Smartreader Plus Data Loggers; Voltage Channels - ACR Electronics SmartReader Plus Reference Manual

SmartReader Plus Data Loggers

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Precautions
1. DANGER: High voltage may be present! Do not clamp a current probe around a
conductor without the logger connected to it. This avoids sparking and prevents the
connectors from prematurely deteriorating.
2. The SmartReader Plus 3 is to be used only with approved current probes from Amprobe
Instruments (A60FL, A70FL, A65FL and A75FL). These probes provide low voltage DC
current in proportion to the signal being measured. DO NOT use any other probe unless
approved by ACR in writing.
3. The SmartReader Plus 3 can record current in accordance with the ranges available on
the A60FL, A65FL, A70FL and A75FL probes. Always make sure the current you will be
recording will fall into the appropriate range you set on the current probe.
1.5.3

Voltage Channels

The SmartReader Plus 3 is equipped with three 0-5V DC voltage channels. These channels
allow the user to monitor 3-phase AC voltage. AC voltage is monitored by connecting AC
voltage transducers to the 5V channels.
(See Appendix D Typical SmartReader Plus 3 Connection Diagram
These transducers will provide a DC output proportional to the AC input. The equation editor
in TrendReader software allows displaying this in units of AC voltage. The current and voltage
graphs can also be multiplied together to obtain a graph of VA.
7
A60FL / A65FL
Switch
5
25 2.5 to 25 A
100 10 to 100 A
250 25 to 250 A
A70FL / A75FL
Switch
10
50
250 25 to 250 A
500 50 to 500 A
Current 4
Range Equation
0.5 to 5 A
Range
1 to 10 A
5 to 50 A
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
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Equation
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for more information).