C
hapter
6 – M
aintenanCe
D
iagnoStiC
t
eSting
77
M
icro
‑A
ide
6
The checksum takes only a few seconds to be calculated. The checksum value of 19bb in the previous
example will vary with the version of the firmware installed in the logger.
f
LaSh
M
eMory
t
eSt
(f)
The Flash Memory Test is performed on the memory chip used to store Event Records. The test verifies that
the microprocessor can access the Event Record memory.
A typical response to the Flash Memory Test command is listed in the following.
Flash Memory1: 4096K
Test Complete
Press any key to continue
Flash Memory Test
If the logger has been equipped with larger amounts of Flash Memory the 4096K reference will be
replaced by the references 8192K or 16384K. A failure has been detected if 0K is reported. The readings
should be compared to the known memory capacity of the logger.
gpS r
eCeiVer
t
eSt
(g)
The GPS Receiver Test will check for the presence and operability of the optional GPS Receiver. The test
will report several different messages depending upon the state of the receiver.
If the GPS Receiver has achieved a signal lock with at least four satellites, valid UTC‑0 time and latitude
and longitude coordinates similar to the following will be reported.
GPS Time: 20:42:57.068 is Valid
Location: 34.1044
º
, -117.8783
º
Test Complete
Press any key to continue
GPS Receiver Test ‑ Signal Acquired
A signal lock with one to three satellites allows the GPS Receiver to report a valid UTC‑0 time. In such
cases latitude and longitude coordinates of 0.0000º will be reported. Irrespective of the reported latitude
and longitude coordinates, if the test reports Valid the GPS Receiver option is reporting an accurate
UTC‑0 time.
If the GPS Receiver is installed but has not as yet achieved, or is unable to achieve, a signal lock with any
satellite, the following will be reported.
GPS Time: 23:59:44.000 is Not Valid
Location: 0.0000º, 0.0000º
Test Complete
Press any key to continue
GPS Receiver Test ‑ Signal Not Acquired
If the GPS Receiver has failed completely or is not installed the following message will be reported.
GPS Receiver not installed
Test Complete
Press any key to continue
GPS Receiver Test ‑ Not Installed
Summary of Contents for CWR-24E
Page 2: ......
Page 14: ...VDL S7 300 User Manual 6 Micro Aide 1 User Notes ...
Page 22: ...VDL S7 300 User Manual 14 Micro Aide 2 User Notes ...
Page 96: ...VDL S7 300 User Manual 88 Micro Aide A User Notes ...
Page 98: ...VDL S7 300 User Manual 90 Micro Aide B User Notes ...
Page 106: ...VDL S7 300 User Manual 98 Micro Aide C User Notes ...