B+K precision 875B User manual

Instruction Manual
MANUAL DE INSTRUCCIÓNES
Model 875B Digital LCR Meter
Medidor Digital LCR Modelo 875B

TABLE OF CONTENTS
ONE: INTRODUCTION
1.1 Inspection
1.2 Included Items
1.3 Unit Descriptions
TWO: OPTERATION AND MEASUREMENT
2.1 Warning
2.2 Cautions
2.3 875B Zero Adjustment and
Impedance Measurement
2.3.1Zero Adjustment and Capacitance
Measurement
2.3.2 Zero Adjustment and Inductance
Measurement
2.3.3Resistance Measurement
2.4 Measurement Parameter Conversions
THREE: SPECIFICATIONS
3.1 Power Source
3.2 Instrument Specifications
3.3 General Specifications
FOUR: USEER MAINTENANCE
4.1 Battery Replacement
4.2 In Case of Difficulties
FIVE: SERVICE INFORMATION
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SPANISH MANUAL

ONE: INTRODUCTION
Congratulations! You ha ve just pur chased some of t he mo st
advanced hand-held digital LCR meter available. This meter is
sure to provide years of reliable service.
The 875B is designed to m easure the param eters of an
impedance e lement w ith high accuracy and speed.
Measurements o f inductance, capacita nce, resistance
(equivalent series resistance) and dissipation factor are provided
for over a broad band of ranges. In addition, you’ll find that it is
ideal for testing SMD ty pe compon ents. P lus, the instrument
offers advanced features, such as the ability to perform precision
measurements of very low resistan ces w ith t he 2 o hm and
20ohm r anges, and id eal for mea suring indu ctances w ith the
200μH t o 200H ranges, a long w ith the un ique drop- proof
construction, comb ine to make the unit the most versatile
handheld LCR meter available today.
With proper care a nd use , the se m eters can pro vide y ears of
reliable op eration. Therefore, it is very important t o com pletely
familiarize yourself with the instrument before attempted use.
Please read this manual carefully, paying particular attention to
the safety section.
1.1 Inspection
When y ou unpa ck y our new Meter from it s or iginal p ackaging,
carefully check each item for damage that may have occurred in
shipment. I f any thing is d amaged or missin g, t ake the ent ire
instrument, including the box and pa cking mat erials, ba ck to the
distributor from w hom it w as pur chased, w here t hey w ill e ither
replace the missing or damaged item or the entire instrument.
1.2 Included Items
Meter Test Leads (1 pair) Battery
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1.3 Unit Description
Please use the dr awings of the 87 5B, in co njunction with the
following descriptions of the con trols and co nnections to help
familiarize you with the unit:
(1) Liquid Crystal Display : Indicates the value of capacitance
connected to the test inputs.
(2) LCR/D Mode Switch : Selects either LCR or Dissipation
Factor measurement mode.
(3) Function/Range Switch : Selects the function and ra nge for
the desired measurement.
(4) Common Terminal Slot : The ne gative ( common) te st
connector for all measurements.
(5) Positive Terminal Slot : The positive (high) test connector
for all measurements.
(6) Common Terminal Jack : The negative (low) banana jack for
measurements r equiring t he us e
of te st leads.
(7) Positive Terminal Jack : The positive (high) banana jack for
measurements requiring the use
of te st leads.
(8) Battery Compartment : Access for the battery.
(9) Tilt Stand : Used to hold the instrument at an
angle o n a level su rface, or w hen
reversed to han g it from a
projection.
(10) Zero Adjust : Control used to zero the display.
(11) Power Switch : Turns pow er to t he in strument on
and off.
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TWO: OPERATION AND MEASUREMENT
2.1 Warning
Electricity can cause severe injur ies or even d eath, sometimes
even with relatively low voltages or currents.
Therefore it is vitally important that any electronic instruments such
as these meters be totally understood before use.
Please do not use this instrume nt, or any other piece of electrical
or electr onic test e quipment, w ithout f irst th oroughly familiarizin g
yourself with its correct operation and use.
2.2 Cautions
(1) To obtain accurate impedance values, perform zero
adjustment before measurements.
(2) Attempted measurement o f ch arged capacitors w ill o verload
the instrument.
(3) If a dead or partially discharged battery is left in the instrument
for an extended period, damage to the unit could result from
battery lea kage. Therefore it is important t o rep lace a
discharged battery prompt ly. Ple ase dispo se o f the u sed
battery in a proper manner. Ad ditionally, if t he instrument will
not be u sed for an extend ed p eriod, a lways remove the
battery from the unit and store it separately.
(4) Do not use so lvents or aromatic hy drocarbons to cle an the
instrument, or the plastic case may be damaged. If cleaning is
necessary, use only a mild solution of warm water and soap.
(5) Capacitors are manufactured to operate under certain
conditions. Since the meter may test a capacitor under
different conditions than of the manufacturer, the values
might not be identical. This is not due to meter error, just
the method of test. Therefore, if this is the case, check
the capacitor’s dissipation factor (≦0.1) and whether the
test was conducted in series or parallel mode (ref.
Section 3.6). Use the equations to convert between the
modes. At this point, one should obtain a value to that
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stated on the capacitor.
(6) To ascertain if the meter is accurate, please use a
standard capacitor that states test conditions.
2.3 875B Zero Adjustments and Impedance Measurements
IMPORTANT INFORMATION:
1. As an added feature, the 875B has +/- offsets. The +/-offsets
allow for measurements when the LCD is not at zero. The +/-
offsets are applicable to components that are measured in the
following mode s: capacitor para llel (C p), in ductor series (Ls)
and resistance series (Rs). The +/- o ffsets are no t applicable
for components th at are te sted C s, Lp or Rp. To u se th is
feature, just sim ply add/subtract the value from the measured
value of a component.
2. For imp edance measurements there are tw o d ifferent test
modes: para llel an d ser ies. The se d istinct t est modes ob tain
different results. Refer to section 2.4 for conversions.
2.3.1 Zero Adjustment and Capacitance Measurement
(1) Set the power switch to the “on” position.
(2) Set the mode switch to the “LCR” position.
(3) Set the Function/Range switch to the appropriate capacitance
range for the capacitor under test. If the capacitance value is
unknown, select the 200pF range.
NOTE: If test leads will be used in the measurement, have them
plugged in the banana jacks, but not connected.
200pF, 2nF, 20nF, 200nF & 2µF Range (Cp):
Zero Adjustment (Cp Mode)
(4) Set the Capacitance meter to the se lected Capacitance
range.
(5) Using a small, f lat-blade screwdriver, slowly turn the “0 Adj”
control to calibrate the display for a zero re ading. Now the
meter is calibrated for these four ranges.
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(6) Set the m eter to p roper capacitance range and go to step
seven to measure capacitance.
20µF, 200µF, 2mF & 20mF (Cs): Range
Zero Adjustment (Cs Mode)
(4) Set the capacitance meter to the 2µF Capacitance range.
(5) Using a small, f lat-blade screwdriver, slowly turn the “0 Adj”
control to calibrate the display for a zero re ading. Now the
meter is calibrated for these four ranges.
(6) Set the meter to p roper capacitance range a nd g o to step
seven to measure capacitance.
Capacitance & Dissipation Factor Measurements
(7) Discharge the capacitor to be measured.
(8) Insert the capacitor leads into the component test sockets at
the front of the meter. If the capacitor leads are too short, use
the alligator clip leads provided with the instrument to connect
to the capacitor. Be sure to o bserve the proper po larity if t he
capacitor is a polarized type.
(9) Read the capacitance value in the d isplay. If “1---“(a one w ith
the fo llowing 3 dig its blanked) is sh own (w hich indicates an
over-range reading), move the range switch to the next higher
capacitance. If necess ary, perform ze ro ad justment b efore
measurement.
(10) To measure the “D issipation Factor” of the capa citor, set the
mode switch to th e “D” po sition, a nd read t he d issipation
factor value in the display.
(11) ESR Fur capacitors
“Equivalent Ser ies Resistan ce” is ty pically much larger than
the actual “ohmic” series resistance of the wire leads and foils
that ar e phy sically in series w ith the heart of a ca pacitor,
because ESR includes also the effect of dielectric loss. SR is
related to D by the formu la E SR=Rs=D/wCs (w here w
represents “ome ga” =2 p i times freq uency). In 20 mf ra nge,
the d issipation fa ctor can be obtained by the formu lary D=
5

WCsRs w here C s in th e mea sured va lue and R s is
measured by 2Ω r ange.
NOTE: To avoid possible damage to the instrument, discharge all
capacitors before attemp ting to measure the va lue or
dissipation factor.
2.3.2 Zero Adjustment and Inductance Measurements
200µH, 2mH, 20mH, 200mH range (Ls):
Zero Adjustment & Measurements
(1) Set the power switch to the “on” position.
(2) Set the mode switch to the “LCR” position.
(3) Set the Function/Range switch to the appropriate range for the
inductor under test. If the indu ctance value is unknown, select
the 200µH range.
NOTE: Each range must have zero adjustment performed.
(4) Using a short piece of w ire, such as a paper clip, temporarily
connect the po sitive and nega tive m easurement terminals
together. A lternatively, if t he clip leads w ill b e u sed for the
measurement p lug the m into the ban ana jacks and connect
the clips together.
(5) Use a small, flat-blade screwdriver and slowly turn the “ 0 Adj”
control to calibrate the display for a zero reading. Remove the
calibration short.
(6) Insert the inductor leads into the component test sockets at the
front of the meter. If the leads are too short, use t he a lligator
clip leads pro vided w ith the instrum ent to connect t o the
inductor.
(7) Read the inductance value in t he display. If “ 1---“ (a one with
the fo llowing 3 d igits b lanked) is shown, move the ra nge
switch to the next higher range until the over range indication is
gone from the display. Repeat steps 4-7.
6

2H, 20H, 200H,range (Lp): Zero Adjustment & Measurements
(1) Set the power switch to “on” position.
(2) Set the mode switch to the “LCR” position.
NOTE: These three ranges (Lp mode) must be zero calibrated at
200mH range.
(3) Set the Function/Range switch to the 200mH range.
(4) Using a short piece of w ire, such as a paper clip, temporarily
connect the po sitive and nega tive m easurement terminals
together. A lternatively, if t he clip leads w ill b e u sed for the
measurement, plug them into the banana jacks and connect
the clip together.
(5) Use a small, flat-blade screwdriver and slowly turn the “ 0 Adj”
control to calibrate the display for a zero reading. Remove the
calibration short.
(6) Insert the inductor leads into the component test sockets at the
front of the meter. If the leads are too short, use t he a lligator
clip leads pro vided w ith the instrum ent to connect t o the
inductor.
(7) Read the inductance value in t he display. If “ 1---“ (a one with
the fo llowing 3 d igits b lanked) is shown, move the ra nge
switch to the next higher range until the over range indication is
gone from the display and a value is obtained.
(8) To mea sure the “ Dissipation Fa ctor” of th e inductor, set the
mode switch to the “D” position, and read the dissipation factor
value in the display.
2.3.3 Resistance Measurements
NOTE: A. The 2, 20, 200, 2K, 20K, 200K, ohm ranges of resistance
needs to be zero adjusted separately.
B. It can not be zero adjusted at 2M and 20M range. There
is always a reading about .120-.140 when input
terminals are shorted to zero adjust,set the range
switch to 200K range and zero adjust.
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(1) Turn unit on.
(2) Set the mode switch to the “LCR” position.
(3) Set the Fun ction/Range switch to the appro priate resista nce
range. If the value of resistance is unknown, select the 2 ohm
range.
(4) Using a short piece of w ire, such as a paper clip, temporarily
connect the po sitive and nega tive m easurement terminals
together. A lternatively, if t he clip leads w ill b e u sed for the
measurement, plug them into the banana jacks and connect
the clips together.
(5) Use a small, flat-blade screwdriver and slowly turn the “O A dj”
control to calibrate the display for a zero reading. Remove the
calibration short.
(7) Insert the resistor leads into the component test sockets at the
front of the meter. If the leads are too short, use t he a lligator
clip leads provided with the instrument to connect to resistor.
2.4 Measurement Parameter Conversions
The paramet er va lue for a co mponent mea sured in a parallel
equivalent circuit and that value me asured in a series equivalent
circuit may be diff erent fro m ea ch o ther. Th is means t hat the
parallel-measured capacitance (inductance) of any given capacitor
(inductor) w ill no t b e equa l t o the ser ies-measured capacitance
(inductance) unless the dissipation factor of the capacitor (inductor)
equals zero. The equat ions in t he tab le be low sh ow the
relationship be tween the para llel- a nd the serie s- m easured
parameters of any given components:
Dissipation Factor Equations
(See table 1)
E.G.1: With a m easurement fre quency of 1KH z, a para llel mo de
capacitance of 1000pF with a dissipation factor of 0.5 is equal to a
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series mode capacitance of 1250pF.
Cs＝( 1 ＋ D × D ) × Cp
Cs＝( 1 ＋ 0.5 × 0.5 ) × 1000pF
Cs＝1250pF
E.G.2: With a me asurement frequ ency of 1K Hz, a series inductance of
1000uH with a d issipation factor of 0 .5 has a series resistance of
3.14 ohms.
Rs＝2 × 3.14 × f × Ls × D
Rs＝2 × 3.14 × 1K × 1m × 0.5
Rs＝3.14
However, a t a ny given mea surement frequency, the d issipation
factor of a component is the same for both parallel equivalent and
series equivalent circuits.
Additionally, the recipro cal of the dissipation fa ctor (1/D) is
equivalent to the quality factor (Q).
THREE: SPECIFICATIONS
3.1 Power Source
Battery Type: 006P 9V battery.
Power Consumption’s: 155mW
NOTE: Specifications and information are subject to
change without notice. Please visit www.bkprecision.com for
the most current product information.
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10

3.2 INSTRUMENT SPECIFICATIONS
Electrical Specifications
(See tables 2)
NOTE: (1) The test leads should be as short as possible to
minimize the measurement error.
(2) For best accuracy, zero adjustment should be
performed appropriatelybefore testing.
Table 2.
CAPACITANCE
Range *Accuracy Resolution Test Condition
200pF 0.1pF
2nF 1pF
20nF 10pF
200nF 100pF
2µF 1000pF
Parallel Mode
1KHz, 0.5Vrms
20µF 0.01µF Series Mode 120Hz, 1mArms
200µF
1%＋2
0.1µfF
2mF 1µF
20mF
2%＋10
10µfF
Series Mode
120Hz, 10mArms
*Accuracy is ± ( % of reading＋number of digits ) When D≦0.1
DISIPATION FACTOR
Range Accuracy
200pF 2nF≦Cx≦2µF 2µF＜Cx≦2mF 20mF
0 ~ 1.999 N.S.
Cx
2000
20%2 ++
N.S.
Cx
2000
10%1 ++
Accuracy is ± ( % of reading＋number of digits ).
Cx is capacitance readout in counts.
Accuracy is a pplied when C is from 20 to 100% of full scale range in series
mode measurements.
Parallel Mode
fCpRp
Dc
π 21
=
Cp
Rp
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Series Mode
fCsRsDc
π
2
=
Cs Rs
RESISTANCE
Range Accuracy Resolution Test Condition
2Ω 1%＋5 1mΩ 10mArms
20Ω 10mΩ 10mArms
200Ω 100mΩ 1mArms
2KΩ 1Ω 0.1mArms
20KΩ 10Ω 10µArms
200KΩ
1%＋2
100Ω
Series
Mode
1KHz
1µArms
2MΩ 1KΩ
20MΩ 2%＋2 10KΩ
Parallel Mode
1KHz, 0.5Vrms
Accuracy is ± ( % of reading＋number of d igits ) an d is applied from 10 to
100% of full scale range in parallel mode measurements.
In series mode measurements, the compliance voltage (voltage drop on the
device under test) should be less than 0.2 Vrms.
INDUCTANCE
Range Accuracy Resolution Test Condition
200µH 2%＋2 0.1µH 10mArms, 1KHz
2mH 1µH 10mArms, 1KHz
20mH 10µH 1mArms, 1KHz
200mH
1%＋2
100µH
Series
Mode
0.1mArms,1KHz
2H 1mH
20H 10mH
200H
Not
Specified＊ 100mH
Parallel Mode
120Hz, 0.5Vrms
Accuracy is ± ( % of reading＋number of digits ) When D≦0.1.
The accuracy is applied from 10 to 100% of full scale range in parallel mode
measurements.
＊Ranges for reference only.
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DISSIPATION FACTOR
Range Accuracy
Lx≦200mH 200mH＜Lx＜200H
0 ~ 1.999
Lx
2000
20%2 ++
Lx
2000
10%1 ++
Accuracy is ± ( % of reading＋number of digits ).
Lx is inductance readout in counts.
Accuracy is applied when L is from 20 to 100% of full scale range in parallel
mode measurements.
Parallel Mode
Rp
Lp
fD
L
π 2=
Lp
Rp
Series Mode
fLs
Rs
D
L
π 2
=
Ls Rs
NOTE : ALL THE ACCURACY IS GUARANTEED AT TEMPERATURE
OF 15℃ TO 28℃, RELATIVE HUMIDITY TO 80% AND HALF
YEAR CALIBRATION CYCLE.
3.3 GENERIAL SPECIFICATIONS
Power Single 9V 006P Battery
Display 0.5
〞 digital height, 3 1/2 digits liquid crystal
display with “LOBAT” and decimal annunciates
Low Battery Warning Display will show “LOBAT” in the last 5% of
Battery life
Current Consumption 17.3mA
Temperature 0℃ ~ 40℃, Operating
-20℃ ~ 70℃, Storage
Dimensions 177×88×40mm
Weight 400 gram
Standard Accessories Test Clips (red & black) 1 pair
Operation Manual 1 piece
Optional Accessories Measurement clip TL-8 for SMD type component
13

FOUR: USER MAINTENANCE
4.1 Battery Replacement
When t he instrument disp lays the “LO BAT” ind ication, t he battery
must be replaced t o maintain proper operation. Please perform the
following steps to change the battery:
(1) Remove the battery hatch by sliding it towards the bottom of the
instrument.
(2) Unsnap the ba ttery clip from t he o ld battery . Snap the clip in
place on a new battery . Plea se d ispose of used bat teries in a
proper manner.
(3) Place the new battery in the battery compartment.
(4) Replace the b attery hatch by reversin g the pro cedure u sed to
remove it.
4.2 In Case of Difficulties
These meters are designed to be accurate, reliable, and easy-to-use.
However, it is po ssible that y ou may experien ce d ifficulties dur ing
operation. If there appears to be any kind o f problem during use of
the instrument, please perform the following steps to help determine
the source:
(1) Reread the operating instructions. It is very easy to inadvertently
make mistakes in operating procedure.
(2) Inspect and check the continuity of the test leads. The instrument
will not function properly with broken test leads.
(3) Remove and te st t he battery . The in strument w ill not fu nction
properly with a discharged battery.
If the proceeding three steps fail to resolve the problem, please refer
to the “S ervice I nformation” section or con tact y our nearest
distributor.
NOTE: ATTEMPTED REPAIR, MODIFICAT IONS, OR TAM PERING BY
UNAUTHORIZED PERSONNELWILL VOID THE WARRANTTY.
14

Limited Three-Year Warranty
B&K Precision Corp. warrants to the original purchaser that its
products and the component parts thereof, will be free from
defects in workmanship and materials for a period of three
years from date of purchase.
B&K Precision Corp. will, without charge, repair or replace, at
its option, defective product or component parts. Returned
product must be accompanied by proof of the purchase date in
the form of a sales receipt.
To obtain warranty coverage in the U.S.A., this product must
be registered by completing a warranty registration form on
www.bkprecision.com within fifteen (15) days of purchase.
Exclusions: This warranty does not apply in the event of
misuse or abuse of the product or as a result of unauthorized
alterations or repairs. The warranty is void if the serial number
is altered, defaced or removed.
B&K Precision Corp. shall not be liable for any consequential
damages, including without limitation damages resulting from
loss of use. Some states do not allow limitations of incidental
or consequential damages. So the above limitation or exclusion
may not apply to you.
This warranty gives you specific rights and you may have other
rights, which vary from state-to-state.
B&K Precision Corp.
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
www.bkprecision.com
714-921-9095
15

Service Information
Warranty Service: Please return the product in the original
packaging with proof of purchase to the address below. Clearly
state in writing the performance problem and return any leads,
probes, connectors and accessories that you are using with the
device.
Non-Warranty Service: Return the product in the original
packaging to the address below. Clearly state in writing the
performance problem and return any leads, probes, connectors
and accessories that you are using with the device. Customers
not on open account must include payment in the form of a
money order or credit card. For the most current repair charges
please visit www.bkprecision.com and click on
“service/repair”.
Return all merchandise to B&K Precision Corp. with pre-paid
shipping. The flat-rate repair charge for Non-Warranty Service
does not include return shipping. Return shipping to locations
in North American is included for Warranty Service. For
overnight shipments and non-NorthAmerican shipping fees
please contact B&K Precision Corp.
B&K Precision Corp.
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
www.bkprecision.com
714-921-9095
Include with the returned instrument your complete return
shipping address, contact name, phone number and description
of problem.
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MANUAL DE INSTRUCCIÓNES
Medidor Digital LCR Modelo 875B

18
INDICE
UNO: INTRODUCCION
1.1 Inspección
1.2 Partes incluidas
1.3 Descripción de la unidad
DOS: OPERACIÓN Y MEDICIONES
2.1 Advertencia
2.2 Precauciones
2.3 Ajuste de cero y medición de
impedancia
2.3.1Ajuste de cero y medición de
capacitancia
2.3.2 Ajuste de cero y medición de
inductancia
2.3.3 Medición de resistencia
2.4 Conversiones de parámetros de
medición
TRES: 3.1 Fuente de poder
3.2 Especificaciones del Instrumento
3.3 Especificaciones Generales
CUATRO: MANTENIMIENTO DEL USUARIO
4.1 Reemplazo de batería
4.2 En caso de dificultades
CINCO: INFORMACION SOBRE SERVICIO