Spent batteries are special waste and must be disposed of in an environmentally accep-
table way. Take spent batteries back to your dealer or dispose of them in your local bat-
tery collection container !
Rechargeable battery operation:
Instead of the standard batteries you can use rechargeable battery packs.
Rechargeable batteries are of lower capacity, 110 mAh, and provide an opera-
ting time of only 25 hours. If sensors or modules also requiring power are con-
nected, the operating time will be accordingly shorter. From our range of ac-
cessories we recommend the 9-volt rechargeable battery with a charger inte-
grated in the connector, ZB 2000 LS.
Tips on the correct handling of rechargeable batteries:
The rechargeable batteries supplied are not usually charged when delivered.
If NiCd cells are only partly discharged, normal recharging will not restore them
to full capacity.
For this reason use the device until the batteries are nearly totally discharged
and then recharge them completely.
This will significantly prolong the life of your rechargeable batteries.
Even fully charged batteries discharge in storage without being used.
3.2 External voltage supply
On the right side of the device there is a socket (4) for connecting an external
power supply. In our range of accessories we offer a mains adapter ZB
2290-NA (12 V / 200 mA). Or, alternatively, you can use some other DC po-
wer source (7 to 13 V). The power source is connected by means of a low-vol-
tage connector (NES1 as per DIN 42323), center pin to minus.
If, however, the power supply has to be electrically isolated from the transdu-
cers or if a larger input voltage range (10 to 36 V DC) is required, electrically
isolated supply cable ZB 2290-UK must be used. It will then be possible to
operate the measuring instrument using a 12- or 24-volt on-board supply sy-
stem.
If a battery is connected, this will, in the event of a voltage drop
below 9 volts, take over as power supply.
3.3 Switching ON and OFF
The slide switch (1) on the left side of the device has two switch positions :
up :
ON
i.e. to switch ON
down :
OFF
i.e. to switch OFF
Certain device parameters, e.g. print cycle (00:00), analog reference channel
(measuring channel), temperature compensation (25 °C), air pressure (1013
mbar), and hysteresis (10 digits) can be permanently programmed via the in-
terface. To reset these parameters to their default values (shown in brackets),
keep the
CLEAR
key pressed down when switching ON.
ALMEMO
2390-3
11
Power supply