How To Set The Detailed Setting - Fuji Electric FLR-3 Instruction Manual

4.11.11. How to set the detailed setting

Description
 The data required for time difference measurement can be set as follows.
 This parameter is intended for our service personnel.
 Do not change the setting by yourself. Otherwise measurement may be disabled.
 Make the detailed setting only when a problem should arise in flow rate measurement with factory default settings, and
instructed to do so by a trained factory representative. Setting need not be made in other cases.
 Setting items
Item Input method
Transmission
count
Trigger control
Numeric value
Window control
Numeric value
Numeric value
Saturation (level)
Numeric value
Measurement
method
Signal balance
Numeric value
Transmission
pattern
AGC gain
Numeric value
Numeric value
Signal peak
Transmission Numeric value
wait time
For actual keying, refer to the typical operation indicated below. Set the protection to OFF beforehand. (See Section 4.4.1.)
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The number of transmission of ultrasonic signals per flow rate signal output
Select value: 128)
When standard mode is selected for the operation mode:
 8, 16, 32, 64, 128, 256
When high speed response mode is selected for the operation mode:
 4, 8, 16, 32, 64, 128
Control method setting of the trigger level (detection point) of ultrasonic signals. (Factory-set
value: AUTO)
 AUTO
 MANUAL
Select
Select the detection point according to the rate against the peak of receiving wave
regarded as 100%.
 Trigger level: 10% to 90%.
Setting of control method of measurement window that takes in signals (Factory-set value:
Select AUTO)
 AUTO
 MANUAL
Set the time of starting taking in signals (period from the start of transmission until the
startup of window signals)
 U: open time: 1μs to 16383μs
 D: open time: 1μs to 16383μs
Note) U: forward direction, D: reverse direction
In case of MANUAL, set U and D.
The number of times that the amplitude of received signals fluctuates and exceeds ±1.0V
(saturation) per 1 flow rate signal output. Used as the threshold value for judging the error
status of signals. A signal error occurs if the specified number of times is exceeded.
(Factory-set value: 128) Refer to diagram *1) in the next page.
 0 to 256
Setting of measurement method for measuring transit time. (Factory-set value: method 2)
 Method 1: Strong against interference
Select
 Method 2: Controls triggers on the plus side of the direction of voltage of received signals.
 Method 3: Controls triggers on the minus side of the direction of voltage of received
signals.
Setting of threshold value used for judging the existence of transit time. A signal error occurs
if the specified value is exceeded. (Factory-set value: 25%)
 0% to 100%
Note) Set to 50% or higher for Method 1.
Setting of transmission pattern of ultrasonic signals (Factory-set value: Burst 3)
 Select from BURST 1, BURST 2, BURST 3, BURST 4, BURST 5, CHIRP 4 and CHIRP 8.
Select
Setting of control method of signal AGC gain (Factory-set value: AUTO)
Select Signal peak is controlled to be kept at 1.5V
 AUTO
 MANUAL
Make the setting so that the signal peak in both forward and reverse directions is kept at
1.5V .
PP
 Forward gain: 1.00% to 99.00%
 Reverse gain: 1.00% to 99.00%
Setting of signal peak threshold value per 1 flow rate signal output *1). Used as the
Select threshold value for judging the error status of signals. A signal error occurs if the value
becomes lower than the specified value. (Factory-set value: 3072)
 0.5V(4096)
 0.375V(3072) : Equivalent to 0.375V0P
 0.25V(2048)
 0.125V(1024) : Equivalent to 0.125V
Transmission interval of ultrasonic signals. (Factory-set value: 5msec)
 5msec to 30msec
AUTION
Function, range or menu
.
PP
: Equivalent to 0.5V0P
: Equivalent to 0.25V0P
0P
*1
. (Factory-set
INF-TN3FLR-E