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5.1.1 Multimeter Test Leads
The test leads supplied meet the requirements of IEC1010-031 and are rated to 1000V Cat
III. Use only the test leads provided, or a set of similar performance, to ensure safe
operation. Alternative test leads should be rated to at least 1000V, 600V (Cat II) and 10A
current capability.
5.2 Rear Panel Connections
5.2.1 Trigger In/Out
Screw-less connectors are provided on the rear panel for the connection of an external trigger
signal, and a trigger out signal. See section 9
for full details.
5.2.2 Digital Interfaces
Depending upon model, rear panel connectors are provided for USB only (1908) or USB,
RS232, LAN and GPIB (1908P). Refer to Remote Operation, section 14
, for full details.
5.2.3 AC Inlet
The instrument can be connected to AC mains using the power lead supplied or a suitable
alternative, see Installation section 3.2.
When the power lead is connected this lead provides the
necessary protective earth connection to an external protective earth system.
5.2.4 Protective Earth Terminal
For battery only operation, without an AC power lead connected, the M4 threaded chassis
connection marked must be connected to an external protective earth system via a
green/yellow insulated cable, with a cross-section of at least 0.75mm
2
, fitted with a M4 terminal.
Without this connection, ‘leakage’ current from any accessible part may exceed 0.5mArms, the
Normal (safe) limit specified by EN61010-1, under some extreme measurement conditions, e.g. high
voltage, high frequency, AC volts measurement.
. WARNING! THIS INSTRUMENT MUST BE EARTHED.
TTL/CMOS
External Trigger
Warning! This instrument must be
earthed. Connect terminal to an external
protective earth system when instrument
is used without an AC mains connection.
Kensington
Lock
USBRS232 LAN
Power
switch
AC power
connection
Protective
Conductor
Terminal
1
P
GPIB
(1908P
only)
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