ACR Electronics SmartReader Plus Manual do Utilizador Página 30

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SmartReader Data Loggers
22
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
25
2.5 to 25 A
64
100
10 to 100 A
65
250
25 to 250 A
66
A70FL / A75FL
Switch
Range
Equation
10
1 to 10 A
67
50
5 to 50 A
68
250
25 to 250 A
69
500
50 to 500 A
70
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 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 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 Current Probes and Accessories
Each SmartReader 3 has three pairs of input connections for use with the Current Probes
from Amprobe Instruments. These clamps can be used with a number of accessories to fit
most typical applications.
Low Currents
To log very low currents (such as monitoring the operation of electrical appliances), the probe
can be used with a Line Splitter. The Amprobe A47L Energizer multiplies the signal to the
logger by ten times over a range of 0.1 to 15A. It also allows effectively splitting of a two-line
conductor, allowing measurements without the need to enter electrical panels or junction
boxes.
For European applications, Amprobe's model A47CL is available with screw-in European
round prongs, two extra British-type prongs and a British fuse plug adapter. Contact your local
ACR representative for pricing and delivery of this product.
High Currents
You can monitor current ranges higher than those available on a standard probe by using it
with an additional transformer. For this purpose Amprobe Instruments has available their
Amptran® CT50-2 a 50-to-1 transformer (to monitor currents up to 3000 amps). Contact your
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