Examples of Determining Accuracy
Ex. 1: Find the accuracy when R=33k<2, f=lOkHz, IV, while Q<O.l.
Find the accuracy from Table A-l, using the following parameters:
IV, 1OkHz and 20k to 200kR.
When operating within a temperature range from 5 to 4O”C, add
the value in Table A-4.
When accuracy is needed for 21Mn or a2n, interpolate the value
according to Note 3.
Add fl/2 count of display value. When the display shows a measured value of 33.14kR, the l/2 count becomes 0.005m.
Ex. 2: Find the accuracy when C = lOpF, f=lkHz, 50mV, while D < 0.1.
1.
Find I Z I from Figure A-l Conversion Diagram.
l Find the line descending from C = 1OpF. Find the vertical line
from frequency = lkHz. Mark their intersection.
l Extend a horizontal line from the intersection, to the left side.
Read the value of I Z I (=16@. Also, you can calculate the accuracy using the following equation.
IZI = 11/27EfCI
Find the accuracy from Table A-l, using the following parameters:
50mV, 1kHz and 10 to 2m.
When operating within a temperature range from 5 to 40°C, add
the value in Table A-4.
When accuracy is needed for ZlMn or <2!& interpolate the value
according to Note 3.
Add *l/2 count of display value.
Ex. 3: Find the accuracy when L = 680pH, f=lOOkHz, while Q z 10.
1. Find I Z I from Figure A-l Conversion Diagram.
l Draw a straight line from L = 68OpH, in parallel with the ascend-
ing lines. Find the intersection with the vertical line at frequency
= 1ookHz.
l Read I Z I as shown in Ex. 2. Also, you can calculate the accuracy
using the following equation:
IZI = 12RfLI
2. Find the accuracy from Table A-l, using the following parameters:
f=lOOkHz and 10 to 2m. Repeat procedures 3 to 5 in Ex. 2.
Ex. 4: Find the accuracy of IZI at any 8 and for parameters other
than 8.
1.
Measure IZI and 8, or calculate the accuracy, using the other
parameters.
Q =1/D
I8 I
= I arctanQ I
= 2xfLsJESR
izi = l27adsineI
= 1/ (2rrfCs ESR) = I 1 / (271fCs sin 81
= 2n;fCp I G
= I 1/ (2lcfCp sin 81
= 1/(27rfLp G)
= l27cfLp/sin 81
f: Frequency (Hz)
Suffix s: Series equivalent circuit
p: Parallel equivalent circuit
2. Find the accuracies of I Z I and 8. Refer to Ex. 1.
3. Find the maximums and minimums of I Z I and 8 from the mea-
sured values and accuracies of I Z I and 8.
Z max, min = Measured value I Z I x [l i Accuracy of I Z I (%) / 1001
8 max, min = Measured value 8 + Accuracy 8 (degree)
4. Find the maximums and minimums of the parameters for the four
sets of combinations of maximums and minimums of I Z I and 8,
using the calculating equation of each parameter. B is a suscep-
tance, i.e., an imaginary component of admittance.
ESR = IZI cose G
=(i/izi)c0se
X
= IZI sine
B
=-(l/ lZI)sin8
Ls =XIZnf
LP
=-l/27&%
cs =-l/ZafX
CP
= B/&f
Q = lsin~l /cosO
D
=c0se/ Isinel
5. The accuracy is the value that the error of l/2 count of display is
added to I maximum value-measured value I or I minimum value-
measured value I, whichever is greater.
A.2 MEASURING SIGNAL
Frequency
Range: 120, lk, lOk, 100k (Hz)
Accuracy: 1tO.O05% (*50ppm)
Signal level (HCUR open voltage with terminal)
1Vrms:
*3X at 1kHz
*4% at 12OHz to 1OkHz
f5% at 1OOkHz
50mVrms: &5t5x at lkHz
*6”/0 at 12OHz to 1OkHz
*7% at 1OOkHz
DC bias
Internal: 2V, *5%
External: 0 to ~t35V
A.3 MEASURING RANGE
Number of ranges: 6 (Reference resistance: 1004 lw2, lOka, 5Ok(l,
upper and lower extension ranges 2)
Selection: Automatic
A.4 MEASURING SPEED (reference value)
Measuring time (fixed range and auto trigger mode)
When the range is not switched, the following values become
effective:
15oms (typ) lkHz, lksz
600ms (max) all ranges, all frequencies
Automatic range switching time (per range)
The automatic range switching time is nearly equal to the measuring time. When the frequency is $lZOHz and the impedance is
>lMB, it will take time for the measured value to stabilize. When
measuring a device whose impedance changes according to the
magnitude of the measuring signal, time will extend until the value
of the device becomes stable.
Level switching stabilization time: 200ms to 4s
The level switching stabilization time will change according to the
kinds of devices under test. Time increases when measuring nonlinear elements, such as diodes, or when switching from 1V to
50mV. This is the time required for the stabilization of measured
values. The time needed to change the device under test is
excluded.
Bias stabilization time: (4 + 0.015C)s
Where C=capadtance of device under test (I.IF).
Frequency switching stabilization time: 150ms to 4s
The frequency switching stabilization time increases when a high
frequency is changed to a low frequency (e.g.: 1OOkHz to 120H.z)
Also, time changes according to the device under test. This is the
time required for the stabilization of the measured value. The time
taken to change the device under test is excluded.