QUICK START
GDP-32
24
Section 4, Page 7
September 2015
4.4
SYSTEM CHECK
The SYSCHK program checks the performance of the analog cards, as well as the overall
operation of the GDP-32
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. It confirms analog card consistency while acquiring data, as well as
any performance drift since the last calibration. This check should be performed before and after
any field job in order to ensure that the data collected is of the highest quality. To start the
system check program press
from the Zonge Logo screen.
The system check can be performed with various parameter settings in order to run either a quick
check, or a more stringent check of the system. For a quick check, the following parameters can
be set. These settings should provide a quick Go-NoGo run without the need to closely inspect
the overall data. Any suspected error will halt the automatic progression through the
frequencies, of the AUTO METHOD, and signal the operator with an audible warning. The
system should then be investigated more closely to confirm and identify and real problem. See
the System Check section of this manual for more information.
FREQ
Set to the lowest frequency to be used for the job.
CYCLES
At least 2 cycles for the lowest frequency.
STACKS
At least 2, in order to quickly check analog card repeatability.
AGAIN
Set to MAN for speed.
NOTCH
Set to OUT. Notch filters can cause wide variability around harmonic
frequencies of the filter. Setting filters OUT, will minimized the chance of the
automatic sequencing stopping for false errors, allowing for lower detection
limits to be set.
VOLTS
Set to 0.01 v. A low voltage such as this can help magnify any errors in the
analog cards.
GROUP
This will be set automatically for this purpose. Stacks of data will be
averaged by group for comparison with the Data Viewer. Different Groups
collected at different times can then be compared to find any change in the
system.
METHOD
Set to AUTO.
dθ LIM
Set to 0.1. Without NOTCH filters, this should provide a good check. With
NOTCH filters a setting of 1 is appropriate.
dCal% L
Set to 1. Without NOTCH filters
After the settings are made, press
to proceed with the test. When finished, press
to return to the Zonge Logo screen.
Enter
