Model 90100
Operators Manual
BATTERY |
STATUS |
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
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.
