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HYDRA
Service Manual
2A-2
2A-46. Totalizer Input .............................................................................2A-19
2A-47. External Trigger Input Circuits....................................................2A-20
2A-48. A/D Converter PCA.........................................................................2A-20
2A-49. Analog Measurement Processor ..................................................2A-20
2A-50. Input Protection ...........................................................................2A-24
2A-51. Input Signal Conditioning............................................................2A-25
2A-57. Passive and Active Filters............................................................2A-30
2A-58. A/D Converter .............................................................................2A-30
2A-59. Inguard Microcontroller Circuitry...............................................2A-32
2A-60. Channel Selection Circuitry.........................................................2A-32
2A-61. Open Thermocouple Check.........................................................2A-32
2A-62. Input Connector PCA.......................................................................2A-33
2A-63. Display PCA ....................................................................................2A-33
2A-64. Main PCA Connector ..................................................................2A-33
2A-65. Front Panel Switches ...................................................................2A-34
2A-66. Display.........................................................................................2A-34
2A-67. Beeper Drive Circuit....................................................................2A-34
2A-68. Watchdog Timer and Reset Circuit .............................................2A-35
2A-69. Display Controller .......................................................................2A-35
2A-70. Memory Card Interface PCA...........................................................2A-37
2A-71. Main PCA Connector ..................................................................2A-38
2A-72. Microprocessor Interface.............................................................2A-38
2A-73. Memory Card Controller .............................................................2A-38
2A-74. PCMCIA Memory Card Connector.............................................2A-39