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Models
885 & 886
LCR METER
OPERATING
MANUAL
MANUAL DE INSTRUCCIÓNES
MEDIDOR LCR
Modelos 885 & 886
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Contents
1. INTRODUCTION ...............................................................
1.1 G
ENERAL
............................................................................. 1
MPEDANCE PARAMETERS
1.2 I
PECIFICATION
1.3 S
CCESSORIES
1.4 A
.................................................................... 6
.................................................................... 19
.................................................. 3
2. OPERATION ...................................................................... 21
2.1 P
HYSICAL DESCRIPTION
AKING MEASUREMENT
2.2 M
2.2.1 Battery Re placement ............................................................... 22
2.2.2 Battery Recharging/AC operation .......................................... 23
2.2.3 Open and Short Calibration ................................................... 24
2.2.4 Display Sp eed .......................................................................... 25
2.2.5 Relative Mode ......................................................................... 25
2.2.6 Range Hold.............................................................................. 25
2.2.7 DC Resistance Measurement .................................................. 26
2.2.8 AC Impedance Measurement .................................................. 26
2.2.9 Capacitance Measurement ..................................................... 26
2.2.10 Inductance Measurement ........................................................ 27
2.3 A
CCESSORY OPERATION
................................................... 21
................................................. 21
................................................... 28
4. APPLICATION .................................................................. 30
4.1 T
EST LEADS CONNECTION
PEN/SHORT COMPENSATION
4.2 O
ELECTING THE SERIES OR PARALLEL MODE
4.3 S
............................................... 30
.......................................... 35
.................. 37
5. LIMITED ONE-YEAR WARRANTY ........................... 37
6. SAFETY PRECAUTION ................................................. 42
1
1. Introduction
1.1 General
The B&K Precision Models 885 & 886 Synthesized In-Circuit
LCR/ESR Meter is a high accuracy hand held portable test
instrument used for measuring inductors, capacitors and resistors
with a basic accuracy of 0.2%. It is the most adva nced handheld
AC/DC impedance measurement instrument to date. The 885 or 886
can help engineers and student s to understand the character istic of
electronics components as well as being an essential tool on any
service bench.
The instrument is auto or manual ranging. Test frequencies of
100Hz, 120Hz, 1KHz 10KHz or 100KHz (886) may be selecte d on
all applicable ranges. The test voltages of 50mVrms, 0.25Vrms,
1Vr ms or 1VDC (DCR only) may also be selected on all applicable
ranges. The dual display feature permits simultaneous
measurements.
Components can be measured in the series or parallel mode as
desired; the more standard method is automatically selected first but
can be overridden.
The Model 885 and 886 offers three useful modes for sorting
components.
The highly versatile Mode ls can perf orm virtua lly all the functions
of most bench type LCR bri dges. With a basic accuracy of 0.2%,
this economical LCR meter may be adequately substituted for a
1
more expensive LCR bridge in many situations. The meter is
powered from two AA Batteries and is supplie d with an AC to DC
charging adapter and two AA Ni-Mh Rechargeable Batteries.
The instrument has applications in electronic engineering labs,
production facilitie s, service shops, and schools. It can be used to
check ESR v alues of capacito rs , sort values, select precision values,
measure unmarked and unknown i nductors, capacit ors or resistor s,
and to measure capacitance, inductance, or resistance of cables,
switches, circuit boar d foils, etc.
The key features are as following:
Te st condition:
Frequency : 100Hz / 120Hz / 1KHz / 10KHz /
1
100KHz (886)
Level : 1Vrms / 0.25Vr ms / 50mVrms /
2.
1VDC (DCR only)
Measurement Parameters : Z, Ls, Lp , C s, C p , D C R ,
Basic Accu racy: 0.2%
Dual Liquid Crystal Display
Fast/Slow Measurement
Auto Range or Range Hold
Open/Short Calibrati on
Primary Parameters Display:
ESR, D, Q and
θ
Z : AC Impedance
DCR : DC Resistance
Ls : Serial Inductance
Lp : Parallel Inductance
2
Cs : Serial Capacitance
Cp : Parallel Capacitance
Second Parameter Display:
θ
: Phase Angle
ESR : Equivalence Serial Resistance
D : Dissipati on Fact or
Q : Quality Factor
Combinations of Display:
Serial Mode : Z –
θ
, Cs – D, Cs – Q, Cs – ESR, Ls –
D, Ls – Q, Ls – ESR
Parallel M od e : Cp – D, Cp – Q, Lp – D, Lp – Q
1.2 Impedanc e Parameters
Due to the different test ing signal s on t he impedance mea surement
instrument, there are DC impedance and AC impedance. The
common digital multi -meter can only measure the DC impedance,
but the Model 885 can do both. It is a very important issue to
understand the impedance parameters of the electronic component.
When we analysis the impedance by the impedance measurement
plane (Figure 1.1). It can be visualized by the rea l element on the
X-axis and the imaginary element on the y-axis. This impedance
measuremen t plan e can also be seen as th e pola r coordin at es. Th e Z
θ
is the magnitude and the
is the phase of the impedance.
3
( )
( )
( )
( )
( )
Ohm
Reactance
Resistance
Impedance
1
22
=Ω
=
=
=
==
+==
Ω∠=+=
−
S
S
s
s
s
sss
ss
X
R
Z
R
X
TanSinZX
XRZCosZR
ZjXRZ
θθ
θ
θ
s
X
s
R
( )
sX,RZ
s
Z
θ
Imaginary Axis
Real Axis
Figure 1.1
fCC
X
fLLX
C
L
πω
πω
2
11
2====
There are two different types of reactance: Inductive (X
Capacitive (X
). It can be defined as f ollows:
C
L = Inductance (H)
Also, there are quality factor (Q) and the dissipation fac tor (D) that
need to be discussed. For component, the quality fa ctor serve s as a
measure of the reacta nce purity. In the re al world, t here is always
C = Capacitance (F)
f = Frequency (Hz)
4
) and
L
pp
p
p
p
p
sss
s
s
s
RC
L
R
X
R
G
B
RCR
L
R
X
D
Q
ω
ω
ω
ω
δ
===
=
===
==
1
tan
11
some associated resistance that dissipates power, decreasing the
amount of energy that can be rec overed. The quality fac tor can be
defined as the ratio of the stored energy (reactance) and the
dissipated energy (resistance). Q is generally used for inductors and
D for capacito rs .
There are two types of the circuit mode. One is series mode, the
other is parallel mode. See Fi gure 1.2 t o find out t he rela tion of t he
series and parallel mode.
5
Parameter
Range
Z
L
0.000 µH to 9999 H
C
0.000 pF to 9999 F
DCR
ESR
D
0.000 to 9999
Q
0.000 to 9999
ss
jXRZ +=
Real and imaginary components are Parallel
jB=1/jX
jBGY +=
jX
R
P
jX
1
P
R
1
Y +=
Real and imaginary components are serial
Rs jX
s
p
p
Figure 1.2
G=1/R
1.3 Specification
LCD Display Range:
0.000 Ω to 9999 MΩ
0.000 Ω to 9999 MΩ
0.000 Ω to 9999 Ω
6
p
p
|Zx|
20M ~
(Ω)
10M ~
(Ω)
1M ~
(Ω)
100K ~
(Ω)
10 ~ 1
(Ω)
1 ~ 0.1
(Ω)
DCR
100Hz
120Hz
1KHz
10KHz
100KHz
NA
2
1 Dx+
θ
-180.0 ° to 180.0 °
Accuracy (Ae):
Z Accuracy:
10M
1M
100K
10
Freq.
2% ±1
5% ±1
±
1 0.5% ±1 0.2% ±1 0.5% ±1 1% ±1
1%
2% ±1
(886)
5%±1
2%±1 0.4% ±1 2%±1 5%±1
Note : 1.The accuracy applies wh en th e test level is set to 1V rms.
2.Ae multiplies 1. 25 when the test level is set to 250mVrms.
3.Ae multiplies 1.50 when the test level is set to 50mVrms.
4.When measuring L and C, multiply Ae by
Dx
＞
0.1.
: Ae is not specified if th e test level is set to 50mV.
7
if the
79.57
pF
159.1
nF
1.591
nF
15.91
uF
159.1
uF
1591
mF
2% ± 1
1% ± 1
0.5%
± 1
0.2%
± 1
0.5%
± 1
1% ± 1
66.31
pF
132.6
nF
1.326
nF
13.26
uF
132.6
uF
1326
mF
2% ± 1
1% ± 1
0.5%
1
0.2%
1
0.5%
1
1% ± 1
7.957
pF
15.91
pF
159.1
nF
1.591
uF
15.91
uF
159.1
mF
2% ± 1
1% ± 1
0.5%
± 1
0.2%
± 1
0.5%
± 1
1% ± 1
0.795
pF
1.591
pF
15.91
pF
159.1
uF
1.591
uF
15.91
uF
5% ± 1
2% ± 1
0.5%
± 1
0.2%
± 1
0.5%
± 1
1% ± 1
NA
0.159
pF
1.591
pF
15.91
nF
159.1
uF
1.591
uF
C Accuracy :
100Hz
120Hz
159.1
132.6
pF
|
pF
|
pF
|
1.591
pF
|
1.326
nF
|
15.91
nF
|
13.26
nF
|
159.1
nF
|
132.6
uF
|
1591
uF
|
1326
uF
|
15.91
uF
|
13.26
1KHz
10KHz
100KHz
(886)
pF
|
15.91
pF
|
1.591
pF
|
159.1
pF
|
15.91
pF
|
1.591
±
pF
|
1.591
pF
|
159.1
pF
|
15.91
8
±
nF
|
15.91
pF
|
1.591
pF
|
159.1
±
uF
|
159.1
uF
|
15.91
nF
|
1.591
uF
|
1.591
uF
|
159.1
uF
|
15.91
NA
5% ± 1
2%± 1
0.4%
1
2%± 1
5% ± 1
31.83
KH
15.91
H
1591
H
159.1
mH
15.91
mH
1.591
uH
2% ± 1
1% ± 1
0.5%
± 1
0.2%
± 1
0.5%
± 1
1% ± 1
26.52
KH
13.26
H
1326
H
132.6
mH
13.26
mH
1.326
uH
2% ± 1
1% ± 1
0.5%
± 1
0.2%
± 1
0.5%
± 1
1% ± 1
31.83
KH
1.591
H
159.1
H
15.91
mH
1.591
uH
159.1
uH
2% ± 1
1% ± 1
0.5%
1
0.2%
1
0.5%
1
1% ± 1
318.3
H
159.1
H
15.91
H
1.591
uH
159.1
uH
15.91
uH
5% ± 1
2% ± 1
0.5%
0.2%
0.5%
1% ± 1
31.83
H
15.91
H
1.591
mH
159.1
uH
15.91
uH
1.591
uH
L Accuracy :
KH
100Hz
120Hz
1KHz
10KHz
15.91
KH
13.26
KH
1.591
159.1
H
KH
|
|
1591
159.1
KH
|
|
1326
132.6
KH
|
|
159.1
15.91
H
|
|
15.91
1.591
H
|
H
|
H
|
±
H
|
± 1
±
H
|
H
|
H
|
±
H
|
± 1
mH
1.591
mH
1.326
mH
159.1
±
uH
15.91
± 1
15.91
13.26
1.591
159.1
mH
|
|
159.1
mH
|
|
132.6
uH
|
|
15.91
uH
|
|
1.591
100KHz
(886)
H
|
15.91
H
|
1.591
H
|
159.1
9
mH
|
15.91
uH
|
1.591
uH
|
0.159
NA
5% ± 1
2%± 1
0.4%
1
2%± 1
5% ± 1
|Zx|
Freq.
20M ~
(Ω)
10M ~
(Ω)
1M ~
(Ω)
100K ~
(Ω)
10 ~ 1
(Ω)
1 ~ 0.1
(Ω)
±
0.020
±
0.010
±
0.005 ±0.002 ±0.005 ±0.010
±
0.050
±
0.020
100KHz
(886)
NA ±0.050
±
0.020 ±0.004 ±0.020 ±0.050
|Zx|
Freq.
20M ~
(Ω)
10M ~
(Ω)
1M ~
(Ω)
100K ~
(Ω)
10 ~ 1
(Ω)
1 ~ 0.1
(Ω)
±
1.046
±
0.523
±
0.261 ±0.105 ±0.261 ±0.523
±
2.615
±
1.046
100KHz
(886)
NA ±2.615
±
1.046 ±0.209 ±1.046 ±2.615
D Accuracy :
100Hz
120Hz
1KHz
10KHz
θ Accuracy :
100Hz
120Hz
1KHz
10KHz
10M
10M
1M
100K
1M
100K
10
±
10
10