B+K precision 894 User manual

Models: 894, 895
500 kHz/1 MHz LCR Meter
USER MANUAL
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

2
Safety Summary
The following safety precautions apply to both operating and maintenance personnel and must
be followed during all phases of operation, service, and repair of this instrument.
Before applying power to this instrument:
Read and understand the safety and operational information in this manual.
Apply all the listed safety precautions.
Verify that the voltage selector at the line power cord input is set to the correct line voltage.
Operating the instrument at an incorrect line voltage will void the warranty.
Make all connections to the instrument before applying power.
Do not operate the instrument in ways not specified by this manual or by B&K Precision.
Failure to comply with these precautions or with warnings elsewhere in this manual violates the
safety standards of design, manufacture, and intended use of the instrument. B&K Precision
assumes no liability for a customer’s failure to comply with these requirements.
Category rating
The IEC 61010 standard defines safety category ratings that specify the amount of electrical
energy available and the voltage impulses that may occur on electrical conductors associated
with these category ratings. The category rating is a Roman numeral of I, II, III, or IV. This rating
is also accompanied by a maximum voltage of the circuit to be tested, which defines the voltage
impulses expected and required insulation clearances. These categories are:
Category I (CAT I): Measurement instruments whose measurement inputs are not intended to
be connected to the mains supply. The voltages in the environment are typically derived from a
limited-energy transformer or a battery.
Category II (CAT II): Measurement instruments whose measurement inputs are meant to be
connected to the mains supply at a standard wall outlet or similar sources. Example
measurement environments are portable tools and household appliances.
Category III (CAT III): Measurement instruments whose measurement inputs are meant to be
connected to the mains installation of a building. Examples are measurements inside a
building's circuit breaker panel or the wiring of permanently-installed motors.
Category IV (CAT IV): Measurement instruments whose measurement inputs are meant to be
connected to the primary power entering a building or other outdoor wiring.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

3
Do not use this instrument in an electrical environment with a higher category rating than what
is specified in this manual for this instrument.
You must ensure that each accessory you use with this instrument has a category rating equal to
or higher than the instrument's category rating to maintain the instrument's category rating.
Failure to do so will lower the category rating of the measuring system.
Electrical Power
This instrument is intended to be powered from a CATEGORY II mains power environment. The
mains power should be 115 V RMS or 230 V RMS. Use only the power cord supplied with the
instrument and ensure it is appropriate for your country of use.
Ground the Instrument
To minimize shock hazard, the instrument chassis and cabinet must be connected to an
electrical safety ground. This instrument is grounded through the ground conductor of the
supplied, three-conductor AC line power cable. The power cable must be plugged into an
approved three-conductor electrical outlet. The power jack and mating plug of the power cable
meet IEC safety standards.
Do not alter or defeat the ground connection. Without the safety ground connection, all
accessible conductive parts (including control knobs) may provide an electric shock. Failure to
use a properly-grounded approved outlet and the recommended three-conductor AC line power
cable may result in injury or death.
Unless otherwise stated, a ground connection on the instrument's front or rear panel is for a
reference of potential only and is not to be used as a safety ground.
Do not operate in an explosive or flammable atmosphere
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

4
Do not operate the instrument in the presence of flammable gases or vapors, fumes, or finely-
divided particulates.
The instrument is designed to be used in office-type indoor environments. Do not operate the
instrument
In the presence of noxious, corrosive, or flammable fumes, gases, vapors, chemicals, or finely-
divided particulates.
In relative humidity conditions outside the instrument's specifications.
In environments where there is a danger of any liquid being spilled on the instrument or where
any liquid can condense on the instrument.
In air temperatures exceeding the specified operating temperatures.
In atmospheric pressures outside the specified altitude limits or where the surrounding gas is
not air.
In environments with restricted cooling air flow, even if the air temperatures are within
specifications.
In direct sunlight.
This instrument is intended to be used in an indoor pollution degree 2 environment. The
operating temperature range is 0 °C to 40 °C and 20% to 80% relative humidity, with no
condensation allowed.
Measurements made by this instrument may be outside specifications if the instrument is used
in non-office-type environments. Such environments may include rapid temperature or
humidity changes, sunlight, vibration and/or mechanical shocks, acoustic noise, electrical noise,
strong electric fields, or strong magnetic fields.
Do not operate instrument if damaged
If the instrument is damaged, appears to be damaged, or if any liquid, chemical, or other
material gets on or inside the instrument, remove the instrument's power cord, remove the
instrument from service, label it as not to be operated, and return the instrument to B&K
Precision for repair. Notify B&K Precision of the nature of any contamination of the instrument.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

5
Clean the instrument only as instructed
Do not clean the instrument, its switches, or its terminals with contact cleaners, abrasives,
lubricants, solvents, acids/bases, or other such chemicals. Clean the instrument only with a
clean dry lint-free cloth or as instructed in this manual.
Not for critical applications
This instrument is not authorized for use in contact with the human body or for use as a
component in a life-support device or system.
Do not touch live circuits
Instrument covers must not be removed by operating personnel. Component replacement and
internal adjustments must be made by qualified service-trained maintenance personnel who
are aware of the hazards involved when the instrument's covers and shields are removed.
Under certain conditions, even with the power cord removed, dangerous voltages may exist
when the covers are removed. To avoid injuries, always disconnect the power cord from the
instrument, disconnect all other connections (for example, test leads, computer interface
cables, etc.), discharge all circuits, and verify there are no hazardous voltages present on any
conductors by measurements with a properly-operating voltage-sensing device before touching
any internal parts. Verify the voltage-sensing device is working properly before and after making
the measurements by testing with known-operating voltage sources and test for both DC and
AC voltages. Do not attempt any service or adjustment unless another person capable of
rendering first aid and resuscitation is present.
Do not insert any object into an instrument's ventilation openings or other openings.
Hazardous voltages may be present in unexpected locations in circuitry being tested when a
fault condition in the circuit exists.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

6
Fuse replacement
Fuse replacement must be done by qualified service-trained maintenance personnel who are
aware of the instrument's fuse requirements and safe replacement procedures. Disconnect the
instrument from the power line before replacing fuses. Replace fuses only with new fuses of the
fuse types, voltage ratings, and current ratings specified in this manual or on the back of the
instrument. Failure to do so may damage the instrument, lead to a safety hazard, or cause a fire.
Failure to use the specified fuses will void the warranty.
Servicing
Do not substitute parts that are not approved by B&K Precision or modify this instrument.
Return the instrument to B&K Precision for service and repair to ensure that safety and
performance features are maintained.
Cooling fans
This instrument contains one or more cooling fans. For continued safe operation of the
instrument, the air inlet and exhaust openings for these fans must not be blocked nor must
accumulated dust or other debris be allowed to reduce air flow. Maintain at least 25 mm
clearance around the sides of the instrument that contain air inlet and exhaust ports. If
mounted in a rack, position power devices in the rack above the instrument to minimize
instrument heating while rack mounted. Do not continue to operate the instrument if you
cannot verify the fan is operating (note some fans may have intermittent duty cycles). Do not
insert any object into the fan's inlet or outlet.
For continued safe use of the instrument
Do not place heavy objects on the instrument.
Do not obstruct cooling air flow to the instrument.
Do not place a hot soldering iron on the instrument.
Do not pull the instrument with the power cord, connected probe, or connected test lead.
Do not move the instrument when a probe is connected to a circuit being tested.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

7
Compliance Statements
Disposal of Old Electrical & Electronic Equipment (Applicable in the European
Union and other European countries with separate collection systems)
This product is subject to Directive 2002/96/EC of the European Parliament
and the Council of the European Union on waste electrical and electronic
equipment (WEEE), and in jurisdictions adopting that Directive, is marked as
being put on the market after August 13, 2005, and should not be disposed
of as unsorted municipal waste. Please utilize your local WEEE collection
facilities in the disposition of this product and otherwise observe all
applicable requirements.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

8
CE Declaration of Conformity
This instrument meets the requirements of 2006/95/EC Low Voltage Directive and
2004/108/EC Electromagnetic Compatibility Directive with the following standards.
Low Voltage Directive 2006/95/EC
EN 61010:2010
EN 61010-2-030:2010
EMC Directive 2004/108/EC
EN 61326-1:2013
EN 6100-3-2:2006+A1:2009+A2:2009
EN 61000-3-3:2008
(CISPR 11:2009+A1:2010
IEC 61000-4-2:2008
IEC 61000-4-3-:2006+A1:2007+A2:2010
IEC 61000-4-4:2012
IEC 61000-4-5:2005
IEC 61000-4-6:2008
IEC 61000-4-11:2004)
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

9
Safety Symbols
Refer to the user manual for warning information to avoid
hazard or personal injury and prevent damage to instrument.
Electric Shock hazard
Alternating current (AC)
Chassis (earth ground) symbol.
Ground terminal
On (Power). This is the In position of the power switch when
instrument is ON.
Off (Power). This is the Out position of the power switch when
instrument is OFF.
CAUTION indicates a hazardous situation which, if not avoided,
will result in minor or moderate injury
WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury
DANGER indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
NOTICE is used to address practices not related to physical injury.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

10
Contents
Product Overview........................................................................................................... 15
Package Contents ........................................................................................................... 15
Dimensions..................................................................................................................... 16
Front Panel Overview..................................................................................................... 17
Front Panel Description ................................................................................................. 17
Rear Panel Overview ...................................................................................................... 18
Rear Panel Description................................................................................................... 18
Display Overview............................................................................................................ 19
Display Description ........................................................................................................ 19
Input Power Requirements ............................................................................................ 20
Input Power.................................................................................................................... 20
Fuse Requirements ........................................................................................................ 20
Fuse Replacement.......................................................................................................... 21
Leakage current ............................................................................................................. 21
Preliminary Check........................................................................................................... 21
Safety Requirements ...................................................................................................... 21
Measurement Display Menu.......................................................................................... 23
Measurement Parameters.............................................................................................. 24
Primary Parameters ....................................................................................................... 24
Secondary Parameters................................................................................................... 25
Parameter Combinations............................................................................................... 25
Selecting Primary and Secondary Parameters............................................................... 26
Test range ...................................................................................................................... 29
Test frequency ............................................................................................................... 29
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

11
Test Signal Level............................................................................................................. 30
DC BIAS........................................................................................................................... 31
Test speed ...................................................................................................................... 32
Digits Resolution ............................................................................................................ 32
Zoom .............................................................................................................................. 33
Correction....................................................................................................................... 34
Sweep Correction........................................................................................................... 36
Short Correction............................................................................................................. 37
Load Correction (Point-Frequency Correction) ............................................................. 38
Cable Length Selection ................................................................................................... 41
Impedance Parameters .................................................................................................. 41
Series and Parallel Models............................................................................................. 43
Choosing a Test Frequency ............................................................................................ 43
Choosing a Measurement Circuit Model ....................................................................... 44
Measure Setup Menu..................................................................................................... 46
Trigger Mode (TRIG)....................................................................................................... 47
Auto Level Control (ALC)................................................................................................ 48
Bias Current Isolation..................................................................................................... 48
Average (AVG)................................................................................................................ 49
Level Monitor (Vm/Im) .................................................................................................. 49
Delay Time (DELAY)........................................................................................................ 50
Output Impedance......................................................................................................... 50
Deviation Test Function (DEV A/DEV B)......................................................................... 51
Measurement Parameters (PARAM) .............................................................................. 53
Swap Parameters ........................................................................................................... 53
Compare Function Modes (MODE) ................................................................................ 53
Tolerance Mode............................................................................................................. 54
Auxiliary Bin (AUX) ......................................................................................................... 55
Comparator Function (COMP)........................................................................................ 56
Enabling Compare Function........................................................................................... 56
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

12
High/Low Limits.............................................................................................................. 56
Bin Count Display ........................................................................................................... 58
PARAM ........................................................................................................................... 59
NOM............................................................................................................................... 59
COUNT............................................................................................................................ 59
BIN.................................................................................................................................. 60
HIGH/LOW...................................................................................................................... 60
AUX................................................................................................................................. 60
OUT ................................................................................................................................ 60
No. ............................................................................................................................. 61
Mode ......................................................................................................................... 62
Sweep Parameter ...................................................................................................... 62
Limit Parameters ....................................................................................................... 63
High/Low Limits......................................................................................................... 64
Delay.......................................................................................................................... 64
List Sweep Display Fields................................................................................................ 66
Running a List Sweep Example....................................................................................... 67
System Setup .................................................................................................................. 72
Pass Beep ....................................................................................................................... 72
Fail Beep......................................................................................................................... 73
Language ........................................................................................................................ 73
Password........................................................................................................................ 74
Bus Mode ....................................................................................................................... 74
GPIB ADDR (895 only) .................................................................................................... 74
Talk Only......................................................................................................................... 75
Bias SRC.......................................................................................................................... 75
Baud Rate....................................................................................................................... 75
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

13
Date/Time ...................................................................................................................... 75
LAN Setup ....................................................................................................................... 76
Default Settings and System Reset................................................................................. 77
File Management ........................................................................................................... 77
Setup file (*.STA)............................................................................................................ 78
Save Screenshot............................................................................................................. 81
Save Measurements File ................................................................................................ 81
USB Flash Driver Requirements ..................................................................................... 81
Basic Accuracy A............................................................................................................. 85
Measurement Accuracy Ae ............................................................................................ 86
Measurement Correction Factors.................................................................................. 86
Accuracy of D ................................................................................................................. 90
Accuracy of Q ................................................................................................................. 90
Accuracy of θ.................................................................................................................. 90
Accuracy of G ................................................................................................................. 90
Accuracy of Rp ............................................................................................................... 91
Accuracy of Rs ................................................................................................................ 91
Accuracy of DCR ............................................................................................................. 91
Accuracy of leakage inductance Lk ................................................................................ 91
Accuracy Calculation Examples ...................................................................................... 92
Example 1....................................................................................................................... 92
Example 2....................................................................................................................... 93
.................................................................................................. 96
RS-232 ............................................................................................................................ 96
USB (USBCDC - Virtual COM ) ........................................................................................ 97
USBTMC ......................................................................................................................... 97
LAN (Ethernet) ............................................................................................................... 97
GPIB (895 Only).............................................................................................................. 98
Remote Commands........................................................................................................ 98
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

14
Technical description...................................................................................................... 99
Handler Operation........................................................................................................ 100
Electrical features......................................................................................................... 107
HANDLER Interface Board Circuit ................................................................................ 108
Handler......................................................................................................................... 110
Operation ..................................................................................................................... 110
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

15
1. General Information
Product Overview
The B&K Precision models 894 and 895 are precision bench LCR meters. They are capable of
measuring the capacitance, inductance and resistance of components with basic accuracy
of 0.05%. These meters have an adjustable test frequency, from 20 Hz to 500 kHz (894) and
20 Hz to 1 MHz (895). With the vivid 4.3-inch TFT LCD, users can operate and read the
measurements easily. This LCR meter is designed to fit standard 19in racks with a 2U form
factor.
The sweep function provides a quick look at the characteristics of the components, allowing
the customer to systematically test the primary and secondary parameters of those
components using up to 201 frequencies. The BIN comparator function helps quickly sort
components up to 10 bins. With built-in USB, RS-232, LAN and GPIB (895 only), these LCR
meters can be remotely controlled to perform daily operations in production, quality
control and laboratory environments.
Features:
•Basic accuracy 0.05%
•Test frequency from 20 Hz to 500 KHz (894) and 1 MHz (895)
•Frequency sweep function
•Bin sorting comparator
•Adjustable measurement speed for fast readout or better accuracy
•Standard USB, Ethernet, RS-232C and GPIB interface (895 only)
•Save and recall up to 40 internal measurement setups
•4.3” color TFT LCD display
Package Contents
Please inspect the instrument mechanically and electrically upon receiving it. Unpack all
items from the shipping carton, and check for any obvious signs of physical damage that
may have occurred during transportation. Report any damage to the shipping agent
immediately. Save the original packing carton for possible future reshipment. Every
instrument is shipped with the following contents:
1 x Model 894/895 bench LCR meter
1 x AC power cord
1 x 4-wire Kelvin clip test lead
1 x 4-terminal test fixture
1 x Certificate of Calibration
1 x Test Report
1 x Shorting Bar
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

16
Dimensions
Figure 1 - Dimensions
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

17
Front Panel Overview
Figure 2 - Front Panel Overview
Front Panel Description
Power On/Off Switch
Log Key
Cursor
Ground Terminal
Measurement Terminals
Trigger Key
Reset Key
Pass/Fail LED indicators
Numerical Keypad
Menu Keys: MEAS, SETUP and SYSTEM
Softkeys
Copy Key
4.3” TFT Color LCD Display Window
USB Host Port
Auxiliary Keys
Zoom Button
1
4
13
6
7
8
9
14
11
10
15
2
5
12
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

18
Rear Panel Overview
Figure 3 - Rear Panel Overview
Rear Panel Description
AC Power Input Receptacle
Fuse Box
Chassis Ground Terminal
GPIB Interface (895 only)
Handler Interface
RS-232 Interface
USB Interface
LAN Interface
4
5
6
8
7
3
2
1
1
2
3
4
5
6
7
8
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

19
Display Overview
Figure 4 - Display Overview
Display Description
Main Display Field
Displays measurement parameters and results
Menu Functions
Displays measurement settings
Menu Options
Displays menu options
1
2
3
2
1
3
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

20
Getting Started
Before connecting and powering up the instrument, please review and go through the
instructions in this chapter.
Input Power Requirements
Input Power
The instrument has a selectable AC input that accepts line voltage and frequency input
within:
AC Input: 100-120 VAC or 198-242 VAC
Frequency: 47 – 63 Hz
Before connecting to an AC outlet or external power source, be sure that the fuse is the
appropriate for the mains (refer to Fuse Requirements). Also, verify that the AC power cord,
including the extension line, is compatible with the rated voltage/current and that there is
sufficient circuit capacity for the power supply. Once verified, connect the cable firmly.
The included AC power cord is safety certified for this instrument operating in rated range.
To change a cable or add an extension cable, be sure that it can meet the required power
ratings for this instrument. Any misuse with wrong or unsafe cables will void the warranty.
Fuse Requirements
An AC input fuse is necessary when powering the instrument. The fuse is located at the
back of the instrument. In the event the fuse needs to be replaced, make sure the AC input
power cord is disconnected from the instrument before replacing. Refer to the table below
for the fuse requirements with either 115 VAC or 230 VAC.
Before replacing fuse, disconnect AC input power cord first to prevent electric shock.
Only use a fuse of the same rating as required. Using a different rated fuse will damage the
instrument.
Model
Fuse Specification (110 V)
Fuse Specification (220 V)
894
T 4AL, 250 V
T2AL, 250 V
895
T 4AL, 250 V
T2AL, 250 V
Table 1 - Fuse Requirements
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]