Lake Shore Model 218 Temperature Monitor User’s Manual
C
Electromagnetic Compatibility (EMC) for the Model 218 Temperature Monitor
Electromagnetic Compatibility (EMC) of electronic equipment is a growing concern worldwide.
Emissions of and immunity to electromagnetic interference is now part of the design and manufacture
of most electronics. To qualify for the CE Mark, the Model 218 meets or exceeds the generic
requirements of the European EMC Directive 89/336/EEC as a
CLASS A
product. A Class A product
is allowed to radiate more RF than a Class B product and must include the following warning:
WARNING: This is a Class A product. In a domestic environment, this product may
cause radio interference in which case the user may be required to take
adequate measures.
The instrument was tested under normal operating conditions with sensor and interface cables
attached. If the installation and operating instructions in the User’s Manual are followed, there should
be no degradation in EMC performance.
Pay special attention to instrument cabling. Improperly installed cabling may defeat even the best
EMC protection. For the best performance from any precision instrument, follow the grounding and
shielding instructions in the User’s Manual. In addition, the installer of the Model 218 should consider
the following:
• Leave no unused or unterminated cables attached to the instrument.
• Make cable runs as short and direct as possible.
• Do not tightly bundle cables that carry different types of signals.
• Add the clamp-on ferrite filters (Part Number 9009-020) included with the connector kit to the
sensor input cables near the instrument rear panel.