Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation077085501 / February 2015 2-69Setting overcurrent protection limitsTo set overcurrent protection using the front panel:1. Press the MENU key.2. Under Source, select Protect.3. Select OCP and set the limit.4. Select HOME to return to the operating display.To set overcurrent protection using SCPI commands:To set the overcurrent limit for the current source to 4 A, send the command::CURRent:PROTection 4See the command description for [:SOURce[n]]::PROTection[:LEVel] (on page 7-65) for thefull list of options.Overtemperature protectionTo prevent damaging heat build-up and ensure specified performance, make sure there is adequateventilation and air flow around the instrument to ensure proper cooling. Do not cover the ventilationholes on the top, sides, or bottom of the instrument.Even with proper ventilation, the instrument can overheat in the following situations: If the ambient temperature is too high. If you use the instrument as a power sink for long periods.If the instrument overheats, the output is turned off and an event message is displayed.If an overtemperature condition occurs, turn off the instrument and allow it to cool for 30 minutes.You cannot turn the output on until the instrument cools down. Verify that there is adequateventilation. When you return power to the instrument, verify that the cooling fan is running. If not,contact Keithley Instruments. Leaving the instrument turned on with the failure message displayed orwith an inoperative cooling fan may result in damage to the instrument.
