Vaisala Spectrum 4.0 - Manual (Page 72)

Troubleshooting
66
Serial Port Problems
If you are experiencing difficulties communicating with Veriteq data loggers,
here are some tips and things to try before calling Veriteq Instruments.
Software Error Messages you May Encounter…
Unable to allocate COM port because it is busy
This error message means that Spectrum was unable to allocate the COM port
because it was already allocated by a different program. You may have to wait
until the COM port becomes available.
Unable to allocate COM port because it is unavailable
This error message means that Spectrum was unable to allocate the COM port
because it did not exist in the operating system. Check your available COM
ports.
Unable to receive sync byte from COM port
This error message means that Spectrum sent a request message to the data log-
ger, but did not receive any response from the data logger. This could mean the
data logger is unplugged or the cable is not connected properly.
Unable to receive all of the bytes from COM port
This error message means that Spectrum sent a request message to the data log-
ger, but received an incomplete response message from the data logger. This
may mean there is a problem with the COM port on this PC, a problem with the
cable, or a problem with the logger itself. Check these possibilities.
Unable to communicate with logger on COM port
This error message covers miscellaneous error conditions, other than those list-
ed previously. This message could mean that there is a problem with the COM
port on this PC, a problem with the cable, or a problem with the logger.
Things to Try:
1. Does the logger and interface cable work on a different PC? If so, the prob-
lem likely resides in the serial port configurations on the PC.
2. Are there other devices (such as a mouse) that use the serial port in question
without problems? If so, that port is likely not the problem.
3. Can you transfer data using a different interface cable? If so, the cable may
be damaged.
4. Can you transfer data using a different logger (with the same interface ca-
ble)? If so, the data logger may be damaged.
Invalid hardware model
This error message means that Spectrum did not recognize the hardware model
of the data logger, and as a result, did not know how to interpret the information