Rosemount 755R Instruction Manual

6-13 Model 755R Oxygen Analyzer FIGURE 6-8. SIMPLIFIED ANALOG RECORDER OUTPUT CIRCUIT R84 20K C46 .1uF TP18 R88 500 To Recorder - + U13 FROM U10 1 2.5 5 50 R85 2M 100 - + U16 1V R57 3.83K E3 E4 5V E1 E2 R58 909 E5 E6 R59 90.9 E7 E8 100mV 10mV R60 10 C55 .1uF R102 40K 10 25 R86 80K R52 200K R87 400K R53 800K R82 2M To Alarm and V/I Recorder Span (Jumper Selectable) Recorder Output (Jumper Selectable) R50C 20K R50B 20K R50A 20K ...

3-4 June 1997 Rosemount Analytical 748213-P Model 755R Oxygen Analyzer RANGE % OXYGEN RECOMMENDED ZERO STANDARD GAS RECOMMENDED SPAN STANDARD GAS 0 to 1 Nitrogen 0.9% O2, balance N2 0 to 2.5 Nitrogen 2.3% O2, balance N2 0 to 5 Nitrogen 4.5% O2, balance N2 0 to 10 Nitrogen 9% O2, balance N2 0 to 25 Nitrogen Air (20.93% O2) 0 to 50 Nitrogen 45% O2, balance N2 0 to 100 Nitrogen 100% O2 TABLE 3-1. CALIBRATION RANGE FOR VARIOUS ZERO-BASED OPERATING RANGES 3.5.1 OXYGEN EQUIVALENT VALUE OF GASES For computation of background corrections, the analyzer respo ...

3-2 June 1997 Rosemount Analytical 748213-P Model 755R Oxygen Analyzer to perform span calibration on a range of higher sensitivity (i.e., more narrow span) and then move the jumper to the desired operating range. For example, if the operating range is to be 0 to 50% oxygen, span calibration may be performed on the 0 to 25% range to permit use of air as the span standard gas. 3.4.1 CALIBRATION WITH ZERO AND SPAN STANDARD GASES Note: The same flow rate must be maintained for zero, span, and sample to avoid measure error. The exhaust is vented to the ...

Model 755R Oxygen Analyzer 5.3.4 ISOLATED CURRENT OUTPUT BOARD (OPTIONAL) An isolated current output is obtainable by insertion of an optional plug-in circuit board into receptacle J1 on the Control Board (see Figure 3-1). The current outputs available by this board are 0 to 20 mA or 4 to 20 mA. ...