For the Agilent 66311B DC power supply with output current fluctuation issues, common repair fault points usually include:

1. Aging or damaged output filter capacitors, which may lead to increased ripple and unstable current output.
2. Malfunctioning components in the current sensing circuit (e.g., precision resistors, operational amplifiers) that result in inaccurate current detection.
3. Degraded or poorly contacted power switching elements (like transistors or modules) affecting stable current output.
4. Loose connections in output terminals or internal wiring causing intermittent current variations.

Regarding the repair and maintenance of this instrument, 匠析生物 can provide professional solutions. Our company specializes in offering comprehensive services for lab instruments including Agilent, Thermofisher, Waters, etc., covering repair, maintenance, calibration, and parts replacement. For your Agilent 66311B DC power supply issues, our experienced technicians can diagnose and resolve the fault points efficiently. We also offer regular maintenance services (such as cleaning, component inspection) to prevent similar problems from occurring. If you need related support, feel free to contact us for a tailored solution.