GE Panametrics GF868 Programming Manual page 34

Setting Signal Limits
(cont.)
Programming Site Data
7. Press [ENT] to accept the current Amp. Discrim High value or
enter a new value and press
IMPORTANT: Consult the factory before performing this step.
The amplitude discriminator measures the size of the transducer
signal received by the Model GF868. The default value for this
parameter is 34 and values from 0 to 100 are acceptable. The
error message appears when the amplitude
AMPLITUDE
discriminator exceeds the programmed
See the Service Manual for a discussion of error codes.
8. Press to accept the current Delta T Offset value or enter a
[ENT]
new value and press
[ENT]
IMPORTANT: Consult the factory before performing this step.
An offset between the upstream and downstream transit times is
specified at this prompt. The default value for this parameter is 0 µsec
and values from –1000 to 1000 µsec are acceptable.
9. Press [ENT] to accept the current Skan T Offset value or enter a
new value and press [ENT]
At this prompt, specify a time measurement offset that compensates
for any shift resulting from cross-correlation. The default value for
this parameter is 58 µsec and values from –500 to 500 µsec are
acceptable.
Note: If you enter a value of 0 for this command, you enable a
special mode of operation, ACTIVE SKAN T-OFFSET, that
dynamically calculates the offset.
10.Press [ENT] to accept the current % of Peak value or enter a new
value and press
[ENT]
The percentage of peak used to calculate the transit times and Delta T
is specified at this prompt. The default value for this parameter is
50% and values from 1 to 100% are acceptable.
11. Use the [→] and [F1]-[F4] keys to select one of the preset values
for the XMIT Sample Size from the option bar.
IMPORTANT: Consult the factory before performing this step.
.
[ENT]
AMP. DISCRIM HIGH
.
.
.
March 2003
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value.
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