Emc - TTI 1604 Service Manual

The following symbols are used on the instrument:
This multimeter has been designed to meet the requirements of the EMC Directive 89/336/EEC.
Compliance was demonstrated by meeting the test limits of the following standards:
Emissions
EN50081-1 (1992) Generic emission standard for residential, commercial and light industry. Test
methods and limits used were:
a) EN55022 Conducted, Class B
b) EN55022 Radiated, Class B
Immunity
EN50082-1 (1992) Generic immunity standard for residential, commercial and light industry.
Test methods and limits used were:
a) EN60801-2 (1993) Electrostatic Discharge, 8 kV air discharge.
b) IEC801-3 (1984) RF Field, 3 V/m; see note.
c) IEC801-4 (1988) Fast Transient, 1 kV peak (AC line), 0·5kV peak (signal inputs and
RS232/GPIB ports).
Note: This multimeter operates without malfunction in the specified 3V/m RF field. However,
because the measuring circuits are high impedance and sensitive, spurious readings may be
seen when the interfering RF field is at certain frequencies; the frequencies at which this
may happen depends very much on the length and layout of the connecting leads, etc., in
the measurement set-up. Field strengths as high as 3V/m are typically only found near
deliberate transmitters, e.g. 1 metre from a portable phone; broadcast transmissions typically
have field strengths between a few µV/m and a few mV/m.
Cautions
To ensure continued compliance with the EMC directive the following precautions should be
observed:
a) only use screened cables and connectors to connect between the multimeter's RS232
interface and other equipment.
b) 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.
In the event of part replacement becoming necessary, only use components of an identical type,
see the Parts List.
6
WARNING - risk of electric shock.
CAUTION - refer to accompanying documentation; incorrect operation may damage
the meter.
- mains earth (ground).
- direct current
- alternating current.

EMC