Reference Materials - Hitachi DS 14DVF2 Technical Data And Service Manual

B. Suggestions and precautions for the efficient use of the charger and storage batteries
If the Types EB 1414, EB 1414S, EB 1214L, EB 1214S, EB 914 and EB 914S Storage Batteries are exposed to
direct sunlight for an extended period or if the tool has just been operated for a long time, charging may not be
possible if the temperature of a battery is above 40 ˚C (104 ˚F). In such a case, the customer should be advised
to place the battery in a shaded area with a good airflow, and allows sufficient cooling before recharging. This
phenomenon is common to all existing batteries and chargers which employ temperature sensitive overcharge
protection devices. The cooling time required before recharging can be accomplished varies from a few minutes
to about 30 minutes, depending on the load, duration of use, and ambient temperature.

9. REFERENCE MATERIALS

Speed Control Mechanism
Spindle rotation speed of the Models DS 14DVF2, DS 12DVF2 and DS 9DVF2 can be controlled by simply
varying the amount by which the trigger switch is depressed. The relationship between the amount the trigger
switch is depressed (in millimeters) and the rotation speed is illustrated in Fig. 3.
Note: The gradient and values illustrated in Fig. 3 are intended for reference only, and will vary slightly due to
differences in the discharge condition of the battery, the ambient temperature, and individual speed-
control element accuracy.
(%)
100
60 5
12 8
0
2.2 0.5
Amount trigger switch is depressed (mm)
Fig. 3
--- 15 ---
8 +0.5
6.5 0.5
0