Regada SO 2-Ex, Инструкции по установке, обслуживанию и техническому обслуживанию

Страница: 24 / 44

22 SO 2-Ex
•
Turn the adjusting trimmer GAIN to adjust the output current signal rate measured on the terminals 81-82 to
20mA or 5 mA.
•
Check the output signal of the converter in the both limit positions, and repeat the procedure if needed.
Note:
The output signal of (0-20mA, 4-20mA or 0-5mA - according to the specification) can be adjusted at the range
from 85 up to 100% of the rated stroke according to table Nr.3. At values less than 85% the value of the output
signal is reduced proportionally.
4.5 Adjustment of Capacitive Transmitter CPT1/A
The chapter describes adjustment of the capacitive transmitter to the specified parameters (standard
values of output signals) in case they are reset. The capacitive transmitter serves as a position transmitter of
electric actuators with unified output signal of 4÷20 mA in electric actuators
SO 2-Ex , or as a feedback of a
position controller, or if required it functions also as a remote position transmitter of electric actuators with unified
output signal of 4÷20 mA in electric actuators
SO 2-Ex with controller.
Note 1:
In case that reversed output signals are needed (in the position ”OPEN” minimum output signal) contact
personnel of service centres.
Note 2: In case of reverse output signal need (in position OPEN minumum output signal), please contact our
service
The capacitive transmitter CPT1/A is adjusted by the producer to the fixed operation stroke according to
the order and wired according to the wiring diagrams placed into the cover. Check the power supply of the user
after connecting to terminal of the terminal board before the transmitter is electrically checked. Adjustment of the
capacitive transmitter can be performed when the position switches are adjusted. The adjustment is performed
with the power supply of 230 V/50 Hz and ambient temperature of 20
±
5°C.
The following versions of electric actuators with built capacitive transmitters can be specified:
A) The version without any power supply (2-wire version) for EA SO 2-Ex
B) The version with a power supply (2-wire version) for EA SO 2-Ex
C) The version CPT as a feedback to the position controller for EA SO 2-Ex with controller
A.) Adjustment of the Capacitive Transmitter without any Power Supply
Before connecting check the power supply. The measured voltage should be in range from 18 up to 28
V DC.
The voltage of the power supply must not be in any case higher than 30 V DC . The transmitter can
be irreversibly damaged!
While checking or adjusting the output signal of 4÷20 mA follow these steps:
•
Connect a mA meter of precision class 0,5 and loading resistance lower than 500
Ω
serially with the
transmitter (pole “-“; terminal
82)
•
Put the actuator to the
position ”CLOSED”, the
signal value should
decrease.
•
Check the signal value for
the position ”CLOSED” (4
mA).
•
Tune the signal with
loosening the fixing screws
(15) and turning the trimmer
(10) until the required value
of 4 mA is reached. Tighten
the fixing screws.
•
Put the actuator to the
position ”OPEN”, the signal
value should raise.
•
Check the signal value for the position ”OPEN” (20 mA).
•
Tune the signal with turning the trimmer (20) until the required value of 20 mA is reached.
•
Check the signal value for the position ”CLOSED” and then for the position ”OPEN”.
!
Fig.7
15
20
10