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GB | Digital Clamp Multimeter
Before you start using MD-310C clamp multimeter read carefully this
Instruction Manual.
There are highlighted important selected passages which deal with the
occupational safety of this device. This is the way how to avoid electrical
accidents or damage to this device.
The clamp multimeter was designed in compliance with IEC-61010
related to electronic measuring equipment falling into the category
(CAT III 600 V), pollution level 2. The CAT III category is used to measure
circuits powered by a fixed output power supply, such as a relay, socket,
switchboards, power supplies, short branching circuits and lighting
systems in large buildings.
Electrical Symbols
alternating current (AC)
direct current (DC)
warning – read the instruction before use
risk of electric shock
earthing
Certificate of Conformity (CE)
equipment is protected by double insulation and reinforced insu-
lation
WARNING
Pay close attention to the following instructions:
• Before you start using the multimeter check carefully the device for
damage. In case you find evident damage, do not make any meas-
urements! Check the surface for scratches and unglued side joints.
• Check insulation on measuring probes and jaws. When the insu-
lation is damaged the risk of electric shock may occur. Do not use
damaged measuring probes and jaws!
• Do not measure voltage higher than 600 V or current higher
than 600 A!
• Clamp “COM“ must be connected to the reference measuring earth.
• If you find out abnormal measurement results, do not use the mul-
timeter. In case you are not sure about the cause of fault, contact
the service centre.
• Do not measure higher voltage and current values than those which
are marked on the front panel of the multimeter and jaws. There is
a risk of electric shock and damage to the multimeter!
• Before the use verify the right function of the multimeter. Test the
circuit of which you know the electric parameters.
• Before you connect the multimeter to the circuit for which you want
to measure current, switch off supply of the given circuit.
• Do not use and store the multimeter in the space with high tem-
perature, dustiness and humidity. We also do not recommend using
the device where strong magnetic field occurs or where the risk of
explosion or fire occurs.
• When replacing the battery or other parts of the multimeter, use
spare parts of the same type and specification. Replace the parts
only when the multimeter is off and disconnected!
• Do not change or modify the inner circuits of the multimenter
in any way!
• Pay close attention to measurement of voltage higher than
30 V AC rms, peak 42 V or 60 V DC. There is a risk of electrical injury!
• When handling the measuring tips, make sure you hold them
behind the finger barrier.
• To avoid electrical injury do not touch any bare conductors with
your hand or skin.
• Before you open the multimeter cover, disconnect the measuring
tips from the tested circuit.
• Do not make measurements when the multimeter cover is re-
moved or loose.
• As soon as the flat battery icon appears “
“, replace the battery.
Otherwise the performed measurements can be inaccurate.
WARNING
Use the multimeter MD-310C only in the way specified below, otherwise
damage to the device or your health can occur. Pay attention to the
following instructions:
• Before you measure resistance, diodes or current, disconnect
the circuits from the power supply and discharge high-voltage
condensers.
• Before measuring, make sure that a circular switch of the measure-
ment range is in the right position. Do not make any changes in
the measurement range during the measuring process (indexing
the circular switch of measuring programmes) in any case! It could
result in damage to the device.
• If you measure current, switch off the circuit supply before con-
necting the multimeter.
Device Description
The clamp multimeter MD-310C is of the range of compact devices
with a 3.5 digital display designated for the measurement of direct and
alternating voltage, alternating current, resistance, diode testing and
sound tests of conductivity and circuits.
The multimetr is equipped with an automatic range for measuring
values. It indicates exceeding the measured range. It has an automatic
break function. The multimeter provides an overload protection and
informs on the battery low conditions.
The multimeter MD-310C is suitable for using e.g. in workshops, labo-
ratories and households.
Technical Parameters
Display: LCD, 1999 (digitals 3.5) with automatic polarity indication
Method of measurement: double downwards integration by
A/D converter
Reading rate: 3× per second
Span of jaws: 25 mm
Max. measured conductor: Ø 25 mm
Working temperature: 0 °C to 40 °C < 75 %
Storing temperature: -20 °C to 50 °C, relative humidity < 85 %
Supply: 2× 3 V CR2032
Low battery: indication by symbols on the display
Indication of exceeding the range: number imaging „OL“ to LCD
Category of measurement: CAT III (600 V)
Dimensions and weight: 190 × 76 × 36 mm; 160 g (including batteries)
ACCESSORIES
Manual: 1 pc
Testing conductors: 1 pair
Battery: 2 pcs CR2032, 3 V
Front view of the multimeter
(see Fig. 1)
1 – Clamps (Current sensor)
They are used for enclosing a conductor when measuring the current.
2 – FUNC./HOLD button (holding data on the display)
It is used for entering the mode for holding measuring data or fin-
ishing this mode (it applies to measurement of voltage, current and
resistance). It is used for switching between a diode test or continuity
test when a rotary switch is in position.
3 – Display
3.5 digital LCD display with max. measurement data 1999.
