Measz Capacitance Verification - Fluke 5500A Service Manual

5500A
Service Manual
2. Using the BNC cable, connect the SCOPE connector to the BNC(f) connector
3. Allow the Calibrator Mainframe reading to stabilize, then record the Calibrator
Calibrator
Mainframe
MeasZ
Range
res 50Ω
res 50Ω
res 50Ω
res 1MΩ
res 1MΩ
res 1MΩ

6-72. MeasZ Capacitance Verification

The MeasZ capacitance function is verified by measuring capacitors of known values.
The measurement value is then compared to the capacitor actual value.
The capacitors must make a solid connection to a BNC(f) to enable a connection to the
end of the BNC cable supplied with the SC600. Due to the small capacitance values, care
must be taken to know the actual capacitance at this BNC(f) connector. The capacitance
values must be determined at a 10 MHz oscillator frequency. Fluke uses an HP 4192A
Impedance Analyzer at 10 MHz to determine the actual capacitance values.
This procedure uses the following equipment:
•
•
Refer to Figure 6-17 for the proper setup connections.
Set the Calibrator Mainframe to SCOPE mode, with the MeasZ menu on the display.
Then follow these steps to verify the MeasZ capacitance function.
1. Set the Calibrator Mainframe MeasZ capacitance range to cap. (The blue softkey
2. Connect the BNC cable to the Calibrator Mainframe SCOPE connector, but do not
3. Allow the Calibrator Mainframe reading to stabilize, then press the SET OFFSET
4. Connect the end of the BNC cable to the BNC(f) connector attached to the nominal
6-58
attached to the nominal resistance values indicated in Table 6-45. The 600 KΩ
nominal value can be achieved by connecting the 1.5 MΩ and 1 MΩ resistors in
parallel.
Mainframe resistance reading for each nominal value listed in Table 6-45. Compare
the Calibrator Mainframe resistance readings to the actual resistance values and the
tolerance column of Table 6-45.
Table 6-45. MeasZ Resistance Verification
Nominal
Resistance
Value
40 Ω
50 Ω
60 Ω
600 kΩ
1 MΩ
1.5 MΩ
Adapters and capacitors to achieve 5 pF, 29 pF, 49 pF nominal values at the end of
BNC(f) connector
BNC cable supplied with the SC600
under MEASURE toggles the MeasZ ranges).
connect any thing to the end of this cable.
blue softkey to zero the capacitance reading.
capacitor values indicated in Table 6-46.
Calibrator Actual
Mainframe Resistance
Resistance Value
Reading
Tolerance
0.04 Ω
0.05 Ω
0.06 Ω
600 Ω
1 kΩ
1.5 kΩ