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Range
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 OWL Electric Current logger can only be used with current probes from ACR Systems (altered
Amprobe Instruments models A60FL, A70FL, A65FL and A75FL). These probes provide low
voltage DC current in proportion to the signal being measured. They have a convenient snap
connector added to protect against harsh environments.
4.3
Current Probes and Accessories
OWL Electric Current loggers come with a choice of current probes modified to plug into the logger
with no tools. 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 effective splitting of a two-line conductor, making
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 British fuse plug adapter. Contact your local ACR
representative for pricing and delivery of this product.
High Currents
Monitor current ranges higher than those available on the standard probe by using it with an additional
transformer. For this purpose Amprobe Instruments has available their Deca-Tran 10-to-1 Transformer
(to monitor currents up to 600 amps) or, for even high measurements, their Amptran® CT50-2 a 50 to
1 transformer (to monitor currents up to 3000 amps). Contact your ACR representative for availability
on these probes.
© 2001 ... ACR Systems Inc.
A60FL / A65FL
Equation 206
Switch
0
5
1
25
2
100
3
250
OWL Electric Current Data Logger
Full Scale
Switch
5.438 A
10
27.19 A
50
108.8 A
250
271.9 A
500
A70FL / A75FL
Equation 207
Full Scale
10.88 A
54.38 A
271.9 A
543.8 A
19
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