Hitachi DS12DVF3 — рекомендации по эффективному использованию зарядных устройств и аккумуляторов [16/34]

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B. Suggestions and precautions for the efficient use of the charger and storage batteries

If the Types EB 1214S, EB 1220BL 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 ûC (104 ûF). 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 12DVF3 and DS 9DVF3 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. 4.

NOTE: The gradient and values illustrated in Fig. 4 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

Rotation speed

60 5

(%)

12 8

2.2 0.5

6.5 0.5

+0.5

Amount trigger switch is depressed (mm)

Fig. 4