Fluke TRACKERTM 90100 - Manual (Page 30)

Model 90100
Operators Manual
3-2
Figure 3-1. Hardware Block Diagram of the Model 35360A TRACKER Display
3.2.1 Power Supply
The Power Supply converts AC line power in the range of 100 to 240 VAC, or 6 VDC from the internal
rechargeable battery pack, to the various DC voltage levels that are used to power all of the other blocks
of the system. These interconnections have been omitted from the diagram for clarity. The Power Supply
also includes a high performance charger for the internal Battery Pack. This Battery Pack will normally
provide a continuous operational life of approximately 8 hours on one charge. The batteries may be
charged in about 2 to 3 hours and charging will take place even when the instrument is in use. When the
batteries have reached their fully charged level, the charger automatically enters a trickle charge mode.
During trickle charging, the user need not be concerned about over charging the batteries. This mode will
maintain the Battery Pack at its fully charged condition indefinitely.
When operating from batteries, an automatic turn off feature may be used to power down the unit after a
user-defined period of inactivity. A low battery annunciator is displayed when less than 30 minutes of the
useful battery life remains, and an automatic power down will occur when the Battery Pack is completely
exhausted. All front panel settings are automatically stored at power down and restored at power up.
Thus, the need to reconfigure the front panel settings upon each use has been eliminated.
Although the Power Supply is under the control of the microcontroller during normal operation through the
Power Control connection shown, it is forced to turn on when the operator presses the front panel Power
On/Off button. The BATTERY STATUS connection between the Power Supply and the Processor blocks
provides the means by which the microcontroller can monitor the battery voltage and thus detect low and
exhausted batteries. This voltage is automatically displayed during the power up sequence and may be
viewed at any time on one of the test screens.
BATTERY
STATUS