Simpson 460 4 Series - Page 28

Operation
4.3.1 For AC Line Operation:
a. Ensure that the power source used matches the requirements
of the Instrument as marked on rear panel.
b. Insert the plug into a 3-wire power outlet which conforms to the
latest National Electrical Code. The 460D will operate with or
without battery power. When the 460D is operating on the
AC line with the internal battery installed, the battery is be-
ing “trickle” charged.
4.3.2 For 460D battery operation follow this procedure:
Do not operate the Instrument with cells in the com-
pletely discharged state, which is common for all new
Cells as required from the vendor. (Paragraph 7.3.)
a. Disconnect the AC line cord and set the POWER switch to
the OFF position. Install four “D” size nickel-cadmium cells
(not supplied with Instrument). Observe polarity as shown on
label inside battery holder. Re-assemble case and turn power
ON.
b. Depress the DCV function and 20 (10А), range switches.
c. Connect a test lead between the У-О jack and the BATTERY
TEST jack. The reading must be between +4.7 volts, or if the
display does not emit light, either the battery is improperly in-
stalled or recharging is required.
d. If the battery voltage is below +4.7 volts, or if the display
does not emit light, either the battery is improperly installed
or recharging is required.
4.3.3 To recharge the battery, follow this procedure:
a. Set the POWER switch to the OFF position. Connect the line
4-3