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Related Manuals for BK Precision 894
Summary of Contents for BK Precision 894
- Page 1 Models: 894, 895 500 kHz/1 MHz LCR Meter USER MANUAL GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 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.
- Page 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.
- Page 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.
- Page 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.
- Page 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.
- Page 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.
- Page 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...
- Page 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.
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Page 10: Table Of Contents
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 .................... - Page 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 ....................
- Page 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 .......................
- Page 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 ....................
- Page 14 Technical description ...................... 99 Handler Operation ......................100 Electrical features ......................107 HANDLER Interface Board Circuit ................108 Handler ......................... 110 Operation ........................110 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 15: Product Overview
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. -
Page 16: Dimensions
Dimensions Figure 1 - Dimensions GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com... -
Page 17: Front Panel Overview
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”... -
Page 18: Rear Panel Overview
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 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com... -
Page 19: Display Overview
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 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com... -
Page 20: Input Power Requirements
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 –... -
Page 21: Fuse Replacement
ON position to turn ON the instrument. The instrument will have a boot screen while loading, after which the main screen will be displayed. Safety Requirements The 894/895 are CAT I safety rated. C~40 C, relative humidity ≤75%). - Page 22 Making Measurements The meter has a 4.3-inch TFT display. The Measurement Display screen is divided into the following zones: Figure 6 - Measurement Display Fields Measurement Display Fields Description 1. Display page name Indicate the name of the currently displayed page. 2.
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Page 23: Measurement Display Menu
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 4- wire Kelvin clip test lead or the 1 x 4-terminal text fixture). -
Page 24: Measurement Parameters
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. -
Page 25: Secondary Parameters
L2-B* Secondary Inductance Table 2 - Primary Parameters *Used with transformer test fixture TL89T1. Secondary Parameters Parameter Description Quality factor Dissipation factor Equivalent Series Resistance (ESR) Equivalent Parallel Resistance Reactance Admittance Θ Phase Angle N, 1/N* Turn Ratio and Polarity Mutual Inductance DC Resistance Table 3 - Secondary Parameters... -
Page 26: Selecting Primary And Secondary Parameters
Rp-X Rp-Q 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. - Page 27 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: ...
- Page 28 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.
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Page 29: Test Range
2) Use the soft keys to set measurement range. Test frequency The frequency range of the 894 meter ranges from 20Hz to 500 KHz, and up to 1 MHz for 895. Note: When the test function is set to DCR, the FREQ field will display “---”. -
Page 30: Test Signal Level
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... -
Page 31: Dc Bias
1 Vrms – 2 Vrms 10 mVrms Table 8 - Voltage Level Resolution The test signal level current range is as follows: Impedance Current Range 30 Ω 166.7 μA to 66.7 mA 50 Ω 100.0 μA to 40.0 mA 100 Ω 50.0 μA to 20.0 mA Table 9 - Current Range vs. -
Page 32: Test Speed
Use the soft keys to select the test speed. Digits Resolution The measurement results of the meter can display up to 6 floating-point digits. The 894 and 895 can be manually configured to display a fixed number of digits or automatically select the number of digits based on range. -
Page 33: Zoom
Changing the deviation test mode (ΔABS, Δ%, OFF) in deviation test mode. Zoom The 894/895 LCR meters let the user enlarge the display size of the measurement results. Press once the Zoom button to enlarge the measurement results display and press it once more to return normal view. -
Page 34: Correction
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. - Page 35 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.
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Page 36: Sweep Correction
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. -
Page 37: Short Correction
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. -
Page 38: Load Correction (Point-Frequency Correction)
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: ... - Page 39 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.
- Page 40 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.
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Page 41: Cable Length Selection
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. - Page 42 �� = �� + ���� = | �� | �� (Ω) ∠ �� = | �� | cos �� X = | �� | sin �� �� −1 | �� | = √�� + �� �� = tan �� �� = ������������������ ��...
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Page 43: Series And Parallel Models
Series and Parallel Models Components are modeled with one of the two following equivalent circuits: Series Parallel model model Figure 15 - Series and Parallel Models The impedance for the series model is: �� = �� + ���� �� �� The impedance for the parallel model is: ��... -
Page 44: Choosing A Measurement Circuit Model
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. - Page 45 Small Capacitor Large Capacitor (High Z) (Low Z) Relevant Less relevant 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.
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Page 46: Measure Setup Menu
Frequency Capacitors Inductors (kHz) Use series Use series parallel parallel model model model model when when when when > 16 μF < 16 μF < 160 mH > 160 mH > 1.6 μF < 1.6 μF < 16 mH > 16 mH >... -
Page 47: Trigger Mode (Trig)
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 3.2 for detailed description): ... -
Page 48: Auto Level Control (Alc)
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 mV to 1 V Constant current: 100 µA... -
Page 49: Average (Avg)
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. -
Page 50: Delay Time (Delay)
1) In the <MEASURE SETUP> 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. -
Page 51: Deviation Test Function (Dev A/Dev B)
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. ... - Page 52 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).
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Page 53: Measurement Parameters (Param)
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. -
Page 54: Tolerance Mode
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. -
Page 55: Auxiliary Bin (Aux)
value can be set, but it is optional Setting the Nominal Value 1) Press SETUP. 2) Press LIMIT TABLE to enter into the <LIMIT TABLE SETUP> page. 3) Move the cursor to NOM. 4) Use numeric keys to input nominal value. ... -
Page 56: Comparator Function (Comp)
3) Using the arrow keys, move the cursor to AUX, the following soft keys will be displayed. 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. - Page 57 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.
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Page 58: Bin Count Display
Bin Sorting Function The following test conditions are displayed in the <BIN No. Disp> page. The following cannot be set on this page but can be set in <MEAS SETUP> page. Test function (FUNCA) Test frequency (FREQ) Test level (LEVEL) ... -
Page 59: Param
Figure 22 - Bin Count Display Go to the <BIN COUNT DISP> page to see the count of each bin: a) Press <MEAS DISP> b) Pres the soft key BIN COUNT The <BIN COUNT DISP> page allows the user to turn the Count function ON or OFF. To enable the Count option: a) While in the <BIN COUNT DISP>... -
Page 60: Bin
Setting the Bin Count Function Execute the following operations to set the bin count function ON/OFF on <BIN COUNT DISP> page. 1) On <BIN COUNT DISP> page, move the cursor to COUNT, the following soft keys will be displayed. ON ... - Page 61 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 <LIST SWEEP SETUP> page, the following list sweep parameters can be set. ...
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Page 62: Mode
Clear Table This option clears the table completely. 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. -
Page 63: Limit Parameters
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. ... -
Page 64: High/Low Limits
High/Low Limits This zone shows the high and the low limits of the limit list. Delay DLY parameter indicates the delay time from the last measurement of each sweep step to the next sweep measurement. GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com... - Page 65 List Sweep Display Press the menu key [MEAS DISPLAY] and then the soft key LIST SWEEP to enter into the <LIST SWEEP DISP> 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.
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Page 66: List Sweep Display Fields
List Sweep Display Fields 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. -
Page 67: Running A List Sweep Example
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 <MEAS DISP>... - Page 68 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. GlobalTestSupply www.
- Page 69 Frequencies filled linearly by Use these softkeys to navigate pressing the Fill Linear softkey. through all the values. 7. Go to the main page by pressing the MEAS button and press the LIST SWEEP softkey. GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 70 Press to enter to the No readings since the trigger was set to manual. List Sweep Display 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. The results of a frequency linear sweep of the primary and secondary parameters R and X are shown below: GlobalTestSupply...
- Page 71 Figure 25 - Frequency Linear Sweep Results GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 72: System Setup
System and File Management System Setup Press the System key to enter into the <SYSTEM SETUP> 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. -
Page 73: Fail Beep
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. ... -
Page 74: Password
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. -
Page 75: Talk Only
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 1) Move the cursor to TALK ONLY, the following soft keys will be displayed. ... -
Page 76: Lan Setup
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. -
Page 77: Default Settings And System Reset
Default Settings and System Reset In the <System Setup> 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. -
Page 78: Setup File (*.Sta)
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. The settings stored in each Setup File are listed below: ... - Page 79 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. ...
- Page 80 Load setting following these steps 1. Press FILE MANAGE, the LCR File List and the following soft keys will be displayed. LOAD SAVE DEL FIND COPY TO E: 2. 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.
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Page 81: Save Screenshot
3. Press the [Log] button to start saving measurements. The 894/895 will create a folder labeled CSV inside the USB drive. Inside of it, it will also create a .csv file and will start saving measurements to it. The name of the .csv file will include the date and the file number saved in that date. - Page 82 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 Model Range Accuracy resolution 20 Hz - 500 kHz 0.01 Hz 0.01 % 20 Hz - 1 MHz...
- Page 83 Resolution 0. 1 µA *Auto Level Control 1: Resolution and impedance see AC source (ALC OFF) specification Measurements Measurement L, C, R, G, X, Z, Y, B, θ, Q, D, DCR parameters Transformer measurement L2A, L2B, N, 1/N, M parameters Basic accuracy 0.05 % AC source Output impedance...
- Page 84 General Save / recall setups, screenshots, measurements and sweep data logs External USB memory USB (USBTMC or virtual COM), RS232, LAN, GPIB (895 only) Remote interface Handler interface 36-pin connector Voltage 110/220 VAC ±10% input Frequency 47 – 63 Hz Power consumption Max.
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Page 85: Basic Accuracy A
Basic Accuracy A Note: The accuracies apply to the unit after: Correction after warming up: OPEN and SHORT Test Cable Length: Speed: Slow/Medium DC Bias: Range: Auto AC Test Signal Level = 0.5 to 1 Volt Figure 30 - Basic Accuracy "A" GlobalTestSupply www. -
Page 86: Measurement Accuracy Ae
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. - Page 87 Level Correction Factor A Vs = Test signal voltage (Vrms) Level Correction Factor (AL) [5 m, 50 m] 2.5 × 50 mVrms / Vs (50 m, 200 m) (200 m, 500 m) 500 mVrms / Vs (500 m, 1) (1, 2] Table 12 - Level Correction Factor (A The figure below shows the correction level factor (A ) graphically.
- Page 88 Fm 1.2 kHz 1.2 kHz fm ≤ 8 kHz Medium Slow 8 kHz fm ≤ 150 kHz ...
- Page 89 Kb Compensation Determine the K compensation and multiply it by the K value obtained from the table above, the result will be the new K and it is this value what should be used in the accuracy calculation: Cable length L [m] Fm ≤...
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Page 90: Accuracy Of D
Temperature Factor: Ke Temperature (℃) 0 - 18 18 - 28 28 - 40 Table 18 - Temperature Factor Ke Accuracy of D When D (tested value of D) ≤ 0.1, the accuracy of D is given by the formula below: ... -
Page 91: Accuracy Of Rp
Accuracy of Rp When D (value of tested D) ≤ 0.1 the accuracy of R is given by the formula below: [Ω] Where, R is the value of tested R with the unit [S]. is the value of test D with the unit [F]. is the accuracy of D. -
Page 92: Accuracy Calculation Examples
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 + �� ��... -
Page 93: Example 2
See Table 16 and Table 17. Kd= 0 L=0, therefore, Kd=0. Ke= 1 Room temperature during test= 20 . Temperature Factor =1. See Table 18. Fixture no available for this unit. ）×100+ K = ± [A × A+（K ]×K �� = ±... - Page 94 Ka= 0.00053995862 Ka = 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) −3 1��10 Ka = ( ) (1+200/1)( √...
- Page 95 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.
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Page 96: Rs-232
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. -
Page 97: Usb (Usbcdc - Virtual Com )
USBTMC driver be installed. It is included when a VISA software is installed on the computer. (We recommend using NI-VISA, which can be downloaded at http://www.ni.com/visa/). LAN (Ethernet) The 894/895 can also be controlled via LAN interface. Refer to 8.1, LAN Setup for more information. GlobalTestSupply www. -
Page 98: Gpib (895 Only)
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. -
Page 99: Technical Description
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. -
Page 100: Handler Operation
/BIN9 /OUT /AUX /EXT.TRIG External trigger: when the trigger mode is EXT.TRIG, the 894/895 will be triggered by the positive-edge pulse signal in this pin. External DC voltage 2: EXT.DCV2 The DC provider pin for the optoelectronic coupling signal (/EXT_TRIG, /Key Lock, /ALARM, /INDEX, /EOM) GlobalTestSupply www. - Page 101 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. /PHI Indicates that the test result is greater than the high limit set on BIN1 to BIN9.
- Page 102 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. GlobalTestSupply www.
- Page 103 measurement 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: 0.5ms GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 104 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.
- Page 105 /INDEX 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.
- Page 106 *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. Figure 36 - List Sweep Timing Diagram GlobalTestSupply www.
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Page 107: Electrical Features
Table 23 - Electrical Features of DC Isolation Output Output Rated Voltage Reference Ground in the Output Signal Max Current Circuit HIGH Compared Signal Internal pull-up voltage: /BIN1 - /BIN9 894/895 GND /AUX ≤0.5V +5V to +24V /OUT EXTV1: COM1COM1 /PHI /PLO Control Signal Internal pull-up voltage :... -
Page 108: Handler Interface Board Circuit
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 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com... - Page 109 Figure 38 - Output Circuit for Control Signal GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 110: Handler
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. - Page 111 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.
- Page 112 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.
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