Models: 894, 895 500 kHz/1 MHz LCR Meter USER MANUAL
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.
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.
Do not operate the instrument in the presence of flammable gases or vapors, fumes, or finelydivided 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 finelydivided particulates. In relative humidity conditions outside the instrument's specifications.
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.
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.
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.
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.
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.
Contents Product Overview ........................................................................................................... 15 Package Contents ........................................................................................................... 15 Dimensions ..................................................................................................................... 16 Front Panel Overview .............................................................................................
Test Signal Level ............................................................................................................. 30 DC BIAS ........................................................................................................................... 31 Test speed ...................................................................................................................... 32 Digits Resolution ...............................................................................................
High/Low Limits .............................................................................................................. 56 Bin Count Display ........................................................................................................... 58 PARAM ........................................................................................................................... 59 NOM. ...................................................................................................................
Date/Time ...................................................................................................................... 75 LAN Setup ....................................................................................................................... 76 Default Settings and System Reset ................................................................................. 77 File Management ...........................................................................................................
Technical description ...................................................................................................... 99 Handler Operation........................................................................................................ 100 Electrical features ......................................................................................................... 107 HANDLER Interface Board Circuit ................................................................................ 108 Handler ...
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.
Verify that all items above are included in the shipping container. If anything is missing, please contact B&K Precision. Note: User manual is available for download at www.bkprecision.
Front Panel Overview 14 13 12 11 10 9 8 7 15 6 16 2 1 4 Figure 2 - Front Panel Overview Front Panel Description 1 Power On/Off Switch 2 Log Key 3 Cursor 4 Ground Terminal 5 Measurement Terminals 6 Trigger Key 7 Reset Key 8 Pass/Fail LED indicators 9 Numerical Keypad 10 Menu Keys: MEAS, SETUP and SYSTEM 11 Softkeys 12 Copy Key 13 4.
Rear Panel Overview 8 7 6 5 4 1 Figure 3 - Rear Panel Overview Rear Panel Description 1 AC Power Input Receptacle 2 Fuse Box 3 Chassis Ground Terminal 4 GPIB Interface (895 only) 5 Handler Interface 6 RS-232 Interface 7 USB Interface 8 LAN Interface 18 2 3
Display Overview 2 3 1 Figure 4 - Display Overview Display Description 1 2 3 Main Display Field Displays measurement parameters and results Menu Functions Displays measurement settings Menu Options Displays menu options 19
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).
Fuse Replacement - Locate the fuse box next to the AC input connector in the rear panel With a small flat blade screwdriver, insert into the fuse box slit to pull and slide out the fuse box as indicated below. Check and replace fuse if necessary. Fuse box slit Fuse box Check/Remove Fuse Figure 5 - Fuse replacement Leakage current The leakage current should not be larger than 3.5 mA (AC effective value). Preliminary Check Complete the following steps to verify that the instrument is ready for use.
Making Measurements The meter has a 4.3-inch TFT display. The Measurement Display screen is divided into the following zones: 1 3 4 Figure 6 - Measurement Display Fields Measurement Display Fields Description 1. Display page name Indicate the name of the currently displayed page. 2. Soft menu keys Displays on-screen soft keys for navigating soft menu items. 3. Measurement display field Displays measurement results. 4. Information Displays information about signal source and correction.
Measurement Display Menu If the component under test is a capacitor, make sure the capacitor has been fully discharged before connecting it to the instrument. Failing to discharge the capacitor may damage the instrument and may void the warranty. To measure a component, connect it to the test leads or insert it into the test fixture (i.e. the 4wire Kelvin clip test lead or the 1 x 4-terminal text fixture).
Measurement Parameters The Measurement Parameters field lets the user select different settings for the measurement to be taken. Measurement Parameters Primary Measurement Secondary Measurement Figure 8 - Measurement Function Display Test results of the primary and secondary parameters are displayed in two lines. The primary parameter is displayed in the upper line while the secondary parameter is displayed in the lower line.
L2-B* Secondary Inductance Table 2 - Primary Parameters *Used with transformer test fixture TL89T1. Secondary Parameters Parameter Q D Rs Rp X B Θ N, 1/N* M* R2 Description Quality factor Dissipation factor Equivalent Series Resistance (ESR) Equivalent Parallel Resistance Reactance Admittance Phase Angle Turn Ratio and Polarity Mutual Inductance DC Resistance Table 3 - Secondary Parameters *Used with transformer test fixture TL89T1.
X Rp-X Rp-Q N/A N/A N 1/N M R2 N 1/N M R2 R G-B DCR L2A* L2B* Table 5 – Additional Primary Parameter Combinations *Used with transformer test fixture TL89T1. Selecting Primary and Secondary Parameters 1) Move the cursor to select FUNC field , and the following soft keys will be displayed on the screen.
Cs-Q Cs-Rs ← Press the soft key to select the secondary parameter. Then press ← to return to the previous menu. 4) Press Lp—…→ to select Lp as the primary parameter, and the following parameters will be displayed: Lp-D Lp-Q Lp-G Lp-Rp ← Press the soft key to select the secondary parameter. Then press ← to return to the previous menu.
be displayed. Y-d Y-r ← Press the soft key to select the secondary parameter. Then press ← to return to the previous menu. 9) Press R—…→ to select R as the primary parameter, the following parameters will be displayed. R-X Rp-Q Rs-Q ← Press the soft key to select the secondary parameter. Then press ← to return to the previous menu. 10) Press ↓, the following parameters will be shown.
Press the soft key to select the secondary parameter. Then press ← to return to the previous menu. Note: L2A and L2B should be used with transformer test fixture TL89T1. Test range The measurement range should be selected in accordance with the impedance value of the tested LCR component. The 894/895 have 11 AC measurement ranges: 10Ω, 30Ω, 100Ω, 300Ω, 1kΩ, 3kΩ, 10kΩ, 30kΩ, 100kΩ, 300kΩ, and 1MΩ (895 only).
↑(++) This is a coarse adjustment soft key used to increase the frequency. Press this key to change the frequency in the following sequence: 20Hz, 100Hz, 1 kHz, 10 kHz, 100 kHz, 500 KHz (894) and 1 MHz (895). ↑(+) This is a fine adjustment soft key used to increase the frequency. Press this key, to change the frequency between the following values: Hz Hz kHz kHz kHz MHz 20 100 1.0 10 100 1* 25 120 1.2 12 120 30 150 1.5 15 150 *895 only 40 50 60 80 200 250 300 400 500 600 800 2.0 2.5 3.0 4.0 5.0 6.
1 Vrms – 2 Vrms 10 mVrms Table 8 - Voltage Level Resolution The test signal level current range is as follows: Impedance 30 Ω 50 Ω 100 Ω Current Range 166.7 μA to 66.7 mA 100.0 μA to 40.0 mA 50.0 μA to 20.0 mA Table 9 - Current Range vs. Impedance Note: When the test function is set to DCR, the LEVEL field will display “---”. The Auto Level Control function (ALC) can measure constant voltage or current. It can be enabled from the page.
↓(-) - This soft key is used to decrease the output level of DC bias. 1) Use soft keys or numeric keys to set the DC bias source. When using numeric keys, the soft key displays the available units (mV, V, µA, mA and A). You can use them to input the unit after entering the numeric value. If the [ENTER] button is pressed to input bias value, the unit defaults to V or A. Press the [DC BIAS] key on the front panel to enable DC bias output. The [DC BIAS] key will be lid.
Setting Decimal Resolution 1) Move the cursor to MEASUREMENT DISPLAY FIELD (Figure 6) to either the primary measurement or secondary measurement and the following soft keys will be displayed: Decimal Point Auto (D.P. Auto) Decimal Point Hold (D.P. Fix) Decimal Point Position Increment (D.P. POS INCR +) Decimal Point Position Decrement (D.P. POS DECL -) 2) Press DECIMAL AUTO to reset the decimal position of the primary or the secondary parameter test result to its default setting.
Figure 9 - Zoom Correction The user can perform OPEN, SHORT, and LOAD correction used to eliminate stray admittance, residual impedances and other measurement errors. There are two correction methods. Sweep correction: Performs an OPEN/SHORT correction at all pre-set frequency points. Point frequency correction: Performs an OPEN/SHORT/LOAD correction at user-selected frequencies.
Correction Monitoring Zones. Figure 10 – Correction/Correction Menu The Correction Monitoring zones display the results of the load correction function (REF A and B, OPEN A and B, SHORT A and B, LOAD A and B). These are the values that will be used to compensate a measurement after an open, short and load calibration is performed. The correction operation has three modes: 1.
Sweep Correction Open Correction The open correction function can eliminate the errors caused by the stray admittance (G, B) that may exist within the test fixture or leads. Refer to Figure 11. Figure 11 - Stray Admittance Open Correction Procedure 1) Connect the test fixture to the test terminal. Make sure the test fixture is not connected to any DUT and it is “open”. 2) Press the SETUP button and enter the MEASURE SETUP menu.
DCR OPEN: Tests the Open resistance for DCR. The following soft key will be displayed on the top right corner of the display: ABORT: This soft key cancels the current open correction operation. 4) Keep the test fixture open (no connection), then press the softkey MEAS OPEN to execute open calibration. The meter will beep when the correction is completed.
Press the MEASURE SHORT soft key. Full frequency correction takes approximately 75 seconds. The following soft key will be displayed on the top right corner of the display: ABORT: This soft key cancels the current short correction operation. DCR SHORT: Short resistance test for DCR. The following soft key will be displayed on the top right corner of the display: ABORT: This soft key cancels the current short correction operation. 4) 5) Insert the short plate to the test fixture.
Figure 13 - Procedure for Correction at User-Specified Frequencies. 1. Connect the test fixture to the test terminal of the meter. Make sure the test fixture is not connected to any device. 2. Press the SETUP button and enter the MEASURE SETUP menu. 3. Press the softkey, CORRECTION, to enter the Correction menu. 4. Press the ON softkey to enable LOAD correction.
The following softkeys will be displayed: ON: Press this soft key to enable the open/short/load Correction data. OFF: Press the soft key to disable the open/short/load Correction data. MEAS OPEN: Press this soft key to execute open correction at the frequency entered in step number 8. MEAS SHORT: Press this soft key to execute short correction at the specified frequency. MEAS LOAD: Press this soft key to execute the load correction at FREQ selected in step number 8. 9.
results of the standard component will be displayed in LOAD A and LOAD B. 13. Press ON to perform load correction calculation at preset frequencies in later measurements. Cable Length Selection The available cable length is 0m (when using the included 4-terminal test fixture), 1m, and 2m. To select the desired length, please follow the steps below: 1) Press the SETUP button. 2) Press the soft key Correction. 3) In the Correction menu, use the cursor keys to navigate to the Cable option.
𝑍 = 𝑅 + 𝑗𝑋 = |𝑍|∠𝜃 (Ω) 𝑅 = |𝑍| cos 𝜃 X = |𝑍| sin 𝜃 𝑋 |𝑍| = √𝑅 2 + 𝑋 2 𝜃 = tan−1 ( ) 𝑅 𝑍 = 𝐼𝑚𝑝𝑒𝑑𝑎𝑛𝑐𝑒 𝑅 = 𝑅𝑒𝑠𝑖𝑠𝑡𝑎𝑛𝑐𝑒 𝑋 = 𝑅𝑒𝑎𝑐𝑡𝑎𝑛𝑐𝑒 Ω = 𝑂ℎ𝑚 There are two different types of reactance: Inductive (XL) and Capacitive (XC). It can be defined as follows: 𝑋𝐿 = 𝜔𝐿 = 2𝜋𝑓𝐿 𝑋𝐶 = 1 𝜔𝐶 𝐿 = 𝐼𝑛𝑑𝑢𝑐𝑡𝑎𝑛𝑐𝑒 (𝐻) 𝐶 = 𝐶𝑎𝑝𝑎𝑐𝑖𝑡𝑎𝑛𝑐𝑒 (𝐹) 𝑓 = 𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 (𝐻𝑧) 𝜔 = 𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 (𝑟𝑎𝑑⁄𝑠) 1 = 2𝜋𝑓𝐶 For components, the quality factor (Q) serves as a measurement of the reactance purity.
Series and Parallel Models Components are modeled with one of the two following equivalent circuits: XP R X S S RP Series Parallel model Figure 15 - Series and Parallel Models model The impedance for the series model is: 𝑍 = 𝑅𝑠 + 𝑗𝑋𝑠 The impedance for the parallel model is: 1 1 1 = + 𝑍 𝑅𝑃 𝑗𝑋𝑃 These circuit models are mathematically equivalent. The LCR meter measures an impedance, which gives two independent numbers, the magnitude (|Z|) and phase (θ) of the impedance.
frequency would be optimal. For example, if the capacitance of the component is to be in the mF range, then selecting in the range of 20 Hz to 200 Hz for test frequency would give much better results. The results will also be obvious because if the same component was tested with 1 kHz or above, the measured readings may look erroneous on the display. In all cases, it is best to check with the manufacturer’s data sheet in order to determine the best test frequency to use for measurement.
Small Capacitor (High Z) Large Capacitor (Low Z) RP C C Relevant RP Less relevant RS RS Less relevant Relevant Figure 16 - Equivalent Capacitor Circuit Inductance The impedance of an inductor is positively proportional. Therefore, the larger inductances equals to higher impedance and vice versa. Figure 17 shows the equivalent circuit of an inductor. When the inductance is small, the series resistance (RS) becomes more important than the parallel resistance (RP).
Frequency (kHz) 0.1 1 10 100 Capacitors Use series model when > 16 μF > 1.6 μF > 160 nF > 16 nF Inductors Use parallel model when < 16 μF < 1.6 μF < 160 nF < 16 nF Use series model when < 160 mH < 16 mH < 1.6 mH > 160 μH Use parallel model when > 160 mH > 16 mH > 1.6 mH > 160 μH Table 10 - Series/Parallel Model Guideline Measure Setup Menu The Measure Setup page allows the user modify a series of parameters used while performing a measurement.
Current Level Monitor ON/ OFF (Im) Bias Current Isolation ON/ OFF (ISO) Deviation Test Mode A (DEV A) Deviation Test Mode B (DEV B) Deviation Test Reference Value A (REF A) Deviation Test Reference Value B (REF B) In addition, the following parameters can also be set (see section 3.
Auto Level Control (ALC) Auto level control function can adjust the actual test level (voltage across or current through DUT) to the test level value. This function helps ensure a constant test voltage or current. When using this function, the test level can be set within the range below: Constant voltage: 10 mVrms to 1 Vrms Constant current: 100 µArms to 10 mArms NOTE: If the level exceeds above ranges, this function will be automatically disabled.
Note: After bias current isolation function is turned on, the test accuracy will be influenced, so under the condition of low frequency and bias current, the bias current isolation function should be set as OFF. Setting the Bias Current Isolation Function Follow these steps and set the bias current isolation function ON or OFF. 1. In the page, using the cursor keys, move the cursor to the ISO zone, the following soft keys will be displayed: 2.
1) In the page, using the cursor keys, move the cursor to Vm or Im, and the following soft keys will be displayed: ON OFF 2) Press ON to set the voltage or current monitor function ON. 3) Press OFF to set the voltage or current monitor function OFF. NOTE: The selected function can affect the level monitor function. When the correction data changes, the level monitor value will also change.
2) Press any of the softkey to change the output impedance.. Deviation Test Function (DEV A/DEV B) The deviation value is equivalent to the real test value subtracted from the pre-set reference value. This function is useful when observing variations of component parameters. Δy (Absolute Deviation mode) Displays the difference between the test value of the DUT and the preset reference value.
Limit Table Setup The Limit Table Setup allows the user to set the parameters for the Bin Sorting Function. This page allows the user to set the parameters for the built-in comparator. These LCR meters can set nine bin limits of the primary parameters and one of the secondary parameters. The tested result can be divided into up to ten bins (BIN 1 to BIN 9 and BIN OUT).
Nominal value (NOM) Auxiliary bin ON/OFF (AUX) Comparator Function ON/OFF (COM) High/Low limit of each bin (HIGH/LOW) Measurement Parameters (PARAM) For more details on how to set up Test Parameters and the available options go to section 3.2 Measurement Parameters. Swap Parameters This function will swap the primary and the secondary parameter in PARAM. For example, when the measurement parameter is Cp-D, the swap parameter function can change the measurement parameter to D-Cp.
Figure 20 - Tolerance Mode and Sequential Mode Note: When setting limit values of the tolerance mode, the error range should be set in the order from small to large. If the error range of BIN1 is the largest one, then all DUT will sort into BIN 1. Under tolerance mode, the low limit does not need to be smaller than the nominal value and the high limit does not need to be larger than the nominal value. The limit range of each bin can be overlapped. Setting Limit Modes 1) Press SETUP.
value can be set, but it is optional. Setting the Nominal Value 1) Press SETUP. 2) Press LIMIT TABLE to enter into the page. 3) Move the cursor to NOM. 4) Use numeric keys to input nominal value. The following softkeys for the units of the nominal value will become available: p, n, µ, and m Press the → key to access additional units softkeys: k, M, *1 Alternatively, enter a value directly using the numeric keypad, then press ENTER.
3) Using the arrow keys, move the cursor to AUX, the following soft keys will be displayed. ON OFF 4) Press the ON softkey to enable the Aux Bin or, press OFF to turn the Aux Bin off. Comparator Function (COMP) Nine bin limits of the primary parameters and one bin limit of the secondary parameters can be set. The tested results can be sorted into ten bins (BIN 1 to BIN 9 and BIN OUT). This function is especially useful if the handler interface is used. Enabling Compare Function 1) Press SETUP.
Primary and Secondary Parameters. 4) Use the cursor to set the nominal value in the NOM field. 5) Set the limit MODE of the primary parameter (as described in section 4.2 Compare ). Repeat steps 6 to 9 if the Tolerance Mode was selected until the limits of BIN 9 are input. The cursor will automatically move LOW of 2nd or repeat steps 10 to 14 if the Sequential Mode was selected in Step 5. 6) User numeric keys to input low limit value in Low limit.
Bin Sorting Function The following test conditions are displayed in the page. The following cannot be set on this page but can be set in page. Test function (FUNCA) Test frequency (FREQ) Test level (LEVEL) Test range (RANG) Test speed (SPEED) DC BIAS ON/OFF set state of OPEN, SHORT, LOAD (CORR) To set these test conditions, refer to section 3.6 Measure Setup Menu. Press the MEAS key and then the BIN NO. softkey to enter into display page.
Figure 22 - Bin Count Display Go to the page to see the count of each bin: a) Press b) Pres the soft key BIN COUNT The page allows the user to turn the Count function ON or OFF. To enable the Count option: a) While in the menu, press the down arrow in the cursors keys. The softkeys ON or OFF will become available on the top right of the page. b) Press ON to turn on the bin count. PARAM Parameter zone shows the “Function” parameter. NOM.
Setting the Bin Count Function Execute the following operations to set the bin count function ON/OFF on page. 1) On page, move the cursor to COUNT, the following soft keys will be displayed. ON OFF RESET 2) Press the soft key ON to turn on the count function. 3) Press the soft key OFF to turn off the count function. 4) Press the soft key RESET, and the following soft keys will be displayed. YES NO 5) Press the soft key YES to reset all bin counts to 0.
List Sweep Setup The List Sweep Setup page allows the user to configure the List Sweep for up to 201 frequencies, test signal levels, DC bias voltage or DC current source. On page, the following list sweep parameters can be set. Mode (SEQ or STEP) Sweep Parameters (frequency [Hz], level [V], level [A], bias [V], bias [A]) Sweep Test Points (Hz, V, A) Limit Parameter (LMT) High/Low Limit (HIGH, LOW) Delay in Seconds (DELY)Clear Table (No.
Clear Table This option clears the table completely. 2 Mode The meter can automatically sweep up to 201 frequencies, test levels or DC bias. Two sweep modes are available: SEQ and STEP. In SEQ mode, each press of the TRIGGER button will initiate a test of all list sweep test points. In STEP mode, each press of the TRIGGER button test one point at a time of the list sweep. NOTE: When the trigger mode is set to INT, sweep test modes of SEQ and STEP will not be controlled by [TRIGGER].
Delete Line: Clears all the parameters of the line selected Fill Linear: Fills the table linearly between the high value and low value. Fill Log: Fills the table linearly between the high value and low value. Prev Page: Returns to previous page. Next Page: Moves onto the next page. The user can enter the sweep test point values manually if Fill Linear or Fill Log is not selected. The meter will perform the sweep only with the values entered in the field below the Sweep Parameter (i.e.
5 High/Low Limits This zone shows the high and the low limits of the limit list. 6 Delay DLY parameter indicates the delay time from the last measurement of each sweep step to the next sweep measurement.
List Sweep Display Press the menu key [MEAS DISPLAY] and then the soft key LIST SWEEP to enter into the page, shown below: Figure 24 - List Sweep Setup NOTE: When the trigger mode is set to INT, sweep test modes SEQ and STEP will not be controlled by the TRIGGER key. When the trigger mode is set to MAN, [TRIGGER] can be used to trigger the list sweep test and Reset to Stop the sweep and once stopped, it can also reset the sweep.
List Sweep Display Fields No. When the cursor is set in this area, the soft keys will display “PREV PAGE” and “NEXT PAGE”. By pressing any of these two soft keys the user will be able to navigate through the List Sweep Display. FREQ (Hz) This shows the swept frequencies. R[:] X[:] This displays the primary and secondary parameter measurements. CMP (Compare) This indicates the compare results of the swept points. L means the result is lower than the limit and H is higher than the limit.
Running a List Sweep Example Manual trigger can be used to control when to start and stop sweep when trigger source is set to manual (MAN). If the trigger source is set to internal trigger (INT), list sweep will run indefinitely as soon as LIST SWEEP is pressed in the page. 1. Press the setup button. The following screen will be displayed: and navigate to the TRIG field. Press the softkey MAN to select Manual trigger. 2. Trigger has been set to manual.
4. Using the cursors navigate to the MODE and select SEQ. 5. Using the cursors navigate to the parameter to be swept, select the FREQ [Hz] by pressing the softkey. 6. Using the arrow keys, navigate to the frequency fields, then press Fill Linear.
Frequencies filled linearly by pressing the Fill Linear softkey. Use these softkeys to navigate through all the values. 7. Go to the main page by pressing the MEAS button and press the LIST SWEEP softkey.
Press to enter to the List Sweep Display No readings since the trigger was set to manual. 8. Press the [Trigger] button and the sweep will start. To stop, press the [Reset] button once. To restart the sweep, press the [Reset] button twice.
Figure 25 - Frequency Linear Sweep Results 71
System and File Management System Setup Press the System key to enter into the page shown below and modify any of the options shown: Figure 26 - System Setup On this page, the following options can be setup: PASS beep, FAIL beep, language, PASS word, bus mode, GPIB address, TALK only, Bias SRC, baud rate, date/time. NOTE: Press LOG key to save the setup when finished to save the settings of this page.
Operation steps for setting PASS BEEP 1) Move the cursor to PASS BEEP, and the following softkeys will be displayed. HIGH LONG This soft key selects a long, high tone beep. HIGH SHORT This soft key selects a short, high tone beep. LOW LONG This soft key selects a long, low tone beep. TWO SHORT This soft key selects two short, low tone beeps. OFF This soft key disables the pass beep function.
Password This configures the password–protection mode. 1) Move the cursor to PASSWORD, and the following soft keys will be displayed. OFF This soft key disables the password protection mode. Hold SYSTEM This soft key enables the password protection mode including file protection and boot up password. Hold FILE This soft key sets protection to user’s file. MODIFY This soft key is used to change the password.
Talk Only The Talk only function configures the instrument to send each measurement result to bus through the remote interfaces. When it is ON, the instrument cannot be controlled by a remote PC. 1) Move the cursor to TALK ONLY, the following soft keys will be displayed. ON OFF 2) Press ON to turn on the talk only function or OFF to turn off this function. Bias SRC Bias source is used to select the DC bias power.
LAN Setup Follow the instructions below to select the Ethernet interface and configure it for remote operation. 1. Press the SYSTEM button and you will see the following options: Figure 27 - LAN Setup 2. Press the LAN SETUP button. 3. To turn on the AUTO IP (or off) and the DCHP options, using the arrows, move the cursor to the AUTO IP (or DCHP) field and using the soft menu keys press the ON option. AUTO IP field will display whether that option is turned on or off. 4.
Default Settings and System Reset In the menu, the softkeys to the right of the screen allow the customer to set the unit to Default Settings or perform a System Reset. Press the Default Settings soft button to set all the settings of the System Setup menu to their factory default values. Press the System Reset soft button to reset the instrument. File Management The LCR meters have built-in non-volatile memory for storing and recalling instrument settings. Most measurement menus, (i.e.
Setup file (*.STA) 40 user setup files (*.STA file) can be saved and recalled to and from the instrument. In addition, users can use an external USB Flash drive (U-disk) to save/recall up to 500 setup files.
Saving Settings to File 1. Configure the settings to be saved (see above list of settings saved for each page). 2. Move the cursor to FILE MANAGE from any of the pages with that menu available (i.e. Meas Display, Measure Setup, etc.), and the following soft keys will be displayed. LOAD SAVE DEL FIND COPY TO E: 3. In the file list (under the LCR ID label) move the cursor to the file-saved position or input the file number directly. Figure 29 - LCR Files List 4.
Load setting following these steps 1. 2. Press FILE MANAGE, the LCR File List and the following soft keys will be displayed. LOAD SAVE DEL FIND COPY TO E: In the file list (under the LCR ID label, see Figure 29), move the cursor to the file-saved position or input the file number directly. 3. Press LOAD, and the following soft keys will be displayed. Yes No 4. Press No to cancel the current load operation and return to step 1. 5. Press Yes to load the currently selected file.
6. Input the name and then press the [ENTER] to search the target file or input the page number and press the [ENTER] to search the file. Save Screenshot To take a screenshot of the LCD screen, follow these instructions: 1. 2. 3. 4. Insert a USB drive into the front USB host port. Press the [Copy] button. The unit will automatically create a folder on the USB drive with the name PIC. The screenshot will be saved to the folder mentioned above.
Specifications Note: All specifications apply to the unit after: Temperature Stabilization time: 30 mins Operating Temperature: 23 °C ± 5 °C Specifications are subject to change without notice. Test Signal Frequency Minimum resolution Model Range 894 20 Hz - 500 kHz 895 20 Hz - 1 MHz 0.
Resolution 0. 1 µA *Auto Level Control 1: Resolution and impedance see AC source (ALC OFF) specification Measurements L, C, R, G, X, Z, Y, B, θ, Q, D, DCR Measurement parameters Transformer measurement parameters2 Basic accuracy AC source Output impedance (± 2%) Typical Fast measurement time Medium (≥10 kHz) (excluding display Slow refresh time) Equivalent circuit L2A, L2B, N, 1/N, M 0.
General External USB memory Save / recall setups, screenshots, measurements and sweep data logs Remote interface Handler interface USB (USBTMC or virtual COM), RS232, LAN, GPIB (895 only) 36-pin connector 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.
Basic Accuracy A Note: The accuracies apply to the unit after: Correction after warming up: Test Cable Length: Speed: DC Bias: Range: AC Test Signal Level = OPEN and SHORT 0m Slow/Medium Off Auto 0.
Figure 30 depicts the basic accuracy using low or medium measurement speed. Whenever a values falls on a range line use the larger accuracy value. Measurements tend to be less accurate when high speed measurements are performed. When selecting fast measurements speed, multiply by 2 the accuracy shown above.
Level Correction Factor AL Vs = Test signal voltage (Vrms) [5 m, 50 m] (50 m, 200 m) (200 m, 500 m) (500 m, 1) (1, 2] Level Correction Factor (AL) 2.5 × 50 mVrms / Vs 2.5 500 mVrms / Vs 1 2 Table 12 - Level Correction Factor (AL) The figure below shows the correction level factor (AL) graphically. Figure 31 – Correction Level Factor – AL Impedance Rate Factors: Ka and Kb Ka or Kb will be used depending on the impedance of the device under test. Only one of these two factors will be used at a time.
1103 200 100 ( )(1 ) Zm Vs fm Fm 1.2 kHz Medium Slow 1.2 kHz fm ≤ 8 kHz 8 kHz fm ≤ 150 kHz 3 110 200 ( )(1 ) Zm Vs 150 kHz fm ≤ 1 MHz 1103 200 ( )(3 ) Zm Vs Fm 1.2 kHz 2.5 103 400 100 ( )(1 ) Zm Vs fm 1.2 kHz fm ≤ 8 kHz Fast 8 kHz fm ≤ 150 kHz 150 kHz fm ≤ 1 MHz 2.5 10 3 400 ( )(1 ) Zm Vs 2.5 10 3 400 ( )(2 ) Zm Vs Z m (0.3 109 )(1 70 100 ) Vs fm Z m (1109 )(1 70 ) Vs Z m (3 109 )(1 70 ) Vs Z m (10 109 )(1 Z m (0.
Kb Compensation Determine the Kb compensation and multiply it by the Kb value obtained from the table above, the result will be the new Kb and it is this value what should be used in the accuracy calculation: Cable length L [m] Fm ≤ 100 kHz 100 kHz < fm ≤ 300 kHz 300 kHz < fm ≤ 1 MHz 0 1 1 1 1 1+5×fm 1+2×fm 1+0.5×fm 2 1+10×fm 1+4×fm 1+1×fm Table 15 - Cable Length Extended - Kb Compensation (Impendace Zm >500 ohms) Where, fm is the test frequency and the unit is [MHz].
Temperature Factor: Ke Temperature (℃) Ke 0 - 18 4 18 - 28 1 28 - 40 4 Table 18 - Temperature Factor Ke Accuracy of D When Dx (tested value of D) ≤ 0.1, the accuracy of De is given by the formula below: De = Ae 100 When Dx > 0.1, De should be multiplied by (1+Dx). Accuracy of Q The accuracy of Q is given by the formula below: Q e = Qx De 1 Qx D e Where, Qx is the value of the tested Q. De is the accuracy of D. Above formula should be used when Qx×De < 1.
Accuracy of Rp When Dx (value of tested D) ≤ 0.1 the accuracy of Rp is given by the formula below: Rp = Rpx De Dx De [Ω] Where, Rpx is the value of tested Rp with the unit [S]. Dx is the value of test D with the unit [F]. De is the accuracy of D. Accuracy of Rs When Dx (value of tested D) ≤0.1 The accuracy of Rs is given by the formula below: Rse = Xx×De [Ω] Xx = 2πfLx, for inductance. Xx= 1 , for capacitance. 2fCx Where, Xx is the value of test X with the unit [S].
Accuracy Calculation Examples Example 1 Standard Capacitor Value: 10.004 nF @ 1 KHz Measured value: 10.0046 nF @1 KHz Dissipation Factor “D”: 0.00044 Test Signal Level: 1 V Speed: Slow Cable Length= 0 (no compensation needed) D < 0.1 then: Ae is NOT multiplied by √1 + 𝐷𝑥2 Ae = Capacitance Accuracy = ± [(AL× A) + (Ka+Kb+Kc)× 100 + Kd + Kf] × Ke [%] Factor Reason AL=1 Test voltage level was 1 Volt, according to the Table 12 of manual the correction factor for this voltage level is 1. A = 0.
See Table 16 and Table 17. Kd= 0 L=0, therefore, Kd=0. Ke= 1 Room temperature during test= 20o. Temperature Factor =1. See Table 18. Kf = 0 Fixture no available for this unit. Ae = ± [AL× A+（Ka+Kb+Kc）×100+ Kd]×Ke [%] 𝐴𝑒 = ±[(1𝑥0.05) + (0 + 0.00010713525 + 0)x100 + 0] x 1 = ±0.06074%=0.0006074 Finding the valid range: ±0.06074% x 10.004 nF = 6.073977E-12 10.004nF + 6.073977E-12= 10.0105 nF 10.004nF - 6.073977E-12= 9.9983 nF Valid range of measurements= [10.0105 nF, 9.9983 nF] The 895 with measured 10.
Ka= 0.00053995862 1 103 200 100 )(1 ) Ka = ( Zm Vs fm Ka is chosen because impedance is less than 500 Ohms. Zm= Impedance of the DUT = 159.069 Ohms fm= 100 KHz (test frequency) Vs= 1 (voltage test signal) 1𝑥10−3 100 Ka = (159.069) (1+200/1)(√(100,000) Ka = 0.00003995862, but since we are using a 1 meter long testing fixture, Ka needs to be compensated. (table 15) Ka (new)= 0.00003995862+0.0005=0.
The 895 with measured 10.0054 nF which falls under the accepted range. Note how the first example is more accurate and the reason is because the test fixture does not use a cable (cable length =0) and it is done using a frequency with a better accuracy for that capacitor size.
Remote Interface The instrument has RS232, USB (virtual COM), LAN, and GPIB (895 only) interfaces for remote control. This chapter will describe how users can remotely operate the instrument and use SCPI (Standard Commands for Programmable Instruments) commands via these interfaces. Interface Configuration For more information on how to set up this interface, refer to 8.1 , Bus Mode. RS-232 For RS-232 connectivity, refer to the diagram below for the pinout information.
Parameter Description Baud rate Parity and data bit Stop bit Flow control 9600, 19200, 28800, 38400, 48000, 57600, and 115200. None/8 bits, Even/8 bits, Odd/8 bits 1, 2 None Table 19 - RS-232C Settings The RS-232 interface does not support hardware flow control (only transmit, receive, and ground pins are used). The programmer should be aware of this limitation and notice the command process time of the LCR meter.
GPIB (895 Only) The GPIB address of the LCR meter can be configured from 1-31. To communicate via GPIB, connect a GPIB cable to the GPIB port at the back of the LCR meter. Refer 8.1, GPIB ADDR (895 only), for more information. Remote Commands The instrument supports some SCPI commands and some instrument specific commands. These commands enable a computer to remotely communicate and control the instrument over any of the supported remote interfaces: USBTMC, RS-232, LAN, and GPIB (895 only).
Handler Interface The 894 and 895 are equipped with a Handler Interface. This interface allows users to fully automate component sorting, inspection and quality control to increase the efficiency of sorting process. The Handler Interface can output a signal to indicate the completion of a task and allows an external trigger to trigger the instrument. Technical description The following table shows the description for 894/895 HANDLER.
Handler Operation The definition for the signal line The Handler interface has 3 signal lines: comparison output, control output and control input.
16 17 18 +5V Internal +5V: It is not recommended to use the internal +5 V. If this voltage output is used, the current should be lower than 0.3 A, and that the signal line is far from a disturbance source. 19 /PHI Indicates that the test result is greater than the high limit set on BIN1 to BIN9. 20 /PLO The main parameter is lower than the lower limit in BIN1 to BIN9. 21 /SREJ The test result is outside the valid range. NC Not connection.
Figure 32 - Signal Distribution for BIN Comparison Figure 33 - Handler's Pinout Note: In the List Sweep Comparator the signals for /BIN1 - /BIN9, /OUT, /AUX, /PHI, /PLO and /SREJ are different from those of the BIN Comparison function.
1st measurement nd 2 Measurement Figure 34 -Handler Interface Timing Notes: Measurement time: Refer to the Typical comparison time is approximately 1 ms. Display time for every display page is: MEAS DISPLAY: 8ms; BIN NO.DISPLAY: 5ms; BIN COUNT DISPLAY: 0.
List Sweep Comparison Signals The List Sweep Comparison signal output is different from other modes, including Bin Comparison: List Sweep Comparison Output Signal /BIN1-/BIN9 and /OUT show the IN (good) or /OUT (over the standard) result. /AUX shows PASS/FAIL result. When a sweep test is finished, these signals will be at the output signal. Control Output Signal /INDEX (Analog test finished) /EOM (End of measurement).
30 /INDEX 31 /EOM Rest of pins SEQ: When the analog test of the last sweep point is finished and the UNKNOWN terminal can be connected to another DUT, /INDEX is asserted. However, the comparison signal is asserted until /EOM is also asserted. STEP: When the analog test at each sweep point is finished, /INDEX is asserted, but the comparison signal is asserted until the line /EOM is also asserted.
*Notes: 1. Setting time, delay time, test time and comparison and display time are not to scale. 2. The setting time includes the correction ON/OFF time. 3. The comparison and display time is 4.5ms approximately.
Electrical features As shown in the previous section, the signal assignment and functions of most pins are different for the comparison and the list sweep comparison. However, the electrical features are the same. Therefore, the following description can be applied to BIN comparison and List Sweep comparison. There is DC isolation on the output on pins 1 to pin 16 generated by a collector-open optoelectronic coupler.
HANDLER Interface Board Circuit The output circuit for the Comparison result output is shown in the figure below: Figure 37 - Output Circuit for the Comparison Results 108
Figure 38 - Output Circuit for Control Signal 109
Figure 39 - Input Circuit for Control Signal Handler Operation The following procedure will show how to use the Handler Interface Comparison and the List Sweep Comparison. The procedure to set the Handler Interface Comparison is detailed below: 1. Press the softkey [LIMIT TABLE]. The LIMIT TABLE SETUP page will be displayed. 2. Set the standard value and the high limit and the low limit in LIMIT TABLE SETUP. 3. Move the cursor to COMP field. The softkey area will display : ON OFF 4.
1. Press LIST SETUP. The LIST SWEEP SETUP page will be displayed. 2. Set the parameters for the sweep mode: sweep frequency point, reference value, the high limits and the low limits. 3. Press [MEAS]. 4. Press the softkey LIST SWEEP, LIST SWEEP DISP page will be displayed. The following method can be used to improve the speed: 1. Set the range to the maximum that the capacitance may be, and lock this range. 2. Set Vm: OFF and Im: OFF in the MEAS SETUP page. 3. Test the DUT in the BIN COUNT page.
Troubleshooting Guide Below are some frequently asked questions and answers. Please check if any apply to your instrument before contacting B&K Precision. Q: I cannot power up the instrument - Check that the power cord is securely connected to the AC input and there is live power from your electrical AC outlet. - Check and confirm that the correct fuse is inserted and not blown. - Verify that the AC power coming from the mains is the correct voltage.
SERVICE INFORMATION Warranty Service: Please go to the support and service section on our website at bkprecision.com to obtain a RMA #. Return the product in the original packaging with proof of purchase to the address below. Clearly state on the RMA the performance problem and return any leads, probes, connectors and accessories that you are using with the device. Non-Warranty Service: Please go to the support and service section on our website at bkprecision.com to obtain a RMA #.
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.
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