Ammonit METEO-32, Руководство пользователя

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Ammonit Data Logger Manual
52

Ammonit GmbH / 2005 - 2009
When operating with the internal batteries the electronics makes sure that the
one battery is completely discharged before the second one is used. This is
economical, and means that a battery can be replaced without interrupting the
measurements. So that you know which battery has to be replaced, there is a
line reserved in the "System Monitor" to display the supply voltages:
S
S
y
y
s
s
t
t
e
e
m
m
M
M
o
o
n
n
i
i
t
t
o
o
r
r
9
9
.
.
2
2
1
1
2
2
.
.
6
6
V
V
e
e
x
x
5
5
.
.
9
9
This example shows:
•
the Logger is currently operating with the external power supply (12.6 V)
•
the left battery is fully charged (9.2 V) and ready ( )
•
the right battery (5.9V) should be replaced soon.
7.2. Connecting to an external power supply
Any external DC power supply with a maximum of 26V may be connected.
Should there be a regular power socket in the vicinity of the measuring site, a
standard transformer can be used. Preliminary test-runs at the office or in the
lab should as a rule be made with external power so as not to begin the actual
measurements with batteries which are already partly discharged.
For longer measurements it is possible to augment the batteries with a small
solar panel, thereby greatly extending their useful power delivery.
Solar power coupled with accumulators can provide continuous power to the
system. Please take into account that the usefulness of conventional recharging
governor is limited due to the small but continuous power delivery and
fluctuating ambient temperature.
Should the voltage of the external power supply fall below 9 VDC the internal
batteries take over.