ix
List of Figures
Figure
Title
Page
1-1.
2680A/2685A Device ............................................................................................ 1-4
1-2.
268XA Chassis ...................................................................................................... 1-5
2-1.
Communication Control System............................................................................ 2-3
2-2.
268XA Main Supply Circuit.................................................................................. 2-4
2-3.
System Interface Unit ............................................................................................ 2-6
2-4.
FPGA Block Diagram............................................................................................ 2-8
2-5.
A3 A/D Converter Block Diagram ........................................................................ 2-17
2-6.
DC Volts 300 V Range Simplified Schematic....................................................... 2-20
2-7.
RTD Measurement Simplified Schematic ............................................................. 2-21
2-8.
AC Volts #V Range Simplified Schematic............................................................ 2-23
2-9.
Integrator Output Waveform for Input Near 0....................................................... 2-26
2-10. Integrator Output Wavefrom for Input Near + Full Scale ..................................... 2-26
2-11. Integrator Output Waveform for Input Near - Full Scale ...................................... 2-27
2-12. A/D Timing (FAI Normal Reading) ...................................................................... 2-39
2-13. A/D Timing (PAI Normal Reading, PAI and FAI Reference Balance)................. 2-39
2-14. A/D Status Signals ................................................................................................. 2-40
3-1.
Replacing the Fuse................................................................................................. 3-7
3-2.
DC Fuse Location .................................................................................................. 3-9
4-1.
Connection Between Device and Host .................................................................. 4-5
4-2.
2-Wire Connections to 5700A ............................................................................... 4-15
4-3.
4-Wire Connections to the Universal Input Module (Resistor) ............................. 4-16
4-4.
4-Wire Connections to the Universal Input Module (5700A) ............................... 4-17
4-5.
DIO Connector Module ......................................................................................... 4-20
5-1.
Device and Host Computer Calibration Setup....................................................... 5-5
5-2.
Universal Input Module Calibration Connections ................................................. 5-5
5-3.
Two-Wire Calibration Connection ........................................................................ 5-6
5-4.
Four-Wire Calibration Connection ........................................................................ 5-7
6-1.
Display Test Pattern #1.......................................................................................... 6-38
6-2.
Display Test Pattern #2.......................................................................................... 6-38
7-1.
268XA Final Assembly.......................................................................................... 7-10
7-2.
Blank Module ........................................................................................................ 7-11
7-3.
DIO Module........................................................................................................... 7-13
7-4.
FAI Module............................................................................................................ 7-15
7-5.
PAI Module............................................................................................................ 7-17
7-6.
Isothermal Input ..................................................................................................... 7-18
Summary of Contents for 2680A
Page 6: ......
Page 12: ...268XA Service Manual vi ...
Page 18: ...268XA Service Manual 1 2 ...
Page 48: ...268XA Service Manual 1 32 ...
Page 96: ...268XA Service Manual 2 48 ...
Page 98: ...268XA Service Manual 3 2 ...
Page 106: ...268XA Service Manual 3 10 ...
Page 132: ...268XA Service Manual 5 2 ...
Page 194: ...268XA Service Manual 6 48 ...
Page 196: ...268XA Service Manual 7 2 ...
Page 204: ...268XA Service Manual 7 10 268X FINAL ASSEMBLY alg105f eps Figure 7 1 268XA Final Assembly ...
Page 207: ...Replaceable Parts Parts Lists 7 7 13 2680A DIO alg100f eps Figure 7 3 DIO Module ...
Page 209: ...Replaceable Parts Parts Lists 7 7 15 2680A FAI alg102f eps Figure 7 4 FAI Module ...
Page 211: ...Replaceable Parts Parts Lists 7 7 17 2680A PAI alg103f eps Figure 7 5 PAI Module ...
Page 214: ...268XA Service Manual 8 2 ...
Page 215: ...8 3 8 Schematic Diagrams Figure 8 1 Backplane PCA 2680A 4001 ...
Page 216: ...268XA Service Manual 8 4 Figure 8 1 Backplane PCA cont 2680A 1001 ...
Page 217: ...8 5 8 Schematic Diagrams Figure 8 2 Controller System Power PCA 2680A 4004 ...
Page 223: ...8 11 8 Schematic Diagrams Figure 8 3 Digital I O PCA 2680A 4006 ...
Page 224: ...268XA Service Manual 8 12 Figure 8 3 Digital I O PCA cont 2680A 1006 1 of 3 ...
Page 225: ...8 13 8 Schematic Diagrams Figure 8 3 Digital I O PCA cont 2680A 1006 2 of 3 ...
Page 226: ...268XA Service Manual 8 14 Figure 8 3 Digital I O PCA cont 2680A 1006 3 of 3 ...
Page 227: ...8 15 8 Schematic Diagrams Figure 8 4 Backplane Extender PCA 2680A 4009 ...
Page 228: ...268XA Service Manual 8 16 Figure 8 4 Backplane Extender PCA cont 2680A 1009 ...
Page 229: ...8 17 8 Schematic Diagrams Figure 8 5 Extender PCA 2680A 4010 ...
Page 230: ...268XA Service Manual 8 18 Figure 8 5 Extender PCA cont 2680A 3010 ...
Page 231: ...8 19 8 Schematic Diagrams Figure 8 6 A D Supply Assembly 2680A 4031 ...
Page 232: ...268XA Service Manual 8 20 Figure 8 6 A D Supply Assembly cont 2680 1031 ...
Page 233: ...8 21 8 Schematic Diagrams Figure 8 7 PCMCIA PCA 2680A 4041 ...
Page 234: ...268XA Service Manual 8 22 Figure 8 7 PCMCIA PCA cont 2686 1041 ...
Page 235: ...8 23 8 Schematic Diagrams Figure 8 8 Output PCA 2680A 4062 ...
Page 236: ...268XA Service Manual 8 24 Figure 8 8 Output PCA cont 2680A 1062 ...
Page 237: ...8 25 8 Schematic Diagrams Figure 8 9 A D PFE PCA 2640A 4003 ...
Page 238: ...268XA Service Manual 8 26 Figure 8 9 A D PFE PCA cont 1 of 6 ...
Page 239: ...8 27 8 Schematic Diagrams Figure 8 9 A D PFE PCA cont 2 of 6 ...
Page 240: ...268XA Service Manual 8 28 Figure 8 9 A D PFE PCA cont 2640A 1003 3 of 6 ...
Page 241: ...8 29 8 Schematic Diagrams Figure 8 9 A D PFE PCA cont 2640A 1003 4 of 6 ...
Page 242: ...268XA Service Manual 8 30 Figure 8 9 A D PFE PCA cont 2640A 1003 5 of 6 ...
Page 243: ...8 31 8 Schematic Diagrams Figure 8 9 A D PFE PCA cont 2640A 1003 6 of 6 ...
Page 244: ...268XA Service Manual 8 32 Figure 8 10 A D FFE PCA 2645A 4003 ...
Page 245: ...8 33 8 Schematic Diagrams Figure 8 10 A D FFE PCA cont 2645A 1003 1 of 6 ...
Page 246: ...268XA Service Manual 8 34 Figure 8 10 A D FFE PCA cont 2645A 1003 2 of 6 ...
Page 247: ...8 35 8 Schematic Diagrams Figure 8 10 A D FFE PCA cont 2645A 1003 3 of 6 ...
Page 248: ...268XA Service Manual 8 36 Figure 8 10 A D FFE PCA cont 2645A 1003 4 of 6 ...
Page 249: ...8 37 8 Schematic Diagrams Figure 8 10 A D FFE PCA cont 2645A 1003 5 of 6 ...
Page 250: ...268XA Service Manual 8 38 Figure 8 10 A D FFE PCA cont 700p29_topress zip 2645A 1003 6 of 6 ...
Page 251: ...8 39 8 Schematic Diagrams Figure 8 11 Analog Input Connector PCA 2620A 4004A ...
Page 252: ...268XA Service Manual 8 40 2620A 1004 Figure 8 11 Analog Input Connector PCA cont ...
Page 253: ...8 41 8 Schematic Diagrams Figure 8 12 Display PCA 1 of 1 ...
Page 254: ...268XA Service Manual 8 42 Figure 8 12 Display PCA cont 1 of 1 ...