49
TN4FCXA2
j
-EDF-
E
Menu A: Calibration of the measurement
range (CALIBRATE)
The FCX-AII pressure transmitters
intended for use in nuclear power
plants are delivered configured with
an enabled write protection and
with a measuring range calibrated
at the factory. The on-site configuration 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.
The configuration menu “A:CALIBRATE”
(calibration) is intended for the calibration of the
measuring limits (LRV and URV). The changes
to the measurement range are carried out in the
configuration menu “6:RANGE”. Only use the
menu “A:CALIBRATE” after having configured
LRV and URV correctly in the “RANGE” menu.
Fine adjustment of the lower measurement
limit:
LRV (
The
ower
R
ange
v
alue) = lower
measurement limit.
It can be done after you have pressed the
<LRV> key. The set value is displayed in the
menu A-1 that relates to this.
Vent the measuring chambers of the transmitter
(in the case of a zero offset or for an absolute
pressure model, supply the pressure that corresponds to the transmitter), and press the <ENT>
key. Then “CHNG OK?” appears on the display, and this must be validated by <ENT> or erased by
<CL>. After pressing <ENT>, “A-2: CALIBRATING” is displayed on the screen and the characteristics
of the calibration are taken over by the transmitter. Finally, the configuration menu A “CALIBRATE”
reappears on the display.
End calibration of the upper measurement limit:
URV (
U
pper
R
ange
V
alue) = upper measurement
limit. This is effected once the key <URV> key has been pressed in the same way as for the fine
adjustment of the lower measurement limit.
a) The calibration of the measuring range (URV and LRV) requires a pressure generator
with a precision better than that of the device. If the user does not have this type of
means of pressure generation, do not use the menu A “CALIBRATE” but only the
MENU 6 “RANGE”, otherwise the transmitter would indicate totally erroneous values.
The “RANGE”menu allows the accuracy given by the factory calibration to be maintained
while varying the measurement range.
b) Only use the menu A “CALIBRATE” after having configured LRV and URV correctly in
the “RANGE” menu.
c) Transmitters with digital indicator and scale specific to the user do not take into account
the changed data in the “RANGE” or “CALIBRATE” menus for the display. The displayed
values corresponding to points 0% and 100% of the transmitter must be reset for the
display to indicate the values consistent with the corresponding pressures.
The configuration displays in 0-100% do not require a new setting.
INC
A: CALIBRATE
< INC > < LRV >
1
CL
ENT
2
A-1: CALIBRATE
LRV
XXX
.
XX
%
CHNG OK? < ENT/CL >
3
A-2: CALIBRATING
LRV
XXX
.
XX
%
4
A-1: CALIBRATE
LRV
XXX
.
XX
%
< ENT > < CL >
ENT
XXX
.
X
kPa
XXX
.
X
kPa
XXX
.
X
kPa
5
A-3: CALIBRATE
URV
XXX
.
XX
%
CHNG OK? < ENT/CL >
6
A-4: CALIBRATING
URV
XXX
.
XX
%
7
A-3: CALIBRATE
URV
XXX
.
XX
%
< ENT > < CL >
XXX
.
X
kPa
XXX
.
X
kPa
XXX
.
X
kPa
LRV
CL
CL
ENT
CL
ENT
URV
< URV >
< Zero adjustment >
< Span adjustment >
B : OUTPUT ADJ
9 : BURNOUT
INTERDICTION
Important
