34-SM-03-01
Page 10
SMV 3000 Specifications, continued
Performance Under Rated Conditions - Differential Pressure Measurement - SMA125
Parameter Description
Upper Range Limit
±400 inH
2
O (1000 mbar) at 39.2 °F (4 °C) standard reference temperature for
inches of water measurement range.
Turndown Ratio
±400 to 1
Minimum Span
±1 inH
2
O (2.5 mbar)
Zero Elevation and Suppression
No limit (except minimum span) with ±100% URL.
Accuracy (Reference – Includes com-
bined effects of linearity, hysteresis, and
repeatability)
• Applies for model with Stainless Steel
barrier diaphragms
• Accuracy includes residual error after
averaging successive readings.
In Analog Mode: ±0.10% of calibrated span or upper range value (URV),
whichever is greater, - Terminal based.
For URV below reference point (25 inH
2
O), accuracy equals:
±0.025 ± 0.075
25 inH
2
O
span inH
2
O
or ±0.025 ± 0.075
()
62 mbar
span mbar
in % span.
In Digital Mode: ±0.075% of calibrated span or upper range value (URV),
whichever is greater, - Terminal based.
For URV below reference point (25 inH
2
O), accuracy equals:
±0.0125 ± 0.0625
25 inH
2
O
span inH
2
O
or ±0.0125 ± 0.0625
()
62 mbar
span mbar
in %
span.
Zero Temperature Effect per 28°C
(50°F)
• Applies for model with Stainless Steel
barrier diaphragms
In Analog Mode: ±0.1125% of calibrated span.
For URV below reference point (50 inH
2
O), effect equals:
±0.0125 ± 0.10
50 inH
2
O
span inH
2
O
or ±0.0125 ±0.10
()
125 mbar
span mbar
in % span
In Digital Mode: ±0.10% of calibrated span.
For URV below reference point (50 inH
2
O), effect equals:
±0.10
50 inH
2
O
span inH
2
O
or ±0.10
()
125 mbar
span mbar
in % span.
Combined Zero and Span Temperature
Effect per 28°C (50°F)
• Applies for model with Stainless Steel
barrier diaphragms
In Analog Mode: ±0.2625% of calibrated span.
For URV below reference point (50 inH
2
O), effect equals:
±0.1625 ± 0.10
50 inH
2
O
span inH
2
O
or ±0.1625 ±0.10
()
125 mbar
span mbar
in % span
In Digital Mode: ±0.225% of calibrated span.
For URV below reference point (50 inH
2
O), effect equals:
±0.125 ± 0.10
50 inH
2
O
span inH
2
O
or ±0.125 ±0.10
()
125 mbar
span mbar
in % span
Zero Static Pressure Effect per 1000
psi (70 bar)
• Applies for model with Stainless Steel
barrier diaphragms
±0.24% of calibrated span.
For URV below reference point (50 inH
2
O), effect equals:
±0.05 ± 0.19
50 inH
2
O
span inH
2
O
or ±0.05 ± 0.19
()
125 mbar
span mbar
in % span.