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INF-TN1FSH-E
Item
Input method
Function and range or menu
Setting of control method of measurement window that takes in signals
(Factory-set value: AUTO)
Window
control
Selection
•
AUTO
•
MANUAL
Set the time of starting taking in signals (period from the start of transmission
until the startup of window signals)
Numeric
value
•
Open time (F): 1
µ
s to 16383
µ
s
Numeric
value
•
Open time (R): 1
µ
s to 16383
µ
s
Note: (F): Forward direction, (R): Reverse direction
Select (F) and (R) in manual mode.
Saturation
The number of times that the amplitude of received signals fluctuates and
exceeds
±
1.6V (saturation) per 1 flow rate signal output*
1
. Used as a
threshold value for judgment of signal error. A signal error occurs if the
specified number of times are exceeded. (Factory-set value: 32 times)
Numeric
value
•
0 to 256
Measurement
method
Setting of measurement method for measuring transit time (Factory-set value:
Method 2)
Selection
•
Method 1: method strong against interference
•
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.
Signal balance
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%)
Numeric
value
•
0% to 100%
Note: Set to 50% or higher for Method 1.
Transmission
pattern
Setting of transmission pattern of ultrasonic signals (Factory-set value: Burst
3)
Selection
•
Burst 1, Burst 2, Burst 3, Burst 4, Burst 5, Chirp 4, Chirp 8
AGC gain
Setting of control method of signal AGC gain (Factory-set value: Auto)
Signal peak is controlled to be kept at 2.4Vpp.
Selection
•
AUTO
•
MANUAL
Make the setting so that the signal peak in both forward and reverse
directions is kept at 2.4 Vpp.
Numeric
value
•
Gain in forward direction: 1.00% to 99.00%
•
Gain in reverse direction: 1.00% to 99.00%
Signal peak
Setting of signal peak threshold value per 1 flow rate signal output*
1
. Used
as the 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: 3071)
•
5120: 1.0V
0P
or equivalent
•
4096: 0.8V
0P
or equivalent
•
3071: 0.6V
0P
or equivalent
•
2048: 0.4V
0P
or equivalent
TRANS.
WAIT TIME
Numeric value
Setting of transmission interval of ultrasonic signals
•
1 to 30 msec
*1) Forward-direction signals are taken in with forward total time measurement, while reverse-direction signals are
taken in with reverse total time measurement. They are conducted alternately for the transmission count.
Forward and reverse signal data is added for the transmission count and averaged. The result is 1 output of signal
in forward/reverse direction.
