Table 2-12 Remote Voltage Bias Source Calibration Summary - Keithley 2520 Service Manual

Model 2520 Pulsed Laser Diode Test System Service Manual
Table 2-12
Remote voltage bias source calibration summary
Voltage bias channel
Detector 1
Detector 2
*Command parameter values are negative of the displayed DMM reading.
Step 6: Current measurement calibration
Follow these steps to calibrate current measurements for both photodiode detector
channels.
1.
2.
3.
4.
5.
6.
Calibration voltages
+20V
0V
-20V
+20V
0V
-20V
Table 2-13 summarizes calibration currents and commands.
Select the DMM DC voltage function, and enable auto-range.
Temporarily short the ends of the DMM test leads together, and enable the REL
mode to null offsets.
Connect the DMM and 2kΩ resistor to the Model 2520 testhead DETECTOR 1
jack, as shown in Figure
Send the following command to select the 10mA range:
:SENS2:CURR:RANG 10e-3
Put the unit into the DC mode:
:SOUR1:FUNC:SHAP DC
Select positive current measurement polarity:
:SENSE2:CURR:POL POS
Calibration commands*
:DIAG:KEIT:FCON:HI ON
:OUTP1 ON
:SOUR2:VOLT 20
:CAL:PROT:SOUR2 -<DMM_Reading>
:SOUR2:VOLT 0
:CAL:PROT:SOUR2 -<DMM_Reading>
:SOUR2:VOLT -20
:CAL:PROT:SOUR2 -<DMM_Reading>
:OUTP1 OFF
:DIAG:KEIT:FCON:HI OFF
:DIAG:KEIT:FCON:HI ON
:OUTP1 ON
:SOUR3:VOLT 20
:CAL:PROT:SOUR3 -<DMM_Reading>
:SOUR3:VOLT 0
:CAL:PROT:SOUR3 -<DMM_Reading>
:SOUR3:VOLT -20
:CAL:PROT:SOUR3 -<DMM_Reading>
:OUTP1 OFF
:DIAG:KEIT:FCON:HI OFF
2-7.
Calibration 2-31