Using The Power Supply - Fisher Scientific FB3000-2 Manual De Instrucciones

O
PERATION
Note
The unit will not crossover and control
for temperature when the unit is in the
Constant Current, Constant Voltage,
or Constant Power mode. The only
time the unit will control for tempera-
ture as an upper limit is when the unit
is in the Constant Temperature mode
(See Constant Temperature
Operations section for details).
8

Using the Power Supply

Press the dark gray key on the front of the unit to
enable/disable the control logic. The LCD display will illumi-
nate and allow selection of MANUAL or PROGRAM mode
of operation as well as enable/disable automatic power-fail
restart. Toggle automatic power-fail restart by pressing the
topmost function key to the right of the display. Select
MANUAL or PROGRAM mode using the function keys to
the right of the display (see Programming section for pro-
gramming mode description). In manual mode, the FB3000
preserves the constant setpoint each time you start a run.
The constant parameter is saved independently for each
mode; constant voltage, current, power, and temperature.
To change the control mode, press the Exit key. From the
resulting screen, select the new constant parameter using
the function keys to the right of the display.
After selecting a control mode and setting the limit and
timed run parameters if desired, press the Run key to ener-
gize the power supply output. The power supply output will
ramp up to the appropriate setpoint, while not allowing any
limit parameter to be exceeded. If any limit parameter
should be exceeded, then the power supply will crossover
control modes, making the limit parameter the new control
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 volt-
age, current, power, and temperature. The time value dis-
plays elapsed time for an untimed run, or time left for a
timed run. The volt-hour value displays the accumulated
volt-hour value for the run.