Safety Rules - Conrad M-4660A Bedienungsanleitung

It is also possible to connect the DMM with a respective cable (option)
which is connected to the built-in interface to a personal computer. After
installation of the respective software on the PC a communication bet-
ween the multimeter and the PC is possible.

2. Safety Rules

• The digital multimeter M-4660A is CE-tested and meets the EMC gui-
deline: 89/336/EWG.
• This unit is constructed and checked according to DIN 57 411 Part 1/
VDE 0411 Part 1, Safety Requirement for Electronic Measuring Units
and IEC 1010-1. This unit left the factory in a technically safe and per-
fect condition. To maintain this condition and to guarantee safe ope-
ration, the user must observe the safety rules and warnings (Attention)
contained in these operating instructions, by all means.
• This multimeter must only be used in fuse lines which are protected
with 16 A. The voltage existing/appearing must not exceed 250 VDC/
VACrms and the maximum load must not exceed 4000 VA. It is not allo-
wed to use the unit for installations in the overload range III according
to IEC 664. The unit and the measuring cables are not protected
against arcing (IEC 1010-2-031, section 13.101).
• Keep children away from measuring units!
• Observe the accident prevention measures in the workplace prescibed
by the Associations of Employer's Liability Insurance for electrical plant
and operating material.
• When using the unit in schools, training centers and hobby-workshops
the use of the measuring equipment must be responsibly supervised by
teachers or trained personnel.
• If covers are opened or parts are removed, except it is possible without
tools, voltage-carrying components may be accessable. Terminals can
also carry voltage. If it is necessary to open the unit before adjustment,
maintenance, repair or exchange of parts or modules, the measuring
unit has to be disconnected from all voltage sources and measuring cir-
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cuits. If adjustment, repair or maintenance to the measuring unit must
proceed to the unit open, it must only be carried out by qualified ser-
vice personnel or qualified electricians/engineers, familiar with the
dangers and the relevant rules (VDE 0100, VDE-0701, VDE-0683).
• Capacitors in the unit may still carry voltage, even if the unit has been
separated from all power voltage sources and measuring circuits.
• Please ensure to use new fuses of the proper current rating and the
specified type. Do not use repaired fuses and do not bridge the fuse
holders. When replacing the fuse separate the measuring unit from the
measuring circuit, remove any input signal and switch it off. Remove all
connected cables and probe tips ! Use a suitable crosspoint screw driver
and carefully open the case. Remove the faulty fuse(s) and replace it
with a new one of the same type and nominal current 0.8 A quick blow,
250 V; usual name: F 0.8 A/250 V or F 800 mA/250V. For the amperage
range 15 A ultra rapid, 250 V.
After the fuse has been exchanged close the cabinet. Do not operate
the unit before it has been closed and screwed safely.
• Take special care when working with voltage above 25 V (AC) and
above 35 V (DC). Even such voltage might cause a life-dangerous elec-
trical shock when electrical conductors are touched.
First switch off voltage source, connect the measuring unit with the
terminals of the voltage source to be measured, set the measuring unit
to the necessary voltage range and afterwards switch on voltage source.
After measurement has been finished, switch off the voltage source
and remove the measuring cables from the terminals of the voltage
source.
• Make sure before each voltage measurement the unit is not set to the
amperage range.
• Before changing the measuring range remove the probe tips from the
object to be measured.
• Control before each measurement the measuring unit and your test
leads to make sure they are not damaged.
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