1863 and 1864 Meghommeters
ii
CONTENTS, FIGURES, AND TABLES
Chapter 4: APPLICATIONS ........................................................................13
4.1 Insulation Testing ..................................................................................................... 13
4.2 Test Sample Resistivity Measurements .................................................................... 13
4.3 Capacitor Insulation Resistance .............................................................................. 14
4.3.1 General ........................................................................................................... 14
4.3.2 Charging Time Constant ................................................................................ 14
4.3.4 Discharge Time .............................................................................................. 15
4.3.5 Large Capacitors, Very High Resistance ....................................................... 15
4.4 Resistance Measurements ........................................................................................ 16
4.5 Measurement of Voltage Coef
fi
cient ........................................................................ 16
4.6 Guarded 3-Terminal Measurements ......................................................................... 16
4.7 Remote Shielded Measurements .............................................................................. 17
4.8 Measurements Under Humid Conditions ................................................................. 17
Chapter 5: THEORY ....................................................................................19
5.1 Theory Overview .................................................................................................... 19
5.2 Circuit Description ................................................................................................... 19
5.2.1 Type 1863 Megohmmeter .............................................................................. 19
5.2.2 Type 1864 Megohmmeter .............................................................................. 20
Chapter 6: Service And Maintenance .......................................................21
6.1 Service ...................................................................................................................... 21
6.3 Cabinet Removal ...................................................................................................... 23
6.4 Troubleshooting ....................................................................................................... 23
6.5 Calibration ................................................................................................................ 24
6.5.1 Meter Tracking ............................................................................................... 24
6.5.2 Voltage Accuracy ........................................................................................... 24
6.5.3 Range-Resistor Accuracy ............................................................................... 25
6.5.4 Coarse
∞
Adjustment .................................................................................... 25
6.6 Knob Removal ......................................................................................................... 25
6.7 Knob Installation ...................................................................................................... 26
6.8 Meter Cover Care ..................................................................................................... 27
Chapter 7: PARTS LISTS AND DIAGRAMS ..............................................29
Summary of Contents for 1863
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Page 50: ...36 PARTS LISTS AND DIAGRAMS Figure 7 3 Type 1863 switching diagram...
Page 52: ...38 PARTS LISTS AND DIAGRAMS Figure 7 6 Type 1863 schematic diagram...
Page 53: ...1863 and 1864 Meghommeters 39 PARTS LISTS AND DIAGRAMS Figure 7 7 Type 1864 switching diagram...
Page 55: ...1863 and 1864 Meghommeters 41 PARTS LISTS AND DIAGRAMS Figure 7 9 Type 1864 schematic diagram...
Page 56: ...42 PARTS LISTS AND DIAGRAMS Figure 7 10 Complete cabinet assembly P N 4182 2328...
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