Setra System Model 547 - Manual (Page 5)

High Temperature Pressure Measurement : Possible using a length of piping or a "syphon" to
isolate the instrument from the hot media. Since there is no flow, the temperature drop along the tubing
is considerable and usually a relatively short length is sufficient to bring the pressure media temperature
within acceptable limits for the instrument. Alternatively a temperature isolator, part number GA33, can
be fitted (G¼ connection only). Pressure media must not be allowed to solidify in the tube and/or
pressure port.
ELECTRICAL INSTALLATION
All types include suppression devices providing transient protection to EN 61000-4-2 and EN 61000-
4-4.
For all types conformity with the requirements of the CE mark only applies when
connection is made with Setra Systems approved cable, See APPROVED CABLE
section, and the shield of that cable is connected to a reliable grounding point at the
instrumentation end.
APPROVED CABLES
Setra Systems uses cable comprising 7 color-coded wires, with a central vent tube, enclosed by an
aluminium/polyester screen where the screen is in intimate contact with a separate drain wire. The outer
sheath material is Polyurethane (immersible, +50°C). Other sheath materials available on request for
harsh environments.
OPERATION
Having installed the transducer as instructed it is ready for use. The transducer should not be removed
while the system is at pressure. Before applying power, check that the correct polarity and excitation
levels are being applied. See ELECTRICAL REQUIREMENTS.
OPERABLE TEMPERATURE RANGE
Cable Versions: -4°F to +122°F (-20°C to +50°C)
Connector Versions: -13°F to +185°F (-25°C to +85°C)
Process Media (connector version only): -22°F to +212°F (-30°C to +100°C)
OPERATIONAL LIFE:
Limited to 3 million full scale cycles.
CALIBRATION
Transducers are calibrated to the range requested at time of order.
G - gauge datum vented to atmosphere via the electrical connection
A - absolute datum
S - sealed reference; reference side of the instrument is sealed and the output
electrically adjusted to zero with 14.69 psi (1013mb) applied to pressure port