Smartreader Plus 3 Current, Voltage And Temperature Logger; Description - ACR Electronics SmartReader Plus Reference Manual

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SmartReader Plus Data Loggers

1.5

SmartReader Plus 3 Current, Voltage and Temperature Logger

The SmartReader Plus 3 is a versatile equipment performance logger. It monitors and

records AC current and voltage.

1.5.1

The SmartReader Plus 3 has four current-monitoring channels, three 0-5 VDC inputs for

connection to AC voltage transducers, and one internal thermistor temperature channel. The

current-monitoring channels are used with external clamp-on-current probes to measure and

record alternating current.

The following current probes from Amprobe Instruments are compatible with the SmartReader

Plus 3:

· A60FL and A70FL for 60Hz power systems

· A65FL and A75FL for 50Hz operation

Use of these probes allows you to measure alternating current of conductors without the need

for breaking circuitry. For information on current ranges and resolutions possible with the

SmartReader Plus 3, refer to the

Current Channel Operation

The SmartReader Plus 3 measures electric current through external current probes. Each

current probe is a transformer with its internal coil serving as the secondary winding and the

current-carrying conductor being measured serving as the primary winding. The output of the

probe (which is the input to the SmartReader Plus 3) is conditioned through internal circuitry.

The probe produces an output of approximately 260 microamps full scale for each range

available on the current probe. Readings from the current probe are scaled into amperage

units through equations (in TrendReader software) that match the current probe and its range

setting.

Figure 3-1: SmartReader Plus 3

Specifications

in this chapter.

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