To Next Page

To Previous Page

Overview | 1-3

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

• 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 coniguration. Once conigured, the analyzer is capable of stand alone

operation. The analyzer is factory conigured and packaged with conigurator software for

initial setup of operating parameters. User provided software may also be used with the

3050 serial ports.

Veriication

The 3050 has a built-in moisture generator for on board veriication. A portion of the dry

reference gas lows through the moisture generator where a known amount of moisture is

added. When cell veriication is initiated, the QCM sensor is alternately 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 veriication is

performed 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 response

speed of the system; however, the 3050 is capable of running in a gas saver mode which al-

lows the analyzer to run on a sample volume of 150 SCCM.

Internal Timing

The analyzer operates in two timing modes. The normal mode consists of short intervals of

sample and reference gas. The sensor saver mode reduces the exposure of the sensor to the

sample gas by increasing the time spent on the dry reference.

If the analyzer detects abnormal degradation of sensor performance over time in the nor-

Ametek 3050-SLR User Manual

Questions and Answers: