47
TN4FCXA2
j
-EDF-
E
The FCX-AII pressure transmitters
intended for use in nuclear power
plants are delivered configured with
an enabled write protection. The
configuration of the output signal
of the device must be done before the write
protection is lifted according to the provision
specified on page 35. After all the operations are
complete, the write protection must be replaced.
Depending on how the differential pressure sensor
is used, the output signal can be programmed
either in linear (output proportional to the differential
pressure) or in square root output (SQR = SQUARE
ROOT; output proportional to the flow rate).
If the square root (SQR) output is chosen, the tipping
point and the mode of the output signal between the
zero point and the failover point are programmable.
8-1 Changing the output signal mode
The change in this mode 2 is carried out by
pressing “CHNG ALHA” and then the “INC” OR
“DEC” keys. Validate and confirm with “ENT” 3
or 4 (return with “INC”).
After the registration of the new mode 5 or 6 , a
new screen appears 7 for the square root mode,
otherwise screen 1 returns.
8.-3. Adjusting the failover point
In square root, the failover point can be changed.
The failover point is adjustable between 0.00 and
20.00% of flow to be measured. A failover point close
to 0% can cause an unstable output signal. The
failover point is used to improve the measurement
of very low flow.
Press “CHNG ALHA” to change the value of the
failover point 8 . Validate and confirm with “ENT” 9 .
The recording in the transmitter is carried out 10 .
A new screen appears to set the signalling between
zero and the failover point 11 or 12 .
8-6 Setting the signalling mode between zero
and the failover point
- Linear mode of the output signal between
zero and the failover point (Fig A)
- Mode with output signal at zero between the zero for
measurement and the failover point. (Fig B)
Press “CHNG ALHA” to change the mode type.
Select <1> or <2> depending on the selected
mode 13 .
Validate and confirm with “ENT” 14 or 15 .
Exit this menu by pressing “CL”.
Menu 8: Setting the output
signal (OUTPUT MODE)
8:
OUTPUT MODE
XMTR:DP
OUT=LIN
< INC > < CHANGE >
8-1: MODE CHANGE
XMTR : DP
OUT=LIN
< INC > < ENT > < CL >
8-1: MODE CHANGE
XMTR : GP
OUT=LIN
< ENT > < CL >
8-1: MODE CHANGE
XMTR:DP
OUT=SQR
CHNG OK? < ENT/CL >
8
: OUTPUT MODE
XMTR:GP
OUT=LIN
< INC > < CHANGE >
8-2: MODE WRITE
XMTR:DP
OUT=SQR
8-3: LOW CUT
POINT=
XX
.
XX
%FLOW
MODE=
< CHANGE > < CL >
< ENT > < CL >
8-5: POINT WRITE
XX
.
XX
%FLOW
8-7: LOW CUT MODE
< 1 > LINEAR
< 2 > ZERO
< 1 > < 2 > <CL >
8-7: MODE CHANGE
LINEAR
CHNG OK? < ENT/CL >
8-8: MODE WRITE
LINEAR
8-1: MODE CHANGE
XMTR:DP
OUT=LIN
CHNG OK? < ENT/CL >
*1
<OUTPUT MODE
CHANGE>
8-4: POINT CHANGE
XX
.
XX
%FLOW
8-4: POINT CHANGE
XX
.
XX
%FLOW
8-6: LOW CUT MODE
ZERO
< CHANGE > < CL >
8-7: MODE CHANGE
ZERO
CHNG OK? < ENT/CL >
8-8: MODE WRITE
ZERO
OUT=LIN
LIN/ D
8-2: MODE WRITE
XMTR:DP
OUT=LIN
INC
1
1
INC
(a)
(DP)
GP, AP, LL (Liquid Level)
2
CL
ENT
ENT
3
CL
ENT
4
CL
CL
6
ENT
5
CHNG
CL
CHNG
CHNG
7
ENT
CL
ENT
CL
CL
8
1
OUT=SQR
2
9
CHNG
10
8-6: LOW CUT MODE
LINEAR
< CHANGE > < CL >
11
CL
12
CL
15
ENT
13
CL
2
1
ENT
CL
14
16
17
< INC >
*1
*2 0.00% Cut Point 20.00% FLOW
Note) GP, AP, LL : OUT = LIN only
< DEC > Available Mode
In case of OUT= SQR
In case of OUT=LIN
CHNG
Menu 9
(a)
*2
CHNG OK? < ENT/CL >
= LINEAR or ZERO
Menu 7
Important
Sortie
Point de
basculement
Point de
basculement
Sortie
Entrée différentielle
Entrée différentielle
Fig.A : Avec sortie linéaire
en mode basculement
Fig.B : Avec sortie zéro
en mode basculement
