3.2.3. Power Supply ZG 0199 for AC Line Operation and Recharging Rechargeable Internal Batteries
AC
Line Operation
The 2512 may be operated
from
100
V to 240 V
(50
to
60
Hz)
AC line supplies using the Power
Supply ZG 0199, which is available as an accessory. It is connected directly to the EXT.
POWER SUPPLY socket on the rear panel
of
the instrument using cable AQ 0035, as shown in
Fig.3.3. There is an internal switch on the EXT. POWER SUPPLY socket which is activated
when the
DIN
plug
of
the cable AQ 0035 is inserted. This connects a diode into the internal
cir-
cuit in order to protect the internal batteries and causes a small voltage
drop
(approximately
0,8
V)
in the internal
supply~
which can be noticed as a slight
drop
in
the reading on the battery
condition meter. When using the internal batteries to power the instrument, the
DIN
plug
should always be removed
from
the socket if
it
not simultaneously being used to recharge the
batteries, in order to conserve battery power. If rechargeable nickel-cadmium cells are
installed, the
ZG
0199 may also be used
to
recharge these in situ, as it is capable
of
supplying
full charging current (330 mA) as well as sufficient current to power the instrument directly. If
alkaline
or
conventional batteries are installed, the OUTPUT SELECTOR switch on the ZG 0199
must be
in
the "Charge - Off" position. Better still, remove such batteries before connecting
the external supply in order to be quite sure that they cannot inadvertently be charged.
Note: Never attempt to recharge non-rechargeable cells.
mn
. •
•
u.vnoH
CHARGE
VOUAGE
MUST
ONLY
aE
N'Pl.fED
WHEN"
USING
AECHIJtGEABlE
fJ,\ffiA:iE$
Fig.
3.3.
Powering the Type 2512
or
recharging its rechargeable internal
batteries from the Power Supply
ZG
. O
199
The ZG 0199 may also be use9 to power another instrument, e.g. Alphanumeric Printer Type
2312 at the same time.
In
this case
it
must be inserted into the battery compartment
of
the
Type 2312, which
it
then powers directly, the 2512 receiving its power
from
the OUTPUT socket
of
the ZG 0199 via the connecting cable AQ 0035.
If the ZG 0199 is used
in
this manner to power two instruments at the same time, care should
be taken to ensure that ground loops are not formed. With the OUTPUT SELECTOR in the
"Drive
Voltage - Off, Charge -
On"
position, and with the use
of
rechargeable Ni-Cd cells, this
problem can be avoided. See the ZG 0199 Instruction Manual for further details.
19
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