In this video I am calibrating the Gophert CPS-3205C power supply using my Keithley 175 4.5 digit multimeter and my adjustable dummy load.

The calibration procedure is:
1. Set the V/A selector switch to A position,
2. Push the adjust knob then power on the power supply,the meter will display PUSH OFF,
3. Press the ON/OFF button one time then press the LOCK button two times, the unit will go into voltage calibration (please note calibrate the voltage with no load), the voltmeter displays 01.00 and amp meter displays 001.
4. please adjust the adjust knob to set the output voltage to 1.005V,( you can push the adjust knob to select the range of adjusting) then press the ON/OFF button to calibrate the output voltage to 10.00V and 30.00V, after 30V voltage has been calibrated, please press the ON/OFF button to go into current calibration, connect your electronic load to the output terminal of the power supply, the unit must operate in C.C mode,the amp meter displays 1.00 and the voltmeter displays 0001, please adjust the adjust knob to set the output constant current to 1.000A, then press the ON/OFF button to calibrate the output constant current 5.000A,after 5.0A has been calibrated then press the ON/OFF button to finish the calibration.

I got this HP Agilent E3611A from Ebay. It was marked as not working and I was planing a repair video on it. Unfortunately the unit turned out to be fully functional so I only did a teardown and calibration.

In this video I’m opening up my mail items on camera. I have the ESP8266 EVB from Olimex, an Edison vintage light bulb from ebay, WS2812 led pcb strip, LCD FPC various pitch breakout pcb, TL081 jfet opamp, breadboard jumper wire kit and the HP E3611A power supply.

In this episode I am unboxing the newly acquired Rigol DS1054Z. This is not a review, I am just showing what you get inside the box if you plan to purchase one.

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