GE DigitalFlow GC868 Programming Manual page 45

Panametrics gas clamp-on ultrasonic flowmeter, 1-channel
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April 2008
Setting Skan/Measure
Parameters
1-36
MEAS
Use the
option to modify the parameters of the Skan/Measure
modes.
IMPORTANT:
MEAS
The
applications. Before changing any of these
parameters, consult the factory.
[F3]
1. Press
to enter the Measurement Settings option.
2. The first prompt asks for the number of cycles in the MEAS R
Window. While this window is normally 24 cycles wide, the option
allows you to customize the width from 1 to 60. Press
accept the current value, or enter a new value and press
[F1]
3. Press
to use both skan and measure times, or
Times only. (The default setting is "Yes".)
[F1]
4. Press
to retain skan, or
GC868 will skip skan except for every 10th reading, when an error
appears, or when the Delta-T exceeds the M>S Switch limit.
5. At the SkanDT>MeasDT Check?, press
determine whether the Skan Delta T is greater than the Measure
[F2]
Delta T, or
to apply the test. (The default setting is "No".)
6. Enter a value (from 0 to 100 µsec) for the Absolute Skan Delta T
to be used in the test in step 5, and press
7. The next prompt, Normalize to 100?, asks if the program will keep
the Skan Delta T within the 0 to 100 range (?), rather than the
actual amplitude. Press
normalize the parameter. (The default setting is "No".)
[F1]
8. Press
to omit measurement of SNR (signal to noise ratio), or
[F2]
to measure SNR. (The default setting is "Yes.")
a. If you measure SNR, the program asks for the Minimum SNR
for Error 4. (The default is 7.0.) Enter the desired value, and
[ENT]
press
.
The GC868 returns to the
default settings are suitable for most
[F2]
[F2]
to Skip Skan. If
[F1]
to omit a test to
[ENT]
. (The default is 4.)
[F1]
to use actual amplitude, or
ADVAN
window.
Programming Site Data
[ENT]
to
[ENT]
.
[F2]
to Use Meas
is selected, the
[F2]
to

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