Справочник Пользователя для Sierra 840
Chapter 2 Installation
Series 830/840/860 Instruction Manual
2-2
IM-83/84/86-H
Installation Overview
Side-Trak
™
and Auto-Trak
™
transducers are supplied with either
compression, VCO, VCR or NPT process connections. To ensure a
successful installation, inlet and outlet tubing should be in a clean
state prior to plumbing the transducer into the system. The ship-
ping caps covering the inlet/outlet fittings should not be removed
until immediately prior to installation.
Before installing the transducer, verify the following:
successful installation, inlet and outlet tubing should be in a clean
state prior to plumbing the transducer into the system. The ship-
ping caps covering the inlet/outlet fittings should not be removed
until immediately prior to installation.
Before installing the transducer, verify the following:
1. Make sure the installation site meets the specific operating pa-
rameters recorded on the transducer’s nameplate. Each trans-
ducer is factory-configured for a specific gas and flow range,
pressure differential, temperature range and mounting position.
ducer is factory-configured for a specific gas and flow range,
pressure differential, temperature range and mounting position.
2. Do not locate the transducer in areas subject to sudden tem-
perature changes, moisture, drafts or near equipment radiating
significant amounts of heat. Make sure to allow adequate space
for cable connectors and wiring.
significant amounts of heat. Make sure to allow adequate space
for cable connectors and wiring.
3. Make sure the location meets the minimum number of recom-
mended pipe diameters upstream and downstream of any NPT
or 1/2-inch process connection. A minimum of two inches is
always recommended.
or 1/2-inch process connection. A minimum of two inches is
always recommended.
4. If the gas contains any particulate matter, install an in-line fil-
ter prior to the transducer. Recommended filter size: 15 mi-
cron for flows of 10 to 30 slpm, 30 micron for above 30 slpm.
cron for flows of 10 to 30 slpm, 30 micron for above 30 slpm.
5. If the transducer is mounted in any position other than horizontal
and it was not calibrated specifically for that position, contact Si-
erra’s Customer Service Department for instructions.
erra’s Customer Service Department for instructions.
6. For meters, if a potential over-flow condition exists, insert a
valve or critical orifice in the line to limit flow to approxi-
mately 25 percent above the full scale range of the meter.
mately 25 percent above the full scale range of the meter.
7. For controllers, use a properly-sized pressure controller and
verify the controller orifice size is the smallest in the system.
There can be no restrictions (such as valves, tubing or piping
internal diameters, reducers, etc.) upstream or downstream of
the controller less than the valve orifice diameter.
There can be no restrictions (such as valves, tubing or piping
internal diameters, reducers, etc.) upstream or downstream of
the controller less than the valve orifice diameter.
8. Confirm that the transducer o-ring material is compatible with
the gas to be measured.