Campbell SAT ARGOS Bedienungsanleitung PDF herunterladen (Seite 28)

ZENO

-3200 USER MANUAL

Coastal Environmental Systems (206) 682-6048

Page 20

3.1.3. Understanding & Changing the Sample Interval and Power Usage

One of the most important aspects to understand about the ZENO

-3200 is timing. All data collection

done by the ZENO

-3200 is based upon regular timed intervals that are controlled by the ZENO

-3200's

internal clock. The main timed interval is called the Sample Interval.

The Sample Interval defines the overall, recurring period of time that all

data collection, processing, data logging and transmitting occurs.

Three timing values define the Sample Interval. They are located in the Sample Period Menu. Access to

the Sample Period Menu is done through the User Menu. From the User Menu, type S{ENTER} to enter

the Sample Period Menu. Your screen will look something like this:

> s

SAMPLE PERIOD MENU

(Cn/m) Change Item n To Value m (Q) Quit

(E) Save Parameters To EEPROM (H) Help

(U) User Menu

Item 1: 60 (Sample Interval Time)

Item 2: 55 (Sample Duration Time)

Item 3: 0 (Sample Time Offset)

The three values are defined as follows:

 Sample Interval Time defines the length of each complete Sample Interval (the time between the

start of successive Sample Intervals)

 Sample Duration Time defines the portion of the Sample Interval Time that the ZENO

-3200

actually performs all data collection, processing, data logging and transmitting

 Sample Time Offset defines a time at the beginning of the Sample Interval to delay the start of the

actual Sample Duration Time

The sum of the Sample Duration Time and Sample Time Offset can be the

less than or equal to, but never exceed, the Sample Interval Time.

If you attempt to set the Sample Duration Time or the Sample Time Offset or a combination thereof to a

value greater than the Sample Interval Time, the ZENO

-3200 will respond with an error message and not

accept the requested change.

In our example "factory-installed" configuration illustrated above, the Sample Interval Time has been set

to 60 seconds and the Sample Duration Time has been set to 55 seconds. No Sample Time Offset is in

use. This is illustrated using the following timing diagram:

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 393 394

Keine Kommentare

Campbell SAT ARGOS Bedienungsanleitung Seite 28