Xylem H-312-22 - Manual (Page 35)

Appendix A
H-312 Specifications
H-312
Specifications A-1
Accuracy
(Maximum percent of error in measurement)
Pressure:
Less than or equal to 0.05% of full scale
output (FSO) over temperature range
referenced to a straight line stretched
from zero PSI to maximum pressure
Temperature: Internal temperature ±1° C over
temperature range
Resolution
(Smallest change detectable in output signal)
Pressure:
1 part in 1,000,000 (0.0001%)
Temperature: 1 part in 1,000,000 (0.0001%)
Linearity
Less than 0.05% deviation from a straight line referenced to
end points
Pressure Hysteresis
Less than 0.02% of FSO
Long-term Stability
Accuracy drift is less than ±0.10% of FSO per year
Standard Ranges
Pressure
Depth Accuracy
0 to 15 PSI 0 to 34.6 ft. ±0.017 ft.
0 to 30 PSI 0 to 69.20 ft ±0.035 ft.
Custom calibration ranges available from 5 to 75 PSI
Pressure Overload
Less than 2 times the rated pressure
Response Time
SDI-12: 3-second measurement sequence (programmable)
SDI-12 Output
Baud Rate:
1200
Protocol: SDI-12, 7-bit even parity, 1 stop bit
Output Voltage Levels:
Minimum high level: 3.5 volts
Maximum low level: 0.8 volts
Power Requirements
Voltage Input:
10 to 16.0 Volts DC
Supply Current:
Sleep Mode 150 A max
Active (measuring) 50mA max
Surge Protection: Built in, 1.5 KVA
Environmental
Operating Temperature:
0° C to 40° C (non freezing)
Compensated Range: 0° C to 40° C
Storage Temperature: -10° C to 75° C
Media Compatibility
Liquids and gases compatible with PVC, ABS, RTV and
stainless steel. Polyurethane cable is not compatible with water
having high concentrations of chlorine.
Mechanical
Material:
Corrosion proof, PVC and ABS plastic
Size 1.05 in. max diameter x 8.5 in. long
Pressure Port Stainless steel screen with 149 micron filter
(field replaceable)
Ballast: Stainless steel, 0.81 LB (0.36 KG)
Sensor Cable (Sensor to junction box):
Type:
4-conductor, 22awg, foil shield, internal
polyethylene vent, kevlar strength members, water-
block tape
Material: Polyurethane jacket
Diameter: 0.310" typ, .0.320" max
Dry Air System
Prevents moisture from condensing in the submersible pressure
transducer, provides compensation for changes in atmospheric
pressure without impairing the sensor’s accuracy. Periodic
maintenance is required.
Enclosure:
Polycarbonate box with transparent lid
Desiccant: Indicating silica gel (field replaceable)
Warranty
The W
ATER LOG ® H-312 is warranted against defects in
materials and workmanship for one year from date of shipment.
Notes
Specifications subject to change without prior notice due to
ongoing commitment to product testing and improvement.
Design Analysis Associates, Inc. does not recommend the use of
submersible pressure transducers in surface water monitoring
applications where silt or mud are problematic.