Switching The Equivalent Measurement Circuitry - Hameg HM8118 Manual

F i r s t - t i m e o p e r a t i o n
Measurement Source
range Impedance
1 25.0 Ω
2 25.0 Ω
3 400.0 Ω
4 6.4 kΩ
5 100.0 kΩ
6 100.0 kΩ
As the impedance of capacitors is inversely proportional to fre-
quency larger capacitances are measured in the lower impedance
ranges. Hence the proper range may change if the frequency
changes.
In case that several similar components have to be measured
in turn, the measurement time can be shortened, if the first
component is measured with autoranging on. The button AUTO/
17
HOLD should be pressed to change from automatic range
mode to manual range mode and hold it. The button AUTO/HOLD
will extinguish.
In order to prevent measurement errors due to false operation
and uncertainties, it is advisable to always use automatic range
selection. Manual range selection should preferably be used if
highest precision is desired. In order to uprange press UP
order to downrange press DOWN
4.8 Switching the equivalent measurement
circuitry
If automatic selection of measurement circuitry is enabled
(by pressing the AUTO 14 button) the HM8118 automatically
selects the resp. equivalent circuit (serial or parallel), which
provides the most precise measurement depending on the
connected component (ref. also to chap. 4.7). The measure-
ment circuit can also be selected manually (by pressing the
SER button 15 for serial mode or by pressing the PAR button
16 for parallel mode).
The SER/PAR mode represents the equivalent circuit of the mea-
suring circuit. Traditionally, the inductance of coils is measured
in a series circuit (serial); however there are cases where a
parallel circuit will yield a better representation of the compo-
nents. The core of coils with an iron or ferrite core for example
may contribute most of the losses. A series circuit should be
prefered if most of the losses are resistive, or they occur within
the connection wires of wired components.
In automatic mode the instrument selects the serial equivalent
circuitry for impedances below 1 kΩ and the parallel equivalent
circuitry for impedances above 1 kΩ.
42
Subject to change without notice
Impedance of the
component
10.0 µΩ — 3.0 Ω
3.0 Ω — 100.0 Ω
100.0 Ω — 1.6 kΩ
1.6 kΩ — 25.0 kΩ
25.0 kΩ — 2.0 MΩ
2.0 MΩ — 100.0 MΩ
18
, in
19
.
Measurement time: SLOW
Display
Measurement modes: Auto, L-Q, L-R, C-D, C-R, R-Q, Z-Θ, Y-Θ,
R-X, G-B, N-Θ, M
Equivalent circuits: Auto, Series or Parallel
Parameters displayed: Value, Deviation or % Deviation
200 kHz LCR-Messbrücke HM8118
Averaging: 2...99 measurements
Alle Angaben bei 23 °C nach einer Aufwärmzeit von 30 Minuten.
Example to determine the accuracy
Accuracy
of the HM8118
Primary Parameters:
Basic accuracy
(Test voltage: 1.0 V,
Bedingungen
measurement SLOW/MEDIUM,
Testsignalspannung: 1 V
autoranging mode, constant voltage OFF,
Leerlauf- und Kurzschlussabgleich durchgeführt
The accuracy calculation is based on the accuracy table of
bias off). For FAST mode double the basic
Messzeit: SLOW
the data sheet:
accuracy values
Anzeige
Impedance: 100 MΩ
Messbare Kenngrößen: Auto, L-Q, L-R, C-D, C-R, R-Q, Z-Θ, Y-Θ,
0.2% + |Z|/1.5GΩ
R-X, G-B, N-Θ, M
4 MΩ
Schaltungsart: Auto, Seriell oder Parallel
1 MΩ
Angezeigte Parameter:
Wert, absolute Abweichung oder prozen-
tuale Abweichung %
Mittelwertbildung: 2...99 Messungen
0.05% +
|Z|/2GΩ
Genauigkeit
25 kΩ
Primärparameter: Grundgenauigkeit (Testspannung: 1,0 V,
Messmodus SLOW/MEDIUM,
Messbereichsautomatik AUTO,
Konstantspannung OFF, Vorspannung
200 kHz LCR-Bridge HM8118
AUS). Für hohe Messgeschwindigkeit
100 Ω
All data valid at 23 °C after 30 minutes warm-up.
FAST gelten die doppelten Werte der
0.1% + 1mΩ/|Z|
Impedanz: 100MΩ
Conditions
0,2% + |Z|/1,5GΩ
2.5 Ω
4MΩ
Test signal voltage: 1 V
Open and short corrections performed
1MΩ
Measurement time: SLOW
0.3% + 1mΩ/|Z|
Display
0.01mΩ
0,05% +
Measurement modes: Auto, L-Q, L-R, C-D, C-R, R-Q, Z-Θ, Y-Θ,
|Z|/2GΩ
20Hz
R-X, G-B, N-Θ, M
25kΩ
Secondary Parameters:
Equivalent circuits: Auto, Series or Parallel
To calculate the appropriate accuracy, the following parame-
Basic accuracy D, Q: ±0.0001 @ f = 1 kHz
Parameters displayed: Value, Deviation or % Deviation
ters of the component are required: Phase angle: ±0.005° @ f = 1 kHz
Averaging: 2...99 measurements
– component impedance at the appropriate frequency
Ranges
Accuracy 100Ω
– the measurement frequency itself.
|Z|, R, X: 0.01 mΩ...100 MΩ
Primary Parameters: Basic accuracy
|Y|, G, B: 10 nS...1,000 S
(Test voltage: 1.0 V,
C:
Measuring of a 10 pF capacitor with an impedance of 0.01 pF...100 mF
0,1% + 1mΩ/|Z|
measurement SLOW/MEDIUM,
L: 10 nH...100 kH
15 MΩ at 1 kHz
autoranging mode, constant voltage OFF,
D: 0.0001...9.9999
2,5Ω
bias off). For FAST mode double the basic
Q: 0.1...9,999.9
accuracy values
In this case, the first line of the accuracy table is valid:
-180...+180°
Θ:
∆:
-999.99...999.99 %
0,3% + 1mΩ/|Z|
M: Impedance: 100MΩ 1 µH...100 H
N: 0.95...500
0.2% + |Z|/1.5GΩ
0,01mΩ
4MΩ
20Hz
1MΩ
The values of the component set in into the formula:
Sekundärparameter:
15 MΩ
Grundgenauigkeit D, Q ±0,0001 bei f = 1 kHz
accuracy = 0,2% + 0.05% +
@1kHz
Phasenwinkel ±0,005° bei f = 1 kHz
1,5 GΩ
|Z|/2GΩ
25kΩ
Messbereiche
calculated / set in:
|Z|, R, X: 0,01 mΩ...100 MΩ
|Y|, G, B: 10 nS...1.000 S
15 x 10 6 Ω
accuracy = 0,2% +
C: 0,01 pF...100 mF
@1kHz
1,5 x 10 9 Ω
L: 10 nH...100 kH
100Ω
D: 0,0001...9,9999
15 Ω
Genauigkeit = 0,2% +
@1kHz
Q: 0,1...9.999,9
1,5 x 10 3 Ω
0.1% + 1mΩ/|Z|
-180...+180 °
Θ:
15 Ω
∆:
-999,99...999,99 %
Genauigkeit = 0,2% +
@1kHz 2.5Ω
M: 1 µH...100 H
1500 Ω
N: 0,95...500
Genauigkeit = 0,2% + 0,01
0.3% + 1mΩ/|Z|
@1kHz
HM8118E/160812 · C&E · Subject to change without notice · © HAMEG Instruments GmbH
HAMEG Instruments GmbH · Industriestr. 6 · D-63533 Mainhausen · Tel +49 (0) 6182 8000 · F
0.01mΩ
At last, the units need to be adapted, because the second
20Hz
summand has no unit relation, yet:
Secondary Parameters:
Basic accuracy D, Q: ±0.0001 @ f = 1 kHz
accuracy = 0,2% + 0,01 = 0,2 + (0,01 x 100%) = 0,2% + 1% = 1,2%
@1kHz
Phase angle: ±0.005° @ f = 1 kHz
For the 10pF component this leads to:
Ranges
|Z|, R, X: 0.01 mΩ...100 MΩ
|Y|, G, B: 10 nS...1,000 S
1.2% of 10pF is 0.12pF.
C: 0.01 pF...100 mF
L: 10 nH...100 kH
Based on the calculation the displayed value will be between
D:
0.0001...9.9999
Q: 0.1...9,999.9
10pF - 0.12pF = 9.88pF and 10pF + 0.12pF = 10.12pF.
-180...+180°
Θ:
∆: -999.99...999.99 %
HM8118D/160812 · C&E · Änderungen vorbehalten · © HAMEG Instruments GmbH
M: 1 µH...100 H
HAMEG Instruments GmbH · Industriestr. 6 · D-63533 Mainhausen · Tel +49 (0) 6182 8000
N: 0.95...500
0.5% +
|Z|/100MΩ
0.1% +
|Z|/1,5GΩ
0.2% +
|Z|/100MΩ
0.5% +
5mΩ/|Z|
+
0.2% + |Z|/10MΩ
2mΩ/|Z|
0.5% +
0,5% +
2mΩ/|Z|
|Z|/100MΩ
0,1% +
|Z|/1,5GΩ
1kHz 10kHz 100kHz
0,2% +
|Z|/100MΩ
0,5% +
5mΩ/|Z|
+
|Z|/10MΩ
0,2% +
2mΩ/|Z|
0,5% +
2mΩ/|Z|
1kHz 10kHz 100 kHz
0.5% +
|Z|/100MΩ
0.1% +
|Z|/1,5GΩ
0.2% +
|Z|/100MΩ
0.5% +
5mΩ/|Z|
+
0.2% + |Z|/10MΩ
2mΩ/|Z|
0.5% +
2mΩ/|Z|
1kHz 10kHz 100kHz
Internal Bias
Resolutio
Range Selecti
Trigger:
Messp
Trigger delay
Messfreque
Measuremen
Frequenzge
FAST
AC Testsign
MEDIUM
Auflösu
SLOW
Pegelgenau
Interne Bia
Other Ins
Auflösu
Test signal lev
Externe Bia
Error Correct
Interner Bi
Save/Recall:
Auflösu
Front-end Pro
Bereichswa
Trigger:
Low Potential
Low Current G
Constant Volt
Trigger Ver
Temperat
Messzeit (f
R, L or C
FAST
Interface:
MEDIU
SLOW
Safety Class:
Power supply
Versch
Power consum
Testsignalp
Measu
Operating tem
Abgleich: Test freque
Storage temp
Save/Recal Frequency
Rel. humidity
Dimensions (W Eingangssc AC test sign
Weight:
Resolu
Drive level Guarding fü
Accessories su Spannunge Internal Bi
Test Cable and Konstantsp Resolu
Recommended
External Bi Tempe
HO118 Binni
Internal Bi R, L od
HO880 Interf
Schnittstel Resolu
HZ13 Interf
Range Sele
HZ14 Interf
Schutzart: Trigger:
HZ33 Test c
Netzanschl
HZ34 Test c
Leistungsa
HZ42 19" R
Arbeitstem Trigger del
HZ72 GPIB-
Measurem Lagertemp
HZ181 4 Ter
Rel. Luftfeu FAST
HZ186 4 Ter
Abmessung MEDIU
Gewicht: SLOW
Im Lieferum Other I
Test signal
HZ184 4-Dra
Error Corre
Empfohlene
Save/Recal
HO118 Bin
Front-end P HO880 IEE
HZ13 Sch
Low Potent
HZ14 Sch
Low Curren
HZ33 Me
Constant V
HZ34 Me
HZ42 Tempe 19"
HZ72 R, L or IEE
Interface: HZ181 4-D
HZ186 4-D
Safety Clas
Power supp
Power cons
Operating t
Storage tem
Rel. humid
Dimension
Weight:
Accessories
Test Cable a
Recommen
HO118 Bin
HO880 Int
® · DQS-certifie
HZ13 Int
HZ14 Int
HZ33 Te
HZ34 Te
HZ42 19"
HZ72 GP
HZ181 4 T
HZ186 4 T
· DQS-z
®