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Redundant-Level Flow Monitoring System

Redundant-Level Flow Monitoring System
Product #: FL902AVUS.97
Unit Price Contact Hach

Redundant-Level Monitoring System

Often more than one level measurement is desired due to the application or site conditions. The Hach redundant-level system provides this capability and includes an FL902 flow logger, an AV9000 with a Hach submerged area velocity sensor, and an US9003 in-pipe ultrasonic level sensor. In this configuration, the pressure transducer in the submerged area velocity sensor and the in-pipe ultrasonic sensor measure level and either or both can be used to calculate flow. Redundancy is often desired to insure accurate level measurement in critical situations such as overflow monitoring or billing.

Plug-and-Play Sensors with FL900 Series Flow Loggers

Get started with the FL902 and create a flexible flow meter
network using FL900 series loggers and plug-and-play flow
sensors. Three velocity sensor technologies and two level
sensor technologies are available along with both noncontact
and submerged options. The FL902 used for the
redundant-level system has two sensor ports and can be
deployed for future projects with different sensor
combinations to match the application.

Easy Installation Decreases Site Time and Increases Crew Effciency

For typical redundant-level monitoring applications, the
submerged AV sensor and in-pipe ultrasonic sensor are
installed on a single mounting band with the submerged
AV sensor at the base of the pipe and the ultrasonic sensor
at the crown of the pipe. For confidence in the installation,
both sensors provide real time measurements and the in-pipe
ultrasonic sensor includes a status LED that indicates proper
installation and operation. With the time-saving features
designed into the system, crews spend less time on site,
increasing the effciency of flow monitoring crews.

What's included?

The Hach redundant-level flow monitoring system components include the area velocity sensor, in-pipe ultrasonic sensor and the FL902 Flow Logger.

Specifications

Accuracy: FL900: Timebase Accuracy: +/- 0.002 % , synchronized every 24 hours with server software and modem
Alarm: Maximum of 16 channel alarms including high/high, high, low, low/low and system alarms including low battery, low RTC battery, low slate memory, slate memory full, sensor timeout, sensor ID error
Alternate KTO?: No
Battery Life: Varies with sensor type, logging intervals, telemetry and environment.
Certifications: Logger: CE; optional AC power supply:
UL/CSA/CE
Communication: USB RS232 (Baud rates: 9600, 19200, 38400, 57600, 115200)
Communication (optional): Remote Communications (optional): Wireless modem: 3G & 4G LTE
Datalog Channels: 16 maximum
Data Storage: Datalog: 325,000 sensor measurement data points; 1128 days for 3 channels at 15-minute log intervals
Event Log: 1,000 events maximum in non-volatile flash memory
Sample History: 2,000 sample events maximum in non-volatile flash memory
Data Storage 2: Sample History: 2000 sample events maximum in non-volatile flash memory
Data Storage 3: Datalog: 325 k data points, 1128 days for 3 channels at 15-minute log intervals
Environmental Rating: NEMA 6P (IP68)
Level Accuracy: US9003: 0.2 mm/25.4 mm (0.008 in./in.) from the calibration point at steady state temperature, still air and ideal target
Level Measurement Method: US9003: Down-looking ultrasonic
Sub AV: Differential pressure
Level Range: 0 to 10 ft range
Logging: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 or 60 minutes
Primary and secondary intervals for dynamic logging.
Manual Languages: English
Modem: Non-Wireless
Operating temperature range: -18 to 60ºC (0 to 140ºF) at 95% RH
Power requirements (Voltage): 8 - 18 V DC
Pre-configuration?: AV9000 Module, SUB AV 30ft and US9003 Ultrasonic Sensor
Protocol: Local Modbus RTU
Recommended Range: US9003: 0 to 382.91 cm (0.00 to 150.75 in.)
Sensor Connector: 2, with US9003 AV9000 & SUB AV
Sensor Connectors: 2, additional options
Sensor Ports: 2
Sensors Included: Sub AV & Ultrasonic
Storage conditions: -40 to 60ºC (-40 to 140ºF)
Supported Sensors: FLO-TOTE 3, FLO-DAR, FLO-DAR with Surcharge Velocity Sensor (SVS), Submerged Area Velocity Sensor (requires AV9000 Analyzer Module), Rain Gauge, Sigma 950 Flow Meter (requires IM9001), US9001, US9002
Typical Minimum Operating Depth: Sub AV: 2 cm (0.8cm)
Velocity Accuracy: ±2% of reading or 0.05 fps**
**Uniform velocity profile, known salinity, positive flow. Field performance is site specific.
Velocity-Induced Depth Error: Compensated based on flow velocity
Velocity Measurement Method: Doppler ultrasonic;
twin 1 MHz piezoelectric crystals
Warranty: 12 months
What's included?: The Hach redundant-level flow monitoring system components include the area velocity sensor, in-pipe ultrasonic sensor and the FL902 Flow Logger.