B.1.21 How Long Is The Battery Life - ASD FieldSpec 3 User Manual

www.asdi.com Appendix B Reference Information
A few broken fibers is not critical when measuring reflectance, because this is
a ratio. Any noise introduced by the broken fibers in measuring the sample
were also present when measuring the white reference, and therefore cancels
out.
Radiance and irradiance are measured using the raw data and comparing to
numbers that exist in the calibration file. Therefore, a few broken fibers will
result in lower values.
The fibers are protected by a metal spiral inside the black cable casing. If
there are kinks in your cable, the fibers are not necessarily damaged.
However, if your cable has been crunched so severely that you are able to see
the protective metal spiral, the chances are high that the fibers have been
damaged too. Refer to the fiberoptic Check utility to determine if any fibers
are broken.
The fibers can be damaged by coiling the cable up too tightly. If left in a tight
coil for longer than a week, the fibers are likely to develop longitudinal
fractures that will not be detectable. These fractures in the fiber will cause
light leakage, resulting in a weaker signal. The fiberoptic cables should be
stored by placing them loosely within the netting compartment on the
instrument.
WARNING! The fiber cable should never be stored with a bend of less
than a 5" diameter for long periods of time.

B.1.21 How long is the battery life?

The charge of the NiMH (Nickel-Metal Hydride) battery lasts about nine (9)
hours using a VNIR-only spectroradiometer with accessory not powered by
the instrument in an ambient environment. The charge of the NiMH battery
lasts over four (4) hours using a full-range spectroradiometer with a Contact
Probe in an ambient environment.
The Gel Cell rechargeable battery lasts about nine (9) hours using a
VNIR-only spectroradiometer with accessory not powered by the instrument
in an ambient environment. The charge of the Gel Cell battery lasts over four
(4) hours using a full-range spectroradiometer with a Contact Probe in an
ambient environment.
The Gel Cell rechargeable batteries are rated to give 200 to 300 uses when
they are fully drained (discharged to 9 volts) each use. Letting the battery
discharge under 9 Volts will shorten the battery's life. If the battery is only
used for 50% rated capacity up to 500 uses are possible. In the same way
using only 30% capacity can result in up to 1,000 uses.
Note: The limiting factor for how long you can work in the field may be the battery
in the instrument controller rather than the spectroradiometer's batteries.
ASD Document 600540 Rev. J 88 FieldSpec® 3 User Manual