VICI 500 Dynacalibrator - Manual (Page 8)


The Model 500 has four modes of operation – ZERO, SPAN 1, SPAN 2, and Both
SPAN 1 and SPAN 2. When the calibrator mode is changed to ZERO, SPAN 1, or
SPAN 2, a two position valve in the calibrator interrupts the sample input and
substitutes the calibrator output to the analyzer.
ZERO (neither SPAN 1 nor SPAN 2 on), SPAN 1, SPAN 2, and SPAN 1 + SPAN 2 can
provide three points of calibration along with a zero reference. The ZERO mode
vents the outputs from the permeation chamber through an exhaust port so that
only the dilution stream passes through the mixing tee to the stream outlet port
and into the analyzer for zero point calibration.
The SPAN 1 mode mixes the carrier stream with the dilution stream from a high-
flow control valve and flowmeter for low output concentrations of the trace
gas. In the SPAN 2 mode, a low-flow control valve and flowmeter are substituted
for the high flow components in the dilution stream to produce high output
concentrations of the trace gas. Front panel access to the control valves for each
of the two dilution flow-meters permits the user to accurately set both a low and
high output concentration and switch between them and zero air for the three-
point check.
Options
The following paragraphs provide general information on each, with more
detailed information found in “Advanced Theory of Operation” on page 24.
Input Configurations
The Dynacal 500 series is available with either single or dual gas supply. Both
plumbing configurations rely on external feed gas supplies and regulators. The
two gas inlet system allows for different gases to be used for carrier and dilutent.
Both systems are available with nominal maximum flow capacities from 1 to 20
liters per minute.
Rack Mount Options
The standard Dynacalibrator is packaged in a free-standing case with carrying
handles, for bench use. The units may also be packaged for mounting in a
standard 19" equipment rack.
Special Customer Options
Special options, identified by the “S” at the end of the model number, are not
covered in this basic manual. If your Dynacalibrator is equipped with a special
option, the required additional information will be found on the Special Option
Sheets in the back of this manual. The Special Option Sheets carry the serial
number of the Dynacalibrator to which they apply.
Introduction