Yokogawa EJA110A - Manual (Page 50)

IM 01C21B01-01E 8-13
8. BRAIN TERMINAL BT200 OPERATION
(14) Bi-directional Flow Measurement Setup
(E30: BI DIRE MODE)
(a) This parameter enables selection of 50% output at
an input of 0 kPa.
Procedure is shown in the figure below.
(b) Combining this with C40: OUTPUT MODE
provides a square root output computed indepen-
dently for 0% to 50% output and for 50% to 100%
output.
• Example: If measurement range is 0 to 10 kPa
(LRV=0 kPa, HRV=10 kPa)
The measurement range changes to –10 to 0 to 10 kPa
(output 0% to 50% to 100).
Note that “C21: LOW RANGE” and “C22: HIGH RANGE”
are not changed.
ESC
SET
E30:BI DIRE MODE
OFF
< OFF >
< ON > Use the or key
to select “ON.”
Press the key twice to
enter the setting.
F0829.EPS
20 mA (100% display)
4 mA (–100% display)
᭹ Output mode “LINEAR”
LRV HRV
F0830.EPS
20 mA (100% display)
Low Cut
4 mA (–100% display)
᭹ Output mode “SQUARE ROOT”
LRV HRV
(15) Range Change while Applying Actual
Inputs (H10: AUTO LRV, H11: AUTO HRV)
This feature allows the lower and higher range values
to be set up automatically with the actual input applied.
If the lower and higher range values are set,
C21:
LOW RANGE and C22: HIGH RANGE are changed
at this same time.
Follow the procedure in the figure below.
The measurement span is determined by the higher and
lower range values. Changing the lower range value
results in the higher range value changing auto-
matically, keeping the span constant.
• Example 1: When changing the lower range
value to 0.5 kPa for the present
setting of 0 to 30 kPa, take the
following action with input pressure
of 0.5 kPa applied.
FEED NO OK
SET
H10:AUTO LRV
0.5000 kPa
DATA DIAG PRNT ESC
PARAM
H10:AUTO LRV
0.5000 kPa
H11:AUTO HRV
30.500 kPa
H60:SELF CHEC
GOOD
ESC
SET
H10:AUTO LRV
0 kPa
+ 0
F0831.EPS
The higher range value is changed
keeping the span constant.
Parameters C21 and C22 are
changed at the same time.
Press the key twice.
The lower range value is changed
to 0.5 kPa.
Press the (OK) key.