Model 2461 Interactive SourceMeter® Instrument Reference Manual Section 2: General operation2461-901-01 A/November 2015 2-131You can increase the amount of delay time by either setting a fixed amount of time or setting theinstrument to include an automatic delay. The delay can be from 0 to 10,000 seconds.If you select an automatic source delay, the delay time depends on the selected range. Values for thedelay times for each range are shown in the following table.Current range Voltage sourceautodelay (ms)With highcapacitance(ms)Current sourceautodelay (ms)With highcapacitance(ms)1 μA 3 20 3 2010 μA 2 10 2 10100 μA 1 10 1 101 mA 1 10 1 1010 mA 1 5 1 5100 mA 1 5 1 51 A 1 5 2 54 A 1 5 2 55 A 1 5 2 57 A 1 5 2 510 A(pulse only)1 5 2 5For high impedance and high capacitive loads, more settling time is required for the source. Theactual delay period you need can be calculated or determined by trial and error. For purely resistiveloads and at higher current levels, the programmable delay can be set to 0 ms.The measure time depends on the selected measurement speed. For example, if the speed is set at0.01 PLC, the measure time would be 167 ms for 60 Hz operation (0.01/60).Setting the source delayUsing the front panel:1. Press FUNCTION and set the source and measurement function.2. Press the MENU key.3. Under Source, select Settings.4. Select the button next to Source Delay and enter a value.5. Click OK.Using a remote interface:• SCPI commands: Refer to :SOURce[1]::DELay (on page 6-89).• TSP commands: Refer to smu.source.delay (on page 8-183).GraphingThe graphing features of the Model 2461 allow you to view your measurement data graphically. Youcan compare up to four traces on the front panel of the instrument. You can manipulate the graph toview minimums and maximums, view averages, determine deltas, and view the values of specificdata points.
