Fisher FB300-2 manual Getting Started, Using the Power Supply

Getting Started

Select a location that allows for 3" clearance behind the power supply, and comfortable reach of the front panel controls and cell connections. Do not block the vented area of the case - on the front bottom of the unit, or the fan area at the rear. Connect the power supply to a 3-prong grounded AC outlet, using the AC cord provided with the unit only. Connect the electrophoresis apparatus to the power supply, making sure to match the red positive lead to the red positive jack, and the black negative lead to the black negative jack. Similarly, connect one or two more electrophoresis apparatus to the power supply if you plan to run more than one in parallel. Power the unit on using the AC power switch located at the rear of the unit, next to the AC line cord entry.

black negative jacks 3 digit LED display

up/down arrows

select key (Set)

constant key (K)

run key

red positive jacks gray ON/OFF key

Figure 1. Front Panel Controls

Using the Power Supply

Press the gray key on the front center of the unit to enable the control logic. The 3-digit display will illuminate and show the setpoint value of the last saved run setup. The FB300 preserves the run settings each time you start a run. One set of conditions is saved for each mode, constant voltage or constant current. The setpoint value, limit parameter, time duration, and power-fail restart setting is saved. This allows convenient setup for repetitive runs.

To change the control mode, press the constant key. This key toggles control from constant voltage to constant current. Each time, the FB300 will display the last saved setpoint value for that particular mode.

After selecting a control mode, either constant voltage or current, and setting the limit and timed run parameters if desired (see Constant Voltage/Current Operations) press the Run key to energize the power supply output. The power supply output will ramp up to the appropriate setpoint, while not allowing the limit parameter to be exceeded. If the limit parameter should be exceeded, then the power supply will crossover control modes, making the limit parameter the new control setpoint. The front panel constant mode LED indicator will change to indicate that a crossover has occurred.

FB300-2 MANUAL Page 5 7608001 Rev A 8/02