Manual for 6269B

3-1 TURN-ON CHECKOUT PROCEDURE

This procedure ensures the supply is operational by checking controls and indicators.

1. Turn LINE circuit breaker ON and check pilot light.
2. Adjust VOLTAGE controls for desired output.
3. Test overvoltage crowbar by rotating OVERVOLTAGE ADJUST counterclockwise until it trips.
4. Deactivate crowbar and verify voltage.
5. Turn supply OFF, short output terminals, turn ON to check constant current.
6. Adjust CURRENT controls for desired output current.
7. Remove short, read further before connecting load.

3-3 OPERATING MODES

Mode selection is done via rear terminal strapping. Default is constant voltage/constant current, local sensing, local programming, single unit.

3-5 NORMAL OPERATING MODE

Operator selects constant voltage or current using front panel controls.

3-7 CONSTANT VOLTAGE

To select constant voltage:

1. Turn ON supply, adjust VOLTAGE controls for desired output with open terminals.
2. Short terminals, adjust CURRENT controls for max allowable current limit. The supply will cross over to constant current if the limit is exceeded.

3-9 CONSTANT CURRENT

To select constant current:

1. Short terminals, adjust CURRENT controls for desired output current.
2. Open terminals, adjust VOLTAGE controls for max allowable voltage limit. The supply will cross over to constant voltage if the limit is exceeded.

3-11 OVERVOLTAGE TRIP POINT ADJUSTMENT

Adjustable via front panel control. Ranges vary by model (2-12Vdc, 2-23Vdc, 4-45Vdc). Trips when output voltage is exceeded, shorting the output and lighting an amber indicator.

3-14 CONNECTING LOAD

Use separate, short, twisted/shielded wires for each load. Remote sensing is recommended for remote loads. Positive or negative voltages can be obtained by grounding terminals. Unit can operate up to 300Vdc above ground.

3-18 NO LOAD OPERATION

With no load, programming speed is slower. Output will fall to approx. 2 volts, then slowly to zero.

3-20 OPERATION BEYOND RATED OUTPUT

Shaded area on meter face indicates available output beyond rated specs. Operation in this region is safe but not guaranteed to meet specs.

3-22 OPTIONAL OPERATING MODES

Includes Remote Programming (Voltage & Current), Remote Sensing, Auto-Parallel, Auto-Series, and Auto-Tracking operations.