Yokogawa EJX440A - Manual (Page 24)

IM 01C25T03-01E 3-16
3. OPERATION
b-1. Auto Sensor Trim
• Example: For the range of 10 to 30 kPa.
FEED NO OK
SET
J11:P ZERO ADJ
10.0000 kPa
ESC CLR DEL
ESC CLR DEL
SET
J11:P ZERO ADJ
9.94000 kPa
+ 10 Set 10.
After obtaining a stable pressure of
10 kPa, press key twice.
F0351.EPS
Press the (OK) key.
ESC
SET
J10:ADJ PRES
9.94000 kPa Transmitter indicates 9.94 kPa as
its output when applying a standard
pressure of 10 kPa.
ESC
SET
J10:ADJ PRES
30.1500 kPa Transmitter indicates 30.15 kPa as
its output when applying a standard
pressure of 30 kPa.
ESC
SET
J10:ADJ PRES
10.0000 kPa Check the output becomes 10 kPa.
ESC
SET
J10:ADJ PRES
30.0000 kPa Check the output becomes 30 kPa.
FEED NO OK
SET
J12:P SPAN ADJ
30.0000 kPa Press the (OK) key.
Set 30.
After obtaining a stable pressure of
30 kPa, press key twice.
SET
J12:P SPAN ADJ
30.1500 kPa
+ 30
Setting a lower point
Setting an upper point
b-2. Manual Sensor Trim
• Example: For the range of 10 to 30 kPa.
J15: P ZERO DEV =
Ϫ
0.04 kPa
J16: P SPAN DEV = Ϫ 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.
Ϫ 0.04 ϩ 0.06= ϩ 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 Ϫ 0.1 by adding Ϫ 0.1 to
J16: P SPAN DEV.
Ϫ 0.03 ϩ ( Ϫ 0.1) = Ϫ 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 Ϫ 0.13.
Press key twice.
Press the (OK) key.
Applied Pres Value Ϫ Measured Pres Value
Applied Pres Value
Slope Error ϫ (URV Ϫ LRV) ϭ
30.00 Ϫ 30.15
30.00
ϫ (30.00 Ϫ 10.00)
ϭ ϭ Ϫ 0.1