abem Terrameter SAS 4000 Instruction Manual
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ABEM Terrameter SAS 1000 / SAS 4000- 24 -4 POWER SUPPLYThe SAS 4000 is powered by either by a clip-on NiMH (NiCd for older units) battery pack orby an external 12V source. The SAS 1000 / 4000 consumes around 1000 mA whenever it isturned on. During current transmission, the consumption can be up to 20 A. For all practicalpurposes this implies that the SAS 1000 / 4000 can run up to one working day on the originalpower pack, provided the instrument is used for ordinary electrical soundings only and turnedoff between soundings, and provided no higher currents than 20 mA are used. In the case ofautomatic profiling using the LUND imaging system, involving thousands of readings perday, it is necessary to use an external (car) battery. The External Battery Connector, EBC,replaces the NiMH Power Pack, and allows the instrument to be connected directly to anexternal 12 V source. The Terrameter SAS 1000 is delivered with this adapter only, and noNiMH power pack.The external battery should be of sufficient capacity. Lead acid batteries of type car batteries,or better gelled/sealed lead-acid batteries that do not leak if turned over, of 25 Ah or highercan be used. For heavy duty use 60 Ah is recommended.The battery pack, as well as the External Battery Adapter, clips conveniently onto the bottomof the instrument.4.1 BATTERY PACKStored batteries lose their charge (self-discharge) gradually, and this takes place more rapidlyat higher ambient temperatures. However, even if a battery loses all of its charge duringstorage, satisfactory operation can be restored after one or two charge/discharge cycles.During storage, batteries should be disconnected from instruments. Batteries can be stored atambient temperatures ranging from -40 C to +65 C.The NiMH battery pack has a capacity of 8 Ah.Safety precautions• DO NOT damage a battery pack or expose it to fire. It may burst or release toxic materials.• DO NOT short circuit the battery since this will result in high discharge currents, causingdangerous heating.Older battery packs with Ni-Cd battery cellsSince the batteries are sealed you will normally not come into contact with the electrolyte.You should nonetheless be aware that the electrolyte used in both sealed and vented Ni-Cdbatteries is potassium hydroxide. If you should get it in your eye, even a small amount cancause serious injury. Immediate flushing with water for 15 minutes plus follow-up medicalattention is absolutely necessary. If the electrolyte gets on your skin, use vinegar or someother mild acid for neutralization.Finally, it should be remembered that the cadmium in a Ni-Cd battery is a toxic metallicelement that should not be disposed of in the usual way, since it represents a serious threat tothe environment. Follow the rules set up by the local authorities in your country for handlingrechargeable batteries. |
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