Calibrator
Calibration Verification of the Product
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8. When completed, disconnect the current setup.
The Product can source capacitance values larger than what most RCL meters can measure. To do
capacitance verification on outputs >120 µF, a dc current from a precision current source and a high-
speed sampling digital multimeter is necessary.
Capacitance is the product of an applied current and the ratio of the charge time to the charge voltage.
A measurement procedure for capacitance is to apply a known current across the capacitor and then
measure the voltage change for a known time interval. Fluke Calibration recommended to implement
the following in computer-controlled routine for consistency of results and timely sequence execution.
To proceed with this calibration:
9. Connect the precision current source, the sampling DMM (8588A) and the Product as shown in
Figure 28.
10. Set the 8588A as follows:
• Reset meter
• Set Initiate Layer to Continuous OFF
• Volts dc
• Range 1 V (10 V for C
≥1.21 mF)
• Aperture 1 ms
• Coupling dc
• Filter ON 100 kHz
• Turn Calculate Statistics to ON
• Select TRIG SETUP and set the Trigger Layer parameters:
Trigger Event Timer
Trigger Timer 5 s
Trigger Count 2
Trigger Delay: 0 s
Delay 0
11. Set the Product to output the first point of Table 19. Set to Operate.
12. Set the current source calibrate to the DC current value in the table for each step.
13. Set to Operate and as soon as the stable LED for the current source is on, trigger the meter.
14. After the meter acquires the data (in 5 seconds), set the current source to STBY.
15. Retrieve the MIN and MAX readings from the meter acquired statistics system. Calculate (MAX -
MIN) and record in Table 19 in the DMM Measurement column.
16. Continue with these steps and use the same routine. The meter setup does not have to be set
again except for the statistics system. Clear the statistics between each step.
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