4
GOSSEN METRAWATT GMBH
Observe the following safety precautions:
•
The instrument may only be operated by persons who
are capable of recognizing contact hazards and taking
the appropriate safety precautions. Contact hazards exist
anywhere, where voltages of greater than 33 V RMS may
occur.
Attention!
!
The calibrator has been designed for safe connection
to signal circuits.
Maximum allowable voltage between connector jacks (7)
amongst themselves and earth is 15 V.
If U
max
or I
max
is exceeded, the integrated 250 V fuse
blows.
•
Be prepared for the occurrence of unexpected voltages
at devices under test (e.g. defective devices). For exam-
ple, 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 functions may be performed with this instrument in
electrical circuits with corona discharge (high-voltage).
•
For this reason,
never confuse
a
calibrator
with a
multimeter
.
•
When necessary, use a multimeter to make sure that no
dangerous contact voltages are present in the signal cir-
cuits to which the instrument is to be connected.
•
In order to prevent damage to the instrument, observe
the
maximum
allowable voltage and current values indi-
cated at the jacks.
With the exception of the resistance simulation and mA
SINK operating modes, the connected signal circuits
should
not feed any voltage or current
back to the cali-
brator.
In order to avoid damage to the instrument when interfer-
ence voltages are applied (within allowable limit values),
the mA SINK and mA SOURCE measuring circuit is
equipped with a fuse F3, which makes this measuring
circuit highly resistive if excessive current should occur in
the event of a fault for the duration of overloading.
Warning!
The instrument may not be operated in explosive at-
mospheres, or connected to intrinsically safe electri-
cal circuits.
Meanings of symbols on the instrument
Warning concerning a source of danger
(Attention: observe documentation!)
Earth
Continuous, doubled or reinforced
insulation
Indicates EC conformity
DKD calibration mark (red seal):
Repair, Parts Replacement and Balancing
When the instrument is opened, voltage conducting parts
may be exposed. The instrument must be disconnected from
the circuit before the performance of repairs, the replacement
of parts or balancing. If balancing, maintenance or repair of a
live open instrument is required, this 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
operated safely, it must be removed from service and
secured against unintentional use.
Safe operation can no longer be relied upon,
•
If the instrument or the test probes are damaged
•
If the instrument no longer functions
•
After long periods of storage under unfavorable
conditions.
!
Consecutive number
Registration number
Date of calibration (year–month)
G
erman
C
alibration
S
ervice -
C
alibration
L
aboratory
B0730
01-08
DKD-K-
19701