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4285A Datasheet (HTML) - Agilent(Hewlett-Packard)

Part No. 4285A
Description  Precision LCR Meter
Download  16 Pages
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Maker  HP [Agilent(Hewlett-Packard)]
Homepage  http://www.home.agilent.com
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 11 page
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11
7. From Table 1-1, the actual accuracy equation to
be applied is determined as A1.
Then,
8. Determine N1 from Table 1-2.
From frequency = 25.2 MHz, then, N1 = 0.3.
9. Then,
10. Cable length is 0 m, then Ac = 0.
11. Operating temperature is 28 °C, then Kt = 1
(from Figure 1-5).
12. Therefore, inductance measurement accuracy
Ae is:
Ae = ±(An + Ac)
Kt
= ±(2.6 + 0)
1
= ±2.6 [%]
Determine Q measurement accuracy Qe
1. From Q Accuracy (see page 6), Q measurement
accuracy Qe is determined as below:
Qe = ±
Qx
2
De
1
Qx
De
2. Determine D accuracy De for calculating Qe.
From the previous step Determine inductance
measurement accuracy Ae (see page 10), Ae is
2.6 [%], then:
De = ±
Ae
100
= ± 0.026
3. Therefore Qe is:
Qe = ±
Qx
2
De
1
Qx
De
Qe = ±
302
0.026
1
30
0.026
≈ +106/–13
Correction Functions
Zero open
Eliminates measurement errors due to parasitic
stray admittance (C, G) of the test fixture.
Zero short
Eliminates measurement errors due to parasitic
residual impedances (L, R) of the test fixture.
Load
Improves the measurement accuracy by using a
device whose value is accurately known (a working
standard) as a reference.
List Sweep
A maximum of ten frequencies or test signal levels
can be programmed. Single or sequential tests can
be performed. When Option 4285A-001 is installed,
DC bias voltages can also be programmed.
Comparator Function
Ten-bin sorting for the primary measurement
parameter, and IN/OUT decision output for the
secondary measurement parameter.
Sorting modes
Sequential mode. Sorting into unnested bins with
absolute upper and lower limits.
Tolerance mode. Sorting into nested bins with
absolute or percent limits.
Bin count
0 to 999999
List sweep comparator
HIGH/IN/LOW decision output for each point in
the list sweep table.
An = 0.3% + (
≈ 2.6 [%]
)
2 . 3% +
[0.02% +
() . 0.1%] . 1 . 1
25.2
30
25.2
30
50
|35|
A1 =N1% + ( )
2 . 3% +
[0.02% +
() . 0.1%] . K
i
. K
osc
f
30
f
30
50
|Zm|



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