Chapter II
5000-count portable digital multimeter, with current input
15
1.
GENERAL INSTRUCTIONS
You have just acquired a portable digital multimeter and we thank you for your confidence.
This instrument complies with the specification of IEC 61010-1 + A1 + A2, 1995, con-
cerning safety requirements for electronic measuring apparatus. To get the best service
from this instrument, read carefully this user's manual and respect the detailed safety
precautions.
The contents of this manual must not be reproduced in any form whatsoever without our
consent.
1.1.
Precautions and safety measures
1.1.1. Preliminary
- This device can be used for measurements on category
ΙΙΙ
installations, for voltages
never exceeding 600 V (AC or DC) relative to the earth.
- Definition of overvoltage categories (cf. publication IEC 664-1) :
CAT
I
: The circuits of CAT
I
are protected by measures limiting transient
overvoltages to appropriate low level.
Example : protected electronic circuits
CAT
II
: The circuits of CAT
II
are power supply circuits of appliances or portable
equipment with transient overvoltages of an average level.
Example : appliances and portable equipment
CAT
III
: The circuits of CAT
III
are power supply circuits of power equipment with
important transient overvoltages.
Example : fixed installation or industrial equipment
CAT
IV
: The circuits of CAT
IV
may comprise very important transient
overvoltages.
Example : primary supply level
∗
When using this multimeter, the user must observe all normal safety rules
concerning:
- protection against the dangers of electric current.
- protection of the multimeter against misuse.
∗
For your own safety, only use the measuring probes which have been delivered with
the instrument : they conform to the IEC 61010-1 + A1 + A2, 1995 safety standard.
Before use, check that they are in good working condition.
1.1.2. During use
∗
Test equipment risk assessment
:
Users of this equipment and or their employers
are reminded that Health and Safety Legislation require them to carry out a valid
risk assessment of all electrical work so as to identify potential sources of electrical
danger and risk of electrical injury such as from inadvertent short circuits. Where
the assessment show that the risk is significant then the use of fused test leads
constructed in accordance with the HSE guidance note GS38 "Electrical Test
Equipment for use by Electricians" should be used.
∗
Never exceed the protection limit values indicated in the specifications for each type
of measurement.
