• Directly measure dry air gas pressure
• Pressure accuracy is 0.02% full scale
• Accuracy over temperature range exceeds ±0.01 ft. of water
• Built-in temperature compensation
• Operating temperature range -40°to +60° C
• Easy to use Simple RS-232 Menu Interface
• SDI-12 output provides measurement data in programmable units such as feet, inches, meters, millimeters, centimeters, and user defined
• RS-485 programmable for MODBUS slave or H-3551 control
• Standard mode: outputs: SDI-12, 4-20mA, RS-485, and RS-232
• Other mode outputs: SDI-12, 0-5V, Quadrature, and RS-232
• Easy to use with H-3551 Gas Purge System
• Compatible with RS-232 Data Logger
• Enclosure is nonconductive and corrosion proof
• Low current operation (Less than 1mA standby)
• Set the Stage to current water elevation or level using Extended SDI-12 command or RS-232 menu
• Programmable continuous update outputs Measure Rate mode

 

 

Performance
Accuracy (Maximum percent of error in measure­ment)	Pressure	Less than or equal to 0.02% 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	Less than or equal to 0.02% 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
Linearity	Less than 0.02% deviation from a straight line referenced to end points
Pressure Hysteresis	Less than 0.01% of FSO
Long - term Stability	Accuracy drift is less than ±0.05% of FSO per year
Standard Pressure Ranges: Custom calibration ranges available from 5 - 100 PSI
	Ranges	Depth	Accuracy
	0 to 15 PSI	0 to 34.6 ft. (10.54 m)	±0.007 ft. (2.1 mm)
	0 to 30 PSI	0 to 69.20 ft (21 m)	±0.014 ft. (4.26 mm)
Pressure Overload	Less than 2 times the rated pressure
Interface
SDI-12	Baud Rate	1200
	Protocol	SDI-12 V1.3, 7-bit even parity, 1 stop bit
	Output Voltage Level	Minimum high level: 3.5 volts
		Maximum low level: 0.8 volts
	Response Time	SDI-12:  6-seconds measurements sequence (programmable)
RS-485 Interface	Protocol	Modbus RTU/H-355 Control
	Port	RS-485
	Baud Rate	Programmable (default - 9600)
RS-232 Interface	Protocol	RS-232, 8bit, No Parity, 1 stop bit
	Baud Rate	9600
0-5V Analog Output (optional)	Resolution	1.22 mV (12-bit DAC)
4-20mA Output	Type	4-20mA, optically isolated .75 ft (2.67 m)
	Loop Voltage	8.0V min 35V max
	Resolution	±4 uA (12-bit DAC)
Quadrature Output (Optional)	Output Voltage	Low: 0.4 (max)@ -5mA
		High: 2.5 (min)@ 5mA
Power Requirements	Voltage Input	10 to 16.5 Volts DC
	Supply Current	Sleep Mode 700uA max  Active (measuring) 80mA max
	Surge Protection	Built in, 1.5 KVA
Environmental
	Operating Temperature	-40° C to 60° C
	Compensated Range	-40° C to 60° C
	Storage Temperature	-40° C to 80° C
Media Compatibilty	Non-corrosive dry gases only
Mechanical
	Material	Fiberglass
	Size	4.76” x 4.76” x 2.5” high
	Weight	2 lbs (.91 kg)
	Rating	NEMA 4 enclosure
	Connectors	Sealed Bendix type circular
	Pressure Inlet	1/8” female NPT
	Atmospheric Vent	Sintered bronze, #10-32
Miscellaneous
Connections	7-pin circular	Power, SDI-12 4-20mA, and RS-485
	3-pin circular	RS-232 Communications port
	Cables	Main connector cable with 6-ft pigtail is provided. RS-232 connector cable is optional
Warranty	The WaterLOG® H-3531 FlashLite™ is warranted against defects in materials and workmanship for two years from date of shipment.
Specifications subject to change without prior notice due to ongoing commitment to product testing and improvement. LR January 15, 2011. D19 0311.

Manuals

H-3531 Manual

FAQs

Orifice Line Installation

Catalogs & Brochures

H-3531 Brochure

White Papers

H-3531 Ordering Guide

 

		H-3531-3PCABLE 3-Conductor Interface Cable; RS-232 H-3531-3PCABLE 3-Conductor Interface Cable; RS-232
		H-3531-7PCABLE 7-Conductor Interface Cable; Power, SDI-12, Control H-3531-7PCABLE 7-Conductor Interface Cable; Power, SDI-12, Control
		H-355-INS Installation Kit H-355-INS Installation Kit (includes 2 - 1/8" NPT to 1/8" tube fittings, 1 - 1/8" NPT to 3/8" tube fitting, and 6 ft. 1/8" copper tubing)
		H-355-OL Orifice Line H-355-OL Orifice Line (1000 ft. minimum)