Calibrating A Pressure Transmitter - AOIP calys 60 IS Manuel D'instructions

10 C
ALIBRATING A PRESSURE TRANSMITTER
The following procedure is used to test and to calibrate a pressure transmitter 4-
20mA
EXAMPLE:
•
Connect the instrument like in the figure beside. In this case, the calibrator
powers the transmitter, then connect the input channel (1 or 2) as passive
loop.
Set one of the available Xscale memories (e.g. X1) for 4-20mA input and a proper
pressure range
MENU MENU
Co n f i g u r a t i o n Co n f i g u r a t i o n
Te mp e r a t u r e Te mp e r a t u r e
Un i t Un i t
Pr e s s u r e [ mb a r ] Pr e s s u r e [ mb a r ]
Ra mp - Me mo r y s c a n Ra mp - Me mo r y s c a n
Xs c a l e Xs c a l e
Da t a l o g g e r Da t a l o g g e r
Ad v a n c e d Ad v a n c e d
Pr e s s < > t o SET Pr e s s < > t o SET
Pr e s s < > t o SET Pr e s s < > t o SET
then set the parameters of scaling:
Manuel d'intructions NTA47248-300A4
Un i t Un i t XSc a l e XSc a l e
X1 X1
X2 X2
X3 X3
X4 X4
Pr e s s < > t o SET Pr e s s < > t o SET
X1 X1
Uni t [ m bar ] Uni t [ m bar ]
Par amet er [ 50 mA] Par amet er [ 50 mA]
I n Low [ 4] I n Low [ 4]
I n Hi gh [ 20] I n Hi gh [ 20]
Di s p Low [ 0] Di s p Low [ 0]
Pr es s < > t o SET Pr es s < > t o SET
in this case: a pressure value of 0-100mbar corresponds to a linear function in 4-
20mA and 2 decimal digits (see par. 4.3)
•
Select CH1 or CH2 as input and set it as Xscale (e.g. X1)
press [ ] to select "Process Function":
SEL ECT Ch 1
Vo l t a g e
Re s i s t a n c e
Fr e q u e n c y / Pu l s e
Pr o c e s s Fu n c t i o n
Ro u n d i n g : 0 . 0 0 0 0
Pr e s s < > t o SET
Pr es s < > t o SET
NOTE: after properly visualizing the inputs on the display, zero the measure of
pressure (see par. 5.2).
At this moment, the system is properly set for a calibration procedure.
REMARK: as the aim of a calibration procedure is that one to check an error,
we suggest setting the display in order to show of both channels
and the difference between them, which gives us straightforwardly
an error value (see par. 4.8)
106
X1 X1
I n Hi gh [ 20] I n Hi gh [ 20]
Di s p Low [ 0] Di s p Low [ 0]
Di s p Hi gh [ 100] Di s p Hi gh [ 100]
Func t i on [ l i near ] Func t i on [ l i near ]
Dec i m al s [ 2] Dec i m al s [ 2]
Pr es s < > t o SET Pr es s < > t o SET
SEL ECT Ch 1
Th e r mo c o u p l e
RTD t h e r mo me t e r
Cu r r e n t
Vo l t a g e
Re s i s t a n c e
Pr e s s < > t o SET
Pr o c e s s Fu nc t i o n
Xs c a l e
XSc a l e
X1
Li n Ma n [ ] X2
X3
X4
Se t X1
Pr e s s < > t o SET