HP 4260A

HP 4260A

HP 4260A - Universal Bridge

The HP 4260A is a universal bridge for easy measurement of resistance (R), capacitance (C), inductance (L), capacitor dissipation factor (D), or inductance quality factor (Q).

The instrument includes five bridge circuits as well as the detector and 1 kHz oscillator. The instrument has input for external oscillator (from 20 Hz to 20 kHz) for other measurement frequencies than 1 kHz.

The HP 4260A has been made by Hewlett Packard and first time introduced in Hewlett Packard Journal, September, 1966.


Capacitance Measurement  
Capacitance
  • Range: 1 pF to 1000 µF in 7 ranges
  • Accuracy:
    ± (1% + 1 digit), from 1 nF to 100 µF
    ± (2% + 1 digit), from 1 pF to 1 nF
    and 100 µF to 1000 µF
  • residual capacitance approx. 2 pF
    		•
    Dissipation Factor
  • Range:
    of series C: 0.001 to 0.12
    of parallel C: 0.05 to 50
    		•
    Inductance Measurement  
    Capacitance
  • Range: 1 µH to 1000 H in 7 ranges
  • Accuracy:
    ± (1% + 1 digit), from 1 mF to 100 H
    ± (2% + 1 digit), from 1 µH to 1000 H
  • residual capacitance less 1 µH
    		•
    Quality Factor
  • Range:
    of series L: 0.02 to 20
    of parallel L: 8 to 1000
    		•
    Resistance Measurement  
    Resistance
  • Range: 10 miliΩ to 100 MegaΩ in 7 ranges
  • Accuracy:
    ± (1% + 1 digit), from 10 Ω to 1 MegaΩ
    ± (2% + 1 digit), from 10 miliΩ to 10 Ω
    and 1 MegaΩ to 100 MegaΩ
  • residual resistance approx. 3 miliΩ
    		•

    Figure 1 shows left side of HP 4260A and Figure 2 shows internal component locations.


    HP 4260A left side
    Fig. 1

    HP 4260A left side

    Fig. 2
    Figure 3 shows a right side of HP 4260A and Figure 4 shows internal component locations.

    HP 4260A right side
    Fig. 3

    HP 4260A right side

    Fig. 4
    Figure 5 shows a top side of HP 4260A and Figure 6 shows internal component locations.

    HP 4260A top
    Fig. 5

    HP 4260A top

    Fig. 6