Ametek AMEVision 3050-TE, Руководство пользователя

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Overview
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Controller Communication
All analyzer functions are controlled by a microprocessor housed within the smart
sensor. Communication with the smart sensor is achieved through the following
connections:
• One analog input, 4 to 20 mA
• One analog output, 4 to 20 mA, isolated. Can be either loop powered or powered
by the analyzer.
• Two alarm contacts, (dry relay contacts)
• One RS-232 serial port
• One RS-485 serial port.
The 3050 has no local user programming functions. It requires serial communication
with an external PC for configuration. Once configured, the analyzer is capable of
stand alone operation. The analyzer is factory configured and packaged with con-
figurator software for initial setup of operating parameters. User provided software
may also be used with the 3050 serial ports.
Verification
The 3050 has a built-in moisture generator for on board verification. A portion of
the dry reference gas flows through the moisture generator where a known amount
of moisture is added. When cell verification is initiated, the QCM sensor is al-
ternately exposed to gas from the moisture generator and dry reference gas. The
moisture value is compared to a stored value. The sensor can make an adjustment
if the value is within a tolerance band. If the value is outside the tolerance band, an
alarm will activate.
Since the moisture generator uses a dried portion of sample gas, sensor verification
is preformed on a sample of the process gas. This yields the most realistic test of the
sensors performance under process conditions.
Gas Flow
Normal operation of the 3050 includes an internal bypass, which increases the re-
sponse speed of the system; however, the 3050 is capable of running in a gas saver
mode which allows the analyzer to run on a sample volume of 150 SCCM.