My 6221 does not put out curent and the blue light blinks continuously.
Please contact Tektronix service team directly. Below you can find the contact information for our Service Department and someone will be happy to help:Tektronix/Keithley Repair/Calibration: Web: https://www.tek.com/en/service-quoteEmail: rmarequest@tektronix.comCalibration services for all other products: Web: https://www.tek.com/fastquote Email: mvs@tektronix.com
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