Keithley 6220 DC - Output Response and Filter Control; Remote Programming Autorange; Changing Output Response; Analog Filter Control

Model 6220/6221 User’s Manual DC Current Source Operation 3-13
Return to Section 3 topics
Remote programming – Autorange can be used when setting the I-source
value. With autorange enabled, the Model 622x will automatically select the
optimum (lowest) range to accommodate the source value.
The commands to select the source range, and set the output and
compliance values are provided in Table 3-2. The following examples
demonstrate proper syntax.
Example – Select the 20mA source range, set the source to output 12mA,
and set compliance to 10V:
* To select a fixed source range, specify a parameter value that is the same as
the current output value to be sourced. For the parameter value “12e-3”, the
Model 622x selects the lowest range (20mA) that will accommodate a 12mA
output.
3. If desired, change the output response.
For the Models 6220 and 6221, an analog output filter can be enabled to
slow down the output response. For the Model 6221, the output response
can be set to FAST or SLOW. See “Output response”, page 3-5 for details
on setting the output response.
Analog filter – Use the FILT key to toggle the state (on or off) of the
low-pass filter. When this key is first pressed, the message “FILTER ON”
will be briefly displayed and the “FILT” annunciator turns on. To disable the
filter, again press the FILT key (“FILT” annunciator turns off).
Response speed setting (6221) – The response speed can only be
changed while the output is off. Response speed is set as follows:
a. Press the CONFIG key and then the OUTPUT key to display the output
response menu.
b. Using the controls for “Menu navigation” on page 1-14, select the FAST
or SLOW (6220 STYLE) response speed.
For remote programming, the commands to set output response are
shown in Table 3-2. The following example demonstrates proper syntax.
CURRent:RANGe 12e-3 ‘ Selects the 20mA range.*
CURRent 12e-3 ‘ Sets the DC output to 12mA.
CURRent:COMPliance 10 ‘ Sets voltage compliance to 10V.
NOTE If the output was on when attempting to access the out-
put response menu, the output will turn off. Repeat step
a above to access the output response menu.