OTT MF pro Basic Manuel utilisateur

DOC026.97.80211

MF pro

09/2018, Edition 7

Basic User Manual

Manuel d'utilisation de base

Manual básico del usuario

Manual Básico do Usuário

基本用户手册

基本取扱説明書

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

Français......................................................................................................................... 23

Español.......................................................................................................................... 44

Português...................................................................................................................... 65

中文................................................................................................................................. 86

日本語........................................................................................................................... 103

2

Table of contents

Specifications on page 3 Startup and self-test on page 19

General information on page 5 Maintenance on page 20

Installation on page 10 Troubleshooting on page 21

User interface and navigation on page 14

Expanded manual version

For additional information, refer to the expanded version of this manual, which is available on the

manufacturer's website.

Specifications

Specifications are subject to change without notice.

Sensor specifications

Specification Details

Velocity measurement

Method Electromagnetic

Range 0 to 6.09 m/s (0 to 20 ft/s)

Minimum water depth 3.18 cm (1.25 in.)

Accuracy ±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 0 ≤ value < 10: 3 decimal places; 10 ≤ value < 100: 2 decimal places; 100 ≤ value <

1000: 1 decimal place; value ≥ 1000: 0 decimal places

Zero stability ±0.015 m/s (±0.05 ft/s)

Material ABS, glass filled

Enclosure rating 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 2, 6.1, 12.2 and 30.5 m (6.5, 20, 40 and 100 ft)

Depth measurement

Method Diaphragm type: absolute pressure with single point calibration

Accuracy (static) The larger of ± 2% of reading or ± 0.015 m (± 0.504 inches). Steady state temperature

and static non-flowing water.

Range 3.05 m (0-10 ft)

Resolution 0 ≤ value < 10: 3 decimal places; 10 ≤ value < 100: 2 decimal places; 100 ≤ value <

1000: 1 decimal place; value ≥ 1000: 0 decimal places

English 3

Portable meter specifications

Specification Details

Pollution degree 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 –20 to 60 ºC (-4 to 140 ºF )

Enclosure rating IP67

Battery life gauge Five-segment bar graph

Battery type Rechargeable lithium ion, 3.6 V, 5.0 Ah, 18 Wh

Battery life 18 hours heavy typical day use1; 20 ºC (68 ºF)

Battery charger External power adapter, energy efficiency VI, 100–240 VAC, 50–60 Hz, 0.5 A input;

12 VDC, 1.25 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.)

USB connector Type Mini-B, 5-pin, rated to IP67 when capped

Material Polycarbonate with a thermoplastic elastomer (TPE) overmold

User interface specifications

Specification Details

Graphics display Color, LCD 3.5" QVGA transflective (readable in direct sunlight)

Measurement resolution 0 ≤ value < 10: 3 decimal places; 10 ≤ value < 100: 2 decimal places; 100 ≤ value <

1000: 1 decimal place; value ≥ 1000: 0 decimal places

Keypad Alpha-numeric

Operating modes Real time, profiling

Profile types Stream, conduit

Conduit shapes Circular, rectangular, trapezoidal, 2/3 egg, inverted 2/3 egg

Stream entries Fixed, non-fixed stations

Noise rejection User-selectable, 50 Hz or 60 Hz

Units of measure Velocity: ft/s, m/s, cm/s, mm/s

Flow: ft3/sec, million gal/day, gal/day, gal/min, m3/s, m3/min, m3/hour, m3/day, liters/s,

liters/min

Depth: in., ft, m, cm, mm

Stream flow calculation 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

1Defined 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.

4 English

Specification Details

Stream profiling methods 1, 2, 3, 4, 5 and 6 point (velocity method - USGS and ISO), 2 point KREPS method,

1 point surface method, 1 and 2 point ice method

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 Details

Maximum number of real-time files 50 each with up to 75 readings captured by the user.

Firmware 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.

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.

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.

English 5

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.

Certification

CAUTION

This equipment is not intended for use in residential environments and may not provide adequate protection to

radio reception in such environments.

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.

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.

6 English

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 an assembled system is shown in Figure 1. Refer to the documentation supplied with

the individual components or accessories for more information.

English 7

Figure 1 Assembled components

1 Portable meter 7 Sensor height lock/release screw (accessory)

2 Sensor height lock/release device 8 20 mm/HERES wading rod adapter (accessory)

3 Top setting wading rod (accessory) 9 20 mm wading rod (accessory)

4 Sensor cable 10 HERES wading rod (accessory)

5 Adjustable mount for portable meter 11 Sensor height lock/release screw

6 Sensor assembly

Sensor overview

Figure 2 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.

8 English

Figure 2 Sensor components

1 Sensor electrodes 5 Pressure cell (sensors with depth option)

2 Sensor body 6 Sensor with depth option

3 Sensor connection plug 7 Sensor without depth option

4 Sensor attachment thumb screw

Meter overview

Figure 3 shows the features of the meter.

Figure 3 Meter components

1 USB connection port26 Threaded hole for adjustable meter mount

2 Keypad 7 Slots for velcro or strap attachment

3 Meter display 8 Slot for neck strap attachment threads (2x)

4 Expansion port (not used) 9 Sensor connection port

5 Battery compartment cover 10 Battery charger connector

2Do not use the USB connection to charge the battery.

English 9

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.

Figure 4 System components

1 Carrying case (with slot for sensor cable) 8 Universal sensor mount

2 USB cable with mini-USB connector, 1 m (3 ft) 9 Velcro strap

3 Adjustable portable meter mount 10 Lanyard

4 Battery charger, 100–240 VAC 11 Portable meter

5 Sensor 12 Lithium battery pack

6 Extra thumb screws (4x) 13 Sensor as connected to meter inside case

7 Cloth to dry the sensor

Installation

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

contamination, refer to Clean the sensor on page 20.

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.

10 English

Lithium battery safety

WARNING

Fire and explosion hazard. Lithium batteries may get hot, explode or ignite and cause serious injury if

exposed to abuse conditions.

• Do not use the battery if there is visible damage.

• Do not use the battery after strong shock or vibration occurs.

• Do not expose the battery to fire.

• Keep the battery at temperatures less than 60 ºC (140 ºF).

• Keep the battery dry and away from water.

• Prevent contact between the positive and negative battery terminals.

• Do not let unauthorized persons touch the battery.

• Discard the battery in accordance with local, regional and national regulations.

• 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.

Install the battery

WARNING

Fire and explosion hazard. This equipment contains a high energy lithium battery which can ignite and

cause fire or explosion, even without power. To maintain the safety provided by the instrument

enclosure, the instrument enclosure covers must be installed and secured with the supplied hardware.

WARNING

Explosion and fire hazard. Battery substitution is not permitted. Use only batteries that are supplied by

the instrument manufacturer.

Install the supplied lithium battery as shown in Figure 5.

English 11

Figure 5 Install the battery

Charge the battery

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 in the expanded version of the manual.

Before initial use, fully charge the instrument battery with the supplied battery charger. A discharged

battery is fully charged in approximately 8 hours.

1. Make sure that the correct type of plug for the geographic location is installed on the battery

charger.

2. Connect the battery charger to an electrical outlet with earth ground.

3. Connect the battery charger to the battery charger connector on the instrument. Refer to Meter

overview on page 9. The battery level shows on the display.

A blue light shows around the charge port while the battery charges. When the charge process is

complete, the blue light goes off.

Note: The meter is not operational while the battery charges. The battery does not charge through the USB

cable connection.

Connect the sensor to the meter

12 English

Attach the lanyard

Attach the lanyard to wear the meter safely around the neck.

English 13

Attach the velcro strap

Use the velcro strap to hold the extra cable. Refer to Figure 6.

Figure 6 Attach the velcro strap

1 Loop side 2 Hook side

User interface and navigation

Keypad and key functions

Figure 7 shows the meter keypad. Table 1 gives the functions of each key or key type.

Figure 7 Keypad

1 Power On/Off 6 Main Menu

2 OK 7 Underscore or decimal

3 Up and Down arrows 8 Backspace

4 Quick Jump 9 Alpha-numeric

5 Right and Left arrows 10 Previous menu

14 English

Table 1 Key description

Key Description

Power On/Off 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. In profiler

operation, the Quick Jump key is disabled.

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 Moves the cursor back one space.

Alpha-numeric 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.

Previous menu 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

given in Table 2.

Table 2 Status bar indicators

Indicator Description

Time and Date Shows the current time and date.

USB 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.

Conductivity 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.

Battery A five-bar graph shows the level of charge in the battery.

File access Shows while the meter gets access to a file.

Auto zero depth

indicator

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.

English 15

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 8. Real time screens for sensors with both velocity and depth is

shown in Figure 9. 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 Description

Capture 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 real-

time 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.

Setup 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.

Files or

View

Shows a summary of each real-time file stored in non-volatile memory. Files can be

individually viewed and deleted.

Figure 8 Real time screen

16 English

Figure 9 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. A percentage of the remaining memory is given in 1%

resolution. Refer to the expanded version of the manual 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 Description

Velocity

calibration

Calibrates the sensor. Adds a field offset to the factory calibration. Refer to the appendix in

the expanded version of the manual for more information.

English 17

Option Description

Filter

parameters

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.

Wet/dry

threshold

Sets the sensor submersion threshold for wet and dry conditions. The default value is 20%.

Refer to the appendix in the expanded version of the manual for more information.

Auto zero

depth

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.

EMI Sets the local line frequency for ambient noise rejection to 50 Hz (default) or 60 Hz .

Clock Sets the date and time of the portable meter in 24-hour format. Daylight savings time is not

supported.

USB 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.

Language Selects the language used in the menus.

Units Sets the units for velocity, flow and depth measurements. Options are Metric (default) or

English .

Beeper 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.

• 95% of the measurement time is complete (profiler mode).

• An inactive button is pushed in any menu.

This feature is available only with the optional depth sensor.

Flow

calculation

Selects the method of flow calculation for open water segment (stream profiles only).

Options are Mean-section or Mid-section. Refer to the appendix in the expanded version of

the manual for more information.

18 English

Option Description

Station entry • 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.

• Fixed and Non-fixed—The operator selects the reference plane for depth

measurements. Values: Top or Bottom.

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 21.

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.

WARNING

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 the battery on page 11. For information on how to

charge the battery, refer to Charge the battery on page 12.

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.

Instrument self test

The meter does a diagnostic self-test when energized. After the self-test is complete, the display

shows the self-test results. Push OK to go to the Main Menu.

If the meter fails the self-test, the display shows FAIL next to the parameter in question. If the sensor

fails, attach a different sensor if available.

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.

English 19

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.

Maintenance

Clean the sensor

WARNING

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 safety data sheets

(MSDS/SDS) 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

Table 3 to clean the sensor. For sensors with a pressure cell (i.e., velocity plus depth sensors), make

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 3 Acceptable and unacceptable cleaning solutions

Acceptable Do not use

Dish detergent and water Concentrated bleach

Window cleaner Kerosene

Isopropyl alcohol Gasoline

Aromatic hydrocarbons

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.

Replace the battery

WARNING

Fire and explosion hazard. This equipment contains a high energy lithium battery which can ignite and

cause fire or explosion, even without power. To maintain the safety provided by the instrument

enclosure, the instrument enclosure covers must be installed and secured with the supplied hardware.

20 English

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