Black & Decker 220UH Manuel d'utilisateur télécharger pdf (Page 4)

12V Basic (Resettable Fuse) Kit Instructions

Page 4 of 4

sparks generated as you connect this device. This is perfectly normal, but possibly ‘alarming’ to the

first time user.

3. The battery to be recovered must measure at least 10.5V ‘open circuit’ (or 21V in the case of 24V

batteries). Any less than this and the cause of the battery’s deterioration may well be more than

sulphation and this device is unlikely to function as intended i.e. recover a sulphated battery.

4. Ensure that the electrolyte levels are adequate prior to starting, these should be checked regularly

whilst the device is in use. It may seem obvious but don’t do this with the desulphator connected, they

don’t like water. Desulphators work best on conventional flooded lead acid batteries, they will work on

other types but with varying degrees of success. With maintenance free, SLA, AGM, gel or similar

batteries we strongly recommend that you find some way of accessing the individual cells to ensure

the electrolyte levels are adequate prior to commencing desulphating activities.

5. The desulphator should be used in conjunction with a simple trickle battery charger. The desulphators

themselves consume between 100-170mA depending on model. We would advise caution against

using the desulphator in conjunction with more modern ‘intelligent’ chargers. Such intelligent

chargers or inverters may shunt away some of the desulphators output. In such a case we

recommend placing a ‘choke’ in series with one of the inverters leads to keep the high

frequency spikes from travelling further. This can be a simple toroid with one or two turns of

the inverter leads wound through it or a few ferrite beads applied externally to the leads.

6. The desulphator can be left connected whilst the trickle charger is connected/ disconnected from the

battery. I re-iterate, do not leave the desulphator connected solely to the battery charger.

7. Having said this the device can be used on its own i.e. without a charger until the battery voltage

drops to 10.5V (21V in the case of 24V batteries) i.e. trickle charge the battery in conjunction with the

desulphator until a peak is reached and then disconnect the charger and let the desulphator ‘pull’ the

battery voltage down. Depending on the state of the battery this could be several days. This doesn’t

apply to the 12V LVC versions of these devices. These are designed to be used in conjunction

with some form of battery charging or solar panel system and the LVC function is there to

protect the battery in the event that the battery charging system ‘fails’ as it will cut-out at

12.4V. Be aware that an LVC device will progressively ‘slow down’ as the battery voltage

approaches 12.4V and although the LED will still be illuminated there will be little real activity.

8. If you have a voltmeter the simplest indication of the battery improving will be the maximum voltage

achieved after charging each time. This should rise noticeably during the first week and then increase

more slowly over time. Another indicator is to carry out simple timed load test i.e. how long it takes to

draw the battery down to say 12V. The most reliable method is to use a hydrometer and watch the SG

of the electrolyte rise.

9. I cannot emphasise enough the importance of ensuring the voltage level doesn’t drop below 10.5V

(21V for 24V batteries) at any time. It is almost certain irreversible battery damage will result.

10. Ready built desulphators have been bench tested prior to despatch.

11. The devices are supplied with reverse polarity protection consisting of a PTC resettable fuse and a

diode. In the event you have the misfortune to connect the device the wrong way around the fuse will

‘blow’ and protect the device from harm. Stating the fuse will ‘blow’ is slightly misleading, the nature of

the device is that it achieves a very high resistance very quickly as it ‘heats up’, when it cools back

down again it resets itself and the device used normally.

12. We do not recommend permanently installing these devices in working vehicles. This is

mainly to do with keeping a check on battery electrolyte levels.

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Black & Decker 220UH Manuel d'utilisateur Page 4

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