Keithley 428-PROG Current Amplifier with GPIB Interface

Description

Keithley 428-PROG Current Amplifier with GPIB Interface
The Model 428-PROG Programmable Current Amplifier converts fast, small currents to a voltage, which can be easily digitized or displayed by an oscilloscope, waveform analyzer, or data acquisition system. It uses a sophisticated “feedback current” circuit to achieve both fast rise times and sub-picoamp noise. The gain of the Model 428-PROG is adjustable in decade increments from 103 V/A to 1011V/A, with selectable rise times from 2µs to 300ms.
The Model 428-PROG offers fast response at low current levels, which is unmatched by either electrometers or picoammeters. The nine current amplification ranges allow the greatest flexibility in making speed/noise tradeoffs. The Model 428-PROG can be used with any of Keithley’s data acquisition boards to implement a very cost-effective, low curreent measurement system with wide bandwidth and fast response.
Conditions
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The display shows 'Overload' when power on. We did not do any further test beyond that. As such, we are selling it at 'as is where is' condition. The unit is in nice cosmetic condition.
Return Policy
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We do not accept return for this unit.
Payment
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We accept paypal or bank wire transfer.
Shipping
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We ship via TNT/FedEx/DHL/UPS. The shipping cost is estimated and the actual cost will be quoted upon confirmation of buyer's shipping address. Buyers can also use your own preferred shipping forwarders/couriers.
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* Remarks: We have been inactive in Ebay for several years and we only start to list test equipment sale very recently. We look forward to receive your supports. Pls feel free to contact us for any further enquiries. Thanks for watching.