19
Subject to change without notice
Important hints
allowed for drying prior to operation. For safety reasons operation
is only allowed from 3 terminal connectors with a safety ground
connection or via isolation transformers of class 2. The instrument
may be used in any position, however, sufficient ventilation must
be assured as convection cooling is used. For continuous operation
prefer a horizontal or slightly upward position using the feet.
Do not cover either the holes of the case nor the
cooling fins.
Specifications with tolerances are valid after a 30 minute warm-
up period and at 23 degrees C. Specifications without tolerances
are typical values of an average instrument.
Warranty
HAMEG instruments are subject to a strict quality control. All
instruments are burned in for 10 hrs prior to shipment. By
intermittent operation almost all early failures are detected. After
burn-in a thorough test of all functions and of quality is run, all
specifications and operating modes are checked.
However, a component may fail after some time . Consequently,
HAMEG warrants all instruments for 2 years regarding proper
function provided there were no manipulations of the instrument.
Only the original packing is considered adequate for shipping by
train, postal or parcel service. The warranty will be voided if
damage during transport is due to neglect.
In case of any warranty claim please stick a label to
the case of the instrument indicating the cause of
trouble concisely. Add your address, name and phone number
including extension dialling. This will help to accelerate
processing your claim by contacting you for further details.
Maintenance
The instrument does not require any maintenance. Dirt may be
removed by a soft moist cloth, if necessary adding a mild
detergent. (Water and 1 %.) Grease may be removed with
benzine (petrol ether). Displays and windows may only be cleaned
with a moist cloth.
Do not use alcohol, solvents or paste. Under no
circumstances any fluid should be allowed to get
into the instrument. If other cleaning fluids are used
damage to the lacquered or plastic surfaces is
possible.
Mains voltage
HM 7042-4 is available in 2 versions:
For 230 V AC ± 10 % specify part number 23-7042-040A
For 115 V AC ± 10 % specify part number 23-7042-040B
Please check whether the mains voltage used corresponds with
the voltage indicated on the rear panel. Operation using a wrong
voltage is not allowed and may destroy the instrument!
STOP
STOP
STOP
STOP
Power Supply
HM7042-4
HAMEG GmbH · D-63533 Mainhausen
Made in Germany / Fabriqué en RFA
WARNING:
Case removal by authorised personnel only
230 V / 50 - 60 Hz
FUSE IEC 127-III 5 x 20 T2.5A
time lag, träge, temporisé, lento
115 V / 50 - 60 Hz
FUSE IEC 127-III 5 x 20 T5A
time lag, träge, temporisé, lento
Watts (max.): 250 at 230 V / 50 Hz
Instruments
Instruments
Type of fuse:
5 x 20 mm; 250V~, C;
IEC 127, page. III; DIN 41 662
also DIN 41571 page 3.
Line voltage
Correct fuse type
230 V
2 x 2,5 A slow blow
115 V
2 x 5 A slow blow
Changing the line fuse
The fuses are accessible from the outside and contained in the
line voltage connector housing. Before changing a fuse disconnect
the instrument from the line, the line cord must be removed.
Check fuse holder and line cord for any damages. Use a suitable
screw driver of appr. 2 mm to depress the plastic fuse holder
releases on both sides, the housing is marked where the screw
driver should be applied. After its release the fuse holder will
come out by itself pushed forward by springs. The fuses can then
be exchanged, please take care not to bend the contact springs.
Reinsertion of the fuse holder is only possible in one position and
by pressing against the springs until the locks engage.
It is prohibited to repair defective fuses or to bridge them by any
means. Any damage caused this way will void the warranty.
