Accuracy When Holding A Nonoptimal Range - Protek 9216A User Manual

Table 2-6 Extreme Range Error Terms for Capacitances (C + R mode), K
measurement is given by
where A
c
For D > 0.1, the impedance accuracy must first be calculated. To do this, first calcu-
late the impedance of the DUT by adding the resistive and capacitive elements, either in
series or parallel, as appropriate. Use the impedance accuracy graph to obtain imped-
ance accuracy, and let it be denoted A
the impedance accuracy as follows:

Accuracy When Holding a Nonoptimal Range

When a component is measured outside of its nominal range (in range hold), the accura-
cy of the measurement is reduced. The nominal ranges are defined as approximately
four times above and below the nominal impedance value:
(R0 is not defined for 100 kHz.) Components that are measured while autoranging have
only one set of extreme range terms (K
For components measured in the range hold mode, the values of K
ent for each range. These values are calculated from parameters tabulated below in
Tables 2-7 to 2-9 for resistive, inductive, and capacitive measurements, respectively.
Frequency
100 Hz, 120 Hz
1 kHz
10 kHz
100 kHz
Accuracy of R in % [A
is the accuracy of the capacitance measurement (above) and
D  R/2 f C.
Accuracy of C in % [A
Accuracy of R in % [A
Range
R3
R2
R1
R0 (100 Hz to 10 kHz)
K
l
(2 pF/C ) (C /2000 mF)
m m
(0.1 pF/C ) (C /200 mF)
m m
(0.01 pF/C ) (C
m m
/100 F)
(0.01 pF/C )
(C
m
m
 (1 + 1/D)]
c
. The accuracies of C and R are calculated from
z
 (1 + |D|)]
z
 (1 + 1/|D|)]
z
Nominal Impedance Range
6.25  to 100 
100  to 1.6 k
1.6 k to 25.6 k
25.6 k to 400 k
, K ) per frequency.
h l
13
and K
h
K
h
/10 mF)
and K
h
l
(4)
(5)
(6)
(7)
are differ-
l