2
3. VOLTAGE SELECTION AND CHARGING RATE
WARNING! All selections & connections must be made before the battery charger is switched on.
MP716
Set the 12V/24V switch to match the voltage of the battery.
If you are charging a small battery or you only require a slower rate of charge, set the switch on the front panel
to “
MIN
”. If you are charging a large or leisure type battery or require a quick boost charge, set the switch to
“
BOOST
”. Selecting “1” or “2” makes no difference when in BOOST mode.
MP730 and MP750
To select the output voltage appropriate for your battery (12V or 24V), unscrew the black hand-wheel of the
corresponding output terminal on the front panel of the battery charger (these are labelled “
+24V
” and “
+12V
”)
and connect the ring terminal of the positive charging lead (RED) to the terminal post and replace the knob
securely.
WARNING!
DO NOT touch the exposed post when the battery charger is switched on.
If you are charging a small battery or you do not require a quick boost charge, set the switch on the front panel
to “
MIN
”. You can then choose between a slow or faster rate of charge by selecting “
1
” or “
2
” on the
neighbouring switch. If you are charging a large or leisure type battery or require a quick boost charge, set the
switch to “
BOOST
”. Selecting “1” or “2” makes no difference when in BOOST mode.
4. CHARGING
Consider the position of the charger carefully; ensure it is used away from combustible materials.
Insert the battery charger mains plug into the mains supply (230 Volts AC only) and switch the outlet on.
WARNING! DO NOT ATTEMPT TO START THE VEHICLE WITH THE CHARGER CONNECTED. THIS
MAY BLOW THE OUTPUT FUSE OR DAMAGE YOUR BATTERY CHARGER.
Your Battery Charger should now be working and the rate of charge will be shown on the ammeter fitted on the
front of the charger. When a flat battery is initially connected to the Battery Charger the charging rate should
build up quickly. As the battery becomes more charged the rate of charge will drop, this is normal. The
charging current will never fall to zero as the charger will continue to give a small output even when the battery
is fully charged. When charging current has dropped to a low, constant level the battery is fully charged.
A charging time of
no more than 10 hours
is recommended,
at no more than 10% of the battery’s ampere hour
capacity
. i.e. 60 Ah battery should be charged at no more than 6Amps for no more than 10 hours. The battery
charger is fitted with an internal, automatic thermal protection device, if the charger overheats due to overload,
environment or for any other reason, charging will be interrupted, charging will restart automatically when the
charger has cooled down. Note: With a fully charged or faulty battery connected to the charger, virtually no
charge may register on the ammeter.
ELECTROLYTE
Regularly check the specific gravity of the liquid, using a hydrometer, until a reading of “Fully Charged” or
1,250 is reached.
5. WHEN CHARGING IS COMPLETE
Switch off the mains supply, unplug the charger and remove the charging clips, negative (-ve / black) first.
Inspect the liquid levels in each cell and top up if applicable / necessary, using the correct fluid. Now push
home or tighten the caps. Any surplus fluid around the cell tops should be wiped off (this should be done with
extreme care as it is acidic). If the battery has been removed for charging, replace it and re-connect the
cables.