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34-ST-03-64
Page 10
Performance Under Rated Conditions * - Model STR14A (0-5 to 0-500 psia)
Parameter Description
Upper Range Limit ** psia
bar absolute
500
35
Minimum Span psia
bar absolute
5
0.35
Turndown Ratio
100 to 1
Zero Elevation and Suppression
No limit except minimum span from 0 to 100% URL.
Accuracy (Reference – Includes
combined effects of linearity,
hysteresis, and repeatability)
•
Accuracy includes residual error
after averaging successive
readings.
• For FOUNDATION Fieldbus use
Digital Mode specifications. For
HART use Analog Mode
specifications.
In Analog Mode:
±0.1% of calibrated span or upper range value (URV), whichever is
greater.
For URV below reference point (20 psi), accuracy equals:
±0.05 + 0.05
()
20 psi
span psi
or ±0.05 + 0.05
()
1.4 bar
span bar
in % of span
In Digital Mode: ±0.075% of calibrated span or upper range value (URV), whichever is
greater.
For URV below reference point (20 psi), accuracy equals:
±0.025 + 0.05
()
20 psi
span psi
or ±0.025 + 0.05
()
1.4 bar
span bar
in % of span
* Performance specifications are based on reference conditions of 25°C (77°F), zero (0) static pressure, 10 to 55% RH, and
316L Stainless Steel barrier diaphragm.
** Transmitter URL limit or maximum seal pressure rating, whichever is lower.
Performance Under Rated Conditions – General for all Models
Parameter Description
Output (two-wire)
Analog 4 to 20 mA or digital communications DE mode. Options available for
F
OUNDATION Fieldbus and HART protocol.
Supply Voltage Effect
±0.005% of span per volt.
Damping Time Constant
Adjustable from 0 to 32 seconds digital damping.
RFI Protection (Standard)
Negligible (20 to 1000 MHz at 30 volts per meter).
CE Conformity (Europe)
89/336/EEC, Electromagnetic Compatibility (EMC) Directive.
NAMUR NE 43 Compliance
Option
Transmitter failure information is generated when the measuring information is invalid or
no longer present. Failure information is transmitted as a current signal but outside the
normal 4-20 mA measurement signal level. Transmitter failure values are: ≤ 3.6 mA and
≥ 21.0 mA. The normal signal range is ≥ 3.8 mA and ≤ 20.5 mA.
SIL 2/3 Compliance
SIL certified to IEC 61508 for non-redundant use in SIL 2 related Safety Systems
(single use) and for redundant (multiple) use in SIL 3 Safety Systems through
TÜV Nord Sys Tec GmbH & Co. KG under the following standards: IEC61508-1: 1998;
IEC 61508-2: 2000; IEC61508-3: 1998.