Xylem DH-21 - Manual (Page 109)

Appendix A
Specifications
DH-21
Specifications A-1
SENSOR SPECIFICATIONS
Accuracy
(Maximum percent of error in measurement)
Pressure: For measurement intervals less than 8 seconds: better than ±0.05% of full scale output
(FSO) over temperature range referenced to a straight line stretched from zero psi to
maximum pressure.
For measurement intervals 8 seconds or greater: ±0.03% of FSO.
Temperature: Internal temperature ±1 C over temperature range.
A/D Resolution
(Smallest change detectable in output signal)
Pressure:
1 part in 250,000 (0.0004%)
Temperature: 1 part in 250,000 (0.0004%)
Output Resolution (Displayed)
Pressure:
0.0001 psi
Temperature: 0.01 C
Linearity
Less than 0.02% deviation from a straight line referenced to end points.
Pressure Hysteresis
Less than 0.03% of FSO.
Long-term Stability
Accuracy drift is less than ± 0.05% of FSO per year.
Range
Pressure
Depth Accuracy 0.05% 0.03%
0 to 5 psi 0 to 11.53 feet ±0.006 feet ±0.003*
0 to 15 psi 0 to 34.60 feet ±0.017 feet ±0.010
0 to 30 psi 0 to 69.20 feet ±0.035 feet ±0.021
*0 to 5 psi is now a custom range
Pressure Overload: Up to 2 times the rated pressure.