Yokogawa EJX115A - Manual (Page 25)

<5. Parameter Setting>
5-5
IM 01C25T04-01EN
(4) Reset Adjustment to Factory Setting
The Clear Calibration method can reset the
adjustment to the initial calibrated values that were
set. The amount of the adjustment performed with
the external zero-adjustment screw is returned the
initial setting as well.
• Procedure to call up the display
DTM Calibration →
EDD [Menu] → Device → Sensor
Calibration → Clear Calibration
→ Clear Calibration
(Method)
Reset adjustment to factory setting
5.3 Input Signal Setup
5.3.1 Low Flow Cut Off
Low cut mode can be used to stabilize the output
signal near the zero point. Note that this function is
only available when Output Mode (Characterization
Type) is “Square root”.
(%)
50
50
(%)
Output
20
0
Input
F0502.ai
Example: Low cut at 20%
Figure 5.1 Low Flow Cut Off
Follow the procedure below to change the low
cut point. Sensor Transducer Block Target Mode
needs to be changed to Out of Service (O/S) before
changing low cut point.
DTM Input → Target Mode
EDD Input → Sensor Transducer Block →
Target Mode
• Procedure to call up the display
DTM, EDD Input → Sensor Transducer Block →
Characterization → Low Flow Cut Off
The low cut point has hysteresis so that the output
around the point is behaved as below figure.
(Hysteresis for the cut point: 10% of the cut point)
<Example>
Low cut: 20.00%
F0503.ai
10%
Output
Input
Hysteresis fixed at 10%
of the cut point
20%
22%
5.3.2 Primary Value Scale (Scale Out) and
Primary Value Unit
Primary value is measured value available to the
function block. Sensor Transducer Block Target
Mode needs to be changed to Out of Service (O/S)
before changing primary value scale and primary
value unit.
DTM Input → Target Mode
EDD Input → Sensor Transducer Block →
Target Mode
(1) Output Scale (Scale Out)
To change the Output Scale, follow the steps below.
• Procedure to call up the display
DTM Input → Sensor Transducer Block →
Primary Value →
→ LRV Scale Out:Lower Value
→ URV Scale Out:Upper Value
EDD Input → Sensor Transducer Block →
Measured Value – Primary Value →
→ LRV Lower Value
→ URV Upper Value
(2) Primary Value Unit
Follow the procedure below to change the unit
parameter.
• Procedure to call up the display
DTM Input → Sensor Transducer Block →
Primary Value → Primary Value Unit
EDD Input → Sensor Transducer Block →
Measured Value – Primary Value → Unit