34-SM-03-01
Page 9
SMV 3000 Specifications, continued
Performance Under Rated Conditions - Differential Pressure Measurement - SMA110
Parameter Description
Upper Range Limit
± 25 inH
2
O (62.5 mbar) at 39.2 °F (4 °C) standard reference temperature for
inches of water measurement range.
Turndown Ratio
25 to 1
Minimum Span
±1.0 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: ±0.125% of calibrated span or upper range value (URV),
whichever is greater, - Terminal based.
For URV below reference point (10 inH
2
O), accuracy equals:
±0.025 ± 0.1
10 inH
2
O
span inH
2
O
or ±0.025 ± 0.1
()
25 mbar
span mbar
in % span.
In Digital Mode: ±0.1% of calibrated span or upper range value (URV),
whichever is greater, - Terminal based.
For URV below reference point (10 inH
2
O), accuracy equals:
± 0. 1
10 inH
2
O
span inH
2
O
or ± 0. 1
()
25 mbar
span mbar
in % span.
Zero Temperature Effect per 28°C
(50°F)
• Applies for model with Stainless Steel
barrier diaphragms
In Analog Mode: ±0.525% of calibrated span.
For URV below reference point (10 inH
2
O), effect equals:
±0.025 ± 0.50
10 inH
2
O
span inH
2
O
or ±0.025 ±0.50
()
25 mbar
span mbar
in % span
In Digital Mode: ±0.5% of calibrated span.
For URV below reference point (10 inH
2
O), effect equals:
±0.50
10 inH
2
O
span inH
2
O
or ±0.50
()
25 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: ±0.675% of calibrated span.
For URV below reference point (10 inH
2
O), effect equals:
±0.175 ± 0.50
10 inH
2
O
span inH
2
O
or ±0.175 ±0.50
()
25 mbar
span mbar
in % span
In Digital Mode: ±0. 625% of calibrated span.
For URV below reference point (10 inH
2
O), effect equals:
±0.125 ± 0.50
10 inH
2
O
span inH
2
O
or ±0.125 ±0.50
()
25 mbar
span mbar
in % span
Stability (At Reference Conditions)
±1.0% of URL per year.
Damping Time Constant
Adjustable for 0 to 32 seconds digital damping.