GeoSIG AS-12, Руководство пользователя

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GeoSIG Ltd. GS_GSR_GCR_UserManual_V21.doc / 18.09.2009
Page 22 GSR / GCR / AS User Manual
▪ Check the location of the sensor. Some noise sources such as machines, wind or dripping
water may affect the sensor.
▪ Check the sensor cable and its connectors. A wire may have been interrupted.
The
Zero Level
test observes the analog input levels before and after a test pulse has been sent to
the sensor/filter. If either of these levels do not correspond to the expected zero level, a
Warning
will
appear.
▪ Check the sensor cable and its connectors. A wire may have been interrupted.
The
No Sensor
test monitors the input levels of every channel, and if one of these inputs reads the
maximum or minimum value for a longer period of time, an
Error
will appear. GSR and AS instruments
keep all their functionality in case of this error.
▪ Check the sensor cable and its connectors. A wire may have been interrupted.
A test signal source is built into the Instrument to allow testing of accelerometers and analog circuits.
The
Analog Response
test applies a test pulse to the sensor and to the filter input. The responding
analog signal is digitised and analysed. If the level measured is not within an expected range in
reference to its zero level, a
Warning
will appear.
▪ Check the levelling of the sensor.
▪ Check the sensor cable and its connectors.
▪ The analog filter of the recorder unit may be defective, contact GeoSIG or your local
representative.
The
ADC Resolution
test monitors every value read from the AD Converter during system test. If any
value is outside the expected range, a
Warning
will appear.
▪ The AD converter may have malfunctions. Run the Self Test again to see if the Warning flag
remains set. If yes, contact GeoSIG or your local representative.
The
ADC Conversion Time
test checks the time spent to read each value from the AD Converter
during test. If the time exceeds an acceptable value, an
Error
will appear.
▪ The AD converter may have malfunctions. Run the Self Test again to see if the Warning flag
remains set. If yes, contact GeoSIG or your local representative.
6.1.2. Hardware
If "Hardware" test is selected, the following test routines will be performed:
The
EPROM Checksum
test reads the firmware program of the Instrument stored in the EPROM and
calculates its Checksum. An incorrect checksum yields a
Warning
.
▪ The stored firmware is probably not anymore in its original form. Run the Self Test again to see
if the Warning flag remains set. If yes, contact GeoSIG or your local representative.
The
EEPROM Checksum
test reads the Instrument configuration parameters stored in the EEPROM
and calculates its Checksum. An incorrect checksum yields a
Warning
.
▪ A data corruption has probably occurred in the EEPROM. Run the Self Test again to see if the
Warning flag remains set. If yes, reset the instrument configuration to the factory default values
(refer to the GeoDAS manual). Clear the Warning Flag and run the Self Test again.