Introduction; Safety Rules - Conrad VC-227 Bedienungsanleitung

1. Introduction

This multimeter is equipped with several special functions and
features which are indispensable for some measurements:
With the "R"-function (R=MIN/MAX recording = recording of minimal/
maximal value) the highest (MAX) and the lowest measuring value
(MIN) can be stored (automatically). This function can be used e. g.
during battery charge.
With the function "HOLD" varying measuring values can be held
"frozen" to insert them afterwards e.g. in a measuring record for
further evaluation. With the key Range you can "leave" the autorange
function, i.e. you can set the measuring range manually (move the
decimal point).
The 4 1/2 digit LC-Display allows a resolution up to four decimal
points. The auto-power-cut-off function helps to save the battery life,
that means the multimeter will switch off after 30 min. "disuse" in the
standby mode.
The VC-227 can be used for hobby, industry (with restrictions) and
school. etc.

2. Safety Rules

• This unit is constructed and checked according to DIN 57 411
Part 1/VDE 0411 Part 1, protective measures for electrical
measuring units. This unit left the factory in safe and perfect
condition. To maintain this condition and to guarantee a safe
operation the user has to pay attention by all means to the
safety rules and warnings which are contained in this manual.
• This multimeter may only be used in fuse lines which are protected
with maximal 10 A and which have a maximal load of 4000 VA. It
is not allowed to use the unit for installations in the overload range
III according to IEC 664.
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The unit and the measuring cables are not protected against
arcing and it is not intended for high energy industrial use. (IEC
1010-2-031, section 13.101.). Don't exceed the input limits.
• Keep children away from measuring units!
• Pay attention to the rules for prevention of accidents in industrial
enterprises prescibed by the Industrial Trade Associations for
electrical installations and production facilities.
• If covers are opened or parts are removed, exept it is possible
without tools, voltage-carrying components can lay open.
Terminals can also carry voltage. If it is necessary to open the unit
before adjustment, maintenance, repairing or exchange of parts
or modules, the measuring unit has to be separated from all
voltage sources and measuring circuits. Repairs or maintenance
to the measuring unit must only be carried out by qualified service
personell or qualified electricians who know the dangers and the
respective rules (VDE 0100, 0701, VDE-0683).
• Capacitors in the unit can still carry voltage, even if the unit has
been separated from all voltage sources.
• Before you operate the measuring unit again, make shure the
cabinet has been closed and screwed safely.
• Use caution when working with voltage above 25 V AC and above
35 V DC.
Such voltage might already cause a life-dangerous electrical
shock when electrical conductors are touched.
First switch off the voltage source, connect the measuring unit
with the terminals of the voltage source to be measured, set the
measuring unit to the necessary voltage range and switch on
afterwards the voltage source.
After measurement has been finished, switch off the voltage
source and remove the measuring cables from the terminals of
the voltage source.
• Disconnect the test probes from the test points before changing
the measuring range.
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