Hach AV9000S Bedienungsanleitung

DOC026.98.80186

Submerged Area/Velocity

Sensor and AV9000

08/2017, Edition 8

User Manual

Manuel d'utilisation

Manual del usuario

Manuale d'uso

Bedienungsanleitung

Manual do Usuário

Instrukcja obsługi

Kullanım Kılavuzu

English..............................................................................................................................3

Français......................................................................................................................... 22

Español.......................................................................................................................... 42

Italiano............................................................................................................................ 63

Deutsch.......................................................................................................................... 83

Português.................................................................................................................... 103

Polski............................................................................................................................ 123

Türkçe...........................................................................................................................143

Table of contents

Specifications on page 3 Operation on page 14

General information on page 4 Maintenance on page 15

Installation on page 7 Replacement parts and accessories on page 19

Specifications

Specifications are subject to change without notice.

Specifications—Submerged area velocity sensor

Performance will vary depending on channel size, channel shape and site conditions.

Velocity measurement

Method Doppler ultrasonic

Transducer type: Twin 1 MHz piezoelectric crystals

Typical minimum depth for

velocity

2 cm (0.8 in.)

Range -1.52 to 6.10 m/s (-5 to 20 ft/s)

Accuracy ± 2% of reading (in water with uniform velocity profile)

Level measurement

Method Pressure transducer with stainless steel diaphragm

Accuracy (static) • ±0.16% full scale ±1.5% of reading at constant temp (±2.5 ºC)

• ±0.20% full scale ±1.75% of reading from 0 to 30 ºC (32 to 86 ºF)

• ±0.25% full scale ±2.1% of reading from 0 to 70 ºC (32 to 158 ºF)

Velocity-induced depth error Compensated based on flow velocity

Level range • Standard: 0–3 m (0–10 ft)

• Extended: 0–9 m (0–30 ft)

Allowable level • Standard: 10.5 m (34.5 ft)

• Extended: 31.5 m (103.5 ft)

General attributes

Air intake Atmospheric pressure reference is desiccant protected

Operating temperature 0 to 70 ºC (32 to 158 ºF)

Level compensated temperature

range

0 to 70 ºC (32 to 158 ºF)

Material Noryl® outer shell with epoxy potting within

Power consumption Less than or equal to 1.2 W @ 12 VDC

Cable Urethane sensor cable with air vent

Connector Hard anodized, satisfies Military Spec 5015

Cable lengths available • Standard: 9, 15, 23 and 30.5 m (30, 50, 75, 100 ft)

• Custom: 30.75 m (101 ft) to 76 m (250 ft) maximum

English 3

Cable diameter 0.91 cm (0.36 in.)

Dimensions 2.3 cm H x 3.8 cm W x 13.5 cm L (0.9 in. H x 1.5 in. W x 5.31 in. L)

Compatible instruments Sigma 910, 920, 930, 930 T, 950, 900 Max samplers and the

AV9000 interface modules for the FL series flow loggers and AS950 samplers

Specifications—AV9000 interface module

Velocity measurement

Measurement method 1 MHz Doppler Ultrasound

Doppler Analysis Type Digital Spectral Analysis

-1.52 to 6.10 m/s (-5 to 20 ft/s)

± 2% of reading or 0.05 fps (uniform velocity profile, known salinity,

positive flow. Field performance is site specific.)

Doppler Accuracy ±1% of reading or 0.025 fps(with electronically simulated Doppler signal,

-25 to +25 fps equivalent velocity). Refer to Configure the sensor

on page 14.

Power requirements

Supply voltage 9-15 VDC

Maximum current <130 mA @ 12 VDC with submerged area velocity sensor

Energy per measurement <15 Joules (typical)

Operating temperature

-18 to 60 ºC (0 to 140 ºF) at 95% RH

Enclosure

Dimensions (W x H x D) AV9000: 13 x 17.5 x 5 cm (5.0 x 6.875 x 2.0 in.)

AV9000S: 12.01 x 14.27 x 6.86 cm (4.73 x 5.62 x 2.70 in.)

Environmental Rating NEMA 6P, IP68

Enclosure material PC/ABS

General information

In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential

damages resulting from any defect or omission in this manual. The manufacturer reserves the right to

make changes in this manual and the products it describes at any time, without notice or obligation.

Revised editions are found on the manufacturer’s website.

Safety information

N O T I C E

The manufacturer is not responsible for any damages due to misapplication or misuse of this product including,

without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent

permitted under applicable law. The user is solely responsible to identify critical application risks and install

appropriate mechanisms to protect processes during a possible equipment malfunction.

Please read this entire manual before unpacking, setting up or operating this equipment. Pay

attention to all danger and caution statements. Failure to do so could result in serious injury to the

operator or damage to the equipment.

Make sure that the protection provided by this equipment is not impaired. Do not use or install this

equipment in any manner other than that specified in this manual.

4 English

Use of hazard information

D A N G E R

Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious

injury.

CAUTION

Indicates a potentially hazardous situation that may result in minor or moderate injury.

N O T I C E

Indicates a situation which, if not avoided, may cause damage to the instrument. Information that requires special

emphasis.

Precautionary labels

Read all labels and tags attached to the instrument. Personal injury or damage to the instrument

could occur if not observed. A symbol on the instrument is referenced in the manual with a

precautionary statement.

This is the safety alert symbol. Obey all safety messages that follow this symbol to avoid potential

injury. If on the instrument, refer to the instruction manual for operation or safety information.

This symbol indicates the presence of devices sensitive to Electro-static Discharge (ESD) and

indicates that care must be taken to prevent damage with the equipment.

Electrical equipment marked with this symbol may not be disposed of in European domestic or public

disposal systems. Return old or end-of-life equipment to the manufacturer for disposal at no charge to

the user.

Confined space precautions

D A N G E R

Explosion hazard. Training in pre-entry testing, ventilation, entry procedures, evacuation/rescue

procedures and safety work practices is necessary before entering confined spaces.

The information that follows is supplied to help users understand the dangers and risks that are

associated with entry into confined spaces.

On April 15, 1993, OSHA's final ruling on CFR 1910.146, Permit Required Confined Spaces, became

law. This standard directly affects more than 250,000 industrial sites in the United States and was

created to protect the health and safety of workers in confined spaces.

Definition of a confined space:

A confined space is any location or enclosure that has (or has the immediate potential for) one or

more of the following conditions:

• An atmosphere with an oxygen concentration that is less than 19.5% or more than 23.5% and/or a

hydrogen sulfide (H2S) concentration that is more than 10 ppm.

• An atmosphere that can be flammable or explosive due to gases, vapors, mists, dusts or fibers.

• Toxic materials which upon contact or inhalation can cause injury, impairment of health or death.

English 5

Confined spaces are not designed for human occupancy. Confined spaces have a restricted entry

and contain known or potential hazards. Examples of confined spaces include manholes, stacks,

pipes, vats, switch vaults and other similar locations.

Standard safety procedures must always be obeyed before entry into confined spaces and/or

locations where hazardous gases, vapors, mists, dusts or fibers can be present. Before entry into a

confined space, find and read all procedures that are related to confined space entry.

Product overview

The submerged area velocity (AV) sensor is used with Sigma flow meters, FL series flow loggers and

AS950 samplers to measure the flow rate in open channels. Refer to Figure 1.

The sensor is available in oil-filled and non-oil-filled versions. The non-oil sensor is used for

reasonably clear sites, or sites where the pipe may become dry. The oil-filled sensor is used for sites

with high levels of biological growth, grit or silt.

Note: Do not use an oil-filled sensor in a pipe that may become dry.

The submerged AV sensor connects to a FL series flow logger or AS950 sampler through an

AV9000 interface module. Refer to Replacement parts and accessories on page 19 to identify the

applicable AV9000 model for the flow logger or sampler.

Note: The submerged AV sensor connects directly to Sigma flow meters. An AV9000 interface module is not

necessary.

Figure 1 Submerged area velocity sensor

1 Junction box (optional) 6 Lanyard

2 Desiccant hub 7 Submerged AV sensor

3 Desiccant container 8 Carabiner clip

4 Air reference tube 9 Sensor cable

5 Connector

Theory of operation

The sensor operates as an area velocity sensor and follows the continuity equation.

Flow rate = wetted area x average velocity

6 English

A pressure transducer in the sensor converts the pressure of the water to a level measurement. The

level measurement and the user-entered channel geometry are used to calculate the wetted area of

the flow stream.

The sensor also contains two ultrasonic transducers: one is a transmitter and the other is a receiver.

A 1 MHz signal is transmitted and reflected off of particles in the flow stream. The reflected signal is

received and its frequency is offset by the Doppler shift proportional to the velocity of the particles in

the flow stream. The flow logger converts the doppler shift in the returned ultrasound signals to a

velocity measurement.

Product components

Figure 2 shows the items in the shipment package. Contact the manufacturer if any components are

damaged or missing.

Figure 2 Product components

1 Submerged AV sensor 3 Junction box

2 Submerged AV sensor with junction box 4 Mounting screws (6x)

Installation

Installation guidelines

D A N G E R

Explosion Hazard. The non-IS AV sensors (770xx-xxx P/Ns) are not rated for use in classified Hazardous

Locations. For classified Hazardous Locations, use IS AV sensors (880xx-xxx PNs) installed per the control

drawings in 911/940 IS Blind Flow Meter manuals.

D A N G E R

Potential confined space hazards. Only qualified personnel should conduct the tasks described in this section of

the manual.

• Do not install more than one sensor in pipes with a diameter of less than 61 cm (24 inches).

Multiple sensors in smaller pipes can create turbulent or accelerated flows near the sensors, which

may cause inaccurate measurements.

• Mount the sensor as close as possible to the bottom of the pipe invert. This will give the most

accurate low-velocity-level measurements.

• Do not monitor flows in the manhole invert. The best location for the sensor is 3 to 5 times the

sewer diameter/height upstream of the invert.

• Put monitoring sites as far from inflow junctions as possible to avoid interference caused by

combined flows.

English 7

• Objects such as rocks, pipe joints, or valve stems create turbulence and generate high-speed

flows near the object. Make sure the area 2 to 4 pipe diameters in front of the sensor installation is

clear of obstructions. Best accuracy is obtained when there are no flow disruptions within 5 to

10 pipe diameters.

• Do not use sites with low-velocity flows that create silt buildup in the invert or channel. Buildup of

silt near the sensor can inhibit the Doppler signal and cause inaccurate sensor readings and depth

measurements.

• Do not use sites with deep rapid flows where sensor installation would be difficult or dangerous.

• Do not use sites with high-velocity, low-depth flows. Splash-over and excessive turbulence around

the sensor can cause inaccurate data.

Interference

The AV9000 interface module includes a sensitive radio-frequency receiver capable of the detecting

very small signals. When connected to a flow logger or sampler communications or auxiliary power

ports, some line-powered equipment can add electrical noise that interferes with Doppler velocity

measurements. Interference with measurements is uncommon in typical sites.

The AV9000 is most sensitive to noise falling within its Doppler analysis span of 1 MHz ± 13.3 kHz.

Noise at other frequencies typically does not cause interference.

Some laptop computers can cause interference problems when operated from external AC power

adapters. If such a device has an effect on the measurements, operate the laptop computer with

batteries or disconnect the cable between the laptop computer and the flow logger or sampler.

Install the AV9000 interface module

The submerged AV sensor connects to a FL series flow logger or AS950 sampler through an

AV9000 interface module. Refer to Replacement parts and accessories on page 19 to identify the

applicable AV9000 interface module for the flow logger or sampler.

Note: The submerged AV sensor connects directly to Sigma flow meters. An AV9000 interface module is not

necessary.

1. Install the AV9000 interface module. Refer to the AV9000 documentation for instructions.

2. Connect the sensor cable to the AV9000 interface module. Refer to the AV9000 documentation

for instructions.

3. Connect the AV9000 cable to a sensor port (or terminal) on the flow logger or sampler. Refer to

the flow logger or sampler documentation for instructions.

Attach the desiccant hub

Attach the desiccant hub to the flow logger or sampler to give strain relief to the sensor cable and the

connector. Refer to Figure 3 to Figure 5.

For the best performance, make sure to install the desiccant container vertically with the end cap

pointed down. Refer to Figure 3 to Figure 5.

8 English

Figure 3 Attach the desiccant hub—FL900 flow logger

1 End cap

Figure 4 Attach the desiccant hub—FL1500 flow logger

1 AV9000S with bare-wire connection 3 End cap

2 Accessories mounting plate

English 9

Figure 5 Attach the desiccant hub—AS950 portable sampler

1 End cap

Zero level calibration

If one or more of the statements that follow are correct, do a zero level calibration before the sensor

is installed.

• The installation location is a dry channel.

• It is not possible to get an accurate level in the flow because the level changes too rapidly.

• It is not possible to get an accurate level in the flow because of physical hazards.

Note: The sensor is factory-calibrated for the specified range and temperature.

Zero level calibration (FL series flow logger or sampler)

To do a zero level calibration with an FL900 flow logger, do a zero level calibration (zero calibration

in air) with the FSDATA Desktop Setup Wizard. Refer to the FSDATA Desktop documentation for

instructions. As an alternative, do a manual zero level calibration (zero calibration in air) with

FSDATA Desktop.

To do a zero level calibration with the FL1500 flow logger or sampler, refer to the FL1500 flow logger

or sampler documentation for instructions. As an alternative, do a zero level calibration with the

FSDATA Desktop Setup Wizard when the sensor is connected to an FL1500 flow logger.

Make sure that the sensor is out of the water and on a flat, level, horizontal surface.

Note: If the sensor is replaced, removed for maintenance or moved to another instrument, do a zero level

calibration.

10 English

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