Copyright ©1998-2004:
AMKO Systems Inc.
All rights reserved.
ASI RS-57 THC ANALYZER
The new AMKO
Systems Inc. (ASI) RS 57 is a logical progression of our traditional THC analyzer. It is
used for continuous measurement of organic total hydrocarbons in gaseous media and
designed for hands-off operation of this labour-intensive monitoring application. The RS
57 provides unsurpassed accuracy and reliable performance. It features user-adjustable
automatic calibration, automatic range changes, logic-controlled back-pressure regulator,
and 100% response within 1 second. The ASI RS 57 meets with all appropriate guidelines set
by the Environmental Protection Agency (EPA).
Common applications for the RS 57 are in the field of:
 |
Immission diagnosis |
|
Emission measurement (EPA) |
|
OSHA - jobsite measurement |
|
LEL (Lower Explosive Limit) control in production processes |
|
Exhaust analysis of internal combustion engines (alternate fuels) |
|
Optimizing of industrial processes |
I. Function
The ASI RS 57 analyzer is equipped with a number of control functions to expand applications and facilitate easy operation. Operation with automatic calibration is as simple as depressing four keys on the front panel: "ON", "PUMP", "ANALYZER", and "AUTO CAL". It now heats up, reaches operating temperature, ignites the Flame Ionization Detector (FID), after which it calibrates itself ... All Automatically. That is all for problem-free, hands-off, and accurate continuous measurement. The frequency for automatic calibration is user-adjustable at intervals of 1 to 99 hours.
II. Self Controlling
Each parameter of the ASI RS 57, such as oven temperature, combustion gas pressure, combustion air pressure and sample pressure is controlled automatically to tight tolerance limits with an extensive array of sensors. Alarm is initiated if set points are unbalanced.
III. Measurement and Output
Measurement ranges are switched automatically from 0 to 10/100/1000/10,000/100,000 ppm and indicated by both the digital display LED and relay contacts. Output is 0 or 4 - 20 mA and 0 - 10 V.
IV. Analyzer
All sample-wetted parts in the RS 57 are heated, with the oven temperature being user-adjustable to 200° C. This heating prevents condensation of water, corrosives and hydrocarbons with a high boiling point.
V. Measurement Principle
Flame Ionization Detection (FID) is based on the ionization of organic hydrocarbons in a hydrogen flame. The burner is fed a constant volume of sample gas, which is mixed with hydrogen before reaching the burner. Additional mixing with zero-air results in extremely high combustion temperature of the sample gas. The positively charged ions formed by this combustion process are discharged at the electrodes of the FID. The resultant current signal is amplified and read as the measurement signal, THC. The combustion of Carbon atoms in a specified period is proportional to the current of all organic hydrocarbons and makes the recording of accurate measured values possible.