Power Supply; Rechargeable Battery Operation And Supply Voltage Monitoring; Mains Operation; External Dc Voltage Supply - Ahlborn ALMEMO 710 Operating Instructions Manual

7. POWER SUPPLY

Power can be supplied to the measuring instrument in any of the following
ways :
Integrated lithium-ion battery pack, 4.2 V / 15.6 Ah as standard
Mains adapter / charge adapter, 12 V, 2.5 A
Power supply cable, electrically isolated (10 to 30 VDC, 1 A)
Our product spectrum covers all the appropriate accessories.
7.1 7.1 Rechargeable battery operation and supply volt-
age monitoring
This device is normally powered by a rechargeable lithium-ion battery pack
with 15.6 Ah. At a current consumption of approx. 500 mA the operating time
with full illumination will be approx. 25 hours. If illumination is usually kept
dimmed, the operating time can, depending on the brightness used, be ex-
tended up to 50 hours. To prolong the operating time for the purposes of long-
term recording the device can be left in SLEEP mode. (see 10.3) Operating
voltage and remaining battery capacity can be checked in the ´Power supply´
menu; this gives a basis for estimating the remaining operating time. (see
13.8) As soon as the remaining battery capacity drops to approx. 10%, the bat-
tery symbol
latest - the batteries must be recharged using supplied mains adapter
ZA 1312-NA9 (12 V / 2.5 A); this will save the measuring operation from being
interrupted. (see 7.2) Thanks to the intelligent charge circuitry, the batteries
can in fact be recharged at any time and in any charge status. If the batteries
are completely discharged, the device will switch off but measured data and
the time-of-day will be saved intact. (see 7.6)

7.2 Mains operation

To power the device from an external source or to recharge the batteries,
mains adapter ZB 1312-NA (12 V / 2.5 A) should be connected at socket DC
(3). When the mains adapter is plugged in, the green ´CHARGE´ LED lights
up indicating that the batteries are being recharged. Batteries that have been
switched off will take approx. 3 hours to be recharged; after this the LED goes
out again and the charge circuitry switches to trickle charge. Batteries that re-
main in use will take longer to be recharged because of normal consumption
and the reduced charging current. The mains adapter can in fact be left per-
manently connected to the device in buffer mode without risk of overcharging
the batteries.

7.3 External DC voltage supply

The DC socket (3) can also be used to connect another DC voltage, 12 V. It
can be connected using ALMEMO
will appear in the status bar of the display. Now - at the very
® plug ZA 1312-FS9 (12V, 2.5A). If, how-
ALMEMO
Power supply
ZA 1312-NA9
ZB 2690-UK2
® 710 17