Dc Current Accuracy - Keithley 2290-10 User Manual

Section 8: Performance verification
Table: DC voltage accuracy
Output voltage
(volts)
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
6000
7000
8000
9000
10000

DC current accuracy

The DC current accuracy test measures the accuracy of the output current limit and the µA (current)
display.
1. Using the ohms function of the multimeter, measure and record the value of the 990 Ω resistor.
2. With the power off, connect the 990 Ω resistor, the 1 MΩ load resistor, and the multimeter to the
Model 2290-10 HIGH VOLTAGE output connector, as shown in the next figure. Note that the
multimeter is connected across the 990 Ω resistor.
Turn off high voltage and allow ample time for the voltage to discharge before changing any
connections.
For safety purposes, the resistors must be mounted within a safety shield connected to
safety earth ground using #18 AWG or larger wire. Be sure to connect the 990
the low (chassis side) of the Model 2290-10 output. Otherwise, the multimeter will be floated
5 kV above earth ground, which could result in instrument damage or risk of electric shock.
8-4
Voltage display limits
(volts)
492
992
1492
1992
2492
2992
3492
3992
4492
4992
5992
6992
7992
8992
9992
Figure 16: Model 2290-10 Connections for DC current accuracy tests
Model 2290-10 10 kV Power Supply User's Manual
Multimeter reading limits
(volts)
508 494.0
1008 994.0
1508 1494.0
2008 1994.0
2508 2494.0
3008 2994.0
3508 3494.0
4008 3994.0
4508 4494.0
5008 4994.0
6008 5994.0
7008 6994.0
8008 7994.0
9008 8994.0
10008 9994.0
506.0
1006.0
1506.0
2006.0
2506.0
3006.0
3506.0
4006.0
4506.0
5006.0
6006.0
7006.0
8006.0
9006.0
10006.0
Ω
2290-10-900-01 Rev. A/December 2013
resistor to