DC Current Source

Programmable Current Source

The Model 121 programmable DC current source is a precision instrument suitable for bench-top use or panel-mounted operation in labs, test facilities, and manufacturing environments. It provides a low-noise, highly stable source of current up to 100 mA, with convenient manual selection through 13 pre-set output levels, each representing a ten-fold change in power when attached to a resistive load. A “user” setting allows the current output to be defined anywhere within the operating range of the unit, from 100 nA to 100 mA.

Programmable operation is also possible via the instrument’s USB computer interface, through which the Model 121 can be commanded to output any desired current at any time. Thus, application-specific test currents can be driven from an external PC.

The instrument operates at 5 VDC, and power is supplied by the external AC wall-mount supply provided with the standard Model 121. The supply will automatically conform to any AC line voltage ranging from 100 VAC to 240 VAC, 50 or 60 Hz. Model 121 product overview...

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  1. Model 121 current source
    Model 121 programmable DC current source-includes one 2-pin terminal block (G-106-735), one power supply (109-132), calibration certificate, and Model 121 user manual (119-061) Learn More
    Product Code:
    • 121
  2. Model 121 current source, no power supply
    Model 121 programmable DC current source-includes one 2-pin terminal block (G-106-735), calibration certificate, and Model 121 user manual (119-061), no power supply Learn More
    Product Code:
    • 121N

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