DigitalFlow™ GF868 Programming Manual (2-Channel)
19
Chapter 1. Programming Site Data
1.6.5a Setting Signal Limits (cont.)
18.
Press
[ENT]
to accept the current
R Window (Cycles)
value or enter a new value and press
[ENT]
.
Normally, the Model GF868 calculates the size of the receive window based on pipe size and fluid sound speed.
However, for special diagnostic purposes, it may sometimes be necessary to reset the window size. The default value
for this parameter is 10 and values from 10 to 300 are acceptable.
Note:
If the T WINDOW prompt is set to 0, the R WINDOW prompt does not appear, and the GF868 uses a R
WINDOW Width based on the expected arrival of the signal.
After completing these steps, the program returns to the
SETUP
window.
Table 5: Default Values and Limits for SETUP Parameters
Parameter
Default Value
Low Limit
High Limit
Signal Low Limit
20
-20
100
Cor. Peak Limit
100
0
500
Velocity Low Limit
-300.0 ft/sec (-85 m/sec)
-500 ft/sec (-150 m/sec)
+500 ft/sec (+150 m/sec)
Velocity High Limit
300.0 ft/sec (85 m/sec)
-500 ft/sec (-150 m/sec)
+500 ft/sec (+150 m/sec)
Acceleration Limit
100.0 ft/sec
2
(30.48 m/sec
2
)
0
250 ft/sec
2
(76 m/sec
2
)
Amp. Discrim Low
14
0
100
Amp. Discrim High
34
0
100
Delta T Offset
0
-1,000
μ
sec
1,000
μ
sec
Skan T Offset
58
μ
sec
-500
μ
sec
500
μ
sec
% of Peak
50%
1%
100%
XMIT Sample Size
8
2
32
M>S Switch
50
μ
sec
0
μ
sec
250
μ
sec
# shifts
3
0
10
A Divisor
2.5
0.1
10
# Transmit Pulses
4
1
16
T Window
0
0
1,000
R Window
10
10
300
Содержание DigitalFlow GF868
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