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Calibration and Verification
Verification
3
3-57
3.
Allow the Calibrator Mainframe reading to stabilize, then record the Calibrator
Mainframe resistance reading for each nominal value listed in Table 3-26. Compare
the Calibrator Mainframe resistance readings to the actual resistance values and the
tolerance column of Table 3-26.
Table 3-26. MeasZ Resistance Verification
Calibrator
Mainframe
MeasZ
Range
Nominal
Resistance
Value
Calibrator
Mainframe
Resistance
Reading
Actual
Resistance
Value
Tolerance
res 50
Ω
40
Ω
0.04
Ω
res 50
Ω
50
Ω
0.05
Ω
res 50
Ω
60
Ω
0.06
Ω
res 1 M
Ω
600 k
Ω
600
Ω
res 1 M
Ω
1 M
Ω
1 k
Ω
res 1 M
Ω
1.5 M
Ω
1.5 k
Ω
3-59. 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 N to BNC cable supplied with the Scope Calibrator. 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:
•
Adapters and capacitors to achieve 5 pF, 29 pF, 49 pF nominal values at the end of
BNC(f) connector
•
N to BNC cable supplied with the Scope Calibrator
Set the Calibrator Mainframe to the MeasZ menu. Follow these steps to verify the
MeasZ capacitance function.
1.
Set the Calibrator Mainframe MeasZ capacitance range to cap. (The blue softkey
under MEASURE toggles the MeasZ ranges).
2.
Connect the N to BNC cable to the Calibrator Mainframe CHAN 1 connector, but do
not connect any thing to the end of this cable.
3.
Allow the Calibrator Mainframe reading to stabilize, then press the SET OFFSET
blue softkey to zero the capacitance reading.
4.
Connect the end of the N to BNC cable to the BNC(f) connector attached to the
nominal capacitor values indicated in Table 3-27.
5.
Allow the Calibrator Mainframe reading to stabilize, then record the Calibrator
Mainframe capacitance reading for each nominal value listed in Table 3-27.
Compare the Calibrator Mainframe capacitance readings to the actual capacitance
values and the tolerance column of Table 3-30.
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