Rosemount 755 Instruction Manual

After the calibration procedure of Section 3.2, admit sample gas to the analyzer at the same pressure and the same flow rates as used for the downscale and upscale gases. The instrument will now continuously indicate the oxygen content of the sample gas. If desired, the % RANGE Switch may be moved to a setting of lower sensitivity, i.e., of wider span, than was used during calibration. At this time an adjustment of instrument response time via R20 (Figure 3-1) may be desirable to obtain the optimum compromise be ...

the alarm setpoint adjustments. 4. Connect an ohmmeter to relay terminals on 638254 Alarm Relay Assembly to verify when alarms have been energized. 5. Calibration of ALARM 1, HIGH. a. Rotate setpoint adjustment, R64, fully counter-clockwise. b. Adjust SPAN control to give a display or recorder reading exactly fullscale. If the fullscale setting cannot be reached, set to a reading higher than the desired alarm setpoint. c. Set ALARM 1 calibration adjustmen ...

iv 748183-H Rosemount Analytical November 1997 SECTION 7. SERVICE AND MAINTENANCE 7.1 INITIAL CHECKOUT WITH STANDARD GASES.................................... 7-1 7.2 CHECKOUT AT TEST POINTS ON CASE CIRCUIT BOARD................. 7-2 7.3 DETECTOR COMPONENT CHECKOUT ................................................ 7-4 7.3.1 Detector ..................................................................................... 7-4 7.3.2 Source Lamp .............................................................................. 7-4 7.3.3 Photocell......... ...

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 ...