99-MAN 100135.v9 07/13
OPERATION
Please make sure that you have already read and fully understand the WARNING section on page 1.
Making Measurements with the AC Current Probe Model SR651/SR652
Connect the black lead of the current probe to “C ommon” and the red lead to the AC voltage input on
your DMM or other voltage-measuring instrument. The AC current probe has a ratio of 1000:1. This
means that for 1000A AC in a conductor around which the probe is clam ped, 1V AC w ill come out of
the probe leads to y our DMM or instrument. The output is 1mV
AC
/A
AC
. Select the range w hich
corresponds to the measured current. If the current magnitude is unknow n, start w ith the highest
range and work down until the appropriate range and resolution are reached. Clamp the probe around
the conductor. Take the reading on the meter and multiply it by 1000 to obtain the measured current
(e.g, 260mV reading = 260 x 1000 = 260,000mA or 260A).
For best accuracy, avoid if possible, the proximity of other conductors which may create noise.
Tips for Making Precise Measurements
When using a current probe w ith a meter, it is im portant to select the r ange that prov ides the best
resolution. Failure to do this may result in measurement errors.
Make sure that probe jaw mating surfaces are free of dust and contamination. Contaminants cause air
gaps between the jaw s, increasing t he phase shift betw een primary and se condary. It is v ery critical
for power measurement.
MAINTENANCE
Warning:
For maintenance use only original replacement parts.
To avoid electrical shock, do not attempt to perform any servicing unless you are qualified to do so.
To avoid electrical shock and/or damage to the in strument, do not get water or other foreign agents
into the probe.
Cleaning:
To ensure optimum performance, it is important to keep the probe jaw mating surfaces clean at
all times. Failure to do so may result in error in readings. To clean the probe jaws, use very fine sand paper
(fine 600) to avoid scratching the jaw then gently clean with a soft oiled cloth.
LIMITED WARRANTY
The current probe is warranted to the owner for a period of one year from the date of original purchase
against defects in manufacture. This limited warranty is given by AEMC
®
Instruments, not by the distributor
from whom it was purchased. This warranty is void if the unit has been tampered with, abused or if the
defect is related to service not performed by AEMC
®
Instruments.
Full warranty coverage and product registration is available on our website at:
www.aemc.com/warranty.html
.
Please print the online Warranty Coverage Information for your records.
AC Current Probe
Models SR651 and SR652
User Manual
DESCRIPTION
The Models SR651/SR652 (Catalog #2113.45 and #2113.46)
are designed for use in
industrial
environments. The ergonomic design allo ws them to easily attach to cables or small bus bars. The
“circular” jaws guarantee a v ery good accuracy and low phase shift. T he probes hav e a m easurement
range up to 1000Arms continuous and are
compatible with any AC v oltmeter, multimeter, or other
voltage measurement instru ment that has the fo llowing features: Range and resolution capable of
displaying 1mV of output per amp of measured current; voltmeter accuracy of 0.75% or better.
WARNING
The safety warnings are prov ided to ensure t he safety of personnel and proper operation of the
instrument. Read the instruction completely.
• Use caution on any circuit: potentially high voltages and currents may be present and may pose
a shock hazard.
• Do not use the probe if damaged. Always connect the current probe to the measuring device
before it is connected around the conductor
• Do not use on non-insulated conductor w ith a potential to ground greater than 600V C AT III
pollution 2. Use extreme caution when clamping around bare conductors or bus bars.
• Before each use, inspect the probe; look for cracks in housing or output cable insulation.
• Do not use clamp in wet environment or in locations that hazardous gases exist.
• Do not use the probe anywhere beyond the tactile barrier.
INTERNATIONAL ELECTRICAL SYMBOLS
This symbol signifies that the current probe is protected by double or reinforced insulation. Use
only factory specified replacement parts when servicing the instrument.
This symbol signifies CAUTION! and requests that the user refer to the user manual before
using the instrument.
This is a type A current sensor. This symbol signifies that application around and removal from
HAZARDOUS LIVE conductors is permitted.
DEFINITION OF MEASUREMENT CATEGORIES
CAT I:
For measurements on circuits not directly connected to the AC supply w all outlet such as
protected secondaries, signal level, and limited energy circuits.
CAT II:
For measurements performed on circuits directly connected to the electrical distribution sy stem.
Examples are measurements on household appliances or portable tools.
CAT III:
For measurements performed in the building inst
allation at the distribution lev el such as on
hardwired equipment in fixed installation and circuit breakers.
CAT IV:
For measurements performed at the primary
el ectrical supply (<1000V) such as on primary
overcurrent protection devices, ripple control units, or meters.
RECEIVING YOUR SHIPMENT
Upon receiving your shipment, make sure that the c ontents are consistent w ith the packing list. Notify
your distributor of any missing items. If the equipment appears to be damaged, file a claim immediately
with the carrier and notify your distributor at once, giving a detailed description of any damage.
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