Full Text Searchable PDF User Manual
NT 208D GB1
1 / 20
User Manual
Minisonic 600 dual chord
(Minisonic_600-2)
Minisonic 2000 dual chord
(Minisonic_2000-2)
Bâtiment TEXAS
Éragny Parc
9, Allée Rosa Luxemburg
95610 ÉRAGNY, FRANCE
Tél : 33 (0)1 30 27 27 30
Fax : 33 (0)1 30 39 84 34
www.ultraflux.net
Ultraflux NT 208D GB 1
Révision : 29/04/2013
NT 208D GB1
2 / 20
PREAMBLE :
Thank you for choosing Ultraflux to make your flow measurement.
We offer a full range of portable or fixed flowmeters backed by 30 years’ expertise and
experience using Ultrasonic techniques:
UF 801-P family, high features portable flow meters, with integral loggers,
signal analysis functions and many options.
UF 8xx families of fixed flow meters, applications include
L - Liquids,
G - Gas,
MC - Multichord applications for Liquid and Gas measurement,
CO / RV - Open Channel and River Flow Measurements.
The MiniSonic family with:
P
– Portable Metering
600/2000 single-channel fixed flowmeters,
600-2 and 2000-2 for dual-chord flow metering,
600-B and 2000-B for dual-pipe flow measurement configurations,
Speed (1 or 2) is for open channel flow velocity measurements.
This manual is specifically concerned with an element from the family and has been
drafted to guide you in the stages of installation and commissioning.
Other documents and tools are available on paper or in electronic format:
A training manual concerning ultrasound measurement, reference NT 122
A guide about the use of our software in the Windows environment reference
NT 204A GB1
The RS communication protocol with its addresses table NT 207A GB1
The PC software, specific to your application, Ref LS 600W _version *** , with
its delivered interconnection cable to a PC.
All our equipments work on the principle of ultrasonic transit time difference and can be
associated with clamp-on or wetted probes depending on the application.
NT 208D GB1
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SUMMARY:
1
– Typical Applications:
Installation with intrusive (Wetted) probes on two parallel chords.
Installation with clamp on probes on crossed diametric planes.
2
– Composition of a measurement point.
Certifications
Applicable standards
MiniSonic limitations
3
– Ergonomics and dimensions
Wall mounted industrial Version.
Ex d ATEX Version.
4
– Wiring diagram.
5
– Converter Assembling Instructions.
Mechanical installation.
Electrical wiring.
6
– Probes installation.
7
– Setting and commissioning.
8
– Detailed Menu layout:
Measurement Display Menu
Calibration Allowed Menu
Pipe Settings Menu
Q Settings Menu
– Flow and Fluid
Probe and Echo Menu.
General Parameters Menu
Zero / Auto-Zero Menu.
Current Output Menu
Factory Settings Menu.
Input / Output Test Menu.
Echo Analysis Menu.
9
– Recommendations – Final checks and tests
10 - Investigations
– Spare parts.
11
– Appendix.
NT 208D GB1
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D. s1 ou s2
L
d a
x
d
1 -
TYPICAL APPLICATIONS
Compared to a single-chord version, the management of 2 chords placed correctly on
the same pipe provides better monitoring for the hydraulic conditions specific to the site
and are the key to better accuracy.
There are two main possible acquisition configurations:
Two parallel and symmetrical chords with intrusive or wetted probes (SM)
aligned in pairs:
Either with tapping at an oblique angle and straight-ended probes
Or with taps perpendicular to the pipe, but with bevel-end probes.
Good geometrical control is essential. The construction of a measuring spool may be
recommended.
Main advantages of this configuration:
good control of turbulent / laminar flow configuration transitions,
improved measurement precision over a larger flow range,
when a spool is used , there is the possibility of calibration on a flow rig.
Two cross-path diametrical planes with clamp on external probes (SE).
The installation will be in Direct or Reflex mode depending on the options and
conditions on site.
NT 208D GB1
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2 - COMPOSITION OF A MEASUREMENT POINT
- The probes (x4) are arranged two per chord
- Integral or optional supports (SU)
- Coupling kits for external probes
- Probe / converter link cables
- The converter associated with its accessories (software, PC cable)
- If required, accessory modules: power supply transformer, Zener barriers
CERTIFICATIONS
All equipment is CE certified.
ATEX certification for the relevant equipment and standards when this quality is
required accepted and documented. All equipment will be labeled accordingly.
IP Rated as shown on each item.
The IP 67 or 65 rating of a MiniSonic is only complied with if assembly is according to
the manual.
APPLICABLE STANDARDS:
Concerning high voltage human safety risks: N/A
– Only low voltage ( < 60 V ) .
Concerning EMC : EN 61000 , EN 55022 et EN 50204
Concerning tightness ( IP ) : EN 60529
Concerning ATEX : Directive 94 / 4 / CE
+ EN 60079-0: General rules.
+ EN 60079-1 : Ex d enclosures.
+ EN 60079-7 : Ex e protection for connections.
+ EN 60079-18 : Ex mb x
– protection by encapsulation.
+ EN 60079-11 : Ex ia - Intrinsic safety
+ EN 60079-25 to guide you for your I.S. systems
Beware to take in account the energised lightings (from thunderstorms for
instance) and to place adapted modules when this risk can exist.
MINISONIC LIMITATIONS:
MiniSonic 600-2 is designed for pipes from 10 up to 630 mm Outside Diameter.
MiniSonic 2000-2 is designed for pipes up to 3300 mm O.D.
The maximum length between transducers (L) is 1250 mm for version 600-2
and 6600 mm for version 2000-2 .
The maximum axial distances are respectively 850 and 4400 mm.
The flow range is adjustable up to 99999.9 with every possible unit (l/h to m
3
/ s).
NT 208D GB1
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270
237
210
108
79
3 -
ERGONOMICS AND DIMENSIONS OF THE MINI 600 / 2000-2 CONVERTERS
Wall-mounted industrial version (IP 65 or 67):
The resources for cabling the 4 cables leading to the probes are provided by the
installation of double glands on a “Y” type with IP 65 protection level.
To preserve the MiniSonic index 67, an external extension box is necessary (optional
supply). (
Possibility also of a 316L St. St. enclosure with 4 glands for probes cables
).
F = Function
▼ = Choice (menu ou parameter)
+/- = Modification
N.B
.:
To facilitate the wiring on the probe cable, it is advisable to remove the “Y” box.
Version EXD ATEX (Ex d IIC T6 )
– IP 67 :
> See also the specific notice NT 219 B.
-.Each touch of the keypad has the same function as above.
- The two glands near the front are reserved for probe cables.
- These connections request the use of a double twin-ax from the MiniSonic to an Ex e or
Ex d connection box from where start the 4 cables to the probes.
- To do the internal wiring on MiniSonic, it is necessary to remove the front of the
MiniSonic board with its support. Remove the 3 screws which fix the front panel.
- The EMC is improved when cable screens or shields are earthed to the enclosure inside
the glands.
- After the internal connections are finished, earth the MiniSonic board support with the
green / yellow cable at the rear.
- The Enclosure itself must be earthed.
Weight =1.5 kg
Mat. = Alum.
Paint. = Epoxy
Fixing by 2 collars
on pipe
Fixing by 2 x
M5 Screws.
NT 208D GB1
7 / 20
100 mm
130
185
15
15
55
185 mm
RX 232
TX 232
- I s
1
+ I s
2
- I s
2
+ I s
1
V < 100 v
I < 0,1 A
P < 2 W
RS
+/-
-/+
12
I 2
13
14
MK4
TX 232
RX 232
Re1
I 1
Re2
Masse
BR5
1
2
+
-
1
2
3
4
6
7
8
9
10
11
5
2
1
1
2
3
4
5
6
RTX - 485
RTX + 485
BR2
BR1
SW
1 2 3 4
B R
3
B R
4
PT-GND1
PT-GND2
5
4
3
2
1
6
PT3
PT1
PT2
PT4
1
2
3
4
5
6
2
3
4
5
6
1
M
-
+
M
-
+
+
-
-
+
M
M
* Wiring for active output
+ I
S2
+ I
S1
- I
S1
- I
S2
BR2
2
11
10
9
8
7
6
5
4
3
14
13
12
BR5
2
1
-
+
1
100 mm
4
– WIRING DIAGRAM FOR MINISONIC 600-2 & 2000-2 : (Low voltage supply)
(
See also NT 218 if the GP 01 / 90-230 V AC // 24 V DC if installed).
The internal cables must be kept as short as possible. The cable connections must use
the adjacent gland.
For the Ex d version, the board is inverted (access is from underneath).
The removable connectors are useful for wiring and maintenance purposes
Note: 1 & 2 on BR5 can be inverted
to have (-) as the common
RS
Details
Cables preparation (to probes)
EEx d version
Pipe N° 2
- Upstream :1,2,3
- Downstream
Pipe N° 1
- Upstream :1,2,3
- Downstream
NT 208D GB1
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5
- CONVERTER ASSEMBLY
Mechanical fittings
Use a location that offers preferential conditions for easy access and vision.
Avoid mounting on supports exposed to vibration.
Avoid extreme weather conditions and direct exposure to the sun.
Wall fitting is done by two M5 screws for industrial enclosures, or by using our
support and fixing on a 2 ‘’ vertical tube with our Ex d version .
Electrical connections
: Refer to the diagram on the previous page.
Power supply: Connectors BR 1
– Use flexible cables with section 0.5 to 1.5 mm2.
- The recommended source is DC, 10 to 30 Volts (60 V on option): 12 / 24 (48).
- Any polarity will do. The required power is less than 2 Watt.
The source may also be A.C. (9 to 18 Volts
– 50/60 Hz) via a transformer on the
mains. The other and best solution is to order MiniSonic with GP01 module.
RS 232 or 485 digital outputs: BR 2 A, terminals 1 to 6.
- Cable PC-DB9 uses RS 232 with Tx on 2, Rx on 3 and 0 Volt on 5.
-
For a permanent link (logic controller, modem … ) :
. For RS 485: connect Rx
– to terminal 3 and Tx + to terminal 4
. For RS 232: connect Tx to terminal 1 and Rx to terminal 2 with common to 5 .
. No need of any other connection to validate RS 232.
. Connect terminals 5 to 6 to validate RS 485.
- On/Off outputs - Relays (Static): BR 2B, terminals 7 to 10
– multi-pair cables
- Comply with the limits V < 100 V; I < 0.1 A; R
ON
= 10 Ohm.
- Each relay Re 1 (terminals 7 & 8) or Re 2 (terminals 9 & 10) will transmit the chosen
status information in the “General Parameters” menu.
4
– 20 mA analog outputs: BR 2B, terminals 11 to 14 – Multi-pair cables.
- These are independent outputs
galvanically insulated
in respect to each other, but
also with respect to the other MiniSonic circuits and by default are
passive
and need
to be connected to a receiver supplying the power (30 V max.) to allow a load of
more than 1 k ohm.
- Output No. 1 (terminals 11 & 12) and output No. 2 (13 & 14) will transmit magnitudes
and ranges of variation as chosen in the “General Settings” menu: flow rate but also
speed of sound, gain, etc.…
- It is possible to carry out internal wiring to allow
active
outputs by associating the
terminal block BR 5 (see diagram) already linked to power supply voltage connected
to BR1, but with the drawback of losing part of the galvanic insulation.
! With a 12
V DC or AC supply, R “loop” is limited to 150 or 200 Ohms.
Attention! If this R loop is too high for the supply, the curent fall down to 4 mA
Connection to probes: BR 4 (chord 1) & BR 3 (chord 2).
- Use Twin-ax cables specified by Ultraflux (ET1217 & ET1217A).
-
In the industrial version, shield and conductors are separated in the “Y” compartment
of the Y gland, while leaving a free length of 10 cm to terminal blocks.
- In the Ex d version, the shields are stopped and connected in the stuffing boxes and
the conductors will be approximately 15 cm long up to the terminal blocks.
NT 208D GB1
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D
L
6
– PROBES INSTALLATION
– (General Procedures).
Unless specified and instructed otherwise in the order, refer to the probe data sheet
of the model used.
A dual-chord spool must always be constructed according to our guide drawing. Once
the structure has been made, verify the sizes “D
int
, L
1
& L
2
, D
1
& D
2
, d
1
& d
2
” as
built
Enter the results onto a sheet which will be used during the parameter adjustment.
! The final accuracy of the measurement depends on it.
The installation of the probes in a conduit should allow for the best the straight
lengths, particularly upstream, but also downstream, in order to benefit from a
predictable and stabilized hydraulic profile. Provide upstream a minimum of 15 times
the pipe diameter.
Similarly, to avoid the nuisance of deposits or accumulation of gas, planes close to
vertical (+/- 30°) will be avoided. A horizontal plane is a good choice excepted when
the conduit is vertical.
For intrusive probes, adjust the insertion then the alignment or orientation of the
probes for the same pair (> parallel faces).
For external probes, the freedom offered should not prompt the user to ignore
the above rules.
However, the choice of direct (\), reflex (V) or even (N or W) installation mode will
depend on the decision regarding the conduit (state) and the fluids to be measured.
Therefore, we advise initially a provisional installation known as a validation
installation (coupled with gel or grease) and final assembly (supports, solid coupling)
once the conditions have been validated.
Since the MiniSonic calculates for you the distance required between the probes, the
setting up operations will, in theory, take place once the converter parameters have
been set
Particular attention will be paid to cleaning the conduit at the probe location.
D.S.
D
L
NT 208D GB1
10 / 20
7 - COMMISSIONING AND PARAMETERING OF MINISONIC 600-2 / 2000-2
1. Once the cabling has been carried out and verified, power up the system:
The MiniSonic must display its delivered configuration screens:
- Hardware version = MiniSonic 600-2 or 2000-
2 and P.C. Board (MK4_M…)
- Software version = 18.10-01 (e.g.
– make a note of the first figure)
- Serial number = see if it is identical to the company nameplate
- Technical information: parameterized probes
Then it automatically switches to the measurement function (Q = …)
Check the consistency of these messages with respect to your application.
If the converter has been delivered pre-parameterized, startup can stop there.
However, it is recommended you check and, if necessary, to optimize the
adjustments, taking into consideration the exact dimensions and, if possible, zero
flow conditions (see the “Self-zero Adjustment” menu).
2. Parameter settings using the PC software
Refer to the manual supplied with the software (CD-ROM) .
The fields of the main values to be entered are listed below under Heading
8
.
The software offers extended configuration possibilities.
At the end of the manual, a printout of a typical file is given.
3. Parameter settings using the keyboard
Successive pressing on the
“F”
key, or
“F”
then
“
+
”
or
“
-
”
gives access from the
“Measurements Display” menu to the titles of the different menus :
Access (Authorization) to Adjustments
Pipe parameters
Flow rate / Fluid parameters
Probe parameters
General parameters including Outlets
Zero adjustment
Tests
Optionally: “Current outputs setting” and “Factory Adjustments”.
To enter the Menu, use the
∇
key in the same way as to move to the next field to be
filled in .
To modify (text or values), use
-
or
+
Exit from the menu is by the
F
key with return to the “Measurement Display” menu
If there is no action on the keypad for 1 mn, the MiniSonic automatically returns to
“Measurement Display” menu
.
When inside a menu, the browser only scrolls forwards. When necessary, do a
complete scroll..
NT 208D GB1
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8
– DETAILED REVIEW OF MENUS – MiniSonic Versions 600-2 and 2000-2
8 -1 :
“ Measurement Display ” menu:
Every time you return to this menu, MiniSonic displays :
chosen probes and inter-probe distance D.S.( if S.E. )
Then Flow rate (or other choice as first screen)
and associated messages .
∇
Gains 1 & 2 (mode and value )
and channel 1&2 quality indicator.
If I.Q. is less than 33 % , the last
Measurement cycle is rejected.
∇
Velocity of fluid and speed of sound
on channels 1 & 2
and also averaged values
∇
Physical measurements: time of flight T
and difference dT channels 1 & 2
∇
Totalizers
(Reset possible by simultaneously
pressing + and - )
∇
Date and time
Change by PC + Software
∇
Hydraulic Information
Calculated K
H
and Reynolds number
∇
Return to menu header
∇
Display of Flow rate and messages:
Probe = SE xxxx
D.S. = xxxx mm
Gain 2 (ESC) = xx dB
I.Q.2 = 98 %
V
1
= x.xxx m/s
s.sound 1 = xxxx.x m/s
T
1
= xxx.x
μ
s
dT
1
= ns
t
1
= xxxx m
3
t
2
= xxxx m
3
06/02/2003
15 : 46 : 22
Gain 1 (ESC) = xx dB
I.Q.1 = 100 %
T
2
= xxx.x
μ
s
dT
2
= ns
KH (AUTO )= 1. 055
Rey = 3,1E5
Probe = SE xxxx
D.S. = xxx mm
Q = xxx.x
Seek Echo / Fault Q if no echo
Q = xxx.xx m3/h
Seek Echo , Fault Q
V
2
= x.xxx m/s
s.sound 2= xxxx.x m/s
NT 208D GB1
12 / 20
8-2
: « Calibration Allowed »
Menu :
Access = press
F
once from the Measurement Display menu
If the display is:
Enter this code (1 to 65535)
If the display does not request
“Code?” there is none (code = 0).
Press
∇
Enter a code:
! This code will become active after de-energizing.
Remember to make a note of it. It will be required for any subsequent
intervention.
In case of loss, contact Ultraflux giving the following information: the serial number of
your MiniSonic MK4*/xx/xx/xxxx as it appears during energizing and the date or dates
on which you want action to take place. An operation will be requested allowing a
provisional code to be calculated.
A second press on
∇
will provide access to the existing Languages choice field.
8-3 : « Pipe Settings » menu :
Access = Press twice on
F
or
F
once, then
+
, and Enter by
∇
(Operations are common to all the menus).
∇
Outside diameter (mm)
or pipe circumference .
∇
Chosen pipe material
from programmed list :
If Other: Characterization of this material by its velocity or CM
This selection will resolve new or special cases and also optimize the
parameters for composite pipes having several materials (steel or cast iron +
cement) .
∇
Total pipe thickness:
∇
If Other:
ext D = xxxx.x
ext C = xxxx.x
Pipe =
STEEL , PVC ,OTHER ...
Thickness = xx.x mm
CM = xxxx m/s
Calibration Allowed : 0
Code ?
Access
Code = xxxx
NT 208D GB1
13 / 20
8-4 : « Q Settings » menu ( Flow / Fluid )
∇
Choice of Flow unit:
( l/h …tot … m3/s );
∇
Scale (graphics on PC only) :
Outputs: see menu « General »
∇
Product (+ / -) :
If WATER: C = 1300 to 1600 m/s
If OTHER:
∇
Fluid Characteristic
and speed of sound range :
∇
Hydraulic corrections (+ / -)
N.B.: they concern only S.E. probes
Prefer mode AUTO.
∇
Entry of Coefficient K
H
or following
data to do its calculation
:
If MANUAL: entry of coefficient
depending on profile : Laminar = 1.333
or Turbulent = 1.02 to1.08
If AUTO: entry of parameters:
∇
Fluid viscosity:
∇
Pipe roughness:
As well as the critical Turbulent /
Laminar flow transition:
∇
Critical Reynolds Number (Rey C)
∇
Transition range (LBR):
(
Recommended values)
Q unit = m
3
/h
Qmax (unit)
+/xxxxx.x
Product =
WATER / OTHER
Viscosity (cst)
x.x
Delta C = xxx m/s
Co = xxxx m/s
K Hydro =
AUTO / MANUEL
K Hydro = 1.xxx
Roughness ( m m)
xx.xx
LBR = 3
Rey C = 2800
NT 208D GB1
14 / 20
8-5 : « Probe / Echo parameter settings » menu :
∇
For two chords:
∇
Choice of probe:
Same choice for the 2 chords
∇
If SE (External probes)
/
= single traverse
V
= reflex mode
N , W
= 3 or 4 paths
If SM (wetted internal probes)
See parameters L , D , Cv
∇
Management of amplification gains:
ESC Mode recommended.
(ESC = Echo Shape Control)
Otherwise :
If
MANUAL
:
(Gain adjustment.)
If
AUTO
: Margin
(Over-amplification compared to
critical gain Go. )
∇
If SM choice: position of probes depending
on geometrical measurements .
as distance between probes , face
to face , per chord ( L )
∇
as projected distance onto flow axis
(Part of L concerned with the flow)
∇
Calculation weighting
(As per probes position)
Rugosité (mm)
*.**
Nb. Of Chords
2
Gain 2 = ESC
Margin. 1 & 2 = xx dB
Length 1 & 2 = xxx.x mm
Probe mounting = V
( ou / , N , W )
Gains 1 & 2 = xx dB
Gain 1 = ESC
Probe = SM xxxx
(or SE ou SP. A/B)
C.V. 1 & 2 = O.500
Ax. D 1 & 2 = xxx.x mm
NT 208D GB1
15 / 20
8-6 : « General Settings » menu
∇
Setting of LCD back-lighting
(Depending on MiniSonic version)
∇
Filter rate of measurements
(Number of 0.5 s cycles)
∇
Last accepted measure (IQ > 33%)
memorising time :
(Mode ESC : enter Mém. = > 20)
∇
Setting of Totalizers 1 & 2
Depending on flow direction:
∇
Depending on flow Q:
∇
depending on weight or unit :
(from 1 cl to 100 m3 )
∇
Setting of Relays 1 & 2
by assignment :
∇
If copy of TOT 1 or TOT 2 :
= relay closing time > F maxi
∇
If Threshold: enter value Q:
∇
Reset to Zero of TOT. t1 & t2
This function may be prohibited
∇
Parameter settings of two outputs
4-20 mA, SA 1 & SA 2
by assignment :
by range ( depending on unit )
∇
RS 232 ou 485 Communication
Jbus slave No and Baud Rate:
Back Light
ON / OFF / TIMED
Mémory (s)=
∗∗
Threshold R2 (unit)
Value
Reset t1 & t2
NO / YES
+ , - , +/-
Closed/Open /TOT.1 ou 2 /
Fault Q/ Dir.Q/ Threshold Q
Pulse width ( ms )
N. JBUS = 1
BAUD = 9600
Filter =
∗∗
SA 1/ SA2 Type
Q , V 1&2 , C 1&2 , Gain 1&2
4mA SA 1 & SA 2
+ / - xxxx.x
Pulse weight =
1 m3
20 mA SA 1 & SA 2
+ / - xxxx.x
Totalizer 1
Q
NT 208D GB1
16 / 20
8-7 : « Zero / Autozero Settings » menu
∇
Status display
Modification by
+ / -
:
no compensation ( reset ) :
performs the zero under actual
conditions ( flow must be null )
Exit by
F
! Caution
= to carry out Self-zeroing, the flow rate must be absolutely zero
while the display indicates
«
*
dTo 1 ou dTo 2*»
.
8-8 : « Output Current Settings» menu
( normally reserved to Ultraflux)
It permits adjustment of coefficients
to convert min / max range to 4 / 20mA
! Caution
: use an a approved instrument
to measure current (in mA, resolution <0.01).
8-9 : « Factory Settings » menu
(normally reserved to Ultraflux)
It permits to adjust a coefficient, which
optimises the compensation with
Clamp-on probes (value 0.6 to1.6)
Another parameter
named “ Delta T band ” permits to set a compromise between
filtering an response time for some difficult applications: please contact Ultraflux .
8-10 : « I / O Test » menu
: simulation on outputs and relays .
∇
Simulated current on SA 1 or SA 2 :
(action by
+ / - )
∇
Simulation of status on Re 1 or Re 2 :
(action by
+ / -
)
8-11 : « Echo Display » menu
∇
It put multiplexing off
This menu helps to observe echoes chord by chord .
Delta To 1 & 2 (ns)
= xx.xx ( ns )
RST Delta To 1 & 2
Autozero 1 & 2
Current 1 & 2 = xx.xx
mA
Relay 1 & 2 =
Open / Closed
Chord 1 & 2
4 mA ( 1 & 2 ) = xxxx
20mA ( 1 & 2 ) = xxxx
Correction S.E. = 1.0
NT 208D GB1
17 / 20
RECOMMENDATIONS
Each application has its priorities. Accordingly, the MiniSonic is particularly flexible
and can be adapted to extreme situations, meaning that many applications are possible.
Each value or text field is filled in by Ultraflux before the final tests and delivery.
Nevertheless, it is advisable to verify them by running through the various menus,
comparing them with files given at the time of order, or with your instructions or
particular choices.
More particularly, geometrical descriptions specific to the site and the choice of scale
are the responsibility of the end user.
During a run-
through of the various menus, it is advisable to fill in the “Probes /
Echoes” menu first, followed by those related to the Pipe and the Flow Rate / Fluid (Q)
to obtain a measurement to be transmitted according to the instructions entered into the
“General” menu
FINAL CHECKS AND TESTS
Once installation, connections and parameters have been set up, several possible
situations may arise:
Case 1
– The measurement displayed and transmitted meets your expectations.
Case 2
– The measurement operates but may lack accuracy or is unstable.
Case 3
– The measurement is not reliable or the MiniSonic is displaying a Fault.
Case 1
: Although everything appears to be OK ( Flow Rate = OK ), check the other
values:
The echo or gain level compared to typical values.
- For external probes, a gain exceeding 50/60 dB reveals certain difficulties such
as the wrong choice of probes, incomplete installation or coupling, rusted pipe,
absorbent fluid …
- For intrusive probes, the gain level is usually low (excepted for gas)
The ESC mode can decide a high gain margin. Take it in account in your
diagnosis.
The quality index Q.I. is normally close to 100 %.
By default, it indicates several perturbations = electrical interference, passage of
bubbles, highly charged fluid …
In this case, in-depth investigation is advisable (oscilloscope).
The displayed speed of sound should be close to that expected. It is an index of
good control of the geometry or application.
If the flow rate can be interrupted, check the Zero
If necessary, carry out adjustment using the Auto-Zero menus.
By PC and software, it is possible to set the measurement to Zero at very low flow
(cut-off = % of Q max).
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Case 2
: In addition to the points mentioned above, the possible causes are:
Poor control of the installed dimensions, or of the product characterisation or of the
Zero point :
Correct and reanalyse
An installation constructed with poor hydraulic conditions :
If possible, change the location of the probes or spool piece if possible.
Otherwise, for external probes, choose KHydro = Manual and adjust this
coefficient to obtain the expected flow rate reading.
Or, for internal probes, adjust the coefficients CV 1 & 2.
The range of speed of sound to be measured is too wide for the chosen setup :
With S.E. probes, a direct mode ( / ) may be preferable to a reflex mode ( V )
Have you correctly set Co and Delta C range?
An unstable fluid causing the ESC mode to restart too often:
try the AUTO mode with a reduced margin (
∼
12 dB)
The expected measurement requires greater precision :
The MiniSonic allows the input of a “Linearization” correction law.
Plot the error curve and use the software to enter the complementary law (Factory
Adjustments Menu).
The Delta t offered by the measurement conditions (Diameter, Flow Rate,
Assembly, and Choice of probes) is too low to claim any measurement accuracy.
Is it possible to revise these choices?
The measurement conditions reveal poor control of transitions from turbulent to
laminar configurations:
Revise the declared Reynolds Critical and range (LBR) values.
Case 3
: The MiniSonic does not operate:
There is no display or measurement transmission ( 4
– 20 mA ) .
Is the MiniSonic powered up? Check with a voltmeter.
Has it failed? If yes, the only solution is to call in our after-sales service.
If the MiniSonic displays INIT constantly, attempt a power cutoff, then re-energize.
If the fault persists, contact Ultraflux (Problem with the microprocessor).
If the fault disappears, it may come back and could be due to excessively high
impedance in the supply source.
If the MiniSonic displays “Flow Rate Fault”, this message does not mean that the
MiniSonic has failed, but that the ultrasound signals have not reached the expected
level or are outside the window [Co +/- Delta C]. There are several possibilities :
Pipe is empty?
Physical problem from site: Two-phase, highly charged or too viscous fluid?
Is pipe too old, which does not transmit ultrasonic signals?
Unsuitable installation mode = try Direct mode (\) or other sensors.
Incorrect sensor installation (orientation, coupling … ) .
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If the problems are encountered only on one channel, it is easy to swap both
channels and see if the issue is with the application or the MiniSonic.
10 - INVESTIGATIONS:
If there is a difficulty or a problem, logical analysis can be assisted by the
implementation of expert apparatus:
Either an oscilloscope: the MiniSonic has test points for the purpose:
From low to high referring to wiring diagram § 4:
PT 4 = Echo
– Alternating signal, peak to peak 4 Volt max., (-0.65 V negative
threshold voltage).
PT 0 = 0 Volt
– Ground
PT 2 = Synchro.
–Trig on Positive edge (0 to 5 Volt).
PT 1 = Selection windows .Echo must be inside.
PT 3 = Emission < > Reception transit time.
PT 0 = 0 Volt.
Or a MiniSonic P or a DigiSonic E / P or an UF 810-P portable flowmeter.
Or measuring instruments for dimensional or alignment measurements
SPARE PARTS
:
Ultraflux offers possibilities of purchasing spare cards or, as long as acceptance is
granted, the standard replacement of equipment in the event of failure.
Contact the Ultraflux commercial services or the regional dealer.
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11
– APPENDIX
Calibration file example with a MiniSonic 2000-2 on a flow spool with wetted
probes SM