Measurement Computing WaveBook rev.3.0 - Manual (Page 91)

WaveBook User’s Manual, 6-21-99 System Power & Assembly 4-7
DBK34 - Vehicle UPS Module
DBK34 Front Panel
The DBK34 can power a data acquisition system in portable and in-vehicle applications (from 12 VDC or
24 VDC systems). Power storage capacity is:
5 A-hr @ 12 VDC or, 2.5 A-hr @ 24 VDC
For reliable data acquisition in a vehicle, the DBK34 provides clean and consistent operating power for the
following instances:
• Prior to engine/generator start.
• During engine start-up (battery sag due to the high-current demand of starter motor and solenoid).
• After engine turn off.
The DBK34 contains two sealed-lead rechargeable batteries and associated charging circuits and current
indicators. Typically, these batteries can last more than 500 full cycles and up to 10 years standby lifetime
at room temperature. Recharging is fast, and extreme temperature performance is good. The DBK34 can be
used with the LogBook, DaqBook, WaveBook, and related DBKs and WBKs. The unit’s rugged metal
package has a compatible 8×11” footprint for convenient stacking with Velcro tabs and optional splice
plates and handles for carrying.
Main and auxiliary power input comes from 12 or 24 VDC via a terminal block (TB1) on the unit’s front
panel. The voltage mode is configured with jumpers on TB1. Automatic charging circuits recharge the
internal batteries quickly and safely. The charged battery runtime will depend on the load and mode of
operation.
Note: Current protection is provided by four fuses. Two 8A fuses for the units internal batteries, one 8 A
fuse for an auxiliary (external) battery, and a 15 A fuse for a vehicle battery.
You can use a CA-172 cable to connect a vehicle battery (via a cigarette lighter) to the DBK34
terminal board. The cable is six feet long, contains a cigarette lighter adapter at one end, and
stripped leads (for terminal connection) at the other.
For trouble-free operation, you must fully charge the batteries before use.