Measurement Computing WaveBook rev.5.3 - Manual (Page 59)

Fuse Replacement
DBK34A contains four MINI ATO fuses that can be replaced by the user. Note that you should always
check your unit for blown fuses prior to sending it back to the factory for repair. This could save you time
and money.
The following table indicates the probable reason that a particular fuse may have blown, and includes part
numbers and fuse rating.
Fuse Rating Probable Cause of Blowing Fuse Replacement Fuse
F1 7.5 A Auxiliary Battery overload. 7.5A MINI ATO, LITTLEFUSE# 297-07.5
F2 7.5 A Output overload. 7.5A MINI ATO, LITTLEFUSE# 297-07.5
F3 7.5 A Output overload. 7.5A MINI ATO, LITTLEFUSE# 297-07.5
F4 15 A Input overload. 15A MINI ATO, LITTLEFUSE# 297-015
DBK34A, Fuse Location Reference
To replace a fuse:
1. Disconnect the DBK34A from loads and from supply power.
2. Remove the DBK34A’s cover plate. This requires the removal of 4 screws
(2 per side).
3. Examine the fuses (F1 through F4) to see which, if any, have blown. Note that
you can usually see the blown element through the fuse’s transparent casing.
4. Replace the blown fuse with the appropriate replacement fuse (see preceding
table). Note that the fuse value is present on top of the fuse; also, the fuses are
color coded as an aid to identification.
5. Replace the DBK34A cover and secure with screws (removed in step 2).
DBK34A UPS / Battery Module - Specifications
Name/Function: Vehicle UPS Module
Battery Type: Sealed-lead rechargeable
Number of Battery Packs: 2
Battery Pack Configuration: 6 series-connected D cells
Output Voltage: 12 V or 24 V (depending on jumpers)
Output Fuses: 8 A on each internal battery (2)
Battery Capacity (Amp-Hours):
5 A-hr in 12 V mode (parallel)
2.5 A-hr in 24 V mode (series)
Operating Temperature: -20°F to 122°F (-29°C to 50°C)
Size: 81⁄2 × 11 × 13⁄4 in. ( 216 × 279 × 44 mm)
Weight: 7.2 lb (3.27 kg)
WaveBook User’s Manual 979194 System Setup and Power Options 2-39