GE DigitalFlow XGS868i Programming Manual page 25

1.8.1 Setting Transducer Signal Parameters (cont.)
Transducer
Signal
Parameters Range
Signal Low
-20 to 100
Limit
Correlation
0 to 500
Peak Limit
Soundspeed
1 to 50%
+- Limit
-500 to 500
Velocity Low ft/sec
Limit (-150 to 150
m/sec)
-500 to 500
Velocity High ft/sec
Limit (-150 to 150
m/sec)
0 to 250ft/s
Acceleration
(0 to 76m/s)
Limit
Amplitude
0 to 100
Discriminator
Low
Amplitude
0 to 100
Discriminator
High
-1000 to
Delta T Offset
1000 μsec
–500 to
Skan T Offset
500 μsec
% of Peak 1 to 100%
DigitalFlow™ XGS868i Programming Manual
Table 4: Transducer Signal Settings
Default
Value
The E1:LOW SIGNAL error message appears when the signal strength falls
20
below the programmed SIGNAL LOW LIMIT value. See Chapter 2 in the
Service Manual for a discussion of error codes.
The E4: SIGNAL QUALITY error message appears when the signal quality falls
100
below the programmed COR. PEAK LIMIT value. See Chapter 2 in the Service
Manual for a discussion of error codes
The E2:SOUNDSPEED error message appears when the calculated fluid
sound speed differs from the fluid sound speed entered in the Channelx-
20%
System menu by more than the programmed SOUNDSPEED +- LIMIT value.
See Chapter 2 in the Service Manual for a discussion of error codes.
The E3: VELOCITY RANGE error messages appears when the calculated fluid
-75.0 ft/sec velocity is less than the programmed VELOCITY LOW LIMIT value.
See Chapter 2 in the Service Manual for a discussion of error codes.
(-23 m/sec)
The E3: VELOCITY RANGE error messages appears when the calculated fluid
75.0 ft/sec
velocity exceeds the programmed VELOCITY HIGH LIMIT value.
See Chapter 2 in the Service Manual for a discussion of error codes.
(23 m/sec)
The E6: CYCLE SKIP error message appears when the calculated fluid velocity
50 ft/s
changes by more than the programmed ACCELERATION LIMIT value from
(15 m/s)
one reading to the next. See Chapter 2 in the Service Manual for a discussion
of error codes.
The amplitude discriminator measures the transducer signal received by the
XGS868. The default value for this parameter is 14, and values from 0 to 100
14
are acceptable. The E5: AMPLITUDE error message appears when the
amplitude discriminator falls below the programmed AMP. DISCRIM LOW
value. See Chapter 2 in the Service Manual for a discussion of error codes.
The amplitude discriminator measures the transducer signal received by the
Model XGS868. The default value for this parameter is 34. Values from 0 to
34
100 are acceptable. The E5: AMPLITUDE error message appears when the
amplitude discriminator exceeds the programmed AMP. DISCRIM HIGH
value. See Chapter 2 in the Service Manual for a discussion of error codes.
An offset between the upstream and downstream transit times is specified
0 μsec
at this prompt.
At this prompt, specify a time measurement offset that compensates for a
58 μsec
shift resulting from cross-correlation.
The percentage of peak used to calculate the transit times and Delta T is
50%
specified at this prompt.
Chapter 1. Programming Site Data
Miscellaneous Information
15