AC Current Probe
Model MN375
User Manual
DESCRIPTION
The MN375 (Cat. #2115.41) is the latest in compact AC current probes. Designed to meet the most
stringent demands in industry and electrical contracting, it also meets the latest safety and performance
standards. This probe has a measurement range up to 10 Arms and is compatible with any AC voltmeter,
multimeter, or other voltage measurement instrument that has the following features: Range and
resolution capable of displaying 100 mV of output per amp of measured current; Voltmeter accuracy of
0.7 % or better to take full advantage of the accuracy of the probe; Input impedance of ≥ 1 MΩ.
WARNING
These safety warnings are provided to ensure the safety of personnel and proper operation of the
instrument.
•
Read the instruction manual completely and follow all the safety information before attempting to
use or service this instrument.
•
Use caution on any circuit: Potentially high voltages and currents may be present and may pose a
shock hazard.
•
Read the Safety Specifications section prior to using the current probe. Never exceed the
maximum voltage ratings given.
•
Safety is the responsibility of the operator.
•
ALWAYS connect the current probe to the display device before clamping the probe onto the
sample being tested.
•
ALWAYS inspect the instrument, probe, probe cable, and output terminals prior to use. Replace
any defective parts immediately.
•
NEVER use the current probe on electrical conductors rated above 250 V. Use extreme caution
when clamping around bare conductors or bus bars.
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.
Thi
s symbol signifies CAUTION! and requests that the user refer to the user manual
before using the instrument.
T
his symbol signifies that this is a type A current sensor and that application near and
removal from HAZARDOUS LIVE conductors is permitted.
DEFINITION OF MEASUREMENT CATEGORIES (CAT)
CAT IV
corresponds to measurements performed at the primary electrical supply (< 1000 V).
Example: primary overcurrent protection devices, ripple control units, and meters.
CAT III
corresponds to measurements performed in the building installation at the distribution level.
Example: hardwired equipment in fixed installation and circuit breakers.
CAT II
corresponds to measurements performed on circuits directly connected to the electrical
distribution system.
Example: measurements on household appliances and portable tools.
RECEIVING YOUR SHIPMENT
Upon receiving your shipment, make sure that the contents are consistent with 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.
