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SmartReader Data Logger

1.16

APPENDIX D Sample Rates

Sample Rates

1.16.1 How a Data Logger Stores Readings

The sample rate of your data logger is the frequency with which it stores readings in its

memory. A selected sample will apply for all channels on a SmartReader.

If you set your data logger's sample rate to eight seconds, it reads its input channels and

stores the readings once every eight seconds. If you choose a sample rate longer than eight

seconds, the logger still reads its input channels once every eight seconds, and stores an

averaged reading at the end of the sample interval you have chosen.

For example, if you use a two-minute sample rate, the data logger takes fifteen separate

readings over each two-minute interval. At the end of each two-minute interval, the logger

calculates the average of the fifteen readings, and stores that average in its memory.

1.16.2 Sample Rate Tables

The following tables list the maximum time spans over which your SmartReader will record

readings. The time spans depend on the number of channels enabled and the length of the

sample rate. A SmartReader has a memory capacity of 32,767 readings.

In each table, the Sample Rate column lists the available sample rates. The Days, Hours,

Minutes and Seconds columns list the time spans over which your logger will record readings

at each sample rate.

For example, a SmartReader with two channels enabled, using a sample rate of ten minutes,

will store readings for 113 days, 18 hours and 40 minutes. After that time, depending on how

it was set up, the logger will either continue to take readings and replace the oldest readings

with the new readings, or it will stop taking readings.

Table E-1: SmartReader Sample Rate - One Channel Enabled

Sample Rate

Days

Hours

Minutes

Seconds

8 sec.

16 sec.

32 sec.

56 sec.

2 min.

4 min. 56 sec.

112

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ACR Electronics SmartReader Plus Bedienungsanleitung Seite 97