OTT Flo-Dar User manual

DOC026.98.80380
Flo-Dar™ Sensor
06/2013, Edition 1
User Manual
Bedienungsanleitung
Manuale dell'utente
Manuel d'utilisation
Manual del usuario
Uživatelská příručka
Bruksanvisning
Kullanım Kılavuzu
Navodila za uporabo
Korisnički priručnik

English...................................................................................................................................................................................................3
Deutsch...............................................................................................................................................................................................25
Italiano.................................................................................................................................................................................................49
Français..............................................................................................................................................................................................73
Español...............................................................................................................................................................................................98
Čeština..............................................................................................................................................................................................122
Svenska............................................................................................................................................................................................146
Türkçe................................................................................................................................................................................................169
Slovenski..........................................................................................................................................................................................191
Hrvatski.............................................................................................................................................................................................214
2

Table of contents
Specifications on page 3 Operation on page 20
General information on page 4 Maintenance on page 20
Installation on page 9 Replacement parts and accessories
on page 23
Specifications
Specifications are subject to change without notice.
Specification Details
Dimensions (W x D x H) 160.5 x 432.2 x 297 mm (6.32 x 16.66 x
11.7 in.); with SVS, D=287 mm (15.2 in.)
Weight 4.8 kg (10.5 lb)
Enclosure IP68 waterproof rating, polystyrene
Pollution degree 3
Protection class III
Installation category I
Operating temperature –10 to 50 °C (14 to 122 °F)
Storage temperature –40 to 60 °C (–40 to 140 °F)
Altitude 4000 m (13,123 ft) maximum
Power requirements Supplied by FL900 Series Logger, Flo-Logger
or Flo-Station
Interconnecting cable
(disconnect at both sensor and
logger ends)
Polyurethane, 0.400 (±0.015) inch diameter
IP68
Standard length: 9 m (30 ft); maximum length:
305 m (1000 ft)
Specification Details
Depth measurement Method: Ultrasonic
Standard operating range from Flo-Dar sensor
housing to liquid: 0–152.4 cm (0–60 in.)
Optional extended operating range from
transducer face to liquid: 0–6.1 m (0–20 ft)
(with 43.18 cm (17 in.) deadband), temperature
compensated
Accuracy: ±1%; ±0.25 cm (±0.1 in.)
Surcharge depth measurement Method: Piezo resistive pressure transducer
with stainless steel diaphragm
Auto zero function maintains zero error <
0.5 cm (0.2 in.)
Range: 3.5 m (138 in.); overpressure rating:
2.5 × full scale
Velocity measurement Method: Radar
Range: 0.23–6.10 m/s (0.75–20 ft/s)
Frequency Range: 24.075 to 24.175 GHz,
15 mW (EIRP) maximum
Accuracy: ±0.5%; ±0.03 m/s (±0.1 ft/s)
Certifications The Flo-Dar transmitter is certified to the
requirements that follow:
• Transmitter type: Field disturbance sensor
• Frequency: 24.125 GHz - Doppler pulse
• Maximum rated power output: 128 dbuV
(average) at 3 m (9.8 ft)
Certified to:
FCC Part 15.245: FCC ID: VIC-FLODAR24
Industry Canada Spec. RSS210. v7: IC No.:
6149A-FLODAR24
English 3

Specification Details
Flow measurement
Method Based on the continuity equation
Accuracy ±5% of reading is typical where flow is in a
channel with uniform flow conditions and is not
surcharged, ±1% full scale maximum
Surcharge conditions depth/velocity
Depth (standard with Flo-Dar
sensor)
Surcharge depth supplied by Flo-Dar sensor
Velocity (with optional
surcharge velocity sensor)
Method: Electromagnetic
Range: ±4.8 m/s (±16 ft/s)
Accuracy: ±0.046 m/s (±0.15 ft/s) or 4% of
reading, whichever is more
Zero stability: > ±0.015 m/s (±0.05 ft/s) typical
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
NOTICE
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.
Use of hazard information
DANGER
Indicates a potentially or imminently hazardous situation which, if not avoided, will
result in death or serious injury.
W A R N I N G
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.
NOTICE
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, if noted
on the instrument, will be included with a danger or caution statement in
the manual.
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 that a risk of electrical shock and/or
electrocution exists.
4 English

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 public disposal systems after 12 August of 2005. In
conformity with European local and national regulations (EU Directive
2002/96/EC), European electrical equipment users must now return
old or end-of-life equipment to the Producer for disposal at no charge
to the user.
Note: For return for recycling, please contact the equipment producer or supplier
for instructions on how to return end-of-life equipment, producer-supplied
electrical accessories, and all auxiliary items for proper disposal.
This symbol, when noted on the product, identifies the location of a
fuse or current limiting device.
This symbol indicates that the marked item requires a protective earth
connection. If the instrument is not supplied with a ground plug on a
cord, make the protective earth connection to the protective
conductor terminal.
Confined space precautions
DANGER
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.
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.
FCC regulations
Use of this device is subject to the conditions that follow:
• There are no user serviceable items inside this device.
• The user must install this device in accordance with the supplied
installation instructions and must not modify the device in any manner
whatsoever.
• Any service that includes the transmitter must only be done by Hach
Company.
• The user must make sure that no one is within 20 cm (8 in.) of the
face of the radar transmitter when it is in operation.
Certification
Canadian Radio Interference-Causing Equipment Regulation,
IECS-003, Class A:
Supporting test records reside with the manufacturer.
This Class A digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulations.
Cet appareil numérique de classe A répond à toutes les exigences de la
réglementation canadienne sur les équipements provoquant des
interférences.
English 5

FCC Part 15, Class "A" Limits
Supporting test records reside with the manufacturer. The device
complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:
1. The equipment may not cause harmful interference.
2. The equipment must accept any interference received, including
interference that may cause undesired operation.
Changes or modifications to this equipment not expressly approved by
the party responsible for compliance could void the user's authority to
operate the equipment. This equipment has been tested and found to
comply with the limits for a Class A digital device, pursuant to Part 15 of
the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated
in a commercial environment. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference
to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference, in which case the user will be
required to correct the interference at their expense. The following
techniques can be used to reduce interference problems:
1. Disconnect the equipment from its power source to verify that it is or
is not the source of the interference.
2. If the equipment is connected to the same outlet as the device
experiencing interference, connect the equipment to a different
outlet.
3. Move the equipment away from the device receiving the interference.
4. Reposition the receiving antenna for the device receiving the
interference.
5. Try combinations of the above.
Product overview
The Flo-Dar sensor measures the flow velocity and liquid depth in open
channels using radar and ultrasonic technology. The unit is made to
withstand submersion during surcharge conditions. The optional
surcharge velocity sensor supplies velocity measurements during
surcharge conditions.
Figure 1 shows the configuration of a Flo-Dar system in a non-
hazardous location.
Figure 1 System overview
1 Flo-Dar sensor with optional
surcharge velocity sensor
3 Mounting frame
2 Logger or controller 4 Non-hazardous environment
Theory of operation
The Flo-Dar sensor is installed above an open channel of water and
measures the surface velocity and depth from above the surface of the
water. The two measurements are used to calculate the flow rate.
6 English

During surcharge (submerged) conditions, a pressure transducer
measures depth. The optional surcharge velocity sensor (SVS) can be
used to measure velocity during surcharge conditions.
Surface velocity measurement
The surface velocity of the water is measured with radar technology. A
radar beam is transmitted from the sensor to the water surface at the
center of the channel. Some of the signal is reflected back at a slightly
different frequency. The difference in frequency, known as the Doppler
frequency, is directly proportional to the speed of the flow. Proprietary
algorithms are then used to calculate the average speed of the flow
stream.
Note: The radar velocity sensor does not operate under surcharge conditions.
Velocity measurements during surcharge
The optional surcharge velocity sensor (SVS) is activated when the flow
level increases to within 17.78 cm (7 in.) of the sensor mounting frame
and stays active until the flow decreases to 17.78 cm (7 in.) below the
sensor mounting frame. The mounting frame is installed 12.7–15.24 cm
(5–6 in.) above the crown of the pipe. This location puts the velocity-
sensing electrodes at the correct location in the flow below the elevation
of the crown of the pipe.
The SVS measures velocity with an electromagnetic sensor that makes
a magnetic field. When the water passes through the magnetic field, a
voltage results that is directly proportional to the speed of the water
passing the sensor.
Depth measurement
The water depth is measured with an ultrasonic pulse echo sensor. An
electronic pulse is sent to the water surface and some of the signal is
reflected back to the sensor. The transit time to the surface and back is
used to calculate the distance from the water surface to the sensor. The
pipe diameter is used to convert the distance to a water depth.
The depth sensor on the Flo-Dar unit can measure distances up to 1.5 m
(5 ft). For larger channels, an extended range sensor is available to
measure up to 6.1 m (20 ft).
During surcharge conditions, a pressure transducer in the Flo-Dar unit is
used to measure the water depth.
Flow calculations
The velocity and depth measurements are used with the pipe diameter
to identify the flow rate. The flow rate is calculated from the continuity
equation (1):
(1) Flow rate = Average velocity × Area
where
Flow rate = volume of liquid passing the sensor per unit of time (e.g.,
200 gallons per minute)
Average velocity = average velocity of the liquid, calculated with surface
velocity measurements and algorithms
Area = cross-sectional area of the liquid in the channel, calculated with
the channel dimensions and depth measurement
Product components
Make sure that all components have been received. Refer to Figure 2
and Figure 3. If any items are missing or damaged, contact the
manufacturer or a sales representative immediately.
English 7

Figure 2 Instrument components
1 Surcharge velocity sensor (SVS)
(optional)
4 Bubble level
2 Flo-Dar sensor 5 Cable connectors
3 Extended depth sensor (optional)
Figure 3 Wall mount hardware
1 Wall mount bracket 7 Standard frame
2 Spacer, 12-inch 8 Spacer, 2¼-inch
3 Anchor nut, 3/8 x 2¼ in. (2x) 9 Adjustable wall bracket
4 Anchor washer (2x) 10 Clamp bolts, ¼-20 x 1 in. (8x)
5 Anchor nut, 3/8-16 (2x) 11 Clamp half, not threaded (2x)
6 Frame for extended depth sensor
(optional)
12 Clamp half, threaded (2x)
8 English

Installation
DANGER
Explosion hazard. Trained personnel only must install or commission
the equipment.
Mechanical installation
Site location guidelines
For the best accuracy, install the sensor where the flow is not turbulent.
The ideal location is in a long, straight channel or pipe. Outfalls, vertical
drops, baffles, curves or junctions cause the velocity profile to become
distorted.
Where there are outfalls, vertical drops, baffles, curves or junctions,
install the sensor upstream or downstream as shown in
Figure 4–Figure 6. For upstream locations, install the sensor at a
distance that is at least five times the pipe diameter or the maximum fluid
level. For downstream locations, install the sensor at a distance that is at
least ten times the pipe diameter or the maximum fluid level.
If the location contains a junction and the flow in one pipe is much
higher, install the sensor on the wall near the lower flow pipe.
Figure 4 Sensor location near an outfall, vertical drop or baffle
1 Acceptable upstream sensor
location
5 Distance downstream: 10 × pipe
diameter
2 Outfall 6 Vertical drop
3 Distance upstream: 5 × maximum
level
7 Baffle
4 Acceptable downstream sensor
location
English 9

Figure 5 Sensor location near a curve or elbow
1 Acceptable upstream sensor
location
3 Distance downstream: 10 × pipe
diameter
2 Acceptable downstream sensor
location
4 Distance upstream: 5 × pipe
diameter
Figure 6 Sensor location near a junction
1 Acceptable upstream sensor
location
3 Distance downstream: 10 × pipe
diameter
2 Acceptable downstream sensor
location
4 Distance upstream: 5 × pipe
diameter
10 English

Install the sensor
W A R N I N G
Explosion hazard. In hazardous locations, friction between surfaces
can generate sparks that can cause an explosion. Make sure that no
friction is possible between the instrument and any surrounding
surfaces.
CAUTION
Potential hearing loss risk. Hearing protection required. The level
transducer emits ultrasonic sound energy when powered. Ear
protection must be worn when working within 1 meter of this device.
Do not point the transducer output towards ears during installation,
calibration and maintenance.
Ultrasonic pressure:
•Dimensions of useful beam: Long range
• Ultrasonic pressure: > 110 dB at 1 m (3.3 ft) on axis
• Sound pressure inside beam: 111.9 dB maximum
Mount the Flo-Dar sensor above the open channel on the wall of the
manhole. For hazardous locations, a barrier must be installed outside of
the hazardous area.
For temporary installation, an optional Jack-bar is available. Refer to
Replacement parts and accessories on page 23. Instructions are
supplied with the Jack-bar.
The sensor dimensions are shown in Figure 7 and Figure 8.
The dimensions of the standard frame for wall installation are shown in
Figure 9.
Figure 7 Sensor dimensions
1 Optional extended depth sensor 3 Minimum clearance for cable
2 Minimum clearance for cable with
extended depth sensor
English 11

Figure 8 Sensor with SVS dimensions
1 Minimum clearance for cable
Figure 9 Standard frame dimensions
1 579.12 mm (22.8 in.) with 2¼ in. spacer; 828.04 mm (32.6 in.) with 12 in.
spacer
Assemble the clamps on the frame and wall bracket
Install the clamps on the frame and wall mount bracket before
installation on the wall.
Items to collect: Wall mount hardware (Figure 3 on page 8)
• Frame
• Wall mount bracket
• Clamps
• Hardware: wall bracket, spacer, nuts and bolts
12 English

1. Put two clamp halves (one with threads and one without threads)
around the wall mount bracket. Refer to Figure 10.
2. Connect the clamp halves together with four bolts. Tighten the bolts
sufficiently to temporarily hold the clamp in position.
3. Put the other two clamp halves around the front end of the frame.
Refer to Figure 10.
Note: Typically, the front of the frame will point toward the wall. Refer to
Figure 10 and Figure 14 on page 16. If flow conditions make it necessary to
point the sensor away from the wall, use the 12-inch spacer and put the two
clamp halves around the back end of the frame.
4. Connect the clamp halves together with four bolts. Tighten the bolts
sufficiently to temporarily hold the clamp in position.
Figure 10 Assemble the clamps on the wall bracket and frame
1 Adjustable wall bracket 5 Frame
2 Clamp half, threaded 6 Spacer
3 Clamp bolt, ¼–20 x 1 in. 7 Wall mount bracket
4 Clamp half, not threaded
Install the frame on the wall
DANGER
Explosion hazard. Review the safety information in Confined space
precautions on page 5 before entering a confined space.
English 13

Review the guidelines that follow to find the best location for the sensor.
•Examine the upstream and downstream flow characteristics. Use a
mirror if necessary. Install the sensor above the water where the flow
is stable. Do not install the sensor where there are standing waves,
pools or objects or materials that can disrupt the flow profile.
• If the upstream flow characteristics are acceptable, install the sensor
on the upstream wall of the manhole with the sensor pointing
upstream. This location will make sure that the measured flow is the
same as the flow in the pipe and that the sensor cable points away
from the wall.
• Install the sensor away from the sides of the pipe and in the very
center of the flow where the fluid is at the maximum depth.
• Install the sensor in a location that is accessible for maintenance.
Items to collect:
• Assembled frame and wall mount bracket assembly
• Anchors with nuts and washers
• Tools: mirror, ruler or tape measure, marker
Complete the steps to install the frame on the wall of the manhole above
the flow. Make sure to obey all codes and/or directives that are relevant
to the location. Refer to Site location guidelines on page 9.
1. Make a mark on the wall that identifies the location of the top of the
sensor frame. Refer to Figure 11. The wall brackets will be installed
above and below this mark.
• Sensor without SVS—make sure that when the sensor is in the
frame, the radar beam is not stopped by the wall or channel. Refer
to Figure 13 on page 16.
• Sensor with SVS—the top of the sensor frame must be installed at
an exact distance above the top of the channel. For pipe
diameters that are more than 635 mm (25 in.), measure 127 mm
(5 in.) from the interior crown of the pipe to the top of the frame.
For pipe diameters that are less than 635 mm (25 in.), measure
152.4 mm (6 in.) from the interior crown of the pipe to the top of
the frame.
2. Put the wall mount brackets above and below this mark.
3. Attach the brackets to the wall using the supplied anchors. Install the
anchors into 3/8-in. diameter holes at a depth of 38.1 mm (1.5 in.).
4. Connect the frame to the wall bracket with a spacer. Refer to
Figure 11. It may be necessary to use the 12-inch spacer to position
the sensor farther from the wall when there is a large pipe lip.
Figure 11 Wall installation
1 Distance from interior crown of pipe
to top of frame
3 Washer
2 Anchor 4 Nut
14 English

Install the sensor on the frame
The sensor fits in the frame in only one direction and is held in position
when the bail on the sensor is turned. Refer to Figure 12. The sensor
can be removed from the frame and installed without entry into the
manhole when the optional retrieval pole is used.
1. Make sure that the cable is tightly connected to the sensor.
2. Turn the bail to retract the locking bars on the sensor.
3. Put the sensor on the frame. Make sure that the cable points toward
the center of the manhole.
4. Turn the bail to hold the sensor on the frame. Refer to Figure 12.
Figure 12 Horizontal alignment
1 Bubble level 2 Bail
Align the sensor vertically – Flo-Dar without SVS
The sensor must be aligned vertically to make sure that the sensor is
above the flow and that the radar beam will not be stopped by the wall or
pipe. Refer to Figure 13.
1. Make an estimate of where a line that extends from the top of the
radar lens perpendicular to where the lens will point. Refer to
Figure 13.
2. Loosen the clamp on the wall mount bracket and put the frame so
that the radar beam will point below the crown of the pipe by at least
25.4 mm (1 in.). Refer to Figure 13. It may be necessary to install the
12-inch spacer to extend the frame farther from the wall.
3. Tighten the clamp and measure the frame position. Make sure that
the radar beam is not stopped by the wall or pipe. If the beam is
stopped, move the frame further away from the wall with the 12-inch
spacer or lower the frame.
English 15

Figure 13 Vertical alignment of the sensor
1 Spacer 2 Distance from interior crown of pipe
to top of frame
Align the sensor vertically – Flo-Dar with SVS
The sensor must be aligned vertically to make sure that the sensor is
above the flow under normal full flow conditions and that the SVS is
activated under surcharge conditions.
Item to collect: Ruler or tape measure
1. Measure directly above the crown of the pipe to the top of the frame.
Refer to Figure 11 on page 14.
2. If the pipe lip is longer than 140 mm (5.5 in.), install the 12-inch
spacer between the wall mount bracket and the frame. Refer to
Figure 14.
3. Loosen the clamp on the wall mount bracket and put the top of the
frame above the crown of the pipe at the specified distance:
•152.4 mm (6 in.) for a pipe diameter that is less than 610 mm
(24 in.)
• 127 mm (5 in.) for a pipe diameter that is equal to or larger than
610 mm (24 in.)
4. Tighten the clamp and measure the frame position again to make
sure that it is at the correct position.
Figure 14 Vertical alignment of the sensor with SVS
1 Spacer 3 SVS sensor (optional)
2 Distance from interior crown of pipe
to top of frame
16 English

Align the sensor horizontally
The sensor must be aligned horizontally to make sure that the sensor is
over the center of the flow. If the pipe is not level and has a slope of
2 degrees or more, align the sensor to be parallel with the surface of the
water.
Item to collect: Bubble level
1. Remove the paper backing from the bubble level and attach the level
to the sensor. Refer to Figure 12 on page 15.
2. Loosen the clamps and tap the frame into position.
3. Tighten both clamps and measure the frame position to make sure
that it is at the correct position.
Make a final alignment check
The correct vertical and horizontal alignment of the sensor is necessary
for accurate measurements.
1. Measure the vertical alignment and make adjustments if necessary.
Refer to Align the sensor vertically – Flo-Dar without SVS on page 15
or Align the sensor vertically – Flo-Dar with SVS on page 16.
2. Measure the horizontal alignment and make adjustments if
necessary. Refer to Align the sensor horizontally on page 17.
3. Repeat steps 1 and 2 until no further adjustments are necessary.
Optional extended depth sensor installation
The extended depth sensor (Figure 15) can be used when the pipe or
channel depth is more than the standard level specifications. Refer to
Specifications on page 3.
Use the extended frame (Figure 16) instead of the standard frame, or
mount the extended depth sensor on the wall.
The extended depth sensor must be installed at least 457.2 mm (18 in.)
above the crown of the pipe for correct measurements. The extended
depth sensor has a deadband zone of 431.8 mm (17 in.) where the
sensor is not active.
Figure 15 Extended sensor dimensions
Figure 16 Extended frame dimensions
1 739.14 mm (29.1 in.) with 2¼ in. spacer; 985.52 mm (38.8 in.) with 12 in.
spacer
English 17

Figure 17 Vertical alignment with extended depth sensor
1 Spacer
Measure the sensor offset
The sensor offset is the distance from the top of the frame to the bottom
of the pipe or channel. This distance will be entered into the software
and is necessary for accurate flow calculations.
If the optional extended depth sensor is installed on the wall without the
extended frame, the sensor offset is the distance from the surface of the
extended depth sensor to the bottom of the pipe or channel.
Items to collect:
•Rod
• Tape measure
1. Put the rod in the bottom of the pipe or channel and align it vertically
with the frame. Refer to Figure 18.
2. Make a mark on the rod to identify the location of the top of the
sensor frame.
3. Measure the distance from the bottom of the rod to the mark. This is
the sensor offset.
Note: If it is not practical to measure to the bottom of the pipe, measure the
distance from the crown of the pipe to the top of the frame. Refer to Figure 18.
Add this distance to the pipe diameter to get the sensor offset. Sensor offset =
pipe diameter + distance from crown of the pipe to the top of the frame
Figure 18 Sensor offset
1 Distance from interior crown of pipe
to top of frame
3 Sensor offset
2 Pipe diameter
18 English

Measure the pipe diameter
The correct diameter of the pipe or channel is necessary for accurate
flow calculations.
1. Measure the inside pipe diameter (ID) at three locations. Refer to
Figure 19. Make sure that the measurements are accurate.
2. Calculate the average of the three measurements. Record this
number for use during the software setup for the site.
Figure 19 Pipe diameter measurement
Electrical installation
Wiring safety information
DANGER
Electrocution hazard. Always remove power to the instrument before
making electrical connections.
Electrostatic discharge (ESD) considerations
NOTICE
Potential Instrument Damage. Delicate internal electronic components
can be damaged by static electricity, resulting in degraded
performance or eventual failure.
Refer to the steps in this procedure to prevent ESD damage to the
instrument:
•Touch an earth-grounded metal surface such as the chassis of an
instrument, a metal conduit or pipe to discharge static electricity from
the body.
• Avoid excessive movement. Transport static-sensitive components in
anti-static containers or packages.
• Wear a wrist strap connected by a wire to earth ground.
• Work in a static-safe area with anti-static floor pads and work bench
pads.
Connect the logger or controller
Connect the cable from the Flo-Dar sensor to the logger or the controller:
• Logger–connect the cable from the Flo-Dar sensor to the sensor
connector on the logger. If the Flo-Dar sensor has the SVS
component, connect the cable from the SVS component to the sensor
connector on the logger.
• Controller–connect the cable from the Flo-Dar sensor to the correct
terminal in the controller. If the Flo-Dar sensor has the SVS
component, connect the cable from the SVS component to the correct
terminal in the controller. Refer to the controller documentation for the
correct terminal locations.
English 19

Operation
A portable computer with Flo-Ware software must be connected to the
logger or station to set up and collect data from the Flo-Dar sensor.
Install the Flo-Ware software on the PC
1. Put the Flo-Ware CD into the CD drive on the PC.
2. Save the floware4.exe file to the hard drive on the PC.
3. Open the file to start the installation wizard and complete the on-
screen instructions to install the software.
4. Open and run the flodar.exe file. An installation wizard will start.
Complete the on-screen instructions to install the software.
Set up the FL900 Series Logger Flo-Logger or Flo-
Station
W A R N I N G
Explosion hazard. The connection must be made to a 12 VDC battery-
powered logger or controller.
Refer to the Flo-Ware Software user manual for details on how to set up
the Flo-Dar sensor. The Flo-Ware Software user manual can be
downloaded from http://hachflow.com, or through the Help and Support
Center link on the Main screen of the Flo-Ware software.
Maintenance
DANGER
Multiple hazards. Only qualified personnel must conduct the tasks
described in this section of the document.
DANGER
Explosion hazard. When using the retrieval pole, make sure to
connect the grounding strap to the ground lug on the barrier. The
sensor must also be connected to the barrier during maintenance
activities. This is to prevent ignition of explosive gases due to static
discharge.
CAUTION
Radar RF exposure hazard. Avoid putting the head and other vital
organ areas within the microwave beam (within 1 meter (3.3 ft) of the
microwave aperture). Although the Flo-Dar microwave power level is
very small (approximately 15 mW) and is well below government
stated exposure limits for uncontrolled environments, users of this
product should obey proper safety protocols for the handling of
devices with radar frequency transmitters.
NOTICE
Handle the sensor with care to prevent damage to the microwave transmitter.
Damaged transmitters can result in higher signal power levels, which can
interfere with essential terrestrial microwave links.
The safety of the transmitter may be impaired if any of the following
conditions have occurred:
•Visible damage
• Storage above 70 °C for prolonged periods
• Exposure to severe transport stresses
• Previous installation
• Failure to operate properly
If any of these conditions have occurred, return the device to the
manufacturer for recertification.
Look for corrosion and damage
Look for corrosion and damage once a year.
Note: The only parts of the Flo-Dar system that can be replaced by the user are
the bail assembly and the cable. If the sensor becomes defective, it must be
replaced as a complete unit.
20 English