34-SM-03-01
Page 11
Combined Zero and Span Static
Pressure Effect per 1000 psi (70 bar)
• Applies for model with Stainless Steel
barrier diaphragms
±0.1.04% of calibrated span.
For URV below reference point (50 inH
2
O), effect equals:
±0.85 ± 0.19
50 inH
2
O
span inH
2
O
or ±0.85 ± 0.19
()
125 mbar
span mbar
in % span.
Stability (At Reference Conditions)
±0.0625% of URL per year.
Damping Time Constant
Adjustable for 0 to 32 seconds digital damping.
Performance Under Rated Conditions - Differential Pressure Measurement - SMG170
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. Specifications valid from –5
to +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 (50 inH
2
O), accuracy equals:
±0.025 ± 0.075
50 inH
2
O
span inH
2
O
or ±0.025 ± 0.075
()
125 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 (50 inH
2
O), accuracy equals:
±0.0125 ± 0.0625
50 inH
2
O
span inH
2
O
or ±0.0125 ± 0.0625
()
125 mbar
span mbar
in %
span.
Zero Temperature Effect per 28°C
(50°F)
• Applies for model with Stainless Steel
barrier diaphragms
In Analog Mode: ±0.1375% of calibrated span.
For URV below reference point (100 inH
2
O), effect equals:
±0.0125 ± 0.125
100 inH
2
O
span inH
2
O
or ±0.0125 ±0.125
()
250 mbar
span mbar
in % span.
In Digital Mode: ±0.125% of calibrated span.
For URV below reference point (100 inH
2
O), effect equals:
±0.125
100 inH
2
O
span inH
2
O
or ±0.125
()
250 mbar
span mbar
in % span.