Model 2290-10 10 kV Power Supply User's Manual
Section 8: Performance verification
2290-10-900-01 Rev. A/December 2013
8-5
3. Turn on the power, and recall the Model 2290-10 default conditions. (Press
RCL
,
0
, and then
ENTER
.)
4. Select the multimeter DCV function, and enable autoranging.
5. With the high voltage off, allow the multimeter reading to settle and then enable REL to null any
residual offset voltage.
6. Set the Model 2290-10 output voltage to 5000V, and set the current limit to 1 μA. Turn the high
voltage on.
7. Note the DMM reading, and then calculate the current as follows: I = V/R, where V is the
multimeter voltage reading, and R is the actual value of the 990 Ω resistor measured in step 1.
8. Verify that the current computed in step 7 is within ±5 μA of the programmed current limit value.
Also, make sure that the front panel μA display reading is within ±2 μA of the actual current value.
9. Repeat steps 6 through 8 for the remaining currents listed in the next table. For each value:
•
Program the current limit to the correct value.
•
Measure and record the multimeter voltage reading.
•
Compute the current from the voltage and resistance.
•
Verify the computed and display current values are within required limits.
10. Turn off the high voltage, and allow the voltage to discharge.
Table: DC current accuracy summary
Current limit
setting
Multimeter voltage
1
Calculated current
2
Allowable current range
3
Lower limit Upper limit
100 µA
V
µA
95
105
200 µA
V
µA
195
205
300 µA
V
µA
295
305
400 µA
V
µA
395
405
500 µA
V
µA
495
505
600 µA
V
µA
595
605
700 µA
V
µA
695
705
800 µA
V
µA
795
805
900 µA
V
µA
895
905
1000 µA
V
µA
995
1005
1
Voltage across 990 Ω resistor measured by multimeter.
2
Calculated as follows: I = V/R, where V= multimeter voltage reading and R= measured resistor
value.
3
Limits calculated as follows: I ± 5 μA, where I = calculated current.