Velleman DVM891 Bedienungsanleitung Seite 4

• Always discharge the filter capacitors in a power supply circuit before
attaching the test leads.
• Never connect a voltage source to the DVM891 when it is in current (DCA
or ACA) mode, resistance or continuity mode.
• Always turn off the power and disconnect the test leads prior to replacing
the battery or fuse.
• The user should only operate the multi-meter when the back cover is in
place and securely fastened.
• When carrying out measurements on TVs or switching power circuits, you
should always remember that high voltage pulses may occur at the test
points. These pulses may damage the meter.
c. Maintenance
Your DVM891 is an example of superior design and craftsmanship. The
following suggestions will help you keep the device in perfect working order:
• Do not expose the device to water. Wipe it dry immediately if it should get
wet.
• Use and store the multi-meter under normal temperatures. Extreme
temperatures may shorten the life of the device or damage the battery.
• Handle the multi-meter with care. Dropping it may damage the circuit
boards or the housing and may cause the DVM891 to malfunction.
• Replace an old or weak battery with a fresh one of the required size and
type.
• Remove the battery during long periods of inactivity. This will protect the
multi-meter from possible leakage.
• Disconnect the test probes prior to opening the housing.
• A blown fuse should be replaced with an identical one (see §6).
• Do not use this device in case of malfunction or if anomalies are detected.
Have it repaired by qualified personnel.
• Do not use the multi-meter unless the back cover is in place and fully
fastened.
• Use a soft cloth and a mild detergent for cleaning purposes. Never use
abrasives or solvents on the meter.
2. Accessories
• set of test leads
• K-type thermocouple (400°C)
• 1 battery of 9V
• 1 user manual
• 1 holster: it protects the device and ensures comfortable operation. Refer
to the illustrations on page Error! Bookmark not defined. of this manual.
A & B. Use one of the two supports to place the device on a table or a
desk.
01.10.2009
DVM891
4
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