IM 01C25T03-01E
3-16
3. OPERATION
b-2. Manual Sensor Trim
• Example: For the range of 10 to 30 kPa.
J15: P ZERO DEV =
0.04 kPa
J16: P SPAN DEV =
0.03 kPa
Suppose that a standard pressure of 10 kPa is applied and
the value of the parameter of J10: ADJ PRES is 9.94 kPa.
Correct for this output error of 0.06 kPa by adding 0.06 to
J15: P ZERO DEV.
0.04
0.06=
0.02
FEED
NO
OK
SET
J15:P ZERO DEV
0.02000 kPa
Suppose that a standard pressure of 30 kPa is applied and
the value of the parameter of J10: ADJ PRES is 30.15 kPa.
Firstly, obtain the slope error for the span as follows;
Then correct for this slope error of
0.1 by adding
0.1 to
J16: P SPAN DEV.
0.03
(
0.1) =
0.13
ESC
CLR
DEL
SET
J15:P ZERO DEV
-0.04000 kPa
+ 0.02
Set
0.02
.
Press key twice.
Press the (OK) key.
F0352.EPS
FEED
NO
OK
SET
J16:P SPAN DEV
-0.13000 kPa
ESC
CLR
DEL
SET
J16:P SPAN DEV
-0.03000 kPa
- 0.13
Set
0.13
.
Press key twice.
Press the (OK) key.
Applied Pres Value
Measured Pres Value
Applied Pres Value
Slope Error
(URV
LRV)
30.00
30.15
30.00
(30.00
10.00)
0.1
c. Sensor Trim for Static Pressure
(J21: SP ZERO ADJ, J22: SP SPAN ADJ,
J25: SP ZERO DEV, J26: SP SPAN DEV)
For the EJX differential transmitters, zeroing and full
sensor trim of the static pressure is performed in the
same way as with the primary process variable (PV).
Note that the static pressure sensor trim should be done
only after trimming the PV.
d. Reset Trim Adjustment to Factory Setting
(J56: CLEAR ADJ)
Use
PRES
or
SP
of J56: CLEAR ADJ parameter to
reset the trim adjustment to the initial calibrated values
that were set. When
PRES
is selected to clear the
adjustment, the amount of the adjustment by the
external zero-adjustment screw is returned to the initial
setting as well.
• Example: Reset the trim adjustment of pressure
to factory set characterization curve.
ESC
SET
J56:CLEAR ADJ
---
FEED
NO
OK
Use the or key
to select
PRES
.
Press the key twice to
enter the setting.
Press the (OK) key.
F0353.EPS
SET
J56:CLEAR ADJ
---
< --- >
< PRES >
< SP >
< 4-20mA >
