894,895 Datasheet by B&K Precision

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Data Sheet
500 kHz / 1 MHz Precision LCR Meter
Models 894 & 895
Technical data subject to change
© B&K Precision Corp. 2018 www.bkprecision.com
Industry-Leading Performance
The 894 and 895 are high accuracy LCR meters
capable of measuring inductance, capacitance,
and resistance of components and materials at
DC or from 20 Hz to 500 kHz or 1 MHz
respectively. These LCR meters provide flexible
AC and DC test signal configuration. AC test
signal voltage is variable from 5 mVrms to
2 Vrms, the AC current is adjustable up to
66.7 mArms, depending on the AC impedance
selected, and a DC bias signal can be added. The
vivid 4.3-inch TFT LCD offers a clear view of all
measured and setting values along with BIN
sorting comparator results and a handy Zoom
feature that enlarges the measured values to full
screen. With a basic accuracy of 0.05%, auto
level control (ALC), open / short / load correction
and cable length compensation, these meter are
perfect tools for R&D, manufacturing and quality
control applications.
Features & Benefits
n AC test signal voltage adjustable up to 2 Vrms
n 3 AC current ranges, selectable via 30 Ω,
50 Ω or 100 Ω internal AC impedance. The
30 Ω setting provides up to 66.7 mArms of
drive current, sufficient for larger inductors
and transformers.
n Built-in DC bias source adjustable from
-5V to +5V / -50 mA to +50 mA
n Fast measurement speed up to 13 ms/reading
to increase manufacturing throughput
n Adjustable measurement speed for fast readout
or better accuracy
n 201-point programmable list sweep function
providing ability to sweep frequency, AC
and DC bias voltage/current levels
n Auto-level control to maintain the
measurement signal applied to the DUT at a
constant level
n Test signal voltage and current monitoring
n BIN comparator function to sort components
in up to 10 bin locations
n Handler interface for easy integration with a
component handler
n 1 m and 2 m cable compensation
n 4-terminal fixture and Kelvin clip test leads
n Transformer test function with optional
transformer test fixture TL89T1
n Versatile trigger functionality (internal,
external, bus and manual)
n Standard USB, LAN, and GPIB (895 only)
interface for remote control using SCPI
DC Biasing
Both the 894 and 895 feature a DC bias source
which allows the meter to apply a DC signal
to the device under test to simulate in-circuit
DC biasing is commonly used to measure
capacitance of ceramic, MLCC, polyester and
other capacitors with high dielectric constants.
These type of capacitors exhibit a significant
change in capacitance with a DC voltage applied.
By controlling the DC voltage, users can obtain
a more deterministic measurement result. Other
applications include evaluation of
cored-inductors and junction capacitance of
semiconductor devices.
The DC bias source is adjustable from -5V to +5V
/ -50 mA to +50 mA. Additionally the voltage
or current levels can be swept while logging the
resulting capacitance.
Model 894 895
Measurement parameters L, C, R, G, X, Z, Y, B, θ, Q, D, DCR
Basic accuracy 0.05%
DCR measurement range 0.01 Ω - 100 MΩ
Test frequency range 20 Hz - 500 kHz 20 Hz - 1 MHz
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500 kHz / 1 MHz Precision LCR Meter
Models 894 & 895
Front panel
USB host port
Connect your USB flash drive
to conveniently save and recall
measurement data logs, settings, and
Variable test signals
The instrument provides settable
voltage levels from 5 mVrms to 2 Vrms
to evaluate your DUT.
Intuitive user interface
Easily change test parameters using the
menu-driven front panel keypad.
4.3” TFT high
resolution color
Pass/Fail LED
Rear panel
GPIB interface
(Model 895 only)
Handler interface
36-pin connector to interface with component handler via input/output control signals.
Includes bin and list sweep comparator results and end of measurement (EOM) indicator
output signals, external trigger, and key lock input signal.
interface AC input
Zoom display mode
Enlarge the displayed values for easy
viewing with a touch of a button. The
voltage and current across the DUT are
also monitored in zoom display mode.
DC bias
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500 kHz / 1 MHz Precision LCR Meter
Models 894 & 895
Use the built-in linear and logarithmic sweep
function, supporting up to 201 sweep points, to
conveniently display, analyze and store
primary and secondary parameters of a
component. Sweep test frequency, AC source
voltage and current levels, DC bias source
voltage and current levels. A delay can be
programmed after each sweep point. The list
sweep can be triggered internally, manually or
externally and executed in sequence or step
Programmable List sweep
Quickly sort components using the instrument’s 9
primary BINs, a secondary BIN and
out-of-specification BIN. The results can be
displayed in a table on-screen or output via
the handler interface. High and low limits for
each bin can be set up in absolute, tolerance or
sequential mode with Pass/Fail indicator.
Bin sorting function
Integrate your LCR meter into an automated test
system and control it from a PC using SCPI
commands via the RS232, USB, LAN, or
GPIB (895 only) interface.
Remote PC control
Flexible test accessories
Standard accessories shipped with each unit are Kelvin clip test leads for 4-wire measurements, a test fixture, and shorting bar. The optional transformer test
fixture allows users to measure transformer parameters.
Kelvin clips (TL89K1)
Transformer test fixture (TL89T1)
Test fixture (TL89F2)
Shorting bar (TLBSB)
Transformer measurements (optional)
Diagram showing the TL89T1 connected to a
transformer under test.
Using optional test fixture TL89T1, the 894
and 895 can test the primary and secondary
inductance L1, L2, turn ratio (N, 1/N), mutual
inductance (M), and primary and secondary
direct-current resistance (R2) of a transformer
directly. Additionally, the two common
transformer parameters winding equivalent
capacitance Co and leakage inductance Lk can
be characterized indirectly.
Powerful Features
Included Optional
SMD test fixture (TL89S1)
500 kHz / 1 MHz Precision LCR Meter
Models 894 & 895
4 www.bkprecision.com
Test Signal Frequency
Model Range Minimum resolution Accuracy
894 20 Hz - 500 kHz 0.01 Hz 0.01 %
895 20 Hz - 1 MHz
Cable length compensation 0, 1, & 2 meters
Math operations Direct reading, ABS, %
Trigger mode Internal, Manual, External, Bus
Delay time setup Time from trigger to start: 0 to 60 seconds
Resolution: 1 ms
(Bin sorting)
10-bin sorting, primary bins BIN1-BIN9 and OUT,
secondary bin AUX
Bin counter: 0 to 999,999
PASS/FAIL indication via front panel LED or
handler interface signal
Test Signal Levels
AC source (ALC* OFF)
Voltage Accuracy 10% x set voltage ± 2mV
Voltage Level Resolution
5 mVrms - 100 mVrms 100 µVrms
100 mVrms - 1 Vrms 1 mVrms
1 Vrms - 2 Vrms 10 mVrms
Current Accuracy 10 % x set current ± 10 µA
Current Range Impedance
166.7 µArms - 66.7 mArms 30 Ω
100.0 µArms - 40.0 mArms 50 Ω
50.0 µArms - 20.0 mArms 100 Ω
AC source (ALC* ON)1
Voltage Range 10 mVrms – 1 Vrms
Accuracy 6% x set voltage ± 2 mV
Current Range 100 µArms - 10 mArms
Accuracy 6 % x set current ± 10 µA
DC bias source
Range -5 V to +5 V
Accuracy 1 % x set voltage ± 5 mV
Resolution 0.01 mV
Range -50 mA to +50 mA
Accuracy 1 % x set current ± 50 µA
Resolution 0. 1 µA
*Auto Level Control
1: Resolution and impedance see AC source (ALC OFF) specification
Measurement parameters L, C, R, G, X, Z, Y, B, θ, Q, D, DCR
Transformer measurement parameters2L2A, L2B, N, 1/N, M
Basic accuracy 0.05 %
AC source Output
impedance (± 2%) 30 Ω, 50 Ω, 100 Ω
Typical measurement time
(≥10 kHz)
(excluding display refresh
Fast 13 ms / measurement
Medium 67 ms / measurement
Slow 187 ms / measurement
Equivalent circuit Series, Parallel
Range mode Auto, Hold
Averaging 1-255 measurements
Correction function Open, Short and Load correction
List sweep
201 sweep
Sweep test frequency, test signal AC voltage, test signal
AC current, test signal DC bias voltage and test signal
DC bias current
parameters Primary and secondary
Sweep modes Linear or logarithmic
Trigger mode Sequential and Step
Comparator One pair of lower and upper limits for primary or
secondary parameter (user selectable)
Internal non-volatile
memory Save / recall 40 setups
External USB memory Save / recall setups, screenshots, measurements and
sweep data logs
Remote interface USB (USBTMC or virtual COM), RS232, LAN,
GPIB (895 only)
Handler interface 36-pin connector
AC input Voltage 110/220 VAC ±10%
Frequency 47 – 63 Hz
Power consumption Max. 80 VA
Operating temperature 0 °C to 40 °C
Storage temperature -10 °C to 70 °C
Relative humidity Up to 80%
Display 4.3” TFT color display
Dimensions (WxHxD)
without bezel: 280 mm × 88 mm × 370 mm
(11.02“ x 3.46” x 14.56”)
with bezel: 369 mm × 108 mm × 408 mm
(14.52” x 4.25” x 16.06”)
Weight 5 kg (11 lbs)
Safety EN61010-1:2001, EU Low Voltage Directive 2006/95/EC
Compatibility Meets EMC Directive 2004/108/EC, EN61326-1:2006
Three-Year Warranty
Standard accessories
AC power cord, 4-wire Kelvin clip test lead, 4-terminal
test fixture, shorting bar, certificate of calibration,
test report
Optional accessories Transformer test fixture TL89T1
Valid after 30 minutes of warm up time, operating at 23 °C ± 5 °C
2: Requires optional fixture TL89T1
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500 kHz / 1 MHz Precision LCR Meter
Models 894 & 895
Measurement Accuracy
The chart below depicts the basic measurement accuracy under the following conditions: AC test signal level 0.5 Vrms or 1 Vrms, measurement speed Slow
or Medium, cable length 0 m, DC bias OFF, Dx 0.1 or Qx 0.1 respectively. When selecting measurement speed Fast, double the accuracy value obtained
from the chart.
For more detailed measurement accuracy specifications and other test conditions, refer to the user manual.
DCR Accuracy: A(1 + Rx / 5 MΩ + 16 mΩ / Rx)[%] ±0.2 mΩ A=0.25 for slow & medium speed, A=0.5 for fast speed

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