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Before You Start
Using Clamp-On Ferrites
5
CE Comments1.4
EMC Directive1.4.1
Hart Scientic’s equipment has been tested to meet the European Electromagnetic Compatibility Directive
(EMC Directive, 2004/108/EC ). The Declaration of Conformity for your instrument lists the specic stan-
dards to which the unit was tested.
The instrument was designed specically as a test and measuring device. Compliance to the EMC direc-
tive is through EN 61326-1:2006 Electrical equipment for measurement, control and laboratory use – EMC
requirements
As noted in the EN 61326-1, the instrument can have varying congurations. The instrument was tested in a
typical conguration with shielded RS-232 cables.
Immunity Testing1.4.2
The instrument was tested to the requirements for laboratory locations.
Using Clamp-On Ferrites1.5
Clamp-on ferrites are provided for use in improving the instrument’s electromagnetic (EM) immunity in envi-
ronments of excessive EM interference, like areas of heavy industrial equipment. We recommend placing the
ferrites on the cables of probes attached to the instrument.
To attach a ferrite to a probe cable, make a loop in the cable near the connector and clamp the ferrite around
half of the loop as shown in the diagram. The ferrite can be easily detached and moved to a new probe when
needed. (See Figure 1 on next page.)