GMC-I Messtechnik GmbH
5
2
Safety Features and Precautions
You have selected an instrument which provides you with high
levels of safety.
This instrument fulfills all requirements of applicable EU directives
and national regulations. We confirm this with the CE mark. The
relevant declaration of conformity can be obtained from
GMC-I Messtechnik GmbH.
The TRMS digital multimeter has been manufactured and tested
in accordance with the following safety regulations:
IEC 61010–1:2010 / DIN EN 61010–1:2011 (VDE 0411–1:2011)
and IEC 61010-2-033:2012 / DIN EN 61010-2-033 (VDE 0411-
2-033)
When used for its intended purpose (see page 6), safety of the
operator, as well as that of the instrument, is assured. Their safety
is however not guaranteed, if the instrument is used improperly or
handled carelessly.
In order to maintain flawless technical safety conditions, and to assure
safe use, it’s imperative that you read the operating instructions thor-
oughly and carefully before placing your instrument into service, and that
you follow all instructions contained therein. Make sure that the operat-
ing instructions are available to all users of the instrument.
Tests may only be executed by a qualified electrician.
The multimeter is equipped with an automatic socket blocking
mechanism for your safety, and in order to safeguard your instru-
ment. This mechanism is linked to the rotary switch and only
allows access to those jacks which are actually required for the
selected function. It also prevents the user from turning the rotary
switch to impermissible functions after the measurement cables
have already been plugged in.
Measuring Categories and their Significance per IEC 61010-1
The measuring category and the maximum rated voltage which
are printed on the device apply to your measuring instrument, e.g.
1000 V CAT III.
Refer to chapter 10.2 regarding use of the measurement cables.
Observe the following safety precautions:
•
The multimeter may not be used in
potentially explosive atmo-
spheres
.
•
The multimeter may only be operated by persons who are
capable of recognizing
touch hazards
and taking the appropri-
ate safety precautions. Touch hazards in accordance with the
standard exist anywhere, where voltages of greater than 33 V
(RMS) or 70 V DC may occur. Avoid working alone when tak-
ing measurements which involve touch hazards. Be certain
that a second person is present.
•
Maximum allowable voltage
between the voltage measuring sockets or all connector
sockets and ground is 1000 V for measuring category III and
600 V for measuring category IV.
•
Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.
•
Make certain that the measurement cables are in flawless
condition, e.g. no damage to insulation, no interruptions in
cables or plugs etc.
•
No measurements may be made with this instrument in elec-
trical circuits with corona discharge (high-voltage).
•
Special care is required when measurements are made in HF
electrical circuits. Dangerous pulsating voltages may be pres-
ent.
•
Measurements under moist ambient conditions are not per-
mitted.
•
Be absolutely certain that the measuring ranges are not over-
loaded beyond their allowable capacities. Limit values are
included in chapter 8, “Characteristic Values”, in the table enti-
tled “Measuring Functions and Measuring Ranges” in the
“Overload Capacity” column.
•
The multimeter may only be operated with installed rechargeable
batteries or mains module. Dangerous currents and voltages are oth-
erwise not indicated, and the instrument may be damaged.
•
Weak (insufficiently charged) rechargeable battery
If the “weak battery” icon appears in the battery level indicator,
it’s no longer permissible to perform safety-relevant measure-
ments. Furthermore, compliance with the listed specifications
is no longer assured in the case of a weak rechargeable bat-
tery.
•
The instrument may not be operated if the fuse cover, the
rechargeable battery pack or the mains module has been
removed, or if its housing is open.
•
The input for the current measuring range is equipped with a
fuse link.
Maximum permissible voltage for the measuring circuit (=
rated voltage of the fuse) is 1000 V AC/DC.
Use specified fuses only (see page 49)! The fuse must have a
breaking capacity of at least 30 kA
.
Opening the Instrument / Repairs
The instrument may only be opened by authorized, trained per-
sonnel in order to ensure flawless operation and to assure that the
guarantee is not rendered null and void.
Even original replacement parts may only be installed by autho-
rized, trained personnel.
If it can be ascertained that the instrument has been opened by
unauthorized personnel, no guarantee claims can be honored by
the manufacturer with regard to personal safety, measuring accu-
racy, compliance with applicable safety measures or any conse-
quential damages.
If a guarantee seal is included and it has been damaged or
removed, all guarantee claims are rendered null and void.
Repair and Replacement of Parts by Authorized, Trained Personnel
When the instrument is opened, voltage conducting parts may be
exposed. The instrument must be disconnected from the measur-
ing circuit before performing repairs or replacing parts. If repair of
a live, open instrument is required, it may only be carried out by
trained personnel who are familiar with the dangers involved.
Defects and Extraordinary Strains
If it may be assumed that the instrument can no longer be oper-
ated safely, it must be removed from service and secured against
unintentional use.
Safe operation can no longer be relied upon:
•
If the device demonstrates visible damage
•
If the instrument no longer functions, or if malfunctioning
occurs
•
After long periods of storage under unfavorable conditions
(e.g. humidity, dust or extreme temperature (see “Ambient
Conditions” on page 49)
CAT
Definition
0
Measurements in electrical circuits
which are not directly connected to the mains:
e.g. electrical systems in motor vehicles and aircraft, batteries etc.
II
Measurements in electrical circuits
which are electrically connected to the low-voltage mains:
via plug, e.g. in household, office and laboratory applications
III
Measurements in building installations:
stationary consumers, distributor terminals, devices connected permanently to
the distributor
IV
Measurements at power sources for low-voltage installations:
meters, mains terminals, primary overvoltage protection devices
