Instruction Manual

IB-106-300NH Rev. 4.3 May 2005

World Class 3000

2. Calibration Methods

Test Method "A" Fixed Tanks and

 

Manifolds

There are three calibration methods: manual (semiautomatic), manually ini- tiated automatic, and fully automatic. Manual (semiautomatic) calibration is done without an MPS unit. Calibration gases are switched on and off by the operator and the IFT is sequenced through the calibration procedure by the operator with the front panel key- board. The IFT prompts the operator for the correct action. Manually initiated automatic calibration is done with an MPS. The operator manually initiates the calibration at the IFT or through a remote switch, and the IFT controls the operation of the MPS unit and the cali- bration sequencing. Fully automatic calibration requires no action from the operator. The setup is the same as semiautomatic except the IFT auto- matically initiates the calibration at a fixed calibration interval. In this mode the operator can also manually initiate calibrations between the intervals in the same manner as semiautomatic calibrations.

c.Manual (Semiautomatic) Calibration

1.Calibration Gases For Manual (Semiautomatic) Calibration

There are two options for supplying calibration gases to the probe during semiautomatic calibration. The first "A" uses refillable bottles and adjustable 2- stage pressure regulators; the second "B" uses disposable bottles 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 10 lbs (4.5 kg).

(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% O2. 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.

NOTE

Ambient air is not recommended for use as high calibration gas. An 8% O2 balance in nitrogen is recommended for high calibration gas.

1Two tanks of precision cali- bration gas mixtures. Rec- ommended calibration gases are nominally 0.4% and 8.0% oxygen in nitrogen.

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

4-2 Calibration

Rosemount Analytical Inc. A Division of Emerson Process Management

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Emerson 3000 instruction manual Calibration Methods, Liquid Carbonic GAS Corp Specialty GAS Laboratories
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3000 specifications

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