Campbell SAT ARGOS Manual de usuario descargar pdf (Pagina 66)

ZENO

-3200 USER MANUAL

Coastal Environmental Systems (206) 682-6048

Page 58

In this particular case, the total amount of memory for data logging is 127,420 bytes. The size of each

Data Record is 8 bytes. Therefore, the total number of Data Records that can be stored is 15,927, which

is the whole-number quotient of 127,420  8.

The Maximum Data Time Span is the maximum amount of time that the maximum number of Data

Records will fill the available data logging memory. From the example configuration described in

Section 3.1, the Sample Interval is 60 seconds. The product of 60 seconds and 15,927 Data Records is

955,620 seconds, which is the same as 11 days, 1 hour, 27 minutes and 0 seconds. (If Alarm Messages

are also being logged, then the data time span will be less than the maximum calculated value.)

As described in Section 3.1.1:

The available logging memory is treated by ZENOSOFT

as a circular

buffer. Once the circular buffer is full, each newest Data Record overwrites

the oldest Data Record currently stored in the buffer.

Therefore, in this example, once 15,927 Data Records have been logged, the circular buffer will "wrap"

and the newest Data Records will overwrite the oldest Data Records stored in memory.

Another way to think of the Maximum Data Time Span: It is the maximum

time that any single Data Record will be stored by the ZENO

-3200.

You can monitor how many Data Records have been logged at any given time by typing menu option

N{ENTER} in the Data Retrieval Menu. The value that ZENOSOFT

reports will be a number between

0 and the maximum number of logged Data Records. Before the first circular buffer memory wrap, the

number will be less than the maximum number of logged Data Records. Once the circular buffer has

wrapped, the value returned will always be the maximum number of logged Data Records.

4.3. DELETING LOGGED DATA RECORDS

When you no longer want the ZENO

-3200 to store the set of current Data Records, you can delete all of

the logged Data Records by typing D{ENTER} in the Data Retrieval Menu. You will be prompted to

verify that you want to delete all of the logged Data Records.

IMPORTANT: You cannot undo deletion of logged Data Records.

4.4. DATA OUTPUT MESSAGE FORMAT OPTIONS

There are two types of Data Output Messages: real-time data output messages and retrieved data output

messages. You can set the format of each Data Output Message type using two line items available in the

System Functions Menu.

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Campbell SAT ARGOS Manual de usuario Pagina 66