QuadTech 7600 B User manual

7600 Precision LCR Meter
Model B
Instruction Manual
Form 150261/A4
QuadTech, Inc., 1997
The material in this manual is for informational purposes only and is subject to change,
without notice. QuadTech assumes no responsibility for any error or for consequential
damages that may result from the misinterpretation of any procedures in this publication.
!Product will be marked with this symbol (ISO#3684) when it is necessary for the user to
refer to the instruction manual in order to prevent injury or equipment damage.
Product marked with this symbol (IEC417) indicates presence of direct current.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
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iii
Contents
Warranty ...........................................................................................................vii
Specifications ...........................................................................................................ix
Introduction - Section 1
1.1 Unpacking and Inspection.............................................................................1-1
1.2 Product Overview..........................................................................................1-1
1.3 Controls and Indicators..................................................................................1-2
1.4 Accessories Included.....................................................................................1-5
1.5 Accessories/Options Available......................................................................1-5
1.6 Installation .....................................................................................................1-6
1.6.1 Instrument Positioning.......................................................................1-6
1.6.2 Power Requirements..........................................................................1-6
1.6.3 Safety Inspection ............................................................................... 1-7
Operation - Section 2
2.1 General...........................................................................................................2-1
2.2 Startup ...........................................................................................................2-1
2.3 Connection to Device Under Test .................................................................2-1
2.4 Zeroing...........................................................................................................2-2
2.5 Measurement Procedure ................................................................................2-3
2.5.1 General...............................................................................................2-3
2.5.2 Default Measurement Conditions......................................................2-3
2.6 Menu Functions.............................................................................................2-5
2.6.1 General...............................................................................................2-5
2.6.2 Setup Menu........................................................................................2-5
2.6.2.1 Primary Parameter................................................................2-6
2.6.2.2 Secondary Parameter............................................................2-9
2.6.2.3 Frequency .............................................................................2-10
2.6.2.4 AC Test Signal .....................................................................2-10
2.6.2.5 DC Bias Voltage...................................................................2-11
2.6.2.6 Range Hold...........................................................................2-14
2.6.2.7 Range Locked.......................................................................2-15
2.6.2.8 Measurement Accuracy........................................................2-20
2.6.2.9 Measurement Delay..............................................................2-20
2.6.2.10 # to Average .......................................................................2-21
2.6.2.11 Contact Check ....................................................................2-21

iv
Contents (continued)
2.6.3 I/O Menu............................................................................................2-22
2.6.3.1 Display Type ........................................................................2-23
2.6.3.2 Nominal Value......................................................................2-26
2.6.3.3 Result Format ....................................................................... 2-26
2.6.3.4 Trigger..................................................................................2-27
2.6.3.5 Handler Interface..................................................................2-27
2.6.3.6 RS-232 Interface...................................................................2-27
2.6.3.7 IEEE-488.2 Interface............................................................2-28
2.6.3.8 Print Results..........................................................................2-28
2.6.3.9 Results to Floppy..................................................................2-29
2.6.4 Analysis Menu...................................................................................2-35
2.6.4.1 Binning .................................................................................2-36
2.6.4.2 Test Sequencing....................................................................2-41
2.6.4.3 Parameter Sweep .................................................................. 2-44
2.6.4.4 Median..................................................................................2-46
2.6.4.5 Distortion Detection ............................................................. 2-46
2.6.4.6 Load Correction....................................................................2-46
2.6.5 Utilities Menu....................................................................................2-48
2.6.5.1 Save Setup ............................................................................ 2-49
2.6.5.2 Recall Setup.......................................................................... 2-50
2.6.5.3 Setup Accuracy.....................................................................2-51
2.6.5.4 Open / Short..........................................................................2-54
2.6.5.5 Lock Out...............................................................................2-55
2.6.5.6 Calibration............................................................................2-56
2.6.5.7 Set Time/Date.......................................................................2-56
2.6.5.8 Usage/Cal Date.....................................................................2-57
2.6.5.9 Set Contrast ..........................................................................2-57
2.6.5.10 Self Test..............................................................................2-58
2.6.5.11 LCD Backlite......................................................................2-58
2.7 Input/Output Interface ...................................................................................2-59
2.7.1 I/O Interface.......................................................................................2-59
2.7.2 Parallel Interface................................................................................2-63
2.7.3 IEEE-488.2 Interface.........................................................................2-64
2.7.3.1 Formats.................................................................................2-74
2.7.3.2 Sample Program for National Instruments GPIB card.........2-76
2.7.4 RS232 Interface.................................................................................2-77
2.7.5 Results to Printer ...............................................................................2-78

v
Contents (continued)
2.8 Operation with Accessories........................................................................... 2-79
2.8.1 General...............................................................................................2-79
2.8.2 Rack Mount Kit (7000-00)................................................................2-79
2.8.3 BNC Cable Set, 1 Meter (7000-01), 2 Meter (7000-02)...................2-79
2.8.4 Kelvin Clip Leads (7000-03).............................................................2-80
2.8.5 Alligator Clip Leads (7000-04).........................................................2-82
2.8.6 Chip Component Tweezers (7000-05) ..............................................2-83
2.8.7 Low V, Axial/Radial Lead Component Test Fixture (7000-06).......2-84
2.8.8 Low V, Chip component Test Fixture (7000-07)..............................2-85
2.8.9 High Voltage Test Fixture (7000-08)................................................2-87
2.8.10 Calibration Kit (7000-09)..................................................................2-88
2.8.11 Connections to 874 Type Adapters ...................................................2-89
2.9 Error Messages .............................................................................................. 2-90
Theory Section 3
3.1 General...........................................................................................................3-1
3.2 Instrument Description ..................................................................................3-1
3.2.1 Basic I2000 Instrument Architecture ................................................3-1
3.2.2 7600 Instrument Module ...................................................................3-2
3.2.3 I2000 Instrument Options..................................................................3-3
Maintenance/Calibration - Section 4
4.1 General...........................................................................................................4-1
4.2 Instrument Return..........................................................................................4-1
4.3 Routine Maintenance.....................................................................................4-1
4.3.1 Battery Replacement .........................................................................4-1
4.3.2 Bias Voltage Fuse Replacement........................................................4-2
4.3.3 Resetting of Time and Date...............................................................4-2
4.3.4 Loss of Display Contrast...................................................................4-3
4.3.5 Preventive Maintenance/Cleaning.....................................................4-4
4.4 Calibration .....................................................................................................4-4
4.4.1 General...............................................................................................4-4
4.4.2 Calibration Procedure........................................................................4-4

vi

vii
Warranty
QuadTech warrants that Products are free from defects in material and workmanship and,
when properly used, will perform in accordance with QuadTech's applicable published
specifications. If within one (1) year after original shipment it is found not to meet this
standard, it will be repaired, or at the option of QuadTech, replaced at no charge when
returned to a QuadTech service facility.
Changes in the Product not approved by QuadTech shall void this warranty.
QuadTech shall not be liable for any indirect, special or consequential damages,
even if notice has been given of the possibility of such damages.
This warranty is in lieu of all other warranties, expressed or implied, including, but
not limited to any implied warranty or merchantability or fitness for a particular
purpose.
SERVICE POLICY
QuadTech policy is to maintain product repair capability for a period of at least five (5)
years after original shipment and to make this capability available at the then prevailing
schedule of charges.

ix
Specifications
Measurement Capacitance (Cs/Cp), Inductance (Ls/Lp), Resistance (Rs/Rp),
Parameters: Dissipation (DF) and Quality (Q) Factors, Impedance (|Z|),
Admittance |Y|, Phase Angle (θ), Equivalent Series Resistance
(|ESR|), Conductance (Gp), Reactance (Xs), Susceptance (Bp)
Any two parameters measured and displayed simultaneously
Note: s = series, p = parallel, ESR equivalent to Rs
Measurement |Z|, R, X: 000.0001 mohm to 99.99999 Mohm
Ranges: |Y|, G, B: 00000.01 µS to 9.999999 MS
C: 00000.01 fF to 9.999999 F
L: 0000.001 nH to 99.99999 H
D: .0000001 to 99.99999
Q: .0000000 to 999999.9
Phase Angle: -180.0000 to +179.9999 degrees
Delta %: -99.9999 % to +99.9999 %
Measurement Fast Medium Slow
Accuracy: LCR: +/- 0.5%* +/- 0.25%* +/- 0.05%*
DF: +/- 0.005 +/- 0.0025 +/- 0.0005
* At optimum test signal levels, optimum DUT value and without calibration
uncertainty error. Instrument accuracy can be reduced from nominal specifications
when using some 7000 accessory fixtures and cables. Best accuracy requires geometric
consistency between that utilized during open/short zeroing and that utilized on fixtures
and cables during the actual measurement process. This consistency may be especially
difficult to achieve when using unshielded Kelvin clip and tweezer type connections.
0.25 x (normal accuracy) with Load Correction implemented and
compared to user supplied standard.
In a range of 3Ω≤Z ≤80kΩ, 100mV ≤programmed V ≤1V or
100mV ≤(programmed I) x (Z) ≤1V
Test Frequency: 10 Hz to 2 MHz
Resolution: 0.1 Hz from 10 Hz to 10 kHz
5 digits > 10 kHz, 4 digits > 100 kHz
Accuracy: +/- (0.25% + 0.02 Hz)
Measurement Speed: Fast Accuracy: 40 msec*/measurement
Medium Accuracy: 125 msec*/measurement
Slow Accuracy: 1 sec*/measurement
* may be longer, depending on test conditions & frequency
Ranging: Automatic or Range Hold

x
Specifications (continued)
Source Impedance: 25Ω, 400Ω, 6.4 kΩor 100 kΩ, measurement range dependent
Trigger: Internal (automatic) and External (via handler, RS-232 or IEEE-
488.2 interfaces)
AC Test Signal 20 mV to 5.0 V (open circuit) in 5 mV steps, ≤500kHz
Voltage: 20 mV to 1.0 V (open circuit) in 5 mV steps, >500kHz to≤1MHz
20 mV to 0.5 V (open circuit) in 5 mV steps, >1MHz
Accuracy: +/- (5% + 1 mV) <100kHz
+/- (10% + 1 mV) 100kHz to 500kHz
+/- (20% + 1 mV) 500kHz to 1MHz
+/-(35%+1mV)>1MHz
AC Test Signal 250 µA to 100 mA (short circuit) in 50 µA steps
Current: Max Compliance: 3V < 500kHz, 1V from 500kHz - 1MHz
0.5V > 1MHz
Accuracy: +/- (5% +50 µA) <100kHz
+/-(10%+50µA) 100kHz to 500kHz
+/-(20%+50µA) 500kHz to 1MHz
+/-(35%+50µA) >1MHz
Bias Voltage: Internal: 2.0 VExternal: 0 to +/-200 V
Display: LCD Graphics with adjustable contrast and back light
- Results of Dual Measurement Parameters in engineering
(7 digits) or scientific (5 digits) notation
- Deviation from Nominal of Primary Parameter
- % Deviation from Nominal of Primary Parameter
- Instrument Setting and Test Conditions
- Bin Limits and Pass/Fail Results
- Plot of Primary Measurement Parameter vs. Test Conditions
- Table of Measurement Parameters vs. Test Conditions
- Sequenced Test Results Summary
Limit Detection: 15 bins total (10 pass, 4 fail, 1 no contact)
Interfaces: IEEE-488.2, RS-232, Handler, Printer Port and 3.5" Floppy Dr.
Front Panel Four terminal (BNC) with Guard
Test Terminals:
Environmental: MIL-T-28800E, Type 3, Class 5, Style E & F.
Operating: 0 to + 50oC. Storage: - 40 to + 71oC.
Humidity: < 75% for < 40oC operating
Altitude <2000m, Installation Category 1, Pollution Degree 1

xi
Specifications (continued)
Mechanical: Bench mount with tilt bail
Dimensions: (w x h x d): 16 x 6 x 14in
(410 x 150 x 360mm)
Weight: 17 lbs (8kg) net, 23 lbs (10.5kg) shipping
Power Requirements: 90 to 250Vac 47 - 63 Hz 40W maximum
Other Features: Charged Capacitor Protection:
8/ C
for Vmax
≤
250 V
2 / C
for Vmax
≤
1000V
C = Capacitance in farads of the device under test
Measurement Delay programmable from 0-1000 ms in 1 ms steps
Measurement Averaging programmable from 1-1000
Median value Mode
Open and Short Circuit Zeroing at Multiple Frequencies
Power Fail Protection (setting, results, & calibration data stored)
Storage and Recall of 25 Setups, 125/disk w/Floppy Option
Self-Test Routines at Power-up
Stored Results up to 40,000 measurements/disk w/Floppy Option
Self Accuracy Calibration and Display
Contact Check
Supplied: Instruction Manual Power Cable Calibration Certificate
Ordering Description Catalog No.
Information:
7600 Precision LCR Meter, Model B 7600
7600-CE Precision LCR Meter, Model B 7600-CE
7600A Precision LCR Meter, Model B,+/-500V ext bias 7600A
7600A-CE Precision LCR Meter, Model B 7600A-CE
+/-500V ext bias
Options & Accessories:
Rack Mount Kit 7000-00
BNC Cable Set, 1 meter 7000-01
BNC Cable Set, 2 meters 7000-02
Kelvin Clip Leads 7000-03
Alligator Clip Leads 7000-04
Chip Component Tweezers 7000-05
Low Voltage Axial/Radial Lead Component Test Fixture 7000-06
Low Voltage Chip Component Test Fixture 7000-07
High Voltage Test Fixture 7000-08
Calibration Kit 7000-
09

Introduction 1-1
Section 1 Introduction
1.1 Unpacking and Inspection
Inspect the shipping carton before opening, if damaged contact the carriers agent
immediately. Inspect the instrument for any damage. If the instrument appears damaged
or fails to meet specifications notify QuadTech (refer to instruction manual front cover)
or its local representative. Retain the shipping carton and packing material for future use
such as returning for re calibration or service.
1.2 Product Overview
The 7600 Precision LCR Meter is an automatic, user programmable instrument for
measuring a wide variety of impedance parameters. The 7600 covers a frequency range
from 10 Hz to 2 MHz with a basic measurement accuracy of 0.05%. The instruments
high resolution graphics display and keypad makes for easy menu programming. Test
conditions are stored and recalled from internal memory, eliminating wasted
measurement setup time. Extensive pass/fail binning capability and measurements
speeds up to 25/sec makes the unit well suited for production applications.
The instruments unique measurement sequencing allows up to six parameters to be
measured on a single pass. Additionally, a parameter can be plotted against a test
condition variable, an invaluable technique for component design and product evaluation.
The 7600 comes with IEEE-488.2, RS-232, I/O port (handler), and parallel interfaces, all
standard, for remote control operation and communication with other instrumentation. A
3 1/2" floppy drive is also included for program/data storage of test conditions and
measurement results.
DISPLAY SELECT ENTRY TEST
QuadTech 123
456
789
0
-.
STOP
START
C
DF
Freq
Range
Delay
AC Signal
AverageAuto Off
MENU
CNCL
ENTER
FAIL PASS
Precision
!
CAUTION
HIGH VOLTAGE .0000100
17.52520 pF
1.0000kHz
Bias 1
1.0000V
0 ms
7600LCR Meter
Figure 1-1
7600 Precision LCR Meter