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acting/250 V, standard identification: T1A/250V.
After successfully changing the fuse, snap the cover into the fuse-
holder. The arrow indication must correspond with the present AC
voltage.
Attention!
Only use the measuring instrument when the housing has been safely
closed and screwed together.
3.11 Do not work with the measuring instrument in environments or
under adverse environmental conditions where inflammable
gases, steam or dust are present or can occur.
For safety reasons, it is essential to avoid the measuring instrument
or test leads becoming damp or wet.
3.12 Take particular care when dealing with voltages greater than 25 V
AC or greater than 35 V DC. Even at these voltages a lethal electric
shock can be received when touching electrical conductors. The-
refore, first of all switch off the voltage source current, connect
the measuring instrument to the voltage source points to be mea-
sured, set the required measuring range on the measuring instru-
ment and only then switch on the voltage source again.
After the measurement has been completed, switch off the volta-
ge source and remove the test leads from the voltage source.
3.13 Before each voltage measurement ensure that the measuring
instrument (multimeter) is not set to a current measuring range.
3.14 Before each change in measuring range, the test probes must be
removed from the test points.
3.15 Before each measurement check the measuring instrument and
test leads for damage.
3.16 For measurements, use only the test leads which are enclosed with
the measuring instrument. Others should not be used.
3.17 To avoid electric shock, while measuring take care not to touch the
test probes and the points to be measured (test points), even indi-
rectly.
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3.18 The voltage between any digital multimeter socket and ground
must not exceed 500 VDC or VAC rms. The voltage between any
frequency counter socket and ground must not exceed 35 VDC or
VAC rms.
3.19 Never switch the measuring instrument on immediately after it has
been brought from a cold into a warm area. The resulting con-
densation water could damage the instrument. Allow the instru-
ment to come to room temperature before switching on.
3.20 While working with power supplies, the wearing of metal or other
conducting jewellery such as chains, bracelets, rings, etc. is not
recommended.
3.21 Power supplies are not intended for use with/on people or ani-
mals.
3.22 When connecting the outputs of more than one power supply in
series voltages dangerous to life (> 35 VDC) can result. Take parti-
cular care when dealing with voltages greater than 35 V AC or
greater than 35 V DC. Even at these voltages a lethal electric shock
can be received if electrical conductors are touched.
3.23 Power supply ventilation holes should not be covered! The instru-
ment is to be placed onto a hard, non-inflammable base, so that
cooling air can enter unhindered. The instrument is cooled by
means of a fan on its right side and by means of convection.
3.24 Power supplies and their connected loads should not be left ope-
rating unsupervised. There are measures for the protection and
safety of the connected loads in the face of power supply incidents
(e.g. overvoltages, complete failure) and effects and dangers stem-
ming from the loads themselves (e.g. unduly high current con-
sumption).
3.25 Faulty power supplies can produce voltages over 50 V DC, which
can be dangerous, even when the indicated output voltages of the
instrument are lower than this.
3.26 For power-on work, only tools expressly approved for this should
be used.
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