Measurement Computing TempBook rev.4.0 - Manual (Page 23)

TempBook User’s Manual 04-25-01 Installation, Configuration, and Calibration 2-5
Charging the Battery Modules
The DBK30A package includes a charger for the intended line voltage (either 120 VAC or 230 VAC). To
charge the battery module, plug the output cable from the charger into the POWER IN connector on the
DBK30A, and plug the charger into an appropriate source of AC power (see figure). The charge cycle will
be initiated automatically, and the batteries will be fully charged after the charging cycle terminates.
Connecting the Charger
To initiate another charge cycle, depress the START CHARGE momentary rocker-arm switch. Subsequent
charge cycles applied to a fully charged DBK30A will have no ill effect because the DBK30A will sense
the fully-charged status of the batteries and revert to the trickle-charge state within a few minutes.
Three LED status indicators on the DBK30A provide information on the charge process or external load as
noted in the table.
Power In Illuminated when the charger is connected to a source of AC power and to the battery
module.
Battery Charging Illuminated steadily while battery is in the high current (2-amp) charge mode.
Flashing briefly, one or two flashes at a time, when the internal batteries are fully charged.
Power Out Illuminated steadily when an external TempBook product is connected and drawing current
from the battery modules.
Battery Module Connection
The DBK30A package includes a short connecting cable (CA-115) to connect to the TempBook. This
cable connects the Power Out connector on the DBK30A to the Power In connector on the TempBook (see
figure).
Connecting the TempBook to the Battery Module
The run time available from a DBK30A operating a TempBook will depend on what the TempBook is
doing. This time can be as little as 3 hours or as much as 6 hours.
CAUTION CAUTION CAUTION CAUTION
The DBK30A must periodically be fully discharged or the cells may develop "lazy
chemistry" that may limit storage capacity. (This “memory” is characteristic for
nickel-cadmium batteries.) To manually discharge a battery pack, connect a
TempBook, and leave it turned on until the indicator lights go dark.