CAUTION: If using alkaline batteries, do not plug the charger into the unit. These batteries
can overheat or crack if an extrnal voltage is applied and can melt the battery compartment.
The unit is fuse protected to prevent this. If the unit will not operate under battery power
alone but does operate with the charger plugged in , the fuse is probably blown.
BATTERY REPLACEMENT & CHARGER
Remove the battery cover by pressing and sliding in the direction of the arrow. The battery
clips are designed to hold the batteries fast, and a blunt tool is required to remove the first
battery. The batteries used are 4 X AA Ni-Cd rechargeables, 1.2 V 700 mAh. Observe
polarity markings when installing new batteries.These batteries are designed to be slow
charged over a period of 12-14 hours, with the charger provided. The charger output is 5.8-7.5
Vdc at 70 ma. Do not use a charger with a higher output, because higher currents can ruin the
batteries. Also, the jack and plug are of a specific type and size. Ni-Cd batteries designed to
accept a quicker charge can also be used, as long as they are AA size, 1.2-1.4 volt, and are of
the nickel cadmium type. Do not use other rechargeable types such as lithium. AA alkaline
(non-rechargeable) batteries can be used in some situations, but extreme caution must be
exercised because plugging the unit into the charger with alkaline batteries installed can cause
overheating or even melting of the battery compartment.
The electronics and battery compartment are fuse protected. This fuse is a thermal polyfuse,
which heats up and causes the main power circuit to open when excessive current is present.
The fuse is located under the circuit board and is not user accessible. If the unit operates with
the charger plugged in but not on battery power alone, this fuse is probably tripped. The fuse
will reset itself after a period of about 5 minutes if the source of the problem is corrected. The
fuse will trip if alkaline batteries are used with the charger plugged in, if the batteries are
inserted incorrectly, or if a short circuit is present in the wiring.
Coffee Laboratory 589 Rappahannock Drive White Stone Va 22578 TEL (804) 435-5522
www.coffeelabequipment.com
