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Sierra Instruments Instruction Manual
Smart-Trak
®
2 Series 100
12
Pre-Installation Check List
1.
Double-check to be sure that the O-ring material used in your
instrument is compatible with the gas to be measured.
The O-ring
material used in your Smart-Trak 2 can be found in the Data Label. See
Appendix A for a table of elastomer compatibility with a wide variety of
gases.
2.
Sierra strongly recommends you install an in-line filter upstream of the
instrument.
Recommended filter size: 10 micron. A 10 micron filter is
available from Sierra as an accessory. See Appendix B or contact your local
Sierra distributor.
3.
Do not locate the instrument in areas subject to sudden temperature
changes, excessive moisture or near equipment radiating significant
amounts of heat.
Be sure to allow adequate space for cable connectors and
wiring.
4.
For controllers, use a properly sized pressure regulator.
Make sure the
pressure regulator is not too small or too big. There can be no restrictions
(such as valves, tubing or pipe internal diameters, reducers, etc.) upstream or
downstream of the controller with a dimension that is less than the valve
orifice diameter. To determine orifice diameter, consult the calibration
certificate included with your instrument. If restricted, controller will not
reach full scale.
5.
Output Signals:
The Smart-Trak 2 has two analog outputs that are linearly
proportional to the gas mass flow rate, one voltage and one current. Choose
from 0-20 mA or 4-20 mA for current plus one voltage signal: 0-5 VDC or
0-10 VDC or 1-5 VDC. The output signals specified at time of order will be
indicated on the data label. You may change among the current and the
voltage output signal at your discretion after receipt of the instrument using
the Pilot Module or the Smart-Trak 2 Software (see Chapters 4 & 5).
Changing the output signals has no influence on the instrument’s accuracy.
6.
The CAT-5
connector on the side of the Smart-Trak 2 is NOT an Ethernet
connector. It is for use with the optional Remote Pilot Module. Do not plug
an Ethernet cable here as damage may result. Keep this connector covered if
possible whenever it is not in use.
7.
The instrument has specific power supply requirements.
See the table
later in this chapter for a complete listing of power requirements.
Installing the Instrument—Plumbing
Smart-Trak 2
instruments are supplied with compression, VCO
®
, VCR
®
, or female
NPT process connections. To ensure a successful installation, inlet and outlet tubing