Rosemount 755A Instruction Manual

7-6 April 2000 Rosemount Analytical 245364-U Model 755A Oxygen Analyzer Two Red or Two Black Leads Red Blue Brown Yellow the magnet assembly. Carefully remove optical bench and detector assembly. 5. Remove the two lock screws (2-56 X 5/16 pan head) holding the photocell in the optical bench. Carefully remove photocell. 6. Loosen lamp retaining set screw, remove lamp. 7. Note location of lamp wires in connector J12. Disconnect leads of lamp assembly from connector J12, Figure 7-2A, using method shown in Figure 7-2C. Depending on date of man ...

Model 755A Oxygen Analyzer The basic electronic circuitry is incorporated into two master boards: The Control Board Assembly and the Case Circuit Board Assembly (see Figure 1-2). The Control Board has a receptacle which accepts optional circuit boards, thus permitting inclusion of such features as current output. 1.2 OXYGEN RANGE ON FRONT PANEL DIGITAL DISPLAY The front panel LCD (liquid crystal display) provides direct readout of oxygen concentration from 0.00% to 100.00%. 1.3 OXYGEN RANGES FOR RECORDER READOUT If ...

245364-U Rosemount Analytical April 2000 7-9 Model 755A Oxygen Analyzer CAUTION: OVERHEATING HAZARD Avoid prolonged operation with the decade box set at 22.2K ohms. Overheating may result. Set the decade box for 22.2K ohms to simulate RT1 resistance at ambient temperature. The voltmeter should now show pulses of 120 VAC. 7.4.2 DETECTOR/MAGNET HEATING CIRCUIT Heater HR1 is attached to the magnet. Heater HR2 is attached to the rear of the detector. Combined resistance of these two parallel connected heaters, as measured at pins 15 and 16 of ...

U.S.A. To obtain field service on-site or assistance with a service problem, contact (24 hours, 7 days a week): National Response Center 1-800-654-7768 INTERNATIONAL Contact your local Rosemount Sales and Service office for service support. FACTORY For order administration, replacement Parts, application assistance, on-site or factory repair, service or maintenance contract information, contact: Rosemount Analytical Inc. Process Analytical Division Customer Service Center 1-800-433-6076 RETURNING PARTS TO THE FACTORY Before returning p ...