Operating On The Battery; Recharging The Battery - Promax MC-577 Manual De Instrucciones

THE EQUIPMENT IS FACTORY SET FOR 220 V OPERATING VOLTAGE.
BEFORE SWITCHING ON THIS INSTRUMENT, SET THE VOLTAGE SELECTOR TO
THE PROPER POSITION AND BE SURE THAT THE FUSE VALUE IS ACCORDING
TO THE MAINS VOLTAGE.
AVOIDING THESE DIRECTIONS COULD DAMAGE THE EQUIPMENT.

3.2 Operating on the battery

The MC-577 is a portable device powered by a 12 volt internal battery. Before
taking any measurements, the battery charge must be checked. If the battery is low (a
voltage lower than 11.2 V) colon sign (:) will appear blinking on the display of the
frequency counter, under this circumstance the equipment must be connected to the
mains to carry out the battery charge.
For the device to operate on the battery, disconnect the power cord and press the
start switch I/O [3].
If the battery is very low, the cut-off circuit will prevent the device from functioning. In
such a situation the battery must be recharged immediately.

3.2.1 Recharging the battery

The MC-577 has an incorporated battery-charger, which can be directly connected
as much to the mainsas to the 12 V connector [22], for the battery charging process.
Battery charging can take place during the normal working day. The instrument may still
be used while the battery is being charged, under these conditions the battery will
charge to up to 90% of its capacity. If the battery is charged by means of the using the
car lighter charger, the instrument will not be able to be started up.
To recharge the battery, connect the instrument to the mains supply or to the 12 V
connector [22] using a external power supply without pressing the power switch I/O
[3]. The amount of time it takes to recharge depends on the battery condition. If it is very
low (the low battery message appears) recharging period is about 7-8 hours. The LINE
[17] or 12 V [18] doit rester allumé.
The battery charge must always exceed the minimum cut-off charge.
To ensure the best results, the lead battery in this device must always be fully
charged. If the equipment has been in storage or used only occasionally for a
long period of time, it is ABSOLUTELY NECESSARY to check the full-charge
functions periodically (every six months, for example), and to compensate for the
self-discharging effect of the battery. The rate at which a fully charged battery
self-discharges depends on the temperature. For example, at an ambient
temperature of 20 ° C, the battery suffers a 50% loss after 16 months and at 40 ° C
it loses the same charge in only 5 months (these are reference data). If the battery
remains very low for a period of 4 weeks or more, it will not accept recharging
since the plates are sulphated and must be replaced.
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USER'S MANUAL MC-577.
CAUTION
IMPORTANT
05/2003