To Next Page

To Previous Page

Performance Verification 18-19

7. Verify charge measurement accuracy for each of the values listed in Table 18-7. For each

test point:

• Select the correct Model 6514 measurement range.

• Make connections to the correct standard capacitor.

• Calculate the required voltage from the desired charge and actual standard capaci-

tance value: V = Q/C.

• Disable zero check.

• Set the calibrator voltage to the calculated value.

•Verify that Model 6514 charge reading is within the required limits.

• Enable zero check to discharge the capacitor.

Table 18-7

Coulombs measurement accuracy reading limits

Model

6514 range

Nominal

calibrator

voltage

Standard

capacitor

Applied charge

Actual

voltage

Model 6514 coulombs reading

limits (1 Year, 18˚C-28˚C)

20nC 20V 1nF 20.0000nC _______V 19.9915 to 20.0805nC

200nC 200V 1nF 200.000nC _______V 199.195 to 200.805nC

2µC 20V 100nF 2.00000µC _______V 1.97995 to 202.02005µC

20µC 200V 100nF 20.0000µC _______V 19.7995 to 20.2005µC

Nominal values.

Calculate actual voltage from applied charge and actual capacitance value: V = Q/C.

Keithley 6514 User Manual

Other manuals for Keithley 6514