Cameron NUFLO MC-III EXP, Руководство пользователя

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B-5
MC-III™ EXP Flow Analyzer Appendix B
the device on, and then waits the specified length of time before attempting to transmit data. By default, this
parameter is set to zero.
Number of Retries
By default, the computer will make two attempts to connect to the MC-III EXP before providing an error
message. In situations where timeouts are anticipated—for example, due to a slow-speed computer—the
user can increase the length of time allowed for a connection by inputting a larger number in the Number of
Retries field. See
Figure B.4, page B-3.
Timeout Period Type
A user can select an “optimal” timeout, which is based on the response time of the MC-III EXP to various
requests for data at all baud rates during extensive testing, or a “fixed” timeout determined by the user. By
default, the “optimal” period type is enabled. When a communication error occurs, the “optimal” timeout
allows the software to respond much faster than the more conservative fixed timeout. The optimal setting
is recommended when the software is connecting directly to the instrument. The “fixed” timeout type is
recommended when data is being transmitted through a radio or other network device (serial to TCP/IP) and
there are recognizable delays in the communication system. See
Figure B.4, page B-3.
Timeout Period
When a “fixed” timeout period type is selected, the user enters the timeout period value (in milliseconds) in
the Timeout Period field. When an “optimal” timeout period type is selected, the user can use this field to
enter a percentage by which the “optimal” timeout period is extended. This extension can be advantageous
when connecting to a slow computer. See
Figure B.4, page B-3.
Downloading Options
The MC-III EXP automatically saves daily flow logs on the contract hour, and hourly flow logs around the
clock. The instrument also automatically saves an event log each time a user change is made. By default, the
logs are saved as .csv files. The Downloading Options screen (Figure B.5) allows a user to change the format
of the auto-save flow logs and event logs to Excel (.xls) files.
Figure B.5—Menu for changing the auto-save log file format