VICI 500 Dynacalibrator - Manual (Page 5)


Introduction
General Description
VICI Metronics Dynacalibrators ® use Dynacal ® permeation devices to generate
the precise gas concentrations necessary for calibrating air pollution analyzers,
monitors, and other instruments that measure gas concentrations in the parts-
per-million range and lower.
Dynacalibrators are available in four models, each with a large variety of
optional features to fit a wide range of calibration requirements. All critical
factors, such as permeation rates, gas flow rates, and permeation chamber
temperatures are calibrated against standards traceable to the National Institute
of Standards and Technologies.
Model 500 specifications are listed on page 5.
Dynacal Permeation Devices
Metronics Dynacal permeation devices are the simplest and most reliable
method for supplying a source of trace quantities of various gases. They can
accommodate virtually any requirement for generating low concentrations of
gases. Permeation rates from thousands of ng/min down to fractional parts of a
ng/min are possible. The devices can be supplied filled with any one of hundreds
of different compounds, both organic and inorganic.
How to Use This Manual
This manual provides installation, operation, and maintenance information for
all configurations of the Model 500. The identification tag on the rear panel of
every Dynacalibrator is stamped with the unit’s complete model number, which
reflects the exact unit configuration. A chart on the last page of the manual
explains the model numbers.
Basic Design
The Model 500 contains three calibrated gas regulating systems – two carrier
systems and one dilution system. Each fixed flow carrier system includes a per-
meation chamber containing the permeation device. The temperature of each
chamber controls the permeation rate of the calibration gas from the perme-
ation device. Each chamber temperature is set and monitored at the front panel,
or remotely by serial communication. Each chamber temperature is adjustable
from 30°C (or 2°C above ambient, whichever is higher) to 110°C.
Each carrier stream can be selected independently, or both carriers can be added
together with the dilution stream. The dilution gas stream is pumped through
an adjustable valve and a flowmeter to the mixing tee for each carrier stream.
Front panel access to the valve and flowmeter permits the user to accurately
set the dilution stream flow rate that will be mixed with the selected carrier
stream(s), thereby controlling the concentration of the calibration gas available
at the outlet port of the calibrator