Emerson 3081FG - Manual (Page 45)

Instruction Manual
IB-106-3081 Rev. 1.5
September 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Startup and Operation 3-15
Model 3081FG
%
%
O CONCENTRATION
2
LOW CALIBRATION
CHECK GAS O VALUE
2
26020056
Figure 3-29. ACCEPT LOW O
2
d. SLOPE
Refer to Figure 3-30. Use this screen to ex-
amine the slope calculated from current
calibration check. The slope is the amount
of cell voltage generated for a given O
2
value. After each calibration check, record
the slope over the life of the probe. Tracking
the slope will indicate if the probe is de-
grading. Press NEXT to access the CON-
STANT screen.
%
O CONCENTRATION
2
CALCHECK CELL
SLOPE VALUE
26020057
Figure 3-30. SLOPE
e. CONSTANT
Refer to Figure 3-31. Use this screen to ex-
amine the cell zero constant calculated from
the current calibration check. The constant
represents the voltage generated by the cell
when no difference exists between the
amount of O
2
on the reference and process
sides of the cell. Note this value for com-
parison against future calibration checks.
Press RESET or EXIT to return to the
PROCESS DISPLAY screen.
%
O CONCENTRATION
2
CALCHECK CELL
CONSTANT VALUE
26020058
Figure 3-31. CONSTANT
3