Banner DF-G1-PR-Q7 Instrukcje Operacyjne Strona 110

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6 – Operation software
DPN 402197 © TSS (International) Ltd Page 31 of 32
6.5 QUALITY CONTROL
The Quality Control function of the 350 System defines an envelope within which the
measurements meet the specifications for accuracy listed in Section 8.
Whenever the co-ordinates of the target fall outside the limits of the Quality Control
envelope, the following occurs:
The target shown on the Run Display screen changes colour.
A message appears on the screen to identify the reason for quality control failure.
The output strings to an external data logger include the quality control indicator
and identification number. The two-digit identification number allows post-process-
ing engineers to identify the quality control failure. Refer to sub-section 7.3.1 for
details of the QC check code.
The audible alarm on the SDC sounds (if you have enabled this feature).
The extremities of the Quality Control envelope are as follows:
A) Lateral extremities:
If the target falls outside a swath range of ±2.0m from the centre of the coil array, then
the Quality Control flag will be set. These extremities appear on the Run Display
screen as two vertical broken red lines.
B) Vertical extremity:
If the signal strength on either of the lateral sensing coils falls to below 50µV, then the
Quality Control flag will be set.
The quality control flag does NOT mean that the measurements contain errors. It
merely indicates to the post-processing team that the vertical range to target or the lat-
eral offset has exceeded pre-defined limits. The post-processing engineers can use
this flag to help them analyse the acquired data more easily.
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