ACR Electronics SmartReader Plus Manual de usuario descargar pdf (Pagina 10)

SmartReader Data Loggers

1.1.2 Description

SmartReader loggers can run continuously, constantly measuring and recording readings from

any enabled channel. They can also start logging at a specified time. Self-powered by a

long-life lithium battery that will provide years of reliable operation, your SmartReader can

work independently from any external power supply or computer. When you are ready to look

at the data it has collected, it can transfer all information to your computer through the use of

TrendReader software.

Main Components

The main components of the SmartReader data loggers include:

· a memory chip that has the capacity to store up to 32,768 readings

· a microprocessor with an 8-bit analog-to-digital converter (A/D) that converts all input

signals to digital values

· a quartz clock crystal that accurately keeps track of time and regulates the taking of

readings

· an accurate on-board thermistor that the logger uses to measure ambient temperature

via changes in resistance

· a lithium battery that provides power to the logger and internal or external sensors.

1.1.3 Programmed Operation

SmartReader data loggers run according to settings that you program. These pre-selected

settings are stored in the logger's memory chip and instruct it to:

· take readings at regularly-spaced intervals

· take readings from specific channels that you enable

· associate each channel with an equation in TrendReader software

· start readings with or without a delay

· take readings continuously, or stop when memory is full

1.1.4 How SmartReaders Loggers Take Readings

Each SmartReader data logger has an on-board thermistor that you can use to record ambient

temperature. Depending on which SmartReader model you have, you can turn this

temperature-monitoring capability on or off using software. You can also record other

information by connecting sensors, transducers or external circuitry to the plug-in terminal

block.

SmartReaders can record up to 32,768 readings in two selectable modes:

1. First-in, First-out (FIFO). In this mode the logger continues to take readings when its

memory is full (to make room, it discards the oldest reading every time it adds a new

one). Thus, the memory will contain a "sliding window" of information.

2. Stop when Full. The logger stops recording when its memory is full.

You can set the time interval at which your logger saves readings using TrendReader

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ACR Electronics SmartReader Plus Manual de usuario Pagina 10