Yokogawa EJX115A - Manual (Page 24)

<3. Operation>
3-16
IM 01C25T03-01E
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.
F0340.ai
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 = –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 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 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.
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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
Ч (30.00–10.00) = = –0.1