Hontzsch ExactSonic III User manual

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ExactSonic III
Portable Ultrasonic Flow Meter
Operating Instructions

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Contents
1General Description.........................................................................................................................................4
1.1 Introduction.................................................................................................................................................4
2Principle of Operation......................................................................................................................................4
2.1 Reflex (V) Mode..........................................................................................................................................6
2.2 Double Reflex (W) Mode ............................................................................................................................6
2.3 Triple Reflex (WV) Mode ............................................................................................................................6
2.4 Quadruple Reflex (WW) Mode ...................................................................................................................6
2.5 Diagonal Mode............................................................................................................................................6
3Scope of Delivery.............................................................................................................................................7
3.1 ExactSonic III Instrument............................................................................................................................8
3.1.1 Connections........................................................................................................................................8
3.1.2 Keypad................................................................................................................................................9
4Installation......................................................................................................................................................11
4.1 Transducer Positioning.............................................................................................................................11
4.2 Attaching the Transducers........................................................................................................................12
4.2.1 Preparation........................................................................................................................................12
4.2.2 Assembling the Guide Rails..............................................................................................................12
4.2.3 Fitting the transducers ......................................................................................................................13
4.3 Connecting Outputs..................................................................................................................................14
4.4 Connecting the Power Supply...................................................................................................................15
4.4.1 Charging the Battery.........................................................................................................................15
4.4.2 Optimising Battery Life......................................................................................................................15
4.5 Initial use and adjustment of the instrument.............................................................................................16
4.5.1 Checking System Health...................................................................................................................16
4.5.2 Selecting a Language .......................................................................................................................16
4.5.3 Setting Date & Time..........................................................................................................................17
4.5.4 Enabling/Disabling the Backlight.......................................................................................................17
5Using the Quick Start Menu...........................................................................................................................18
5.1 Entering the Site Data...............................................................................................................................18
5.2 Attaching and Connecting the Transducers..............................................................................................20
5.3 Taking a Flow Reading.............................................................................................................................20
5.4 Flow Monitoring.........................................................................................................................................20
5.5 Total Flows................................................................................................................................................20
5.5.1 Calculating the Average Flow ...........................................................................................................21
5.5.2 Resetting Totals................................................................................................................................21
6Managing Named Sites .................................................................................................................................22
6.1 Selecting an Existing Site..........................................................................................................................22
6.2 Adding a New Site.....................................................................................................................................23
6.3 Changing a Site Name..............................................................................................................................23
6.4 Editing Site Data .......................................................................................................................................23
6.5 Calibration of the Instrument.....................................................................................................................24
6.5.1 Adjusting the Zero Cutoff..................................................................................................................24
6.5.2 Adjusting the Zero-Flow Offset (ZFO)...............................................................................................24
6.5.3 Adjusting the Calibration Vactor........................................................................................................24
6.5.4 Adjusting the Roughness Factor.......................................................................................................25
6.5.5 Adjusting the Damping Factor...........................................................................................................26
7Logging Functions .........................................................................................................................................26
7.1 Manual Logging.........................................................................................................................................26
7.2 Scheduling Logging...................................................................................................................................27
7.3 Stopping Logging......................................................................................................................................27
7.4 Copying Logged Data to a USB Memory Stick.........................................................................................27
7.5 Clearing Log Files von Protokolldateien ...................................................................................................28
7.6 Logger Status............................................................................................................................................28
8Outputs..........................................................................................................................................................29

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8.1 Current Loop Setup / Analog Output.........................................................................................................29
8.1.1 Converting the Measured Current to Flow Rate ...............................................................................30
8.2 Digital Outputs ..........................................................................................................................................31
8.2.1 Pulse Output .....................................................................................................................................32
8.2.2 Volumetric Pulse...............................................................................................................................32
8.2.3 Alarm Output.....................................................................................................................................32
8.2.4 Frequency Output .............................................................................................................................34
9NiMh Power Screen.......................................................................................................................................34
9.1 Power Checklist........................................................................................................................................34
10 Primary Flow.............................................................................................................................................35
11 Maintenance and Repair...........................................................................................................................36
12 Troubleshooting........................................................................................................................................37
12.1 Overview...................................................................................................................................................37
12.2 General troubleshooting procedure ..........................................................................................................38
12.3 Warning and Status Messages.................................................................................................................39
12.4 Test Block.................................................................................................................................................43
12.5 Reset.........................................................................................................................................................44
12.6 Diagnostics ...............................................................................................................................................44
12.6.1 Advanced Diagnostics ..................................................................................................................45
13 Appendix...................................................................................................................................................46
13.1 Technical Data..........................................................................................................................................46
14 Declaration of conformity, Declaration of Incorporation............................................................................49

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1General Description
1.1 Introduction
This manual describes the operation of the ExactSonic III portable flowmeter. The flowmeter is designed to
work with clamp-on transducers to enable the flow of a liquid within a closed pipe to be measured accu-
rately without needing to insert any mechanical parts through the pipe wall or protrude into the flow sys-
tem.
Using ultrasonic transit time techniques, the ExactSonic III is controlled by a microprocessor system which
contains a wide range of data enabling it to be used with pipes with an outside diameter ranging from
13 mm to 2000 mm and constructed of almost any material. The instrument will also operate over a wide
range of fluid temperatures.
Easy to operate, the ExactSonic III standard features are:
•large, easy to read graphic display with backlighting
•simple to follow duak function keypad
•simple ‘Quick Start’ set up procedure
•continuous signal monitoring
•3 isolated switched outputs for use in any combination as a
oPulse output (volume)
oFrequency output (flow)
oAlarm output (flow, volume, flow signal quality)
•current output with a selectable range between 0 and 24 mA (e.g. 4 … 20mA), including support for
an alarm current
•rechargeable battery
•battery management
•diagnostics
Volumetric flow rates are displayed in: l/s, l/min, l/h, m³/s, m³/min, m³/h, Ml/s, Ml/min, Ml/hr, Ml/day,
USgals/sec, USgals/min, USgals/h, USgals/day, Barrel/h, Barrel/day, ft3/sec, ft3/min, ft3/hr, MUSgal/hr),
MUSgal/day, Imp Gals/sec, Imp. Gal/m, Imp Gals/hr, Imp Gals/day, Barrels/hr, Barrels/day.
Flow velocity is displayed in metres or feet per second.
When operating in the 'Flow Reading' mode the integrated volume (or amount), is displayed as a 12-digit
number with correct sign.
The flowmeter can be used to measure liquids with less than 3% volume of solids content. An appli-cation
for cloudy liquids such as rivers and wastewater is also possible as well as for demineralised water.
Typical ExactSonic III applications are
•river water
•sea water
•potable water
•demineralised water
•treated water
2Principle of Operation
When ultrasound is transmitted through a liquid the speed at which the sound travels through the liquid is
accelerated slightly if it is transmitted in the same direction as the liquid flow and decelerated slightly if
transmitted against it. The difference in time taken by the sound to travel the same distance but in oppo-
site directions is therefore directly proportional to the flow velocity of the liquid.
The ExactSonic III system employs two ultrasonic transducers attached to the pipe carrying the liquid and

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compares the time taken to transmit an ultrasound signal in each direction. If the sound characteris-tics of
the fluid are known, the ExactSonic III microprocessor can use the results of the transit time calculations
to compute the fluid flow velocity. Once the flow velocity is known, the volumetric flow can be calculated
easily for a given pipe diameter. The ExactSonic II can be set up to operate in one of five modes deter-
mined mainly by the pipe diameter and the type of transducer set in use. The diagram below illustrates the
importance of applying the correct separation distance between the transducers to obtain the strongest
signal.
Reflex (V) mode
(single bounce)
Reflex (W) mode
(double bounce)
Reflex (WV) mode
(triple bounce)
Reflex (WW) mode
(quadruple bounce)
Diagonal mode
(without bounce)
Abbildung 2.1 Messmodi
Figure 2.1 Operationg Modes

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2.1 Reflex (V) Mode
This is the most commonly used mode. The two transducers (U & D) are attached to the pipe in line with
each other and the signals passing between them are reflected by the opposite pipe wall.
The separation distance is calculated by the instrument in response to entered data concerning the pipe
and fluid characteristics.
2.2 Double Reflex (W) Mode
In this mode the separation distance is calculated to give a double bounce*. This is most likely to occur if
the pipe diameter is so small that the calculated reflex mode separation distance would be impractical
for the transducers in use.
2.3 Triple Reflex (WV) Mode
This mode goes one step further to show a triple bounce* situation. This would normally apply when work-
ing with very small pipes relative to the transducer range in use.
2.4 Quadruple Reflex (WW) Mode
This mode goes one step further again, to use a quadruple bounce*. Again this would normally apply when
working with very small pipes relative to the transducer range in use.
2.5 Diagonal Mode
This mode might be selected where relatively large pipes are concerned. In this mode the transducers are
located on opposite sides of the pipe but the separation distance is still critical in order for the signals to be
received correctly.
* In general, if should be noted that errors accumulate as the number of bounces increase. Units are cali-
brated using single reflex mode. Any inherent inaccuracy will be amplified by using higher order modes
such as triple or quadruple bounce. In addition to this, as the path length is longer, the signal will also be
more attenuated with higher order operating modes.

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3Scope of Delivery
The ExactSonic III equipment is supplied in a rugged IP67 carrying case fitted with a foam insert to give
added protection for transportation. The supplied components are shown below in figure 3.1.
Standard equipment
1ExactSonic III instrument with backlit graphic display
2. Power supply with UK/US/European adapters, 110/240VAC
3. Output signal cable (current loop & 3 digital outputs)
4. Transducer cables (2x) each 2 m long
5. Chains (2x), each 3.3 m long
6. Guide rails (2x) for use with A or B type transducers
7. Ultrasonic couplant
8. Tape measure
9. Transducer set „A“ for use on pipes with 13 mm to 115 mm outside diameter.
Transducer set „B“ for use on pipes with 50 mm to 2000 mm outside diameter.
10. Test block
11. Syringe (for the application of the couplant during installation)
12. Ruled separation bar (two pieces)
13. USB stick
Figure 3.1 Standard Equipment
1
2
3
4
4
5
5
6
6
7
8
9
9
10
11
12
11
13
11

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3.1 ExactSonic III Instrument
The ExactSonic III is a microprocessor controlled instrument, operated through a menu system using an
inbuilt LCD and keypad. It can be used to display the instantaneous fluid flow rate or velocity, together
with totalised values.
The instrument can also provide a variable current or variable ‘pulse’ (volumetric or flow frequency) output
that is proportional to the detected flow rate. In addition to this, the instrument can also be used to signal
alarm conditions such as flow too high, too low or a volume being exceeded. This output can be calibrated
to suit a particular flow range and used with a range of external interface devices, such as those found in
building management systems or site monitoring systems. The three isolated outputs provided can be con-
figured as required in any order and with any functionality as just mentioned.
3.1.1 Connections
Figure 3.2 Front and top view
Top view
Output cable
connector
USB socket
Transducer cable
connectors
Output cable
connector
Transducer cable
connectors
USB socket
Front view
Battery charging point (power supply)

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Transducer cable connectors
The transducers are connected to two colour-coded miniature coaxial sockets located on the top of the
instrument. Using the red/blue connector cables provided, the upstream transducer should always be
connected to the RED socket and the downstream transducer to the BLUE one for a positive flow reading.
It is safe to connect or disconnect the cable while the instrument is switched on (see figure 3.2).
USB socket
USB memory sticks can be inserted here so that recorded logger data can be transferred (see figure 3.2).
Output cable connector
The current/’pulse’output cable should be connected to the 9-pin connector on the top of the flowmeter.
The 'tails' on the free end of the cable must be terminated to suit the intended application (see under 4.3).
Battery charger connection (power supply)
The supplied battery charger is connected tot he instrument by means oft he grey 2-pin connector at the
base of the unit as shown in figure 3.2. More info see under 4.4.
Note: The above connectors have different key-ways to prevent incorrect cable connection.
3.1.2 Keypad
The instrument is configured and controlled via a 16-key tactile membrane keypad as shown in figure 3.3.
ON/OFF Key
The ON/OFF key is shown on the top left of the keypad. When turned ON an initialisation screen is dis-
played on the LCD showing the instrument’s serial number and software revision.
Once this appears, the instrument can be started by pressing the ENTER key once –the initialization
screen is then re-placed by a MAIN MENU which provides access to the remaining functions.
Menus and the menu selection keys
The ExactSonic III menus are arranged hierarchically with the MAIN MENU being at the top level. Menu
navigation is achieved by three keys on the right hand side of the keypad which are used to scroll UP and
DOWN a menu list and SELECT a menu item. When scrolling through a menu an arrow-shaped cursor
moves up and down the left hand side of the screen to indicate the active menu choice which can then be
selected by pressing the ENTER (SELECT) key. Some menus have more options than can be shown on the
screen at the same time, in which case the 'overflowed' choices can be brought into view by continuing to
scroll DOWN past the bottom visible item. If you select Exit it usually results in taking you back one level in
Figure 3.3 Keypad
Numerical keypad
with dual function keys
ON/OFF
Scroll UP
Scroll DOWN
ENTER (Select)
Scroll LEFT
Scroll RIGHT

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ExactSonic MAIN
↱ Quick start..
View / Edit Site Data..
Setup Instrument..
Data Logger..
Read Flow..
19-01-23 13:45:42
the menu hierarchy, but in some cases it may go directly to the FLOW READING screen. Some screens
require you to move the cursor left and right along the display as well as up and down. This is achieved
using keys 5 (scroll LEFT) and 6 (scroll RIGHT).
Dual Function Numerical Keypad
The block of keys shown in the centre of the keypad in figure 3.3 are dual function keys. They can be used
to enter straightforward numerical data, select the displayed flow units or provide quick access to fre-
quently required control menus.
Key
Use
0
Switch between READ FLOW and READ VELOCITY screens (via a short
press when reading flow or velocity), enter the SET ZERO FLOW screen
(long press when reading flow), or freeze and un-freeze diagnostic values
in the DIAGNOSTIC screen.
1
Display the LOGGER menu (see under 7).
2
Display the SYSTEM SETTING menu (see under 4.5.1).
3
Display the OUTPUT SETUP menu (see under 8)
4
Switch to READ VELOCITY from the READ FLOW display
5
No function –reserved for future use
6
No function –reserved for future use
7
Cycle through the available display units
8
Switch to READ FLOW from the READ VELOCITY display
9
No function –reserved for future use
Delete
+/-
No shortcut function: within text entries, deletes character to left of flash-
ing cursor. Deletes alarms when activated, or return to the MAIN MENU
from the SUMMARY screen
Diags
.
Display the DIAGNOSTICS screen (see under 12.6)
Main Menu
Figure 3.4 MAIN MENU

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DOWNSTREAM
5 x pipe diameter
UPSTREAM
10 x pipe diameter
45°
Uniform flow profile
Distorted flow profile
Luft
Schlick
4Installation
4.1 Transducer Positioning
In many applications an even flow velocity profile over a full 360° is unattainable due, for example, to the
presence of air turbulence at the top of the flow and possibly sludge in the bottom of the pipe. Experience
has shown that the most consistently accurate results are achieved when the transducer guide rails are
mounted at 45° with respect to the top of the pipe.
The ExactSonic III equipment expects a uniform flow profile as a distorted flow will produce unpredictable
measurement errors. Flow profile distortions can result from upstream disturbances such as bends, tees,
valves, pumps and other similar obstructions. To ensure a uniform profile the transducers must be mount-
ed far enough away from any cause of distortion such that it no longer has an effect.
To obtain the most accurate results, the condition of both the liquid and the pipe must be suitable to allow
ultrasound transmission along the predetermined path.
It is important that the liquid flows symmetrically within the measuring section and that the flow profile is
not distorted by upstream or downstream obstacles. This is ensured by having a straight length upstream
oft he transducers of at least 10x the pipe diameter, and 5x the pipe diameter on the downstream side
(see under 4.1).
Figure 4.1: Location of unit

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The measurement can also be carried out in shorter, straight pipe sections. However, the measurement
uncertainty increases undefined if the transducer is placed too close to obstacles.
REMARK: If there is no sufficient inlet and outlet section, the measurement uncertainty will increase.
4.2 Attaching the Transducers
Type 'A' & 'B’ transducers are fitted to adjustable guide rails. These in turn are secured to the pipe using
wrap-around chains and mechanically connected together by a steel separation bar. The separation bar
also acts as a ruler to allow the distance between the transducers to be accurately set to the value deter-
mined by the ExactSonic III instrument.
When fitting the guide rails it is easiest to assemble them onto the separation bar and adjust to the re-
quired separation distance before attaching them to the pipe.
4.2.1 Preparation
1. Before you attach the transducers you should first ensure that the proposed location satisfies the
distance requirements shown in Figure 4.1 otherwise the resulting accuracy of the flow readings may
be affected.
2. Prepare the pipe by degreasing it and removing any loose material or flaking paint in order to obtain
the best possible surface. A smooth contact between pipe surface and the face of the transducers is
an important factor in achieving a good ultrasound signal strength and therefore maximum accuracy.
4.2.2 Assembling the Guide Rails
Figure 4.2 Guide rail assembly

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1. Slide the separation bar (D) into the front of the left-hand guide rail, align the front edge of the
guide rail with ‚0‘ on the ruler scale (E) and secure it in place by tightening the thumbscrew (C).
2. Slide the other end of the separation bar into the front of the right-hand guide rail, align the front
edge of the guide rail to the required separation distance (obtained from the ExactSonic III instru-
ment) on the ruler, then secure it in place by tightening the thumbscrew.
3. On each guide rail, attach one end of a securing chain to a hook on the tensioning bar (B), wrap the
chain around the pipe (G) and then attach it to the hook on the other end of the tensioning bar
whilst keeping the chain as tight as possible.
4. Rotate the complete guide rail assembly so that it is approximately 45° with respect to the top of the
pipe. Then tighten the chain by turning the tensioning thumb-wheel (A) on each guide block until the
assembly is securely attached to the pipe.
Note: If you are unable to get sufficient tension on the chain to hold the assembly in place, fully slacken
the tensioning thumb-wheel and shorten the effective length of the chain wrapped around the pipe by con-
necting the tensioning bar to the next link in the chain, then re-tension.
4.2.3 Fitting the transducers
1. Slide the transducer cover plate (A) fully towards the outside of the guide assembly to allow
sufficient access to fit the transducer.
2. Clean the face of the transducer, removing all traces of dirt and grease.
3. Apply a 3mm bead of ultrasonic couplant along the centre length of the transducer (E)
(see Figure 4.3).
4. Fit the transducer into the guide block –ensuring the lugs on the sides of the transducer are
correctly located into the slots on the sides of the guide block (B).
5. Slide the transducer cover plate (A) over the top of the transducer and tighten the thumbscrew (C)
finger tight to secure the transducer in place. When securing the cover plate take care to leave
sufficient room around the transducer connector (D) to connect the cable.
6. Repeat the above steps for the second transducer.
7. Connect the transducers to the ExactSonic III instrument using the coaxial cables provided. The RED
cable must be connected to the upstream transducer and the BLUE cable to the downstream
transducer.
Figure 4.3 Fitting the transducers

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4.3 Connecting Outputs
The output cable provides a current source that can drive a maximum load of < 600Ω and 3 digital output
pairs for pulse, frequency or alarm outputs.
The isolated pulse output is provided by a SPNO/SPNC MOSFET relay which has a maximum load current of
500mA and maximum load voltage of 24V AC/DC.
This output is suitable for SELV circuits only.
The pulse output is a Volt or potential free contact and when selected as an alarm, is configurable as
NO/NC.
The current output is available on the white (high polarity) and black (low polarity) wire pairs (pins 1+2 on
the connector). The alarm current due to an out-of-bounds condition must be set outside the working
range.
Using the instrument’s menu system (see under 8), you can:
•Select the current output function Off/On
•Select the current output range (set the current range, where 4-20mA, 0-20mA, 0-16mA are com-
mon ranges), but the device is capable of generating currents of up to 24mA
•Calibrate the current output signal to a required flow range
•Select the alarm cause (and alarm current for the current output)
•Set a trigger value for the alarm when it is associated with ‚Under Value‘ or ‚Exceeds Value‘
•Set current trim values to accommodate any inaccuracies in the user’s system
The three digital output pairs for pulse or alarm outputs are as follows
Output
Pin
Wire pair
Output 1
Pin 3 + 4
Brown/White
Output 2
Pin 5 + 6
Red/White
Output 3
Pin 7 + 8
Orange/White
Fig. 4.4 Output Wiring

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4.4 Connecting the Power Supply
Operating power is provided by an internal battery that can be charged from the utility supply using the
supplied external charger. When you first receive the unit, you should charge the battery for a minimum of
15 minutes before use. It is possible to use the unit while the battery is charging but if the charging fails
the unit may automatically switch off. A fully charged battery will power the instrument for up to 13 hours
depending on the output utilisation and backlight usage.
4.4.1 Charging the Battery
1. Connect the external battery charger to the charger socket at the bottom of the instrument then
switch on the utility supply.
2. When switched on, the instrument indicates charging with an animated battery symbol to the left of
the date. It will also indicate that the device is being powered externally by a plug symbol in the top
status line.
3. Leave the instrument on charge for at least 15 minutes before using it for the first time.
4.4.2 Optimising Battery Life
The backlight can be configured in the Setup Instrument menu (see under 4.5.4) to be either permanently
OFF, timed to switch off after 5-120 s of keypad inactivity, or permanently ON. If the backlight is active
continuously it will reduce the available battery operating time to around 10 hours (depending on output
conditions). Similarly, if the current loop output is used constantly at high currents, the battery life may be
reduced even further. It is therefore beneficial to turn off the backlight and current loop output facilities
when they are not required.
A warning message is triggered if the internal battery voltage falls below a set threshold, at which point
there are tens of minutes of battery operation remaining (depending on usage). If the battery is left to
discharge further, the unit is designed to shut down before the battery is completely exhausted. In this
situation, all operations, including logging, will be stopped.
The battery can be charged either while the instrument is in use or when switched off.
The instrument’s internal data is stored in non-volatile memory and will not be lost even if the battery dis-
charges completely.
The battery is not a user-changeable item. The instrument must be returned to Höntzsch if the bat-
tery needs replacing.
Only use the supplied charger, or special adaptor lead. Failure to comply with this will invalidate
your warranty.

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ExactSonic
DD-MM-YY HH:MM:SS
Quick start..
View / Edit Site Data..
→Setup Instrument..
Data Logger..
Read Flow..
Read Energy..
4.5 Initial use and adjustment of the instrument
Before using your ExactSonic III for the first time, you should first charge the battery as described above,
then select the screen language and set the internal clock.
Switch on the instrument by pressing and holding down the ON/OFF button for about 2 to 3 seconds. Wait
for the banner screen to be fully displayed. The battery symbol in the top right of the screen roughly indi-
cates the level of the battery charge.
Press the ENTER key to display the MAIN menu.
4.5.1 Checking System Health
This operation should be checked after powering up the unit for the first time, but it is useful to check peri-
odically that all systems are operating properly, especially if errors were reported when entering the MAIN
menu.
1. From the MAIN menu, use the UP/DOWN scroll keys to select ‚Setup Instrument ‘.
Press the ENTER key.
2. It should be noted that a status message will appear to the right of the option name. If the sub-
system implementing the option is working correctly, the status will read “OK”. If any subsystem has
a fault, two dashes will be visible.
3. If a subsystem is NOT reading OK at start-up, try restarting the ExactSonic III by turning it off then
on again. If the error persists, contact your distributor or return the item for repair.
4.5.2 Selecting a Language
When you turn on the Exactsonic II for the first time, you may be asked to select a user language. To
change the language:
1. From the MAIN menu, use the UP/DOWN scroll
keys to select ‚Setup Instrument‘. Press ENTER
key. With ‚System‘ selected in the OPTIONS
menu, press the ENTER key.
2. Use the UP/DOWN arrow keys to select
‚Language‘. Press the ENTER key.
3. Use the UP/DOWN arrow keys to scroll through
the available options.
4. With the required language highlighted, press
the ENTER key.
5. Use the UP/DOWN arrow keys to select ‚Save Setup & Exit‘. Press the ENTER key.
The selected language is now active for all screens.

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4.5.3 Setting Date & Time
1. From the MAIN menu, use the UP/DOWN scroll
keys to select ‚Setup Instrument‘. Press the EN-
TER key. With ‚System‘ selected in the OPTIONS
menu, press the ENTER key.
2. Use the UP/DOWN arrow keys to select ‚Set Date
& Time‘. Press the ENTER key.
Das SET DATE & TIME menu ist displayed.
3. The instrument is configured to display dates in
DD-MM-YY format. Proceed to step 6 unless you
prefer to use MM-DD-YY format.
4. Use the UP/DOWN arrow keys to select ‚Mode‘.
Press the ENTER key.
5. Use the UP/DOWN arrow keys to choose the
required format: DD-MM-YY or MM-DD-YY. Press
the ENTER key. The date and time format will
immediately be updated.
6. Use the UP/DOWN arrow keys to select ‚Set Date
& Time‘. Press ENTER. A flashing cursor appears
under the first date number. Enter the date and
time sequence in DD-MM-YY-HH-MM-SS format then press the ENTER key.
7. Scroll down and select ‚Exit‘then Press the ENTER key to return tot eh MAIN menu.
NOTE: If you make a mistake when entering the data press the DELETE +/- key to move the cursor back to
the number you wish to change, then continue. If you enter an invalid number an 'ERR: invalid date or
time' or 'Badly formatted date or time' error message is displayed on the second line of the screen. If this
occurs repeat the Set Date & Time procedure.
4.5.4 Enabling/Disabling the Backlight
When the backlight is on, the display lights up for a few seconds each time a button is pressed. If the
backlight is not required it is recommended that you disable it to prolong the battery discharge time.
1. From the MAIN menu, use the UP/DOWN scroll
keys to select ‚Setup Instrument‘. Press the EN-
TER key. With ‚System‘ selected in the OPTIONS
menu, press the ENTER key.
2. Use the UP/DOWN arrow keys to select ‚Back-
light mode‘. Press the ENTER key.
3. Use the UP/DOWN arrow keys to scroll through
the available options: On/Timed/Off.
4. With the chosen mode selected, press the ENTER
key.
5. If you selected ‚Timed‘, use the UP/DOWN arrow keys to select to ‚Back-light Timeout‘. Press the
ENTER key.
6. Use the keypad to enter the required timeout interval (5-120 s) ein. Press the ENTER key.
7. Select ‚Save Setup & Exit‘ then press the ENTER key to return to the OPTIONS menu.
8. Select ‚Exit‘ then press the ENTER key to return to the MAIN menu.
System Settings
DD-MM-YY H:MM:SS
Lock-screen Timeout
Back-light mode
Back-light Timeout
↱Set Date & Time..
Reset Totals..
Damping
90
ON
75
sec
sec
10
sec
Set Date & Time
DD-MM-YY HH:MM:SS
↱Set Date & Time
Mode
Exit
DD-MM-YY.HH:MM:SS
DD-MM-YY
System Settings
DD-MM-YY HH:MM:SS
↱Back-light mode
Back-light Timeout
Audible keypress
Set Date & Time..
Display Total Re-
set Totals..
On
75
Off
sec
Both

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Pipe Wall Mater
TT-MM-JJ HH:MM:SS
↱Pipe wall material Plastic
Continue..
Main Menu..
5Using the Quick Start Menu
If you want to perform a 'one-off' flow reading at a particular pipe location the Quick Start menu pro-vides
the quickest way to set up the ExactSonic II system and access the FLOW READING screen.
If the point at which you intend to take the measurement is likely to require regular monitoring it is best to
set it up as a „Site“ within the ExactSonic III, which then stores the site parameters (see under 6).
Before you can use the ExactSonic III you need to obtain the following details (this information will be re-
quired when setting up the Quick Start menu):
•pipe outside diameter
•pipe wall thickness and material
•pipe lining thickness and material
•type of fluid
•fluid temperature
5.1 Entering the Site Data
1. Select ‚Quick Start‘from the MAIN Menu and press ENTER. You will then be presented with a series
of screens in which to enter the data mentioned above.
2. Enter the pipe outside diameter dimension (15 -
2000 mm or its circumference (47.1 –6283.2
mm). When you enter one value the other is cal-
culated from it.
Select CONTINUE and press the ENTER key.
3. Enter the pipe wall thickness dimension
(0.5 - 50 mm).
Select CONTINUE and press the ENTER key.
4. Choose the pipe wall material: ‚Plastic/Cast
Iron/Ductile Iron/Copper/Brass/
Concrete/Glass/Other (m/s) Mild Steel/S’less Steel
316/S’less Steel 303‘.
If the material is not listed, select ‚Other (m/s)‘
and enter the propagation rate of the pipe wall
material in m/s.
Select CONTINUE and press the ENTER key.
Pipe Outside Di
TT-MM-JJ HH:MM:SS
↱Pipe outside diameter 114.30 mm
Pipe circumference 359.08 mm
Continue ..
Main Menu..
Pipe Wall Thick
TT-MM-JJ HH:MM:SS
↱Pipe wall thickness
Continue ..
Main Menu..
8.00
mm

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Pipe Lining
TT-MM-JJ HH:MM:SS
↱Lining material Glass
Continue..
Main Menu..
5. Choose the pipe lining material from the following
options: ‚None/Rubber/Glass/Epoxy/Concrete‘
If the material is not listed, select ‚Other (m/s)‘
and enter the propagation rate of the pipe lining
material in m/s.
Select CONTINUE and press the ENTER key.
6. If no lining material was entered, go to step 7.
Otherwise, enter the lining thickness (0 - 40 mm).
Select CONTINUE and press the ENTER key.
7. Select the fluid type from the following options:
‚Water/ Glycol/water 50% / Glycol/water 30 % /
Lubricating oil/Diesel/Freon/Others (m/s)‘.
If the fluid is not listed, select ‚Others (m/s)‘ and
enter the propagation rate of the fluid in m/s.
Select CONTINUE and press the ENTER key.
8. Enter the fluid temperature (-30 –135.0 °C) at
the point the sensor is installed.
Select CONTINUE and press the ENTER key.
9. The SUMMARY screen is displayed. This displays a
summary of the entered parameters and informs
you of the type of sensor to be used, the mode of
operation and the distance to set up between the
sensors.wird geöffnet.
In this example, A-ST (A standard) sensors are
recommended, operating in the ‚Reflex‘ mode,
spaced at 69.9 mm apart.
NOTE: Do not press the ENTER key until the correct transducers are fitted and connected to the instru-
ment. If the data contains a mistake, press the DELETE key to return tot he MAIN Menu and restore the
previous settings.
Pipe Lining Thi
TT-MM-JJ HH:MM:SS
↱Pipe Lining thickness
Continue..
Main Menu..
1.0
mm
Fluid Type
TT-MM-JJ HH:MM:SS
↱Select fluid type
Continue..
Main Menu..
water
Fluid Temperatu
TT-MM-JJ HH:MM:SS
↱Fluid temperature
Continue..
Main Menu..
14.0°C
Summary
TT-MM-JJ HH:MM:SS
Site: Quickstart
Sensor separation: 69.9mm
Pipe OD: 114.3mm, ID 98.3mm
Sensor Type A-ST, Mode: Reflex
Fluid type: water @14.0°C
Press↵ to continue, △▽to select sens.
drücken

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10. If you prefer to use a different configuration, press
the UP/DOWN arrow keys to select a different
sensor set and mode.
NOTE: The SENSORS screen will be displayed automati-
cally if the entered pipe OD and/or temperature are not
valid for the currently selected sensors.
5.2 Attaching and Connecting the Transducers
1. Fit the designated sensors to the pipe using the appropriate guide rails as described under chapter
4.2. Take great care to set the separation distance as accurately as possible.
2. Connect the red and blue coaxial cables between the sensors and the instrument, ensuring that the
red connector on the instrument is connected to the 'upstream' sensor.
5.3 Taking a Flow Reading
1. Once the transducers have been fitted and
connected press the ENTER key.
2. This will take you to the FLOW READAING screen
via a signal-checking screen.
3. Check that the indicated signal strength on the
left of the screen is at least 2 bars (ideally 3 or 4).
If less than 2 bars are shown it indicates there
could be a problem with the transducer spacing,
alignment or connections; or it could be due to an application problem.
4. The Q value indicates the signal quality and should have a value of 60% or greater.
5.4 Flow Monitoring
From the READ FLOW, or VELOCITY screen you can:
•Switch to the READ VELOCITY display by pressing key 4 ‚Velocity‘.
•Switch back to the READ FLOW display by pressing key 8 ‚Flow‘.
•Switch between valid screens every 10 seconds by briefly pressing key 0. Pressing 0, 4, 8 or 9 stops
this action.
•Enter the ZERO-FLOW screen by a long press of the 0 key.
•Change the display units by pressing key 7 ‚Units‘.
5.5 Total Flows
The flow value indicated on the READ FLOW screen is the instantaneous flow rate, which in some applica-
tions may vary over a period of time. Average flow rates are therefore often required in order to get a bet-
ter understanding of an application’s true performance. This is simply achieved by noting the total flow
over a specific period (for example 30-60 minutes) and then calculating the average flow rate over that
period of time. By default, the READ FLOW screen shows both the forward and reverse flow totals.
Sensors
TT-MM-JJ HH:MM:SS
↱Sensor Set
Sensor Mode
A-ST
Reflex
Return to Summary Screen..
Main Menu..
READ FLOW DD-MM-YY HH:MM:SS
Q60.0%
27.540 l/min
27.0 l
0.1 l
+
-
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