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1920 Precision LCR Meter User and Service Manual

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1920 Precision LCR Meter User and Service Manual ♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦ 1920 Precision LCR Meter User and Service Manual Copyright © 2014 IET Labs, Inc. Visit www.ietlabs.com for manual revision updates 1920 im/February 2014 IET LABS, INC. www.ietlabs.com Long Island, NY • Email: [email protected] TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988 ♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦ IET LABS, INC. www.ietlabs.com Long Island, NY • Email: [email protected] TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988 ♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦ WARRANTY We warrant that this product is free from defects in material and workmanship and, when properly used, will perform in accordance with applicable IET specifi cations. If within one year after original shipment, it is found not to meet this standard, it will be repaired or, at the option of IET, replaced at no charge when returned to IET. Changes in this product not approved by IET or application of voltages or currents greater than those allowed by the specifi cations shall void this warranty. IET shall not be liable for any indirect, special, or consequential damages, even if notice has been given to 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 OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. IET LABS, INC. www.ietlabs.com 534 Main Street, Westbury, NY 11590 TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988 i WARNING OBSERVE ALL SAFETY RULES WHEN WORKING WITH HIGH VOLTAGES OR LINE VOLTAGES. Dangerous voltages may be present inside this instrument. Do not open the case Refer servicing to qualifi ed personnel HIGH VOLTAGES MAY BE PRESENT AT THE TERMINALS OF THIS INSTRUMENT WHENEVER HAZARDOUS VOLTAGES (> 45 V) ARE USED, TAKE ALL MEASURES TO AVOID ACCIDENTAL CONTACT WITH ANY LIVE COMPONENTS. USE MAXIMUM INSULATION AND MINIMIZE THE USE OF BARE CONDUCTORS WHEN USING THIS INSTRUMENT. Use extreme caution when working with bare conductors or bus bars. WHEN WORKING WITH HIGH VOLTAGES, POST WARNING SIGNS AND KEEP UNREQUIRED PERSONNEL SAFELY AWAY. CAUTION DO NOT APPLY ANY VOLTAGES OR CURRENTS TO THE TERMINALS OF THIS INSTRUMENT IN EXCESS OF THE MAXIMUM LIMITS INDICATED ON THE FRONT PANEL OR THE OPERATING GUIDE LABEL. ii Contents Warranty ............................................................................................................5 Specifications ............................................................................................................7 Accessories ............................................................................................................10 Safety Precautions ....................................................................................................14 Condensed Operating ..............................................................................................16 Installation and Power Up Selecting Test Conditions Zeroing Connection to Device Under Test Initiating Tests Introduction - Section 1 1.1 Unpacking/Inspection ....................................................................................31 1.2 Product Overview ..........................................................................................31 1.3 Front Panel Description .................................................................................32 1.4 Rear Panel Description ..................................................................................34 1.5 Installation .....................................................................................................35 1.5.1 Dimensions ........................................................................................35 1.5.2 Instrument Positioning .......................................................................35 1.5.3 Power Requirements ..........................................................................35 1.5.4 Safety Inspection ................................................................................37 Operation - Section 2 2.1 Terms and Conventions .................................................................................39 2.2 Power Up .......................................................................................................41 2.3 Program/Setup Procedure (Test 1–25) ...........................................................41 2.3.1 Primary Parameter .............................................................................42 2.3.2 Secondary Parameter .........................................................................45 2.3.3 Frequency ...........................................................................................46 2.3.4 Amplitude ..........................................................................................46 2.3.5 Bias Voltage .......................................................................................47 2.3.6 Range Select ......................................................................................48 2.3.7 Accuracy ............................................................................................51 2.3.8 Delay ..................................................................................................53 2.3.9 No. to Average ...................................................................................54 2.3.10 Primary Nominal ................................................................................55 2.3.11 Bin Type.............................................................................................56 2.3.12 Secondary Nominal ............................................................................59 Contents (continued) 2.3.13 Load Correction .................................................................................60 2.3.14 Primary Load Correction ...................................................................61 2.3.15 Secondary Load Correction ...............................................................61 2.4 Program/Sequence (Test S1-S9) ....................................................................62 2.5 Utility Functions ............................................................................................64 2.5.1 Perform Calibration ...........................................................................65 2.5.2 Keypad Lockout .................................................................................69 2.5.3 Display Type ......................................................................................72 2.5.4 Numeric Format .................................................................................73 2.5.5 Trigger Source ...................................................................................74 2.5.6 Source Impedance ..............................................................................74 2.5.7 RS-232 Baud Rate..............................................................................75 2.5.8 IEEE488 Address ..............................................................................75 2.5.9 Clear All Tests ...................................................................................76 2.5.10 Leveling .............................................................................................76 2.5.11 Cable Comp. ......................................................................................77 2.5.12 Frequency Edit Type ..........................................................................77 2.5.13 Median ...............................................................................................78 2.5.14 Distortion ...........................................................................................78 2.5.15 Serial Number ....................................................................................79 2.5.16 Software Version ...............................................................................79 2.6 Error Messages ..............................................................................................79 Interface - Section 3 3.1 General ...........................................................................................................81 3.2 Remote I/O .....................................................................................................81 3.3 RS-232 Interface ............................................................................................83 3.4 IEEE-488.2 Interface .....................................................................................84 3.4.1 General ...............................................................................................84 3.4.2 IEEE-488 Connections ......................................................................85 3.4.3 IEEE-488 & RS-232 Commands .......................................................86 3.4.4 Formats ..............................................................................................92 Page 2 of 109 Contents (continued) Theory - Section 4 4.1 Introduction ....................................................................................................95 4.1.1 Description of 1920 Precision LCR Meter ........................................95 4.1.2 Block Diagram ...................................................................................97 4.2 Principle Functions ........................................................................................99 4.2.1 Fundamental Measurement ................................................................99 4.2.2 Sine
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