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Instruction Manual
760008-A
September 2001
4-4 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 TO2
possible leakage caused by damage in
shipment.
1. If not already removed from the
analyzer, remove the top cover of
the analyzer module and locate and
remove the five mounting screws
which hold the Sensor Assembly
(Sensor, flowmeter, plumbing) to the
module. Care should be taken not
to lose the screws as they have
metric threads.
2. Carefully lift out the Sensor Assem-
bly. Place on a flat surface and re-
move the black Sensor cover by
unscrewing clockwise.
3. Refill the the Sensor per Section 4-
2a, steps 2 through 5.
4. Allow the Sensor to stand for ap-
proximately 15 minutes, then check
for leaks around the base of the
reservoir, at seams and corners.
5. If a leak is found, drain the Sensor.
Contact the factory before proceed-
ing.
6. If no leaks are detected drain the
Sensor, refill with one bottle of elec-
trolyte. Use the entire contents of
the bottle.
NOTE
Do not add water. The volumn and
concentration of the bottled electrolyte
is pre-measured.
7. Reinstall the black Sensor cover
and carefully install the Sensor into
the Analyzer Module.
NOTE
Do not tilt Sensor excessively as elec-
trolyte may leak.
4-3 LINEARIZATION
After installation of a new Sensor, it will be
necessary to load the new calibration data
supplied with the Sensor.
NOTE
It is not necessary to load lineariza-
tion data on a new analyzer which
has been filled with electrolyte. The
data is pre-loaded at the factory.
The data supplied with the new Sensor and
must be entered exactly as shown the the Se-
nosr data sheet.
From the Main Menu
Slect Analyzer and I/O expert controls &
setup…
Select Analyzer module controls… or Ana-
lyzer module setup…
TO2 37.50 ppm
Measure
Lock…
-- Main Menu --
Analyzer basic controls (calibration) & setup…
Analyzer and I/O expert controls & setup…
System configuration and diagnostics…
Display controls…
Time & Date: 14:01:45 03 November 2000
System tag: Fisher-Rosemount
Channel
Status… MFG Data
TO2 37.50 ppm
-- Anal
y
zer and I/O Ex
p
ert Controls and Setu
p
--
Analyzer module controls…
System & network I/O module controls…
Analyzer module setup…
System & network I/O module setup…
(Note: Controls & setup are identical for MLT/FID)
Measure Back…
Channel