Constant Voltage Operations; Constant Current Operations; Timed Operations - Fisher Scientific FB200-2 Manual Del Operador

setpoint. The run mode display shows the controlled parameter highlighted, and will
automatically change if a crossover has occurred.
To stop a run in progress, press the Run key, the Stop key, or the gray ON/OFF key. The display
will change to "STOP" signifying that the output is no longer energized. To pause a run in
progress, press the Pause key. The display will change to "PAUSE" signifying that the output is
no longer energized, and that the run can be resumed. Pressing Run or Pause resumes the run
from the previous point (i.e. for a timed run). Only a run that has been paused can be restarted.
After Stopping a run, or to change parameters of a (paused) run, you must cycle the control logic
off and then back on by pressing the gray ON/OFF key.
During a run, the display will show the actual values of voltage and current. The time value
displays elapsed time for an untimed run, or time left for a timed run.

Constant Voltage Operations

From the mode selection screen, select constant voltage operation by pressing the appropriate
function key located to the right of the display. To get to the selection screen from an operating
screen, press Exit, or cycle the control logic off and then back on by pressing the gray ON/OFF
key. The FB200 will display the last saved values for constant voltage mode. To change a
parameter, press the function key located to the right of the display, next to the parameter you
wish to change. The FB200 will allow a new value to be entered using the keypad numeric keys.
Press the function key labeled "Enter" to complete the new setting. Press Clear to erase previous
keystrokes. Press Exit to cancel entering a new value. The FB200 will not accept a voltage
setpoint outside of the allowed range. Press Clear to re-enter an appropriate value.
The limit parameter, in this case current, is normally set to the power supply maximum value of
2.00 A. The FB200 will not accept a current limit outside of the allowed range.
In addition, the FB200 will never exceed the maximum power output specification of 200W.
When starting a run, the power supply calculates a maximum limit parameter, above which the
power supply maximum power output rating would be exceeded. If this value is lower than the
limit setpoint entered, the FB200 will automatically lower the limit parameter.

Constant Current Operations

From the mode selection screen, select constant current operation by pressing the appropriate
function key located to the right of the display. To get to the selection screen from an operating
screen, press Exit, or cycle the control logic off and then back on by pressing the gray ON/OFF
key. The FB200 will display the last saved values for constant current mode. To change a
parameter, press the function key located to the right of the display, next to the parameter you
wish to change. The FB200 will allow a new value to be entered using the keypad numeric keys.
Press the function key labeled "Enter" to complete the new setting. Press Clear to erase previous
keystrokes. Press Exit to cancel entering a new value. The FB200 will not accept a current
setpoint outside of the allowed range. Press Clear to re-enter an appropriate value.
The limit parameter, in this case voltage, is normally set to the power supply maximum value of
200 volts. The FB200 will not accept a voltage limit outside of the allowed range.
In addition, the FB200 will never exceed the maximum power output specification of 200W.
When starting a run, the power supply calculates a maximum limit parameter, above which the
power supply maximum power output rating would be exceeded. If this value is lower than the
limit setpoint entered, the FB200 will automatically lower the limit parameter.

Timed Operations

It is possible to enter an amount of time for the power supply to provide power, after which it will
automatically shut off. Use this feature for timed runs.
FB200-2 MANUAL Page 6 7608175 Rev A 8/02