Agilent Technologies 4285A Manual do Utilizador descarregar pdf (Página 7)

7

R

p

accuracy

Rp accuracy Rpe is given as

R

px

 D

e

R

pe

= ±

D

x

 D

e

[Ω]

where:

R

px

= Measured Rp value [Ω]

D

x

= Measured D value

D

e

= D accuracy

R

p

accuracy applies when D

x

(measured D value) ≤ 0.1.

R

s

accuracy

R

s

accuracy R

se

is given as

where:

X

x

= Measured X value [Ω]

C

x

= Measured C value [F]

L

x

= Measured L value [H]

D

e

= D accuracy

f = Test frequency [Hz]

R

s

accuracy applies when D

x

(measured D value) ≤ 0.1.

Basic accuracy equations

The basic accuracy A

n

is calculated from the

following procedure:

1. Determine A

n

equation from Figure 1-3 or

Figure 1-4. In both charts, boundary line belongs

to the better accuracy area.

When the oscillator level is ≤ 1 V

rms

, determine A

n

to be applied, value of K

i

and value of K

osc

from the

Figure 1-3. If the determined K

osc

≤ 1, then round

up K

osc

to 1.

When the oscillator level is > 1 V

rms

, determine A

n

to be applied and value of K

i

from the Figure 1-4.

2. Calculate A

n

from the formula to be applied. The

n accuracy factor included in the A

n

equation is

shown in Table 1-2. Use K

i

and K

osc

factors deter-

mined in previous step.

Table 1-1. A

n

equations

|Z

m

|: Absolute value of measured impedance in [Ω]

f

m

: Test frequency in [MHz]

N accuracy factors

N

1

and N

2

in the A

n

equations have the following

values:

Table 1-2. N accuracy factors

Frequency(f) N

1

N

2

75 kHz ≤ f ≤ 200 kHz 0.15 0.15

200 kHz < f ≤ 3 MHz 0.08 0.15

3 MHz < f ≤ 5 MHz .15 0.38

5 MHz < f ≤ 30 MHz 0.30 0.38

A

1

= N

1

% + ( )

2

.

3% + [0.02% + ()

.

0.1%]

.

K

i

.

K

osc

f

m

30

f

m

30

50

|Z

m

|

A

9

= N

2

% + ( )

2

.

3% + [0.02% + ()

.

0.1%]

.

K

i

f

m

30

f

m

30

100

|Z

m

|

A

2

= N

1

% + ( )

2

.

3% + [0.02% + ()

.

0.05%]

.

K

i

.

K

osc

f

m

30

f

m

30

|Z

m

|

50

A

10

= N

2

% + ( )

2

.

3% + [0.02% + ()

.

0.05%]

.

K

i

f

m

30

f

m

30

|Z

m

|

100

A

11

= 0.18% + ( )

2

.

0.1% + [0.02% + ()

.

0.05%]

.

K

i

f

m

5

f

m

30

|Z

m

|

1 k

A

12

= 0.3% + ( )

2

.

3% + [0.05% + ()

.

0.1%]

.

K

i

f

m

30

f

m

30

|Z

m

|

1 k

A

14

= 0.18% + ( )

2

.

3% + [0.02% + ()

.

0.03%]

.

K

i

f

m

30

f

m

10

|Z

m

|

10 k

A

13

= 0.18% +

.

0.02%

.

K

i

|Z

m

|

10 k

A

16

= 0.18% +

.

0.03%

.

K

i

|Z

m

|

100 k

A

6

= 0.18% + ( )

2

.

3% + [0.02% + ()

.

0.03%]

.

K

i

.

K

osc

f

m

30

f

m

10

|Z

m

|

5 k

A

15

= 0.5% + ( )

2

.

3% + ()

.

0.2%]

.

K

i

f

m

30

f

m

30

|Z

m

|

10 k

.

A

7

= 0.5% + ( )

2

.

3% + ()

.

0.2%

.

K

i

.

K

osc

.

f

m

30

f

m

30

|Z

m

|

5 k

A

8

= 0.18% +

.

0.03%

.

K

i

.

K

osc

|Z

m

|

50 k

A

3

= N

1

% + ( )

2

.

0.1% + [0.02% + ()

.

0.05%]

.

K

i

.

K

osc

f

m

5

f

m

30

|Z

m

|

500

A

4

= 0.3% + ( )

2

.

3% + [0.05% + ()

.

0.1%]

.

K

i

.

K

osc

f

m

30

f

m

30

|Z

m

|

500

A

5

= 0.18% +

.

0.02%

.

K

i

.

K

osc

|Z

m

|

5 k

R

se

= ±

X

x

 D

e

[Ω]

(

X

x

=2 πfL

x

=

1

2 πfC

x

)

SgLabs

www.sglabs.it

email: [email protected]

tel. +39 0755149360

SgLabs

www.sglabs.it

email: [email protected]

tel. +39 0755149360

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