Simpson 460 4 Series - Battery Charging; Fuse Replacement

Servicing Instructions
7.3 BATTERY CHARGING (460-4D only):
a. The battery is being charged at full rate when the POWER
switch is set to the OFF position and AC power is applied to
the Instrument. Approximately 16 hours are required to fully
charge the battery in this mode of operation.
NOTE: If the battery voltage checks below +4.7 volts,
charge the battery with the POWER switch set to OFF
for at least 15 minutes before operating the Instrument.
b. The battery is being “trickle” charged whenever the Instru-
ment is operated by the AC powerline.
7.4 FUSE REPLACEMENT
7.41 The line and current fuses are mounted inside fuse holders
on the main P.C. Board as shown in Figure 7-1. Use the following
procedure to replace a fuse:
И
4
Remove all power and input connections to the Instru-
ment before removing bottom cover. Do NOT replace a
blown fuse with a fuse which has a larger rating or
slower time lag characteristic than those specified.
a. Remove bottom cover as described in paragraph 6.2.
b. Carefully lift the defective fuse from the holder and replace
with appropriate fuse (Table 7-2).
c. Replace the bottom cover.
7-2