VOLTMETER, DIGITAL AN/GSM-64C (NSN )

Transcription

1 TECHNICAL MANUAL OPERATOR S, ORGANIZATIONAL DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL VOLTMETER, DIGITAL AN/GSM-64C (NSN ) HEADQUARTERS, DEPARTMENT OF THE ARMY 11 MARCH 1983

2 Technical Manual No TM HEADQUARTERS DEPARTMENT OF THE ARMY Washington, DC, 11 March 1983 OPERATOR S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL VOLTMETER, DIGITAL AN/GSM-64C (NSN ) REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this manual. If you find any mistake or you know of a way to improve the procedures, please let us know. Mail your letter, DA Form 2028 (Recommended Changes to Publications and Blank Forms), or DA Form located in back of this manual direct to: Commander, US Army Communications and Electronics Materiel Readiness Command, ATTN: DRSEL-ME-MQ, Fort Monmouth, NJ A reply will be furnished to you. i

3 TABLE OF CONTENTS CHAPTER 1. INTRODUCTION Paragraph General Scope. Indexes of publications Forms and records. Reporting equipment improvement recommendations (EIR) Description and data Purpose and use.. Description Tabulated data.... Items comprising an operable equipment CHAPTER 2. INSTALLATION Service upon receipt Unpacking Checking unpacked equipment installation instructions Portable use..... Rack installation CHAPTER 3. OPERATING INSTRUCTIONS Controls and instruments General Damage from improper settings.. Guarded measurements Operation under normal conditions General Preliminary starting procedure.. Dc voltage measurement..... DC/DC ratio measurement..... Ac voltage measurement... 14c + Dc voltage measurement.. Remote programming BCD output Stand by operation. Procedures for shutdown ii

4 TABLE OF CONTENTS (Cont) CHAPTER 3. OPERATING INSTRUCTIONS (Cont) Paragraph Section III. Preparation for movement General Bench/shelf movement Rack removal (optional rack installation) CHAPTER 4. OPERATOR AND ORGANIZATIONAL MAINTENANCE Tools and equipment General Materials required Lubrication Lubrication Section III. Preventive maintenance checks General... Checks and services Section IV. Troubleshooting General Procedure Section V. Maintenance of voltmeter General Removal/replacement Cleaning Functional testing CHAPTER 5. FUNCTIONING OF EQUIPMENT Block diagram analysis Introduction Dc measurement mode Ac measurement mode Dc ratio mode.... Analog to digital (A/D) converter Auto ranging Logic circuit description Introduction Range logic tables. Autorange logic (A1 Assembly) iii

5 TABLE OF CONTENTS (Cont) CHAPTER 5. FUNCTIONING OF EQUIPMENT (Cont) Paragraph Logic circuit description (cont) Up range detector, minus voltage Up range detector, plus voltage. Down range detector, minus voltage Down range detector, plus voltage Autorange logic (A2 Assembly).. Remote autorange. Ratio autoranging (A1 Assembly). Ratio up range detector, plus input signal.... Ratio up range detector, minus input signal... Ratio down range detector, plus input signal.. Ratio down range detector, minus input signal. Function logic tables Timing waveforms CHAPTER 6. DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE General Introduction..... Tools and test equipment Schematic diagrams Tools and test equipment Tools and test equipment required Section III. Troubleshooting General Fault isolation.... Power supply checks Section V. Maintenance of the voltmeter General Disassembly Cleaning instructions Repair and replacement Assembly Section V. Performance assurance tests General Performance testing iv

6 TABLE OF CONTENTS (Cont) CHAPTER 6. DIRECT SUPPORT AND GENERAL SUPPORT Paragraph MAINTENANCE Section VI. Minimum specifications of equipment required General 5 Dc volts accuracy adjustments.. 6 Dc ratio accuracy adjustments Dc volts autoranging adjustments Dc/dc ratio autoranging adjustments Ac volts accuracy adjustments Final procedure APPENDIX A. REFERENCES..... A-1 APPENDIX B. MAINTENANCE ALLOCATION Introduction B-1 Section III. Maintenance allocation chart for Voltmeter AN/GSM-64C Tool and test equipment requirements for Digital Voltmeter, AN/GSM-64C. B-3 B-5 LIST OF ILLUSTRATIONS Figure Title Digital Voltmeter AN/GSM-64C Outline Drawing, Portable Configuration.. Outline Drawing, Rack Mount Configuration An/GSM-64C Packing Diagram Voltage Selection and Fused Receptacle (Rear Panel).. Equipment Connections Rack Mount installation Front Panel Controls and Instruments.... Rear Panel Controls and instruments.. Common Mode Signal Configuration..... Guarded Signal Configuration Average, Rms, and Peak Voltage Relationship of a Sine Wave..... Effect of Dc Bias on the True Rms Voltage of a Square Wave Knob Removal and Replacement... Range Selection Diagram... Function Selection Diagram. Timing Waveforms Location of Test Points V

7 LIST OF ILLUSTRATIONS (Cont) Figure Title FO-1 FO-2 FO-3 FO-4 FO-5 FO-6 FO-7 FO-8 FO-9 FO-10 FO -1 1 FO-12 FO-13 FO-14 Location of Adjustments.... Location of Connectors.... Troubleshooting Flow Chart, Dc Voltage.. Troubleshooting Flow Chart, Ac Voltage.. Troubleshooting Flow Chart, Dc/Dc Ratio. Troubleshooting Flow Chart, Auto Ranging PCB, Digital Circuit Board... PCB, Analog Circuit Board Digital Voltmeter AN/GSM-64C, Exploded View Rms Converter (A7) Signal Input Connections Digital Voltmeter AN/GSM-64C, Front Panel Assembly.. Digital Voltmeter AN/GSM-64C, Bottom Cover Explosion Digital Voltmeter AN/GSM-64C, Rear Panel Assembly.. DcVoltage Accuracy Checks Dc/dc Ratio Accuracy Checks AcVoltage Accuracy Checks Dc Volts Calibration, Equipment Connections Location of Adjustments, Analog and Ratio Boards.... DC Ratio Calibration, Equipment Connections DC Ratio Calibration, Equipment Connections Location of Test Points.... DC Ratio Auto Range Detector Calibration. Location of Adjustments and Test Points, Autoranging.. DC Voltage Autoranging, Equipment Connections..... DC/DC Ratio Autoranging, Equipment Connections.... Location of Adjustments, True Rms Board. RMS Converter Adjustment, Equipment Connections... Crest Factor Adjustment, Equipment Connections..... DC Volts Accuracy, Equipment Connections AC Volts Accuracy Check, Equipment Connections.... Voltmeter Block Diagram... Power Supply (A1, A2) Schematic Diagram DC Volts Attenuator/Analog Switching (A1) Schematic Diagram..... A/D Converter Schematic Diagram..... Auto Range Up/Down Detector (A1) Schematic Diagram Relay Switching Circuits (A1) Schematic Diagram..... Function Select Logic (A2) Schematic Diagram Manual/Auto/Remote Range Circuits (A2) Schematic Diagram... Counters and Display Circuits (A2, A3) Schematic Diagram Parallel BCD Output (A2) Schematic Diagram Range Encoder/DP Encoder Circuits (A2) Rms Converter Preamplifier and Scaling (A7) True Rms Converter (A7) Schematic Diagram Dc Ratio Amplifier (A9) Schematic Diagram. Schematic Diagram... Schematic Diagram All fold-out illustrations are located in back of manual. Vi

8 LIST OF TABLES Table No. Title Dc Voltage Ranges Ac Voltage Ranges Ac Voltage Accuracy Front Panel Controls and lnstruments.... Rear Panel Controls and lnstruments.... Ratio initialization Voltages.. Remote Program Connector, A2J BCD Output Logic Material Required Operator s Preventive Maintenance Checks and Services Organizational Preventive Maintenance Checks and Services Ac Attenuation Ratio Polarity.. Ratio Ranging Manual Range Selection Logic, A2-U57.. Range Selection Logic, A2-U Range Selection Logic, A2-U Autorange Logic, A2-U Function Select Logic, A2-U Function Select Logic, A2-U Required Test Equipment.. Power Supply voltage Measurement..... Voltmeter Dc Voltage Accuracy Checks Voltmeter Ac Voltage Accuracy Checks. : Voltmeter Dc/dc Ratio Autoranging Checks Voltmeter Ac Voltage Accuracy Checks.. Minimum Specifications of Equipment Required Accessories Required Rms Converter Dc Range Checks Rms Converter Ac Range Checks vii/(viii blank)

9 Figure. 1-0

10 CHAPTER 1 INTRODUCTION GENERAL. Scope This manual describes Voltmeter, Digital AN/- GSM-64C (Voltmeter) and provides instructions for operation, organizational, direct support, and general support (GS) maintenance. Instructions are provided for the operator and organizational technician for installation, operation and preventive maintenance. Circuit functioning is included for general support maintenance together with instructions appropriate to these categories of maintenance for troubleshooting, testing, and repairing the equipment and replacing maintenance parts.. Indexes of Publications a. DA Pam Refer to the latest issue of DA Pam to determine whether there are new editions, changes or additional publications pertaining to the equipment. b. DA Pam Refer to DA Pam to determine whether there are modification work orders (MWO S) pertaining to the equipment Forms and Records a. Reports of Maintenance and Unsatisfactory Equipment. Maintenance forms, records and reports which are to be used by maintenance personnel at all levels are listed in and prescribed by TM b. Report of Packaging and handling Deficien ces. Fill out and forward DD Form 6 (Packaging Improvement Report) as prescribed in AR /NAVSUPINST /AFR 73/MCO P A, and DLAR c. Discrepancy in Shipment Report (DISREP) (SF 361). Fill out and forward Discrepancy in Shipment Report (DISREP) (SF 361) as prescribed in AR 55-38/NAVSUPINST B/AFR 78 - /MCO P461O.19C and DLAR d. Destruction of Army Electronics Materiel. Demolition and destruction of electronic equipment will be under the direction of the commander and in accordance with TM Reporting Equipment Improvement Recommendations (EIR). ElR s will be prepaired using Standard Form 368, Quality Deficiency Report. Instructions for preparing ElR s are provided in TM , The Army Communications and Electronics Materiel Readiness Command, ATTN: DRSEL-ME-MQ, Fort Monmouth, NJ A reply will furnished direct to you.