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EN
digital multimeter BE49
Warning
The device is not a toy and does not belong in the
hands of children.
Warning
Dangers can occur at the device when it is used by
untrained people in an unprofessional or improper way!
Observe the personnel qualifications!
Caution
Keep a sufficient distance from heat sources.
Note
To avoid damages to the device, make sure that the
correct measuring range is selected before carrying out
a measurement.
If you are unsure, select the largest measuring range.
Remove the measuring cables from the measuring
point before changing the measuring range.
Note
To prevent damages to the device, do not expose it to
extreme temperatures, extreme humidity or moisture.
Note
Do not use abrasive cleaners or solvents to clean the
device.
Note
Before commissioning, check the function of the
device at a known voltage source, e.g. on a known and
safe 230 V voltage source or on a known and safe
9 V battery. Select the correct measuring range!
Information about the device
Device description
The multimeter is a battery-powered, mobile hand-held
measuring device with an extensive range of measurement
possibilities.
The device is equipped with the following functional properties
and equipment features:
•
Automatic / manual range selection
•
LCD display
•
Can also be operated while wearing gloves
•
Fold-out stand
•
Safety CAT III (600 V)
•
AC and DC voltage measurement
•
Measurement of direct and alternating currents
•
Resistance measurement
•
Diode testing function
•
Acoustic continuity testing
•
Hold function
Overvoltage protection and measurement category
The power grid is permanently subjected to short-time voltage
peaks, the so-called voltage surge, which can be very low, for
instance when a light switch is actuated, but also very high
when a network operator switches over power lines. The height
of the surge voltage depends on the position within a low-
voltage network in which a device/machine is operated. The
closer this position is to the supply line, the higher is the surge
voltage to be expected. This means that an electricity meter of a
house must be able to absorb a higher surge voltage than a
Wlan router.
For the purpose of simplification, the power grid is divided into
four overvoltage categories. A rated surge voltage is assigned to
overvoltage categories in each case, indicating the voltage
peaks for which a device has to be designed:
Overvoltage
category
Rated surge
voltage
Examples
CAT I
1500 V
Devices with power adapter:
e.g.: laptops, monitors,
telephones
CAT II
2500 V
Devices with cold-device plugs:
e.g.: household appliances,
printers, laboratory equipment,
telephone system
CAT III
4000 V
Devices without a plug:
e.g.: sub-distributions, cables,
sockets, CNC machines,
construction cranes, energy
storage systems
CAT IV
6000 V
Devices at the feed point:
e.g.: electricity meters, primary
overcurrent protection devices,
main switches
In line with the overvoltage categories there are measurement
categories defining the permissible scope of application of
measurement and testing devices for electrical equipment and
systems in low-voltage networks.
The design of a measurement device determines in which
environments and for which voltages it can be safely used. What
is important in this connection for example is the touchability of
live parts, anti-kink protection guards on the measuring lines or
the insulation. Depending on the design details, the
measurement device can carry out safe measurements up to a
specific voltage in one or several overvoltage categories. The
measurement category is specified on the measurement device
as well as in the operating manual.
The measurement category is indicated including the maximum
voltage height, which can either be 300, 600 or 1000 Volt. The
designation CAT III/1000 V for example means that the
measurement device may be used in low-voltage indoor
installation for voltages up to 1000 volts.
