3-14 Basic Operation Models 2500 and 2502 User’s Manual
Using the analog outputs (Model 2502 only)
Each analog output provides a -10V to +10V DC output analogous to the input current.
The analog output signal will nominally source a ±10V proportional, but inverted, signal
to the input current on all measurement ranges. For example, with a +1mA current on the
2mA measurement range, the analog output voltage would be -5V. Table 3-8 list typical
analog output voltages for various ranges and input currents.
Table 3-7
Basic measurement command sequence
Step
1
Action Commands
2,3
Comments
1
2
3
4
5
Select channel 2 measure range.
Select channel 2 current reading.
Set channel 2 source range.
Set channel 2 source amplitude.
Turn on channel 2 output.
Read data.
Turn off channel 2 output.
*RST
:SENS2:CURR:RANG 2e-6
:FORM:ELEM CURR2
:SOUR2:VOLT:RANG 10
:SOUR2:VOLT 10
:OUTP2 ON
:READ?
:OUTP2 OFF
Restore GPIB defaults.
Select 2µA range.
Return channel 2 reading.
Select 10V source range.
Source 2 output = 10V.
Output on before measuring.
Trigger, acquire reading.
Output off after measuring.
1
Steps correspond to front panel steps previously in “Front panel measurement procedure.”
2
Commands must be sent in order given.
3
Instrument must be addressed to talk after :READ? to acquire data.
Table 3-8
Analog output voltage examples
Range Input Current Analog Output
20nA +10nA -5V
2µA -2µA +10V
20µA +7µA -3.5V
2mA +0.5mA -2.5V
20mA -15mA +7.5V
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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