Usage Of The Multimeter - Conrad Electronic VC - 200 Green DMM Anleitung

4. Usage of the Multimeter

4.1 Charging of the Measuring Unit or charging of the High-Cap, a
High Capacitive Capacitor
To ensure a faultless functioning of the measuring unit, it must be
charged from time to time. If the battery symbol appears in the display
the voltage in the High-Cap dropped to a value of approx. 2.5 VDC.
To recharge at the 230 V mains socket proceed as follows:
Set rotary function switch (2) to position "CHARGE 230VAC MAX"
(yellow letters). Connect the measuring cables with the measuring
unit: the black measuring cable with the COM-socket the red measuring
cable with the V-Ohm-socket. Now connect the measuring tips of the
measuring cables with a 230 V mains-socket, observe the safety
rules. Depending how long the connection with the mains socket is
maintained you have more or less "energy" for the various measuring
tasks.
The following "charging times" result in the following operation times:
"Charging" for 1 minute is enough for an operating time of approx.
1 hour and 15 minutes until the battery symbol appears = recharging
" " , at a voltage of approx. 2.5 V.
- +
"Charging" for 2 minutes is enough for an operating time of approx.
2 hours, until it must be recharged
"Charging" of 3 minutes is enough for an operating time of 2 hours
and 15 minutes, until it must be recharged
The operating times refer to continuous operation, i.e. the measuring
unit is continuously switched on.
If the measuring unit is switched off after each measurement, the
available operating time is extended. This is also valid for sunny days.
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The current from the solar cell is relatively low but is not sufficient to
load the High Cap. But there is enough current to buffer the High Cap
when the measuring unit has been switched off.
To recharge with low current in the range of 9 to 20 V (typ. 12 V) DC-
or AC voltage e.g. at a 12 V car battery (DC) or a transformer with 9
to 20 V (typ. 12 V) output voltage (AC) proceed as follows:
Set the rotary function switch (2) to position "CHARGE 9-12 V AC DC"
(blue letters).
Connect the test leads with the measuring unit: the black lead with the
COM-socket, the red lead with the V-Ohm-socket. Now connect the
test lead tips with a 12 V DC (=battery) or e.g. 12 V AC "voltage source"
(secondary side of a safety transformer), observe all safety rules.
Depending on how long this connection is existing, you have more or
less "energy" for the various measuring tasks.
The following "charging times" correspond to the the following
operating times:
Charging for 1 minute is sufficient for a operating time of approx.
1 hour and 30 minutes until the battery symbol for necessary charging
= re-charging appers " - + ", at approx. 2.5 V.
Charging for 2 minutes is enough for a operation time (measuring
time) of approx. 2 hours, until recharge.
Charging for 3 minutes is enough for a operation time of approx. 2
hours and 15 minutes, until recharge.
The above named operation times refer to the respective permanent
service i. e. the measuring unit is coninuously switched on. If the
measuring unit is switched off after (each) measurement, the available
operating time is extended. In this mode the built-in solar cell can
extend the operating time if sufficient sunlight is available.
Attention!
Never operate the unit with open cabinet. Life danger!
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