UniData Communication Systems Starlog Prologger 7001, User Manual

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4 POWER SUPPLY
This chapter describes the uses of internal and external power supplies for the
PROLOGGER. It also describes the low battery shutdown feature. The
PROLOGGER is powered by an internal battery. External power sources can
be used as an alternative supplies or to recharge batteries (NiCad and Sealed
Lead Acid only).
A battery must remain connected at all times to protect data stored in
memory. Provision is made for fitting a Lithium back-up battery to protect
memory storage if the main battery is removed or fails.
4.1 Internal Battery Pack
The PROLOGGER is powered by its own internal power supply in the form
of a battery pack (usually supplied with each logger). Alkaline (Model
6910A) and NiCad (Model 6910B) battery packs are available. The battery
pack is located in the base of the logger housing and connected via a
three-way socket to the logger.
The PROLOGGER requires a single battery voltage of 6.5 to 10 V DC.
Battery life varies anywhere from a few weeks up to 2 years depending on the
logging project (see below).
This section covers:
•
Battery life.
•
Battery connections.
•
Battery replacement.
•
Recharging a NiCad battery pack.
4.1.1 Battery Life
The PROLOGGER battery life is influenced by five factors:
•
logger scan rate.
•
logger program run time.
•
External instrument power requirements.
•
Display usage.
UNIDATA
16 POWER SUPPLY