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SmartReader Data Logger

software. The sampling rate you select will apply to all enabled channels. At a sample rate of

eight seconds, one reading is taken every eight seconds and saved to memory. As you slow

the sample rate the logger begins to average readings before saving them to memory. To do

this the logger takes a reading every eight seconds, but instead of transferring this directly to

the logger's memory, it stores the readings in a buffer (a temporary memory) where it is

retained until the sampling interval is over.

When you backup a logger's data into your computer, the correct time and date are referenced

to each reading. All readings are then individually time and date stamped and processed by

an equation associated with each logger channel. The result is a collection of accurate

time-based data ready for detailed graphing and analysis.

1.1.5 How to Use SmartReaders

Using your SmartReader data logger for most applications is a simple process. With proper

planning, setup and installation of your data logger, you can be assured that the information

you collect will be both correct and useful. The following provides general procedures for

using SmartReader data loggers. For additional and specific information on these steps, refer

to the chapter in this manual that deals with your particular SmartReader model.

Planning

Proper planning is the key to successful data logging. Time spent in this stage will help you

save time and frustration later. To help you plan, answer these questions:

· What exactly do I want to measure?

· Where is the best place to measure?

· How long do I want to monitor for?

· Should other variables be monitored simultaneously?

Setup

To set up your SmartReader data logger you must first have TrendReader software installed

and running on your computer. You can then configure your logger with various options by

talking to it via the interface cable.

Set Sample Rate

Always confirm the sampling rate (how often the logger takes readings) to make sure it will be

acceptable for your application. You can alter the frequency at which your SmartReader data

logger records readings by changing the sample rate. You can choose rates from 8 seconds

to 5 days. The sample rate chosen will apply to all the active channels on the logger.

To help determine which sampling rate you should choose, answer these questions:

· How long do I need to record data?

· How much time will elapse between when I retrieve the logger and download the data to

my computer (for example, the trip back to the office)?

· How often do readings need to be taken?

Making External Connections

If you are using your SmartReader data logger to monitor external modules, sensors, or

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ACR Electronics SmartReader Plus Manuale Utente Pagina 11