ACR Electronics OWL 100, Reference Manual, Page: 31 / 55

OWL Data Logger
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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
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, 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 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
ACR representative for availability on these probes.
1.5.4 Specifications
Current Probes
Output Current: 260 µA full scale into 400 ohms.
Cable: 2m (6ft.) length with PVC jacket to IP67 connector.
Accuracy: ±4.0% of full scale above 10% of range
Ranges: The following table lists the usable range available for each
setting.
Table 3-3. Current Probe Usable Ranges
A60FL / A65FL
Equation 206
A70FL / A75FL
Equation 207
Switch Range Switch Range
5 0.5 to 5 A 10 1 to 10 A
25 2.5 to 25 A 50 5 to 50 A