BRUEL & KJAER 1623 - Power Supply; Rechargeable Cells (8 & K No. QB 0008)

Fig. 3 . 2. The Portable Vibration Meter Type 2511 combined with
the Tracking Filter Type 1623 mounted in a sturdy, hard-
foam carrying case KA 2000
3.2. POWER SUPPLY
There are several methods of supplying power to the 1 623, they are described in the fol-
lowing subsections . Whichever supply method is used, check that the battery condition
indicating meter deflects to the blue/green area, thus indicating sufficient supply vol-
tage .
3.2.1. Rechargeable Cells (B & K no. QB 0008)
Six rechargeable nickel-cadmium cells are supplied with the 1623. They are each rated
at 1 ,2 V with a capacity of 4 Ah and are specified to give at least 500 charge cycles be-
fore replacement i·s necessary. The need for replacement is indicated by the cells failing
to reach a fully charged condition after being left on charge for 14 hours or more (with
battery charger ZG 0113 supplied). A fully charged battery can be expected to give a con-
tinuous operating capacity of 8 hours. The cells are mounted in the 1 623 as follows:
1. Lay the instrument on its left side panel (viewed from the front) imd remove the
screw marked Battery on the rear panel. The side panel can now be slid out of the
instrument body.
2. Place the cells in the compartment with their polarities as indicated. (See Fig.3.3.)
WARNING: There is a possibility of explosion if recharging is attempted on cells
that have been fitted with their poles reversed.
3. Replace the side panel and stand the instrument on its feet, or use the stand to
raise the front panel as desired.
4. Slide the power supply switch on the rear panel to Internal Battery.
5. Set the BATIERY switch to On, and check that the battery condition indicating me-
ter registers in the blue/green area, indicating that the battery is in usable condi-
tion .
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