User Manual

EMC
This instrument has been designed to meet the requirements of the EMC Directive 2004/108/EC.
Compliance was demonstrated by meeting the test limits of the following standards:
Emissions
EN61326 (1998) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use. Test limits used were:
a) Radiated: Class B
b) Conducted: Class B
c) Harmonics: EN61000-3-2 (2000) Class A; the instrument is Class A by product category.
Immunity
EN61326 (1998) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use.
Test methods, limits and performance achieved were:
a) EN61000-4-2 (1995) Electrostatic Discharge : 4kV air, 4kV contact, Performance A.
b) EN61000-4-3 (1997) Electromagnetic Field, 3V/m, 80% AM at 1kHz, Performance B*.
c) EN61000-4-11 (1994) Voltage Interrupt, 1 cycle, 100%, Performance A.
d) EN61000-4-4 (1995) Fast Transient, 1kV peak (AC line), 0.5kV peak (RS232 port),
Performance A.
e) EN61000-4-5 (1995) Surge, 0.5kV (line to line), 1kV (line to ground), Performance A.
f) EN61000-4-6 (1996) Conducted RF, 3V, 80% AM at 1kHz, AC line and RS232 port,
Performance A.
*Performance B is specified because at certain frequencies in a high RF field (3V/m), if the
modulation is exactly that of the measurement frequency, there may be some deviation from the
specified accuracy. Note, however, that field strengths as high as 3V/m are typically only found
near deliberate transmitters, e.g. within 1 – 2 metres of a portable phone. In a controlled EM
environment as defined by EN61326 Annexe B (field strength <1V/m) the LCR400 will meet
Performance A criteria.
According to EN61326 the definitions of performance criteria are:
Performance criterion A: ‘During test normal performance within the specification limits.’
Performance criterion B: ‘During test, temporary degradation, or loss of function or
performance which is self-recovering’.
Performance criterion C: ‘During test, temporary degradation, or loss of function or
performance which requires operator intervention or system reset occurs.’
Cautions
To ensure continued compliance with the EMC directive the following precautions should be
observed:
a) after opening the case for any reason ensure that all signal and ground connections are
remade correctly before replacing the cover. Always ensure all case screws are correctly
refitted and tightened.
b) In the event of part replacement becoming necessary, only use components of an identical
type, see the Service Manual.
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