Instruction Manual
106-300NFX Rev. 4.2
January 2002
3-10 Setup and Operation Rosemount Analytical Inc. A Division of Emerson Process Management
World Class 3000
initiates the calibration at a fixed cali-
bration interval. In this mode the op-
erator can also manually initiate
calibrations between the intervals in
the same manner as semiautomatic
calibrations.
c. Manual (Semiautomatic) Calibration
1. Test Gases for Manual (Semiauto-
matic) Calibration. There are two op-
tions for supplying test gases to the
probe during semiautomatic calibration.
The first "A" uses refillable bottles and
adjustable 2-stage pressure regulators;
the second, "B" uses disposable bot-
tles and a fixed single-stage regulator
to provide a mixed flow. Normally, the
first (method "A") will have a higher
cost and not be portable. The
second ("B") is less costly, portable,
and weighs about 4.54 kg (10 lbs).
Test Method "A" Fixed Tanks and
Manifolds.
(a) Required Equipment.
Do not use 100% nitrogen as a zero
gas. It is suggested that gas for the
zero be between 0.4% and 2.0% O
2
. Do
not use gases with hydrocarbon con-
centrations of more than 40 parts per
million. Failure to use proper gases
will result in erroneous readings.
1 Two tanks of precision cali-
bration gas mixtures. Rec-
ommended calibration gases
are nominally 0.4 percent and
8.0 percent oxygen in nitro-
gen.
Two sources of calibrated gas
mixtures are:
LIQUID CARBONIC GAS
CORP. SPECIALTY GAS
LABORATORIES
700 South Alameda Street
Los Angeles, California
90058
213/585-2154
767 Industrial Road
San Carlos, California 94070
415/592-7303
9950 Chemical Road
Pasadena, Texas 77507
713/474-4141
12054 S.W. Doty Avenue
Chicago, Illinois 60628
312/568-8840
603 Bergen Street
Harrison, New Jersey 07029
201/485-1995
255 Brimley Road
Scarborough, Ontario,
Canada
416/266-3161
SCOTT ENVIRONMENTAL
TECHNOLOGY, INC.
SCOTT SPECIALTY GASES
2600 Cajon Blvd.
San Bernardino, CA 92411
714/887-2571
TWX: 910-390-1159
1290 Combermere Street
Troy, MI 48084
314/589-2950
Route 611
Plumsteadville, PA 18949
215/766-8861
TWX: 510-665-9344
2616 South Loop West,
Suite 100
Houston, TX 77054
713/669-0469
2 A check valve is required at
the probe (between the cali-
bration fitting and the gas line)
to prevent the migration of
process gases down the cali-
bration gas line.
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