Keithley 2520 Service Manual page 47

Model 2520 Pulsed Laser Diode Test System Service Manual
9.
10.
11.
12.
13.
14.
15.
16.
Figure 2-6
Detector 2 voltage bias source calibration connections
Model 2001 DMM
Ω2 Ω4
PREV DCV ACV DCI ACI
DISPLAY
NEXT
REL TRIG STORE RECALL FILTER MATH
POWER
INFO LOCAL CHAN SCAN CONFIG MENU
Press ENTER. The unit will prompt for the 0V calibration point:
Vbias 1 CAL
Press ENTER to Output +00.000 V
Press ENTER. The instrument will display the following message:
DMM RDG: +00.00000 V
Use , , , , ENTER or EXIT.
Note the DMM voltage reading, then use the EDIT keys to adjust the Model 2520
display value to agree with the reading.
Press ENTER. The unit will display the prompt for the +20V calibration point:
Vbias 1 CAL
Press ENTER to Output +20.000 V
Press ENTER. The instrument will display the following message:
DMM RDG: +20.00000 V
Use , , , , ENTER or EXIT.
Note the DMM voltage reading, then use the EDIT keys to adjust the Model 2520
display value to agree with the reading, and press ENTER.
Press EXIT to return to normal display.
Repeat steps 4 through 15 for the DETECTOR 2 bias voltage source. Make your
connections to the testhead DETECTOR 2 jack
calibration.
Input HI
SENSE
INPUT
Ω 4 WIRE
HI
350V 1100V
!
PEAK PEAK
2001 MULTIMETER
LO
500V
PEAK
INPUTS
FREQ TEMP
RANGE F R
AUTO
FRONT/REAR
2A 250V
AMPS
RANGE
CAL
EXIT ENTER
Model 2520 Testhead
Triax Cable
Inner Shield
BIAS
Input LO
DETECTOR 1
ISOLATION FROM EARTH: 10V MAX.
DETECTOR 2
Calibration
(Figure 2-6), and select Vb2 for
HI LO
CURRENT
OUTPUT
CURRENT
INPUT
!
CAT I
DETECTOR 2
!
VOLTAGE
SENSE
HI LO
VOLTAGE
SENSE HI
2-17