DOCUMENT SUBJECT TO U.S. EXPORT CONTROLS, COMPLIANCE APPROVIAL REQUIRED PRIOR TO DISTRIBUTION
IM4830, Page 4
1.
POWER/CHARGE CONDITIONS
Power is provided by an internally mounted NI-CAD battery pack, which can be charged by
applying a regulated 9V D.C. source to the DC input connector. The 9V source will also provide all
the power required by the unit, reverting to battery power when the source is removed
The internal battery charger will complete a full charge within 4 hours, the battery management
system detects battery and ambient under/over temperature, cell voltage, fast charge time and
reverts to trickle charge when limits have been reached. There are two LED's provided to indicate
current status, power/trickle 'Charge and Fast Charge'.
To charge the 4830A switch the power switch on the unit to “1”, connect the power supply and
switch it on. The red “fast charge” and orange “trickle charge” LEDs should both be lit. Once the unit
is fully charged in the red, “fast charge” LED will extinguish. The orange “trickle charge” LED will
remain lit indicating that the battery voltage is being maintained / topped up by a trickle charge
current. This configuration is recommended for optimum charging of the unit.
A power low warning shown on the bottom line of the display and can be cleared by taking the
cursor position into the mode area i.e.: Hertz, but the message will be re-displayed in approximately
1 minute. Failure to charge will result in the unit powering down (display will blank) while retaining
the units last settings.
2.
POWER MANAGEMENT
The unit will enter its 'Power Save' mode after approximately 5 minutes from the last keyboard
action. This can be disabled by depressing the left and right keys together, a message will be
displayed 'Auto-power down' and on releasing the keys a '*' symbol can be seen in the right-hand
bottom corner indicating the auto power down function is disabled.
NOTE: In this mode a significant reduction in battery operation times can be experienced, do not
leave unit on when not in use.
To enable 'Auto-Power shutdown' depress the left and right keys again on release the '*' symbol will
be removed, auto-power mode is now enabled.