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Performance Verification
Model 2520 Pulsed Laser Diode Test System Service Manual
Current measurement accuracy
Follow the steps below to verify that Model 2520 detector current measurement accuracy
is within specified limits. This test involves applying currents and verifying that
Model 2520 current readings are within required limits.
1. With the power off, connect the 2k
Ω
resistor and DMM to the testhead
DETECTOR 1 jack, as shown in
for
parallel resistor construction.)
2. Turn on the Model 2520 and DMM, and allow them to warm up for a minimum of
one hour.
3. Select the DMM DC volts function, and enable auto-range.
Figure 1-7
Connections for DETECTOR 1 current measurement verification tests
NEXT
PREV
POWER
DISPLAY
2001
MULTIMETER
DCV
ACV
DCI
ACI
Ω
2
Ω
4
FREQ
TEMP
REL
TRIG
INFO
LOCAL
EXIT
ENTER
RANGE
RANGE
!
F
R
500V
PEAK
FRONT/REAR
2A 250V
AMPS
CAL
STORE RECALL
CHAN
SCAN
FILTER MATH
CONFIG MENU
HI
INPUT
LO
SENSE
Ω
4 WIRE
INPUTS
350V
PEAK
1100V
PEAK
AUTO
CURRENT
OUTPUT
VOLTAGE
SENSE
CAT I
DETECTOR 1
DETECTOR 2
BIAS
CURRENT
INPUT
ISOLATION FROM EARTH: 10V MAX.
HI
HI
LO
LO
!
!
Model 2520 Testhead
Model 2001 DMM
Input HI
Input LO
Inner
Shield
Center
Conductor
DETECTOR 1
Resistor
(See Text)
4. Restore front panel (BENCH) defaults as outlined previously in
5. Press the DETECTOR 1 I
PD
key, then select the Model 2520 10mA range with the
RANGE key.
6. Press the DETECTOR 1 VB key, then press the EDIT key, and set the voltage bias
source value to +20.000V.
7. Turn on the Model 2520 outputs by pressing the ON/OFF OUTPUT key.
8. Press the TRIG key. Note the DMM voltage reading, then turn off the outputs by
pressing the ON/OFF OUTPUT key.
9. Calculate the current from the DMM voltage reading and characterized resistance
value: I = V/R.
10. Calculate reading limits based on the current and Model 2520 specifications, then
verify that the Model 2520 DETECTOR 1 current reading is within the limits.
11. Repeat steps 5 through 10 for the 20mA, 50mA, and 100mA ranges. Be sure to use
the correct test resistor for each range.
Summary of Contents for 2520
Page 10: ......
Page 13: ...1 PerformanceVerification...
Page 30: ......
Page 31: ...2 Calibration...
Page 68: ...2 38 Calibration Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 69: ...3 RoutineMaintenance...
Page 72: ...3 4 Routine Maintenance Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 73: ...4 Troubleshooting...
Page 90: ...4 18 Troubleshooting Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 91: ...5 Disassembly...
Page 98: ...5 8 Disassembly Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 99: ...6 ReplaceableParts...
Page 116: ...6 18 Replaceable Parts Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 117: ...A Specifications...
Page 121: ...B CalibrationReference...
Page 132: ...B 12 Calibration Reference Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 136: ......