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DOC026.53.80211
OTT MF pro
07/2012, Edition
3
Operating Instructions
Table of Contents
Specifications
General information
..................................................................................................4
Installation
User interface and navigation
............................................................................11
Startup and self-test
...............................................................................................17
Operation
Measure velocities in a cross-section .......................................................... 19
Velocity/Level Integration measurement method ...............................................23
Maintenance
1
Table of Contents
Troubleshooting
Replacement parts and accessories
...............................................................29
Appendix
2
Specifications
Specifications are subject to change without notice.
Sensor specifications
Specification
Velocity measurement
Details
Method
Range
Electromagnetic
0 to 6.09 m/s (0 to 20 ft/s)
Minimum water depth
Accuracy
3.18 cm (1.25 in.)
±2% of reading ±0.015 m/s (±0.05 ft/s) 0 to 3.04 m/s (0 to 10 ft/s); ± 4% of reading from
3.04 to 4.87 m/s (10 to 16 ft/s)
Resolution
Zero stability
Material
Enclosure rating
0.01 value < 100; 0.1 value < 1000; 1.0 value ≥ 1000
±0.015 m/s (±0.05 ft/s)
ABS, glass filled
IP68
Dimensions (L x W x H) 11.9 x 4.3 x 6.3 cm (4.7 x 1.7 x 2.5 in.)
Cable material Polyurethane jacketed
Cable lengths
Depth measurement
1.5, 6.1, 12.2 and 30.5 m (5, 20, 40 and 100 ft)
Method
Accuracy (static)
Range
Resolution
Diaphragm type: absolute pressure with single point calibration
The larger of ± 2% of reading or ± 0.015 m (± 0.504 inches). Steady state temperature and static non-flowing water.
3.05 m (0-10 ft)
0.01 value < 100; 0.1 value < 1000; 1.0 value ≥ 1000
Portable meter specifications
Specification
Pollution degree
Details
2
Protection class II
Charging temperature 0 to 40 ºC (32 to 104 ºF)
Operating temperature –20 to 55 ºC (-4 to 131 ºF)
Storage temperature
Enclosure rating
–20 to 60 ºC (-4 to 140 ºF )
IP67
Battery life gauge
Battery type
Five-segment bar graph
Rechargeable lithium ion, 3.7 V, 4.2 Ah
18 hours heavy typical day use
1
; 20 ºC (68 ºF) Battery life
Battery charger External Class III power adapter 100–240 VAC, 50–60 Hz, 0.3 A input; 12 VDC, 1.0 A output
Dimensions (L x W x H) 21.8 x 9.3 x 5.3 cm (8.6 x 3.7 x 2.1 in.)
English 3
Specification
USB connector
Material
Details
Type Mini-B, 5-pin, rated to IP67 when capped
Polycarbonate with a thermoplastic elastomer (TPE) overmold
1
Defined as 30 minutes of set up, six 1-hour periods of continuous use with an active sensor and the display at maximum brightness and 30 minutes of sleep mode between use periods, data download and power off.
User interface specifications
Specification Details
Graphics display Color, LCD 3.5" QVGA transflective (readable in direct sunlight)
Measurement resolution 0.01 value < 100; 0.1 value < 1000; 1.0 value ≥ 1000
Keypad
Operating modes
Profile types
Conduit shapes
Alpha-numeric
Real time, profiling
Stream, conduit
Circular, rectangular, trapezoidal, 2/3 egg, inverted 2/3 egg
Stream entries
Noise rejection
Units of measure
Fixed, non-fixed stations
User-selectable, 50 Hz or 60 Hz
Velocity: ft/s, m/s, cm/s, mm/s
Flow: ft
3 liters/min
/sec, million gal/day, gal/day, gal/min, m
3
/s, m
3
/min, m
3
/hour, m
3
/day, liters/s,
Stream flow calculation
Depth: in., ft, m, cm, mm
Mean-section or mid-section method
Diagnostics Self test, keypad, display, event log
Conduit profiling methods 0.9 x Vmax, 0.2/0.4/0.8, velocity and level integrator, 2D
Stream profiling methods 1, 2, 3, 5 and 6 point (velocity method - USGS and ISO)
File types Real-time, profiling, event log
Languages English, French, Spanish, German, Italian, Dutch, Danish, Swedish, Chinese, Polish,
Japanese, Korean, Portuguese, Slovak, Russian, Hungarian, Bulgarian, Romanian,
Czech, Turkish, Finnish, Greek
General specifications
Specification
Profiles
Maximum number of real-time files
Firmware
Details
Data storage for up to 10 profiles with 32 stations per profile
Three each with up to 75 readings captured by the user.
The sensor and portable meter are field upgradeable via USB
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.
4 English
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.
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.
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.
C A U T I O N
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
This symbol, if noted on the instrument, references the instruction manual for operation and/or safety information.
This symbol indicates the presence of devices sensitive to Electro-static Discharge (ESD) and indicated 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 endof-life equipment, producer-supplied electrical accessories, and all auxiliary items for proper disposal.
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 numèrique de la classe A respecte toutes les exigences du Rëglement sur le matériel brouilleur du Canada.
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:
English 5
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 portable velocity system is used in the field, laboratory and municipalities. Turbulent, noisy and low flows can be measured with this system.
When the sensor is placed in flowing water, a magnetic field around the sensor creates a voltage proportional to the flow velocity. This voltage amplitude, which represents the rate of water flow around the sensor, is detected by electrodes in the sensor and processed by the sensor microprocessor. The processed signal is digitally transmitted through the sensor cable to the portable meter and the information is shown on the meter display. The system includes a portable meter, sensor with cable and accessories.
The meter and sensor get velocity information in conduits and streams. These measurements are important for calibration in municipal wastewater industries, as well as for developing and maintaining stage discharge relationship curves.
Two types of sensor are available: velocity-only and velocity plus depth. This manual covers both types of sensors. If information applies to a specified type of sensor, this fact is noted in the text.
System overview
An overview of the assembled system is shown in Figure 1
. Refer to the documentation supplied with the individual components or accessories for more information.
6 English
Figure 1 Assembled components
1 Portable meter
2 Sensor height lock/release device
3 Top setting wading rod (optional accessory)
4 Sensor cable
5 Adjustable mount for portable meter
6 Sensor assembly
7 Sensor height lock/release screw (optional accessory)
8 20 mm/HERES wading rod adapter (optional accessory)
9 20 mm wading rod (optional accessory)
10 HERES wading rod (optional accessory)
11 Sensor height lock/release screw
Sensor overview
shows the main sensor components. Instructions for how to attach the sensor on a standard or top-setting or HERES or 20 mm wading rod are supplied with the accessory.
English 7
Figure 2 Sensor components
1 Sensor electrodes
2 Sensor body
3 Sensor connection plug
4 Sensor attachment thumb screw
Meter overview
Figure 3 shows the features of the meter.
Figure 3 Meter components
5 Pressure cell (sensors with depth option)
6 Sensor with depth option
7 Sensor without depth option
1 USB connection port
2 Keypad
3 Meter display
4 Expansion port (not used)
5 Battery compartment cover
6 Threaded hole for adjustable meter mount
7 Slots for velcro or strap attachment
8 Slot for neck strap attachment threads (2x)
9 Sensor connection port
10 Wall-charger connection port
Product components
When purchasing a complete system, refer to
Figure 4 to make sure that all components have been
received. If any of these items are missing or damaged, contact the manufacturer or a sales representative immediately.
8 English
Figure 4 System components
1 Carrying case (with slot for sensor cable)
2 USB communication cable
3 Adjustable portable meter mount
4 Wall charger and universal plug kit
5 Sensor
6 Extra thumb screws (4x)
7 Cloth to dry the sensor
8 Universal sensor mount
9 Velcro strap
10 Lanyard
11 Portable meter
12 Sensor as connected to meter inside case
Installation
Installation with optional accessories
Mount the meter on an optional wading rod for use in low-stage stream environments where the stream can be waded. Optional accessories let the user take measurements from a bridge or cable over a stream. A torpedo shaped weight attached below the sensor keeps the sensor in place when under water. For more information, refer to the documentation supplied with the accessory.
Install the sensor on the universal sensor mount
Use the universal sensor mount to attach the sensor to poles 1 inch or less in diameter. For correct operation and accurate readings, the front of the sensor must be pointed upstream with the electrodes in full contact with the flow.
Note: Keep the sensor electrodes free from nonconductive substances such as oil and grease. To remove sensor
1. The front part of the sensor is round and contains three electrodes. The sensor has a mounting hole in back and a thumbscrew on top. Put the mounting shaft of the universal mount in the mounting hole at the back of the sensor. Make sure that the mounting shaft is completely engaged with the mounting hole and the thumbscrew is engaged with the groove.
2. Hand tighten the thumbscrew.
3. Move a pole 1 inch or less in diameter through the clamp of the universal sensor mount. Tighten the clamp.
Note: Instructions for how to mount the sensor on a standard, top-setting, HERES or 20 mm wading rod are supplied with the accessory.
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Connect the sensor to the meter
Attach the lanyard
Attach the lanyard to wear the meter safely around the neck.
10 English
Attach the velcro strap
Use the velcro strap to hold the extra cable. Refer to
Figure 5 Attach the velcro strap
1 Loop side 2 Hook side
User interface and navigation
Keypad and key functions
Figure 6 shows the meter keypad. Table 1
gives the functions of each key or key type.
English 11
Figure 6 Keypad
1 Power On/Off
2 OK
3 Up and Down arrows
4 Quick Jump
5 Right and Left arrows
6 Main Menu
7 Underscore or decimal
8 Backspace
9 Alpha-numeric
10 Previous menu
Table 1 Key description
Key
Power On/Off
Description
Energizes and de-energizes the meter.
OK Confirms an entry or highlighted menu option.
Up and Down arrows Moves up or down in the display. If the cursor is at the top or bottom of the display, the cursor wraps to the bottom or top when the UP or DOWN arrow is pushed.
Quick Jump In normal operation, this key jumps to the Select conduit shape screen.
If the auto-zero feature is disabled, hold this key for five seconds to do a manual zero of the depth sensor.
In Real-Time mode, the Quick Jump key toggles between the digital and graph views.
Right and Left arrows Moves to the right or left in the display.
Main Menu Moves to the Main Menu from any submenu or screen.
Underscore or decimal Puts in an underscore or decimal character. In numeric-only fields, this key automatically puts a decimal point in the cursor position.
Backspace
Alpha-numeric
Previous menu
Moves the cursor back one space.
Puts in the key alpha or numeric value. Values are put in the order shown on the key.
After 2 seconds, the value shown in the display is stored and the cursor advances.
Moves to the previous screen.
Status bar
A status bar is shown in the top of the display. Descriptions of the information in the status bar are
12 English
Indicator
Time and Date
USB
Conductivity
Battery
File access
Auto zero depth indicator
Table 2 Status bar indicators
Description
Shows the current time and date.
Shows when a USB cable is connected. If a USB cable is connected and this indicator does not show in the status bar, the USB cable is not fully engaged. Make sure that the
USB cable is pushed in completely and makes full contact with the connection port.
If the sensor is out of the water and non-conductive, a blue ring appears next to the battery icon. If the sensor is in the water and conductive, the indicator is a solid blue circle.
A five-bar graph shows the level of charge in the battery.
Shows while the meter gets access to a file.
If the depth sensor was zeroed in the last 30 minutes, a solid green circle shows next to the Conductivity indicator. If the depth sensor was not zeroed in the last 30 minutes, this indicator flashes red.
Navigation and Main Menu
Push OK to confirm a selected menu option or a value shown in the display. Select More and push
OK to see additional screens and options if available. Push the Main Menu button to go to the Main
Menu from a submenu.
Note: Some operations cannot be completed unless a sensor is connected to the meter. If these operations are tried when there is no sensor connected, the display shows an error message. Connect a sensor and try the operation again.
1. Real time—Select this option to get real-time velocity and depth information. (A sensor with depth capability is necessary to read depth). An example of a Real Time screen for sensors with
velocity only is shown in Figure 7
. Real time screens for sensors with both velocity and depth is shown in
Figure 8 . The format of the information and options shown depends on the type of
sensor used. In Real Time mode, the Quick Jump key toggles between digital and graphic views of Real Time information. The velocity is updated in FPA filter mode according to fixed period averaging time. In RC filter mode, the velocity is updated continuously on the screen every
250 ms.
Option
Capture
Description
Stores the depth and velocity information shown in memory. The information is saved until power is cycled, the memory is saved to a non-volatile real-time file, or the user exits from realtime mode.
Save
Saves captured measurements in the volatile memory to a non-volatile real-time file. A message will show if the number of files is greater than the maximum possible. Files are stored in tab delimited (.tsv) format.
Done or OK Exits the real-time mode and returns to the Main Menu. If there is unsaved data in volatile memory, a confirmation message asks the user to confirm the exit without saving the data.
Clear
Clears captured measurements from the volatile memory buffer. The user can choose from
Clear Last, Clear All or Cancel options.
English 13
Option
Setup
Files or
View
Description
Allows the user to modify the main filter parameters and enable and program the Maximum
Depth sensor positioning feature. The Maximum depth feature allows a user to enter system parameters for depth measurement in Real Time mode. The user can choose to enter a maximum depth value taken directly with a ruler measurement (manual), or taken indirectly with the depth measurement (automatic). Both methods enable the Maximum Depth sensor positioning feature.
In automatic mode setup, the user directly enters the distance from the bottom of the channel to the bottom of the sensor mount (offset). The setup interface will continuously show the current depth value returned by the sensor plus the offset. The meter stores this value as the
Maximum Depth when the OK button is pushed. In all other cases, the depth values shown do not include the offset.
The Maximum depth feature requires a sensor with velocity plus depth.
Shows a summary of each real-time file stored in non-volatile memory. Files can be individually viewed and deleted.
Figure 7 Real time screen
14 English
Figure 8 Real time screen for sensor with depth
2. Profiler— Select this option to do stream or conduit velocity measurements. The meter shows prompts when user input is necessary. The meter saves up to 10 profiles with up to 32 stations per profile. This number can be greater if data acquisition time is less than the maximum. A
percentage of the remaining memory is given in 1% resolution. Refer to the Appendix
on page 30 for more information about profiles.
Option Description
Stream
This option is used to set up a profile for a stream or flowing channel. Do velocity measurements to calculate total discharge based on ISO 748 or USGS standards for Mid-section or Mean-section methods.
Conduit This option is used to set up a profile for a conduit.
Files
This option is used to view or delete stored files. Files can be deleted all at once or individually.
Setup
This option is used to set up or change the settings for filter parameters and the Maximum Depth feature.
3. Set up—Select this option to change general system settings and preferences.
Option
Velocity calibration
Description
Calibrates the sensor. Adds a field offset to the factory calibration. Refer to the
on page 30 for more information.
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Option
Filter parameters
Wet/dry threshold
Auto zero depth
EMI
Clock
USB
Language
Units
Beeper
Flow calculation
Description
Applies a data acquisition filter (Main filter or Pre-filter). The user can select the filter parameters.
Main filter
• Fixed Period Averaging (FPA)—Fixed Period Averaging averages data over a user selectable fixed period of time (1 to 480 seconds). The default is 30 seconds. If the FPA value is 5, the velocity value shown in the display is updated once every 5 seconds.
• RCA time constant—The RC filter helps smooth out turbulence through the use of a selected time constant in the filter algorithm. This mode is useful when searching for a maximum velocity, for example in the common 0.9 x Vmax profile method. High RC filter time constants give higher degrees of smoothing. The time constant can be set from 2 to
20 seconds, with a default value of 6. At 1 time constant, the filter settles to approximately 60% of the final value. At 5 time constants, the filter settles to 99.9% of the final value. Thus, if the RC value is set to 2, the final value shows after 10 seconds.
Pre-filter
• Median filter—The filtering process is done in the sensor. The feature can be disabled.
However, the recommended (default) value is 5. Enable the feature to enter or change this value.
Sets the sensor submersion threshold for wet and dry conditions. The default value is 20%.
on page 33 for more information.
Sets the Auto Zero feature to On or Off.
If set to On, the instrument does an air calibration when the sensor is removed from the water and is in the air. To do the air calibration, the instrument automatically zeroes the sensor.
If set to Off, the user can manually zero the sensor. To do this, remove the sensor from the flow, then push and hold the Quick Jump key for five seconds.
When the sensor has been in the flow for 30 minutes, the green circle in the upper right corner goes from green to red. This is a prompt to the user to remove and zero the sensor again.
Sets the local line frequency for ambient noise rejection to 50 Hz (default) or 60 Hz .
Sets the date and time of the portable meter in 24-hour format. Daylight savings time is not supported.
Sets the USB mode.
• Mass Storage (default)—This mode operates like a memory stick or hard drive. Files are read-only.
• CDC—This mode is used to update firmware.
Selects the language used in the menus.
Sets the units for velocity, flow and depth measurements. Options are Metric (default) or
English .
On (default) or Off. If set to On, the meter makes an audible tone when the sensor is at the correct depth for applicable profile methods. The meter also makes an audible tone when an inactive button is pushed in any menu. This feature is available only with the optional depth sensor.
Selects the method of flow calculation for open water segment (stream profiles only).
Options are Mean-section or Mid-section. Refer to the
on page 30 for more information.
16 English
Option
Station entry
Description
• Fixed—The operator puts in the width of the stream and the number of stations for measurements. The meter divides the cross-section into evenly spaced distances between the station verticals.
• Non-fixed (default)—The operator selects the spacing between station verticals. This is the more commonly used option as it lets the operator include obstructions and other restrictions in the cross section.
Restore defaults
Sets all meter options to the factory default values.
4. Diagnostics— Select this option to troubleshoot problems with the meter or an attached sensor.
For more information about the Diagnostics options, refer to Diagnostics
on page 28.
Startup and self-test
D A N G E R
Chemical or biological hazards. If this instrument is used to monitor a treatment process and/or chemical feed system for which there are regulatory limits and monitoring requirements related to public health, public safety, food or beverage manufacture or processing, it is the responsibility of the user of this instrument to know and abide by any applicable regulation and to have sufficient and appropriate mechanisms in place for compliance with applicable regulations in the event of malfunction of the instrument.
W A R N I N G
Fire and explosion hazards. Do not use or store the instrument in direct sunlight, near a heat source or in high temperature environments such as a closed vehicle in direct sunlight. Failure to take this precaution can make the battery overheat and cause a fire or explosion.
The battery must be installed in the meter and charged before use. For more information about
battery installation and replacement, refer to Install or replace the battery on page 27. For
information on how to charge the battery, refer to
on page 28.
Note: The meter is not operational while the battery charges.
1. Push the meter power button until an audible beep is heard.
The meter does a self test and the display shows the results. If the meter fails the self-test, the display shows FAIL next to the failed parameter. If the sensor fails, attach a different sensor if available.
2. When the self test is complete, push OK to go to the Main Menu.
3. To de-energize the meter, push the power button again. In the Confirmation screen, select Yes and push OK.
If the portable meter becomes unresponsive, push and hold the power button for more than
3 seconds to force the power off. Do not force off the power in normal operation or when the file access icon is visible.
Sleep mode
The meter backlight goes dim after 30 seconds of no activity and goes into sleep mode after
60 seconds of no activity. These actions do not occur if the meter is in real-time mode or while the meter is measuring. After 30 minutes in sleep mode, the meter power goes off.
To cancel the sleep mode, push any key. The display brightness goes back to the normal level and all keys go back to their normal functions.
English 17
Operation
Stream profiles
Stations and station spacing
For a well-chosen cross-section, division into 25 to 30 partial sections is typically sufficient. If the cross-section is very smooth and the velocity distribution very consistent, it is possible to decrease the number of stations.
Make the distance between the partial stations so that no individual station contains more than 10% of the discharge. The ideal measurement is one in which each partial station contains 5% or less (≤
5%) of the total discharge, but this is rarely possible when 25 stations are used. Partial stations should not have equal widths across the entire cross-section unless the discharge is well-distributed.
Distances between stations are generally smaller where water depth and flow velocities change significantly. Places where depth and velocities frequently change significantly include bank areas, vertical or steep slopes, ledges in divided cross-sections and transitions from the main stream bed to the foreland. Stations should also be located at points of significant changes in the stream bed profile.
The measurement cross-section must be set at right angles to the direction of flow. Cross-sections must not contain still areas, counter currents or eddies. Do not put the sensor in deep pools, below large inflows, or near ship moorings, ferries or sluices.
as a guide for the number of stations necessary for an acceptable measurement. The information is based on EN - ISO 748 standards.
Table 3 Number of stations in relation to the waterway width
Feet
< 1.6
> 1.6 and < 3.3
> 3.3 and < 9.8
> 9.8 and < 16.4
> 16.4
Meters
< 0.5
> 0.5 and < 1
> 1 and < 3
> 3 and < 5
≥ 5
Number of stations
5 to 6
6 to 7
7 to 12
13 to 16
≥ 22
Measure velocity
Measurement quality is dependent on the correct selection of a measurement cross-section. Select a section of stream with the following characteristics:
• The flow directions at each measurement point across the stream are parallel to the bank and perpendicular to the cross-section.
• The streambed is stable and free of large rocks, weeds and protruding obstructions such as piers that cause turbulence.
It is often not possible to completely satisfy all of these conditions. Use the criteria to select the best possible section and then select a cross-section.
The general procedure to take velocity measurements in river and stream profiles is described below.
Make the first measurement in a stream profile at the top. Make each subsequent measurement below the last one.
• In fixed mode, divide the channel into stations of equal width.
• Conduct a velocity measurement at each station. The portable meter shows and stores the depth and measured velocity information.
• When the stream profile is completed, the meter automatically calculates the total flow.
For accurate measurement results, stand to the side of the instrument. Refer to
18 English
Figure 9 Position of user in the flow
Measure velocities in a cross-section
A typical stream cross-section is shown in Figure 10
.
Figure 10 Example of a typical cross section
To measure velocities in a cross-section:
1. In the Main Menu, select Profiler.
2. Enter the Operator name. A list of options will show.
Option
Stream
Conduit
Description
Used for measurements in a stream profile.
Used for measurements in a conduit profile.
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Option
Files
Setup
Description
Used to view or delete files.
Used to set up filter parameters and the Maximum depth feature.
3. Select Setup > Maximum depth. Select Manual or Automatic.
Option
Manual
Description
In this mode, the instrument prompts the user to manually enter the maximum depth of each vertical. This value is normally obtained from a wading rod.
Automatic In this mode (available only on sensors with the depth option), the instrument uses the pressure transducer to measure the maximum depth at each vertical.
a. If Automatic is selected, enter the distance from the bottom of the channel to the bottom of the sensor mount.
b. Put the sensor at the lowest position on the wading rod.
c. Enter the minimum depth (measured from the bottom) that the sensor can read. Refer to
. When rods with a base plate and/or tip are used, this extra distance can be larger.
This depends on whether the subsurface is firm or yields. The extra distance is important as a parameter for the correct determination of the water depth.
Figure 11 Minimum depth
4. Select Top or Bottom for the measurement reference then push OK.
5. If necessary, change or update the filter parameters in Profiler Setup.
6. In the Profiler menu, select Stream.
7. Enter a name for the stream profile. Make profile names alpha-numeric with a maximum of
11 characters. Push OK to save the profile name or select Clear to delete all current stream profile data.
8. Enter the stage reference. This is typically an elevation value from an immovable object such as a survey marker or bridge, etc.
20 English
9. In the Station menu, select Edge/Obstruction. Select one of the options.
Option
Left
Description
Select this option if the station is at the left edge of the water or an obstruction (i.e, sandbar, pylon or large boulder).
Right
Use this option if the station is at the right edge of water or an obstruction (i.e., sandbar, pylon or large boulder).
Open water Use this option to configure the edge as an open water environment (default).
10. Select Distance to Vertical and enter the information.
11. Select Set Depth and enter the information. If at an edge, the meter automatically sets this value to 0.00.
a. If Manual mode was selected in the Profiler setup, enter the total depth of water at this vertical position.
b. If Automatic mode was selected in the Profiler setup, push OK to set the maximum flow depth at the value shown.
12. If Left or Right was selected in Step 9, enter an edge factor for the vertical. Select a factor from the list or User-defined. For User-defined values, enter a roughness factor between 0.50 (very rough) and 1.00 (smooth). The roughness factor is relevant only for right angled cross sections. It is used as a factor in the calculation of the discharge proportion of edge areas. For example:
• Smooth edge with no vegetation (e.g., concrete, steel, cement)— 0.8 to 0.9
• Brick sides with vegetation— 0.7
• Rough walls with heavy vegetation—0.6 to 0.5
13. Select Measure Velocity. Select the number of points on the vertical to collect.
14. Select a measurement point from the list. Obey the instrument prompts and adjust the sensor to the correct depth. If the sensor has a depth option, adjust the sensor depth until the depth box is green. This means the sensor is in at the correct position.
Note: Red indicates more adjustment is necessary. Yellow indicates the depth is close to the correct depth.
15. Select Capture to start the measurement process.
16. If necessary, the setup can be changed and the measurement can be repeated. When the measurement is complete, push OK to store the data.
17. Repeat steps 13–16 for the other measurement points on the vertical.
18. When all measurements for the station are complete, select Main or Verify. results. Push OK to return to the list of measurement points.
Option Description
Main
Returns to the station menu.
Verify
Shows the average velocity reading for the station based on the measurement method.
19. Select Next to go to the next station.
20. Repeat steps 10–19 for the remaining stations.
21. When all measurements for all stations in the profile are complete, select Channel Summary to view the results.
Note: A warning flag will show if the discharge in one or more segments is > 5% of the total discharge.
Insert or delete a station
Prev, Next, Ins and Del options show at the bottom of the display in the Station screen. Prev and
Next are used to navigate to a previous or subsequent station. Ins and Del are used to insert or delete a station.
English 21
For example, after measurements have been done at 10 stations, a user may wish to insert a new station between stations 3 and 4. The steps below describe how to do this. These steps can be applied in similar situations.
1. Select Prev and push OK until the display shows the information for Station 3.
2. Select Ins and push OK.
The instrument adds a new station named Station 4. Subsequent stations are automatically given new sequential numbers.
3. To delete the current station (when in non-fixed mode), select Del and push OK.
Conduit profiles
It is possible to use all of the methods for conduit profiles in this section in sites with a typical profile shape and sufficient depth to measure 3-point velocities. The 0.9 x Vmax method can also be used when the depth is not sufficient for multi-point profiles.
Note: In typical conduit profiles, the first measurement is made at the bottom. Subsequent measurements are made above the one made before. A different procedure may be necessary for some profiles.
1. In the Main Menu, select Profiler.
2. Enter the operator name.
3. In the list of options, select Conduit.
4. Enter a name for the new Conduit profile.
5. Select the conduit shape.
Note: The input screens that show next depend on the shape selected.
6. Enter values at the screen prompts.
When the necessary values have been entered, the display shows the Select Method menu.
7. Select a profile method and do the steps for the method.
Option
0.9 x Vmax
Description
The meter calculates flow based on 90% of the fastest velocity. This is the recommended method when the depth is less than 12.7 cm (5 in.) or when the velocity is not stable.
0.2/0.4/0.8
Vel./Lev. Integ. The meter integrates 10 separate velocity and level measurements to calculate the flow level.
2D
The meter calculates the flow value based on velocity measurements taken at 0.2, 0.4 and
0.8 x the depth. One and two-point versions of this method are also possible.
The sensor collects information while constantly moved through the flow in a specified pattern. The meter calculates the flow value when the user selects Save. This method is recommended for flows where a difference of 30% or more exists between the right and left side velocities.
0.9 x Vmax measurement method
The meter uses the maximum velocity measurement in the conduit and multiplies this value by 0.9 to calculate the total flow.
Note: The RC filter mode with a value of 2 to 4 seconds is recommended for this method.
1. In the Select Method menu, select 0.9 x Vmax.
2. With the sensor in the flow, select Measure Velocity to get a velocity measurement.
The measured values are shown on the graph.
3. Move the sensor until a point of maximum velocity is found, then push OK.
The meter calculates and shows the flow, maximum and average velocity values.
4. Select Save.
The information is saved to a data file.
22 English
0.2/0.4/0.8 method
Do measurements at one, two or three points to calculate an average velocity. Each point represents
a percentage of the maximum depth as measured on the center line as shown in Figure 12 .
Figure 12 2-4-8 profile
1. In the Select Method menu, select 0.2/0.4/0.8.
2. Select one of the options.
Option
One point
Two point
Three point
Description
One-point measurement at 0.4 x maximum depth
Two-point measurement at 0.2 and 0.8 x maximum depth
Three-point measurement at 0.2, 0.4 and 0.8 x maximum depth
3. For the selected option, select a measurement point. The meter shows the sensor adjustment information.
4. If necessary, adjust the sensor as necessary.
5. Select Capture.
The meter gets information from the sensor and shows the velocity value in numerical and graphical form.
6. If necessary, select Setup to change the Y-axis range or the data filter parameters.
7. Push OK.
8. Do steps 3–7 for all of the other measurement points then push OK to return to the list of measurement points.
9. Select Flow.
10. Select Save to save the information to a data file.
Velocity/Level Integration measurement method
Measurements are done at 10 different depths. The results from all segments are integrated to calculate the flow value.
• Select Prev or Next to go to another measurement.
• Select Main to return to the Select Method menu.
1. In the Select method menu, select Vel./Lev. Integ.
The display shows the first measurement screen.
2. Select Measure Velocity.
The sensor depth information is shown.
English 23
3. If necessary, adjust the sensor depth as shown.
4. Select Capture.
The handheld unit gets information from the sensor and shows the average velocity value in numeric and graphical form.
5. If necessary, select Setup to change the Y-axis range in FPA filtering mode, the X and Y-axis range when in RC filtering mode or the data filter parameters.
6. Push OK to confirm the information.
7. Select Next. The next measurement screen in the series appears.
8. Do steps 2–7 for the other measurement depths.
9. Select one of the options at the bottom of the screen.
Option
Save
Units
Description
Calculates the current flow value and saves this information to a data file.
Changes the unit type (English or Metric).
2D measurement method
Velocity is measured while the sensor is moved through the flow as shown in
.
Select Cancel at any time to cancel the measurement and return to the Select Method menu.
Note: The RC filter mode with a value of 2 to 4 seconds is recommended for this method.
1. In the Select method menu, select 2D.
The sensor depth information is shown.
2. If necessary, adjust the sensor depth.
3. Select Capture. While the sensor collects data, move the sensor through the entire cross-section in the pattern shown in
.
4. If necessary, select Setup to change the Y-axis range in FPA filtering mode, the X and Y-axis range when in RC filtering mode or the data filter parameters.
5. Push OK.
6. Select one of the options shown at the bottom of the screen.
Option
Save
Units
Description
Calculates the current flow value and saves this information to a data file.
Changes the unit type (English or Metric).
Figure 13 Path of the sensor in the flow
1 Start
24 English
2 Finish
Download data
The meter directory is Read Only. In Windows, the meter operates as a mass storage device or removable hard drive.
1. Set the meter to USB Mass Storage mode.
2. To edit the data in a file, drag and drop the file to a laptop or PC. File names are limited to eight characters.
3. Data files are kept in the tab separated variable (.TSV) format. To see files in Microsoft
® double or right-click a file and open the file with Excel.
Excel,
Real time files are stored in a directory called RT. Stream and conduit profile files are stored in a directory called P.
Delete data files
1. To delete all files from USB memory:
a. Go to Main Menu > Diagnostics > Delete Files.
b. In the confirmation window, select Yes.
c. Push OK once to delete the files, then one more time to return to the previous screen.
2. To delete Real Time files:
a. Go to Main Menu > Real-Time > Files.
b. Select Delete All or use the UP or DOWN arrow to select a file in the list.
c. Push OK once to delete the files, then one more time to return to the previous screen.
3. To delete Profiler files:
a. Go to Main Menu > Profiler > Files.
b. Select Delete All or use the UP or DOWN arrow to select a file in the list.
c. Push OK once to delete the files, then one more time to return to the previous screen.
Maintenance
Download the PVM utility
The PVM utility is used to update the firmware in the portable meter. The PVM Utility is available at http://www.ott.com
or http://www.hachhydromet.com
. Do the steps listed for the selected URL.
1. Go to http://www.ott.com
.
2. Login to MyOtt.
3. Click Software Updates.
4. Select MF pro.
5. Click More.
6. Click PVMSetup.msi.
7. Choose Save or Run.
1. Go to http://www.hachhydromet.com
.
2. Click the Service and Support tab.
3. Click More (below Software Downloads).
4. Select MF pro.
5. Click the download link.
6. Select Save or Run.
Update the firmware
on page 25.
English 25
The PVM Utility is necessary for this procedure. To download the PVM Utility, refer to
on page 25.
This is the general procedure to update firmware for the meter and sensor. To update the sensor firmware, the sensor must be connected to the meter.
1. Double-click the PVM Utility desktop icon.
2. Push the power button on the meter. When the meter self-test is complete, push OK.
3. In the Main Menu, select Setup, then push OK.
4. Select USB>CDC, then push OK.
5. Connect the USB cable to the portable meter and the PC.
6. In the PVM Utility window, select Connect.
7. In the drop-down menu, select the PVM (COM X) port, where COM X is the virtual port number assigned to the PVM by Windows. Push OK.
8. In the left-side panel, select Firmware Update, then select the Meter or Sensor tab.
9. Select the correct firmware version, then click Start.
The firmware download starts. A "Firmware update successful" message shows when the download is complete. For meter updates, the instrument display turns off until the instrument completes the update. Then, the instrument automatically resets and powers up again after a few minutes. Do not try to make the instrument power on or off before the update process is complete.
10. In the Main Menu, select Diagnostics > About. Make sure that the firmware versions for both the
Handheld Boot and the Handheld Application are correct.
Clean the sensor
W A R N I N G
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective equipment appropriate to the chemicals that are handled. Refer to the current material safety data sheets (MSDS) for safety protocols.
Clean the sensor when unexpected increases or decreases in flow or level trends occur and after use in sandy or muddy waterways.
For heavy contamination, soak the sensor in clear water for a few minutes to help make the contamination easy to remove.
Disconnect the sensor from the meter before it is cleaned. Use only solutions listed as acceptable in
sure the holes for the pressure cell chambers are washed out and clear of contamination. Rinse the sensor with clean water before re-attaching the sensor to the assembly.
Table 4 Acceptable and unacceptable cleaning solutions
Acceptable
Dish detergent and water
Window cleaner
Isopropyl alcohol
Do not use
Concentrated bleach
Kerosene
Gasoline
Aromatic hydrocarbons
26 English
Clean the meter
1. Push the power button to de-energize the meter.
2. Use a clean, moist cloth to clean the meter exterior. Mix the water with a mild detergent if necessary.
3. Dry the meter exterior with a clean cloth. Let the meter dry in air completely before it is energized again.
Note: Do not use paper-based cloths to clean the display. This type of cloth can cause damage to the display screen.
Install or replace the battery
W A R N I N G
Personal injury hazard. This instrument contains one or more batteries. To prevent battery degradation, leakage or explosion, do not use or keep the instrument in places where the temperature is higher than the specified temperature limits of the instrument.
W A R N I N G
Fire and explosion hazards. Battery substitution is not permitted. Use only batteries that are supplied by the instrument manufacturer.
W A R N I N G
Multiple hazards. Do not disassemble the instrument for maintenance. If the internal components must be cleaned or repaired, contact the manufacturer.
N O T I C E
Discard used batteries promptly. Keep used batteries away from children. Do not disassemble the battery or discard the battery in fire.
The instrument is shipped without the battery installed. Order new batteries from the instrument
manufacturer. Refer to Replacement parts and accessories
on page 29. Recycle or discard used batteries in accordance with local regulations.
Note: If the instrument must be returned to the factory for repair or maintenance, remove the battery and put the battery in a protective cover before shipment.
1. If necessary, remove the used battery as shown in
.
2. Install a new battery in the same location and with the same orientation.
3. Install the battery cover. Make sure that the cover is secure to keep the enclosure rating.
4. Charge the battery if necessary. Refer to Charge the battery on page 28.
English 27
Figure 14 Remove the battery
Charge the battery
Make sure that the correct plug-type for the geographic location is installed on the wall charger.
Note: Battery charger substitution is not permitted. Use only the charger specified in the list of parts and accessories for the instrument. Refer to
Replacement parts and accessories
A lithium ion battery in the meter supplies power to both the meter and the sensor. Install and charge the battery before the instrument is used.
A full battery charge will supply power to the system for approximately 10–11 hours with constant use. When the level of battery charge drops to 3.4 V or less, the display shows a warning and the meter automatically powers off. The battery must be charged before the unit becomes functional again.
1. Connect the round end of the charger cable to the power jack of the portable meter. Refer to
2. Connect the wall charger plug to a power outlet.
A blue light shows around the charge port while the battery charges. When the charge process is complete, the blue light goes off. A discharged battery gets a full charge in about 8 hours.
Note: The meter is not operational while the battery charges. The battery does not charge through the USB cable connection.
Troubleshooting
Diagnostics
In the Main Menu, select Diagnostics to see information about the meter and do the diagnostic tests
.
Table 5 Meter diagnostics
Option Description
About Shows information about the meter and the sensor. Includes the serial number and the firmware version.
Delete files Deletes all files from memory to make space for new measurements. Make sure that the data is downloaded to a PC before this option is selected. The system automatically reformats the memory after file deletion.
Sensor
Self test
Shows diagnostic information about the sensor.
Makes the meter do a diagnostic self test.
Key pad test Does a test of any button to make sure that the button is functional.
28 English
Table 5 Meter diagnostics (continued)
Option Description
Display test Does a test on the display to make sure that the display is functional.
Event log Lets the user see, delete or export the event log. Export the event log to make the contents available as an accessible file through USB mass storage. This option is used primarily by factory service.
Troubleshoot errors
The meter and sensor contain no user-serviceable parts. For the errors and messages listed, try the corrective action.
If the problem does not go away or a problem occurs that is not in the list, contact the manufacturer.
Message or problem
Sensor is not connected
Value is out of range
Solution
Connect a sensor and try the action again.
Change the measurement parameters or put in a different value, then try the action again.
Clean the sensor and test.
Sensor data is known to be not correct or not accurate
Sensor is not recognized
Display is dim or is not visible
Data is not available or access to the data is not possible
Meter is unresponsive
Check the sensor connection. Make sure that the lock nut on the connection port is tight (finger-tighten only).
Push a key on the keypad.
Make sure that the USB option (Main Menu) is set to Mass Storage.
Push and hold the power button for at least 3 seconds. This deenergizes the meter. Energize the meter again.
Note: Do not use this method to power off while in normal operation or if the file access icon is visible in the display.
Replacement parts and accessories
Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to the company website for contact information.
Replacement parts
Table 6 Velocity only sensor
Description
Sensor with 1.5 m (5 ft) cable
Sensor with 6.1 m (20 ft) cable
Sensor with 12.2 m (40 ft) cable
Sensor with 30.5 m (100 ft) cable
Item no.
1040500595-0N
1040500595-1N
1040500595-2N
1040500595-3N
Table 7 Velocity with depth sensor
Description
Sensor with 1.5 m (5 ft) cable
Sensor with 6.1 m (20 ft) cable
Item no.
1040500595-0D
1040500595-1D
English 29
Table 7 Velocity with depth sensor (continued)
Description
Sensor with 12.2 m (40 ft) cable
Sensor with 30.5 m (100 ft) cable
Table 8 Handheld meter
Description
English/Metric
Accessories
Table 9 General accessories
Description
Adjustable meter mount
Battery charger
Carrying case
Lanyard, double ended loop
Lithium ion battery
Thumb screw kit (includes four thumb screws)
Universal sensor mount
USB cable
Item no.
1040500595-2D
1040500595-3D
Item no.
1040500195-S
Item no.
10.405.405.9.5
97.850.039.9.5
10.405.401.9.5
10.405.403.9.5
97.820.021.9.5
10.405.418.9.5
10.405.419.9.5
97.120.412.9.5
Appendix
Mean-section and Mid-section methods
The user can select the Mean-section or the Mid-section method for flow calculations. The Meansection method divides the cross-section into individual flow segments. Pairs of adjacent verticals are the limits of the segments. The two edges of the cross-section are given values of 0 for the velocity and depth. The total flow is the sum of the partial flows of all segments.
definitions and the equation for the Mean-section method.
30 English
Figure 15 Mean-section method
Where:
V = velocity at vertical b = distance to vertical from bank h = depth at vertical q = flow at vertical
The Mid-section method also divides the cross-section into individual flow segments. With the Midsection method, the segments are not between verticals but are defined by half of the distance to neighbor verticals in each case. For this reason, the first and last verticals should be as near to the edges as possible (i.e., left edge of water (LEW) and right edge of water (REW)). Boundary conditions dictate the proximity of the first and last vertical to the edge of water.
Experience shows that the Mid-section method gives more exact results compared to the Mean-
section method so it is the default setting. Figure 16
shows the definitions and equation for the Midsection method.
English 31
Figure 16 Mid-section method
Where: m = station number n = total number of stations
V = velocity at vertical b = distance to vertical from bank h = depth at vertical q = flow at vertical
Profiles and measurements
in a conduit. In a typical profile, velocity is less near a wall or edge than at the center and decreases near the surface. Multiple velocity measurements in the profile are averaged to calculate the total flow. Measurements for conduit profiles are made from the bottom up. Measurements for stream profiles are made from the top down.
In the Main Menu, select Profiler. The meter prompts for the operator name, the type of profile
(stream or conduit) and the profile name. Do the instructions for the selected profile type.
32 English
Figure 17 Typical profile
1 Depth 2 Velocity
Site selection
A site with the typical profile shape gives the most accurate results. Visual inspection is typically sufficient to identify problem sites. Use the information in these guidelines to help select the best site.
These guidelines apply to conduit and stream profiles.
• The channel should have as much straight run as possible. If the length of the straight run is limited, the length upstream from the profile should be two times the downstream length.
• The channel should be free of flow disturbances. The site must not have protruding pipe joints, sudden changes in diameter, contributing side-streams, outgoing side-streams or obstructions.
Remove all rocks, sediment or other debris from the bottom of the pipe.
• The flow should not have visible swirls, eddies, vortices, back-flow or dead zones.
• Do not select areas immediately downstream from sharp bends or obstructions.
• Do not select areas with converging or diverging flow (approaches to a flume) or vertical drops.
• Do not select areas immediately downstream from sluice gates or places where the channel spills into a body of stationary water.
Do a velocity calibration
Use this feature to remove a velocity offset if necessary. The velocity offset stays active until the meter power is switched off.
1. Collect a bucket of water from the water in the profile area. The bucket must be non-metallic and at least 20.32 cm (8 in.). The water depth must be at least 15.24 cm (6 in.).
2. Put the sensor in the center of the bucket so that it does not touch the sidewall or the bottom of the bucket.
3. Let the water become still.
4. Let the velocity reading stabilize.
5. Select Zero Velocity.
Wet/Dry threshold
The wet/dry threshold is the trigger point for the meter to know when the sensor is in or out of the water. This information is important because if the meter does not know that the sensor is under the
English 33
surface of the water, the meter sets the velocity value to zero. For a profile or real-time reading, the meter prompts the user to submerge the sensor in the water.
If the specific conductivity of the water being measured is very low, adjust the threshold value for the best performance. Go to Setup Menu>Wet/Dry Threshold.
For troubleshooting, the present reading is used as a guide to set a custom threshold. Get a reading in the water (wet) and then out of the water (dry). The threshold value must be between the wet and dry value. For example, if the actual wet value is 17 and the actual dry value is 2, put in a threshold value half way between 2 and 17. The default value is 20.
34 English
OTT Hydromet
Ludwigstrasse 16
87437 Kempten, Germany
Tel. +49 (0)8 31 5617-0
Fax +49 (0)8 31 5617-209 [email protected]
www.ott.com
©
OTT Hydromet, 2012.
All rights reserved. Printed in U.S.A.
Hach Hydromet
5600 Lindbergh Drive
Loveland, CO 80538 U.S.A.
Tel. (970) 669-3050
(800) 949-3766 (U.S.A. only)
Fax (970) 669-2932 [email protected]
www.hachhydromet.com
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