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Instruction Manual
760008-A
September 2001
3-16 Operation Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 TO2
Span Calibration
Depending upon the nature of your appli-
cation, it may be beneficial to verify the
span calibration of the analyzer module
every 3-4 months. The following proce-
dure illustrates how to initiate a span cali-
bration.
Figure 3-17. Span Calibration
Introduce a suitable span gas to the analyzer
and allow the reading to stabilize.
Move the cursor to the “Span gas:” line and
press the ↵ key. Enter the correct span gas
value by using the ↑ and ↓ keys to adjust the
value and the ← and → keys to select the
digit. Press the ↵ key again to save the
value.
Move the cursor to the “Calibrate to span
gas!” line and press the ↵ key. The new span
calibration will be calculated.
TO2 37.50 ppm
-- Anal
y
zer Module Setu
p
and Controls --
Calibration…
Alarms…
Ranges…
Linearization…
Measurement display configuration…
Concentration measurement…
Flow measurement…
Temperature measurement…
Measure Back…
Status…
TO2 37.50 ppm
Measure
Back…
-- Calibration --
Gas scale factor…
Reset calibration!
Calibrate to span gas!
Span gas: 90.0 ppm
Status…
Main Menu
↓
Analyzer and I/O, expert controls and setup…
↓
Analyzer module controls… (Or Analyzer module setup…)
↓