Guildline 6675A - Page 3

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3.5. BASIC MENU OPERATIONS .......................................................................................................................3-8
3.5.1. Menu Option - <MEASURE>..................................................................................................................3-8
3.5.2. Menu Option - <any other menu but measure>........................................................................................3-9
3.5.3. Base Edit/Select Menu - one column of data..........................................................................................3-10
3.5.4. Base Edit/Select Menu - two columns of data........................................................................................3-10
3.5.5. Operation of Select/Edit Data Menus .....................................................................................................3-10
3.5.5.1. Function - <Screen ?>........................................................................................................................3-10
3.5.5.2. Function - <Select>............................................................................................................................3-11
3.5.5.3. Function - <Ok>.................................................................................................................................3-11
3.6. TITLE SCREEN .............................................................................................................................................3-12
3.7. MAIN MENU...................................................................................................................................................3-13
3.7.1.1. <Measure> MENU Fn-1 (MAIN) Page 1 of 3..................................................................................3-14
3.7.1.2. <Measure> MENU Fn-1 (MAIN) Page 2 of 3..................................................................................3-16
3.7.1.3. <Measure> MENU Fn-1 (MAIN) Page 3 of 3..................................................................................3-17
3.7.2. <Setup> MENU Fn-2 (MAIN)..............................................................................................................3-18
3.7.2.1. <Load> MENU Fn-1 (Setup_MAIN)................................................................................................3-18
3.7.2.2. <Edit> Resistors MENU Fn-2 ...........................................................................................................3-20
3.7.2.3. <Save> MENU Fn-3 (Resistors_Setup_MAIN) ...............................................................................3-32
3.7.3. <Voltmeter> MENU Fn-1 (MAIN)........................................................................................................3-34
3.7.4. <Sofcal> MENU Fn-4 (MAIN)..............................................................................................................3-36
3.7.4.1. <GPIB> MENU Fn-1 (Sofcal_MAIN)..............................................................................................3-37
3.7.4.2. <RS232> MENU Fn-2 (Sofcal_MAIN)............................................................................................3-38
3.7.4.3. <Voltmeter> MENU Fn-3 (Sofcal_MAIN).......................................................................................3-40
3.7.4.4. <Diagnostic> MENU Fn-1 (Sofcal_MAIN) .....................................................................................3-42
3.7.4.5. <Selftest> MENU Fn-2 (Sofcal_MAIN)...........................................................................................3-45
3.7.4.6. <Chart> MENU Fn-3 (Sofcal_MAIN)..............................................................................................3-46
3.7.4.7. <Filter> MENU Fn-1 (Sofcal_MAIN) ..............................................................................................3-47
3.7.4.8. <Datum> MENU Fn-2 (Sofcal_MAIN)............................................................................................3-47
3.7.4.9. <PASSWORD> MENU Fn-3 (Sofcal_MAIN).................................................................................3-48
3.8. MEASUREMENT OPERATION GUIDE ..................................................................................................3-49
3.8.1. Introduction .............................................................................................................................................3-49
3.8.2. Resistance Measurement Normal Ohms - 1 m  Rs
 10 k ............................................................3-49
3.8.2.1. General Procedures.............................................................................................................................3-52
3.8.3. Resistance Measurement - High Ohms - 100 k  Rs
 100 M; Rx  1 G ....................................3-56
3.8.3.1. High Ohms Measurements - General Procedures..............................................................................3-56
3.8.4. Resistance Measurement - Low Ohms. ..................................................................................................3-61
3.8.4.1. General Procedures Using Guildline High Current Range Extenders..............................................3-62
3.8.5. Thermometry Measurements. .................................................................................................................3-65
3.8.6. Summary of Recommended Test Setups................................................................................................3-67
3.9. 6675A DATA ACQUISITION SOFTWARE..............................................................................................3-69
4. THEORY OF OPERATION.......................................................................................4-1
4.1. THEORY I INTRODUCTION .......................................................................................................................4-1
4.1.1. The automatic direct-current-comparator resistance bridge.....................................................................4-2
4.1.1.1. The manual bridge - background.........................................................................................................4-2
4.1.2. The automatic bridge.................................................................................................................................4-3
4.1.3. Automatic direct-current-comparator bridge balance...............................................................................4-5
4.2. THEORY II RESISTANCE MEASUREMENT - 9975 BACKGROUND................................................4-8
4.2.1. Theory II 6675A........................................................................................................................................4-9
4.2.2. 6675A Servo Circuit................................................................................................................................4-13