MO 3.3, MO 3.4, MO 3.5
19
4.4 Set up of resistive transmitter with EPV – 2 converter – wire make
Resistive transmitter with converter is set up by production plant in a way that output elec-tric current
signal measured on terminals 81-82 (connection drawing
Z10a – without power source, or Z269a – with power
source) has the value:
·
In position “open “ ..........................................20 mA
·
In position “closed “ ...........................................4 mA
Should the repeated set up of converter is required, proceed as
follows:
Set up of EPV:
·
Reset EA to position “closed“ and switch OFF supply of
converter.
·
Set up resistive transmitter by measuring the value of resistor
(in position „Z“
£
7
W
) on terminals X-Y (pic. 11). Used is
resistive transmitter with
ohmic value 100
W
.
·
Switch ON the supply of converter.
·
Set up the value of output electric current signal measured on terminals 81-82 to value 4mA by turning
adjusting trimmer ZERO (pic. 11).
·
Set EA to position „open“.
·
Set the value of output electric current signal measured on terminals 81-82 to value 20mA by turning
adjusting trimmer GAIN (pic. 11).
·
Check output converter signal in both terminal positions and repeat the procedure if neces-sary.
Remark:
The values of output signal 4-20mA can be set up at the value 75 up to 100% of nominal stroke stated on electric
actuator type label. If the value is smaller than 75% the value of output signal is proportionally reduced bellow 20mA.
4.5 Set up of resistive transmitter with EPV – 3 converter – wire make
Resistive transmitter with converter is from production plant set up in a way that output electric current
signal measured on terminals 81-82 (connection drawing Z257b without power source, respectively Z260a
with power source) has the value:
·
In position “open “................................................20 mA resp. 5 mA
·
In position “closed “ ...........................................0 mA resp. 4 mA
According to specified converter make.
Should the repeated set up of converter is required,
proceed as follows:
·
Reset EA to position “closed“ and switch OFF
supply of converter.
·
Set up resistive transmitter by measuring the value
of resistor on the terminals X-Y (pic. 12). Used is
resistive transmitter with
ohmic value 2000
W
.
·
Switch ON the supply of converter.
·
Set up the value of output electric current signal
measured on terminals 81-82 to value 0 mA, respectively 4mA by turning adjusting trimmer ZERO (pic.
12).
·
Set EA to position „open“.
·
Set the value of output electric current signal measured on terminals 81-82 to value 20mA,
respectively 5 mA by turning adjusting trimmer GAIN (pic. 12).
·
Check output converter signal in both terminal positions and repeat the procedure if neces-sary.
Remark:
The value of output signal (0 -20mA ,4 -20mA resp. 0 -5mA according to specification) can be set up at the value of 85
up to 100% of stroke, stated on type label of EA. If the value is smaller than 85%, the value of output signal is
proportionally reduced.
pic.11
obr.12