Instruction Manual

245364-V May 2002

6 Digit LCD Display

Model 755A

ZERO

 

SPAN

 

PRESS CAL1

PRESS CAL 2

NORM

REC OFFSET

ZERO Adjust

SPAN Adjust

TEST Switch

Rosemount Analytical

 

M o d e l 7 5 5 A

O x y g e n A n a l y z e r

 

CONTROL

FUNCTION

 

Digital Display (LCD)

Readout of sample oxygen content (0.00% to 100.00%) or selected test function,

depending on position of TEST switch.

 

 

 

 

TEST Switch (S1)

Selects variable desired for readout on digital display.

 

 

Switch Position

Readout on Digital Display

Designation

1

Oxygen content of sample (0.00% to 100.00%)

NORM

 

 

 

 

 

2

Pressure/Voltage CAL 1

CAL 1

3

Pressure/Voltage CAL 2

CAL 2

 

 

 

 

4

Zero suppression applied to analog output circuit

ZERO SUPPRESSION

(0.00 to 10.00 VDC)

 

 

 

 

 

Used to establish downscale calibration point on digital display or recorder chart.

ZERO Control (R13)

With suitable downscale standard gas flowing through the analyzer, the ZERO

 

 

Control is adjusted for appropriate reading on display.

 

 

 

Used to establish upscale calibration point on digital display or recorder chart. With

SPAN Control (R16)

suitable upscale standard gas flowing through the analyzer, the SPAN Control is

 

 

adjusted for appropriate reading on display or recorder.

 

 

 

Figure 3-1. Model 755A Front Panel Controls

 

3-2

Operation

Rosemount Analytical Inc. A Division of Emerson Process Management