5560A/5550A/5540A
Service Manual
54
To calibrate the Capacitance function for values <1 mF:
1. Remove the Guard Ground strap on the Product.
2. Set the LCR meter for Cp Mode, Level 1V, Freq 1 kHz, Speed Slow.
3. Complete the OPEN/SHORT compensation of the LCR meter and lead set for two-wire
measurement that includes the Y adapter and single banana plugs. Do not connect a strap
between the Guard and Ground terminals of the DUT for this function.
4. Connect the LCR meter to the Product for two wire capacitance measurements.
5. From step 1, Table 18, set the LCR meter for the recommended frequency (the Product can be
verified at frequencies other than specified, but the measured output varies within the specifications
as a function of the frequency).
6. Select appropriate mode (Cp or Cs).
7. Output from the Product. Measure with the LCR meter and record in Table 18.
Table 18. Calibration Steps for Capacitance with LCR Meter
Step Product Range Product Output Test Frequency Calculated Product Output Limits
1 1.2 nF 0.2 nF 1000 Hz ±2.2 pF
2 1.2 nF 1 nF 1000 Hz ±3.1 pF
3 12 nF 1.21 nF 1000 Hz ±6.3 pF
4 12 nF 10 nF 1000 Hz ±16 pF
5 120 nF 12.1 nF 610 Hz ±45 pF
6 120 nF 20 nF 610 Hz ±54 pF
7 120 nF 30 nF 610 Hz ±66 pF
8 120 nF 50 nF 610 Hz ±90 pF
9 120 nF 100 nF 610 Hz ±150 pF
10 120 nF 120 nF 610 Hz ±174 pF
11 1.2 µF 0.121 µF 100 Hz ±445 pF
12 1.2 µF 1 µF 100 Hz ±1.50 nF
13 12 µF 1.21 µF 80 Hz ±4.45 nF
14 12 µF 10 µF 80 Hz ±15.0 nF
15 120 µF 12.1 µF 20 Hz ±41 nF
16 120 µF 100 µF 20 Hz ±155 nF
17 1.2 mF 0.121 mF 5 Hz ±516 nF
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