Campbell SAT ARGOS Bedienungsanleitung PDF herunterladen (Seite 176)

ZENO

-3200 USER MANUAL

Coastal Environmental Systems (206) 682-6048

Page 168

Count. When the Sensor Sample Count is set to one, only one measurement for the analog or digital

sensor is taken at each Sensor Timing Loop period.

When the Sensor Sample Count is greater than one, the ZENO

-3200 will

take more than one measurement of the analog or digital sensor and report

the average of all measurements taken.

In Section 10.3.7, an example timing-diagram was made showing a Sample Interval of 20 seconds, a

Sample Duration of 19 seconds and a Sensor Timing Loop period of 2.5 seconds. As an example, you

want to increase the accuracy of an 18-bit ADC sensor. To do this, take three consecutive measurements

at each Sensor Timing Loop period and average them, which will increase accuracy. Setting the Sensor

Sample Count (Line Item #10) to 3 can be illustrated with the following timing diagram:

Sample Interval |---------------------------------------| 20s

Sample Duration |-------------------------------------| | 19s

Sensor Timing Loop ^ ^ ^ ^ ^ ^ ^ ^ 2.5s

Sensor Sample Count ¤¤¤ ¤¤¤ ¤¤¤ ¤¤¤ ¤¤¤ ¤¤¤ ¤¤¤ ¤¤¤ 3

Sensor Reading at each ^

Individual Measurement at each ¤

Care must be taken when setting the Sensor Sample Count in conjunction

with the Sensor Timing Loop period because taking multiple consecutive

measurements increases the time required for each reading of that sensor.

The more time it takes to read an individual sensor, less time is available for

other similar sensor types to get their readings.

Configuration timing issues are explained in detail in Section 12.1.

The default (and minimum) value for the Sensor Sample Count is 1. The maximum value is 255.

10.3.10. Using Switched Voltage To Control Sensor Power

The ZENO

-3200 provides two 5 V DC and three 12 V DC switched, regulated output voltages for

powering sensors.

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Campbell SAT ARGOS Bedienungsanleitung Seite 176