Smartreader Plus 9 Pulse Logger; Description; How The Smartreader Plus 9 Counts - ACR Electronics SmartReader Plus Reference Manual

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1.12

SmartReader Plus 9 Pulse Logger

The SmartReader Plus 9 is a two-channel multi-purpose counter and logger. With it you can

monitor a wide variety of measurement parameters.

1.12.1

Featuring two input channels configured for easy interface with common switch and

transducer outputs, the SmartReader Plus 9 has the capability to count and record voltage

pulses and switch contact closure frequency. The SmartReader Plus 9 does not have an

internal temperature channel.

1.12.2

The SmartReader Plus 9 has two channels. The channels can count the opening and closing

of external switch contacts and/or the occurrence of DC voltage pulses. Each channel has a

selectable slow or fast input. The SmartReader Plus 9 can only count pulses from one input at

a time on each channel.

The pulse logger can count up to 4095 switch contact closures or pulses over any sampling

interval. For example, if you select a sixteen second sampling interval, the SmartReader Plus

9 can record a maximum of 255 closures per second (4095/16). If the number of closures or

pulses exceeds 4095 during a sampling interval, the logger will record a count of 4095 for that

interval.

The logger keeps track of the number of times a switch opens and closes by continuously

maintaining a voltage potential across the input terminals. Every time the voltage changes

from high to low (i.e. switch closing) and back to high again (i.e. switch opening), the logger

increments its internal counter.

Counting voltage pulses (also called logic inputs) is similar to counting switch contacts, only

SmartReader Plus Data Logger

Figure 9-1: SmartReader Plus 9

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