BNC 970 Portable Multi-Channel Analyzer (MCA) - Manual (Page 7)

Model 970 Instruction Manual 4
1.3.3 Using Alkaline Batteries
It is not a problem using non-rechargeable batteries in the Model 970. Remove the four screws
on the Rear Panel and replace the NiMH batteries with AA alkaline batteries. However, you must
be absolutely sure to switch the Battery Type Selection Switch to the Standard position to
bypass the 970’s internal charging circuitry. Failure to do this may result in catastrophic
damage to the Model 970.
Switch back to the Recharge position when NiMH batteries are
reinstalled.
1.3.4 Alternative External Power
If the Model 970 is being operated far from an AC power source for extended periods (i.e., longer
than the internal NiMH batteries can support), then it can also be powered from a number of other
external sources. All that is required is that a DC voltage in the range of 12 to 15 volts is provided
to the unit. If the NiMH batteries will be fast charged by this power supply, then at least 1.25A
must be available. If the NiMH batteries will be trickle charged by this power supply, then at least
750mA must be available. If the battery charging circuitry is bypassed, then at least 600mA must
be available.
DC power from most motor vehicles can meet these specifications, and the 970 can be powered
directly by a motor vehicle cigarette lighter adapter.
The center pin of the External Power Input is positive. Incorrectly applying voltage to the Model
970 will likely damage it.