until resistance of
≤
5% of the nominal transmitter resistance can be read on
the meter in case of EA MO , and 3 up to 7% of the nominal transmitter resistance in case of EA MO with
controller , i.e. with the resistant transmitter with the converter PTK1.
•
In the position put the transmitter to mesh with the drive wheel and fix the fixing screws on the transmitter
holder. Disconnect the meter from the terminal board.
•
If when in the open position, the value of the resistance of the transmitter is greater than permitted, then the
working stroke must be reduced.
90
92
Fig.9
91