Burkert 8041 User manual

Instruction Manual
8041
INSERTION MAGMETER
FOR HIGH TEMPERATURES
© Bürkert 2004 Subject to technical change without notice

INTRODUCTION
28041
ENGLISH
Table of Contents
1. INTRODUCTION ......................................................................................................... 3
1.1 Symbol used ..................................................................................................................... 3
1.2 General safety instructions ........................................................................................... 3
1.3 Description ....................................................................................................................... 4
1.4 Conversion of the flow velocity into a flow rate - Factor K ................................... 4
2. QUICK START ............................................................................................................. 6
3. CONFIGURATION ...................................................................................................... 8
3.1 General comments ......................................................................................................... 8
3.2 Defining the mains frequency .................................................................................... 11
3.3 Filtering level .................................................................................................................. 11
3.4 “Zero flow” point calibration ....................................................................................... 12
3.5 Measuring range selection or full scale teach-in .................................................. 13
3.5.1 Selection of a predefined measuring range ....................................................................13
3.5.2 Full scale teach-in ..................................................................................................................................14
3.6 Programming the relay output.................................................................................... 15
3.6.1 Switching mode of the relay output ........................................................................................16
3.6.2 Programming the low switching threshold ........................................................................18
3.6.3 Programming the high switching threshold......................................................................19
3.6.4 Programming the time-out before switching...................................................................20
4. INSTALLATION ......................................................................................................... 21
4.1 Installation guidelines ................................................................................................... 21
4.1.1 Pressure-Temperature diagram ..................................................................................................21
4.1.2 Mounting positions ................................................................................................................................22
4.2 Installation ....................................................................................................................... 24
4.3 General electrical connection ................................................................................... 24
4.4 Electrical wiring ............................................................................................................. 26
4.4.1 Connection of the 4-20 mA current output.....................................................................27
4.4.2 Connection of the frequency output ......................................................................................28
4.4.3 Connection of the relay output ...................................................................................................29
5. MAINTENANCE ........................................................................................................ 30
5.1 Error signalling ............................................................................................................... 30
5.2 Cleaning .......................................................................................................................... 31
6. TECHNICAL DATA.................................................................................................... 32
6.1 Process characteristics ............................................................................................... 32
6.2 Electrical characteristics ............................................................................................. 32
6.3 Safety ............................................................................................................................... 33
6.4 Environment .................................................................................................................... 33
6.5 Conformity with standards .......................................................................................... 33
6.6 Dimensions ..................................................................................................................... 34
6.7 Label description........................................................................................................... 34
7. ANNEX ....................................................................................................................... 35
7.1 Order codes ................................................................................................................... 35
7.1.1 Finished products ...................................................................................................................................35
7.1.2 Accessories and spare parts .........................................................................................................35
7.2 Flow charts ..................................................................................................................... 36
7.3 Connection examples .................................................................................................. 38

INTRODUCTION
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1.1 SYMBOL USED
Indicates information which must be followed. Failure to follow the
information could endanger the user and affect the function of the
device.
1.2 GENERAL SAFETY INSTRUCTIONS
Before installing or using this product, please read this manual and
any other relevant documentation to ensure you fully benefit from all
the advantages the product can offer.
- Please verify that the product is complete and free from any damage.
- It is the customer's responsibility to select an appropriate device for the
application, ensure the unit is installed correctly, and maintain all components.
- Always check the chemical compatibility of the materials the device is made of.
- This product should only be installed or repaired according to the standards and
rules in force in the country, by specialist staff using the correct tools.
- Please observe the relevant safety regulations throughout the operation,
maintenance and repair of the product.
- Always ensure that the power supply is switched off and the pipes / tank do
not contain any pressure before working on the device / system.
- If these instructions are ignored or the transmitter is not used according to the
specifications, no liability will be accepted and the guarantee on the device
and accessories will become invalid.
- This electronic device is sensitive to electrostatic discharge. To avoid any
damage by immediate electrostatic discharge, pay attention to the
requirements of EN 100 015-1.
- Always protect the device from electromagnetic perturbations, and when
installed outside, protect it from the rain and ultraviolet radiations.
Manufacturer’s address
Bürkert & Cie
Rue du Giessen
67220 TRIEMBACH-au-VAL
FRANCE

INTRODUCTION
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ENGLISH
1.3 DESCRIPTION
The 8041 is a magmeter measuring a flow velocity and made up of an electronic
module and a stainless steel sensor. It is fitted with a 4-20 mA current output, a pulse
rate output and a relay output.
The flow velocity is visualized by a 10-led bargraph located on the electronic board.
The following parameters can be programmed by means of 5 switches, a push-button
and a 10-led bargraph:
- “zero flow” point
- measuring full scale
- relay output parameters
- frequency delivered by the mains
- filtering of the flow velocity measurements
1.4 CONVERSION OF THE FLOW VELOCITY INTO A FLOW RATE -
FACTOR K
The 8041 measures the flow velocity (in m/s) of the medium and converts it into a
current (in mA) and a frequency rating (in Hz).
The current I or the frequency f are proportional to the flow rate Q (l/s); The
proportionality factor is called “factor K”:
f = K1.Q
I = K2.Q + 4
The following formulae make it possible to calculate the K factor which is necessary to
convert the flow velocity, i.e. current or frequency value, into a flow rate:
Kfitting = K factor of the fitting S020 (to be taken from the instruction manual of the S020
fitting: use the K factor of the S020 associated to a transmitter 8045
Full scale Factor K1Factor K2
10 m/s
K1
Kfitting
100
=
20
=
3 x
fitting K
K2
5 m/s
2 m/s
K1
Kfitting
200
=
40
=
3 x
fitting K
K2
K1
Kfitting
500
=
100
=
3 x
fitting K
K2

INTRODUCTION
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Example
Be a 8041 inserted into an S020, with DN50 and made of stainless steel:
Kfitting = 11,24
The selected full scale is 5 m/s.
The factor K1to be used for the conversion of the output frequency f into a flow rate Q
is:
K1= 200 = 17,79
11,24
The factor K1to be used for the conversion of the output current I into a flow rate Q is:
K2= 40 = 1,19
3x11,24

QUICK START
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ENGLISH
See 4.3
See 4.1 and 4.2
See 3.4
Contact your
Burkert agent
See 3.2
See 4.4
See 3.3
See 3.5
See 4.4
This Quick Start diagram shows the different installation and programming steps to be
carried out to ensure the good operation of the appliance.
Unpack the appliance
Order
code OK?
Unscrew the 4 screws
Select the mains frequency by means of switch 1
Select the current output type (sourcing or sinking)
Select the measuring range by
means of switches 4 and 5
Select the filtering level by
means of switches 2 and 3
Pass the cables through the cable glands
and connect them to the electronic board
No
Yes
Earth the shielding of the power supply
Install the magmeter on the pipe then power it
Calibrate the "zero flow" point

QUICK START
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See 3.6
See 3.1
See 3.5
See 5.1, Error
signalling
Has a
full scale
teach-in to be
performed?
Perform the full scale teach-in
Do the
10 leds of the
bargraph
light up?
Check if
actual flow
> 2 m/s and
< 10 m/s
Program the relay output
Check that the green led flashes once
Replace the cover in the proper orientation
(see photo) and screw the 4 screws
The appliance is ready for use
No
Yes
No
Yes
No
Yes

CONFIGURATION
88041
ENGLISH
123456
4...20 V+ V- PE Pls+Pls-
ON
123456
12345678910
3.1 GENERAL COMMENTS
The 8041 magmeter has 2 operating modes:
- the Readout mode: to visualize the measured flow velocity and the values
programmed for the relay operation.
- the Configuration mode: to calibrate the device (“zero flow” point and measuring full
scale) and program the relay parameters.
Configuration is done by means of accessible switches, push-button, leds and
bargraph on the electronic board after having unscrewed the 4 screws and removed
the cover of the magmeter.
Always replace the cover as indicated by the
photo opposite ; Screw the 4 screws in an
alternating pattern.
Push-button - Switches 1 to 5: to configure the flowmeter (mains
frequency, filtering level of the measurements, measuring
range)
- Switch 6: unused
10 led-bargraph:
to visualize and program
the flowmeter
parameters:
- 1 led lit =
10% of the full scale (or
10 seconds)
- in Readout mode:
led flashing x times = x%
of the full scale
(or x seconds)
in Configuration mode:
led flashing once = 1%
of the full scale
(or 1 second)
Green led
flashing once up to 5
times to know which
parameter the bargraph
is indicating
Red led:
- OFF: the sensor
is in the Readout mode
(measured velocity and
programmable
parameters)
- ON: the device
is in Configuration mode
(the parameters can be
programmed)
-
blinking once up to 5
times: error signalling
.....
.....

CONFIGURATION
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Example of a measured flo velocity visualized by the bargraph:
If the 0-10 m/s measuring range has been chosen, the following bargraph shows a measured flow velocity of 7.2 m/s
(7 leds lit and the 8th led flashing twice = 72% of the full scale)
Hold
> 2 s
Flow measurement
Relay switching mode *
Relay low switching threshold *
Hold
> 2 s
Relay high switching threshold *
Relay switching time-out *
Hold
> 2 s
Hold
> 2 s
Hold
> 2 s
Reading mode Configuration mode
* The device automatically goes back to the reading mode of the flow velocity measurement, if the push-button
is not pressed for 10 s.
Press briefly
Flowmeter calibration
Relay programming
Press briefly
Press briefly
Press briefly
Press briefly
Led off
Led lit
Led blinking
Push-button
Green led blinking
1 up to 5 times
Red led off
Red led lit
..... Bargraph
12345678910
0 100% FS

CONFIGURATION
10 8041
ENGLISH
Hold
> 2 sec
Measured flow velocity
Hysteresis mode
Window mode
Present switching
mode *
Validate the
displayed choice
Present low switching
threshold * Release when
the desired ten
is reached *
X
Push and hold
to program
the units
...then, the leds light up
one after the other
(ten increment)
Unit incrementation: Led
flashes up to 9 times...
Validate the
displayed value
Unit incrementation:
Led flashes
up to 9 times
alternately
Release when the
desired feature
is displayed *
X
"Zero flow" point calibration
Full scale teach-in
and
Validate the
displayed choice
alternately
Release when the
desired feature
is displayed *
X
and
Present high switching
threshold *
Present switching
time-out *
and
and
and
......
Release when
the desired unit
is reached *
X
repeat if necessary
* The device automatically goes back to the Reading mode of the measured flow velocity, using the previously programmed parameters, if the push-button is not pressed for 10 s.
Press briefly
Press briefly Press briefly Press briefly
Press briefly
Hold
> 2 sec
Hold
> 2 sec
Hold
> 2 sec
Calibration
in progress
Reading Calibration
Hold
> 2 sec
Hold
> 2 sec
Hold
> 2 sec
Hold
> 2 sec
Relay

CONFIGURATION
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3.2 DEFINING THE MAINS FREQUENCY
Switch 1 makes it possible to select the frequency delivered by the mains:
3.3 FILTERING LEVEL
Filtering allows the attenuation of fluctuations in the flow. The 8041 sensor can work
without or with filtering.
Switch 2 makes it possible to activate or inhibit filtering :
If filtering has been activated, two filtering levels, slow or fast, are available through
Switch 3:
Frequency of the power
supplied by the network Position of switch 1
50 Hz OFF
60 Hz ON
Flow filtering activation Position of switch 2
No OFF
Yes ON
Flow filtering Position of switch 3
slow (10-90% response time = 14 s) OFF
fast (10-90% response time = 5 s) ON

CONFIGURATION
12 8041
ENGLISH
t (s)
t (s)
t (s)
Flo rate smoothed using fast
filtering
Actual flo
- Slow filtering allows the smoothing out of strong variations in the flow (for example,
fluid containing air bubbles)
- Fast filtering allows the smoothing out of weak variations in the flow.
Flo rate smoothed using
slo filtering
Bargraph status
3.4 ZERO FLOW POINT CALIBRATION
Before using the sensor for the first time, its “zero flow”
point must be calibrated.
- Fill the pipe with the fluid and then stop the flow.
- It is essential that the sensor be left in the fluid for
24 hours
- Ensure that there are no air bubbles in the pipe and
that the fluid is immobile
- Check whether the green led flashes once and the red
led is off (Readout mode). If not, refer to § 3.1
- Press and hold the push-button: after 2 seconds,
the red led lights up (Configuration mode) and the
bargraph shows the features “zero flow point
calibration” and “full scale calibration” alternately.
12345678910
“zero flow” point calibration
Full scale calibration

CONFIGURATION
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- Release the push-button when the “zero flow” point
calibration feature is displayed, then you may:
➨either press the push-button briefly to validate the
displayed feature. The magmeter is automatically
calibrated.
At the end of calibration, the red led goes off: the
magmeter has automatically returned to the flow
velocity Readout mode.
➨or press and hold the push-button to display
another feature.
➨or wait for 10 s to return to the measured flow
velocity Readout mode, without validating the
displayed feature.
If the red led flashes twice rapidly, the zero
flow point could not be calibrated: press the
push-button briefly. The sensor returns to
the measured flow velocity Readout mode
and uses the zero flow point of the previous
calibration.
“zero flow” point calibration
Bargraph status
12345678910
Calibration in progress
3.5 MEASURING RANGE SELECTION OR FULL SCALE TEACH-IN
3.5.1 Selection of a predefined measuring range
The output signal is proportional to the measured flow velocity. The measuring range
may be adapted to the application by means of switches 4 and 5:
When selecting a new measuring range, the percentages programmed for the low and
high thresholds apply to the new selected full scale.
Switch 4 Switch 5
0 to 2 m/s ON OFF
0 to 5 m/s OFF ON
0 to 10 m/s OFF OFF
0 to full scale (between 2 and
10 m/s) determined by teach-in ON ON
Position of switches 4 and 5
Measuring range

CONFIGURATION
14 8041
ENGLISH
3.5.2 Full scale teach-in
The following curves show the ratio between the fluid velocity measured and the
frequency or current value delivered by the output:
Measuring range error
22
mA
0m/s
0.1
20
4
256
Hz
0m/s
0.1
240
Full scale + 20% Full scale + 20%
Teach-in full scale Teach-in full scale
Bargraph status
12345678910
“zero flow” point calibration
Full scale calibration
If no predefined measuring range is suited to your
application, the 8041 sensor can be programmed with
the actual max. flow velocity of the application.
The minimal value of the measuring range is 0 m/s.
- Set both switches 4 and 5 to ON
- Install the 8041 sensor into the pipe (see chapter
Installation)
- Let the max. flow flow through the pipe
- Check whether the green led flashes once and the red
led is off (Readout mode). If not, refer to § 3.1
- Press and hold the push-button: after 2 seconds,
the red led lights up (Configuration mode) and the
bargraph shows the features “zero flow point
calibration” and “full scale calibration” alternately.
Frequency output Current output

CONFIGURATION
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- Release the push-button when the “full scale
calibration” feature is displayed, then you may:
➨either press the push-button briefly to validate the
displayed feature. The magmeter is automatically
calibrated.
At the end of calibration, the red led goes off: the
magmeter has automatically returned to the flow
velocity Readout mode.
The teach-in full scale is saved by the electronics:
it is used by the magmeter as soon as switches 4
and 5 are set to ON.
➨or press and hold the push-button to display
another feature.
➨or wait for 10 s to return to the measured flow
velocity Readout mode, without validating the
displayed feature.
If the red led flashes 4 resp. 5 times rapidly,
the actual max. fluid velocity is resp. < 2 m/s
or > 10 m/s. Press the push-button briefly:
the sensor returns to flow velocity
measurement using the full scale of the
previous calibration.
Full scale calibration
Bargraph status
12345678910
0 100% FS
Calibration in progress
3.6 PROGRAMMING THE RELAY OUTPUT
The user can program the following parameters for the operation of the sensor relay
output:
- The switching mode, either window or hysteresis
- The low switching threshold, in a percentage of the full scale
- The high switching threshold, in a percentage of the full scale
- The time-out before switching, from 0 to 100 s.
Whether the relay operating is Normally Open or Normally Closed is
determined by the connection of the relay to the terminals of the
electronic board.

CONFIGURATION
16 8041
ENGLISH
Low threshold High threshold Low threshold High threshold
Window mode (NO-wired realy) Window mode (NC-wired relay)
2 s 2 s 2 s
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
RELAY OUTPUT
t
m/s
Low threshold
High threshold
Window mode
NO-wired relay
Hysteresis mode
NC-wired relay
NO-wired relay
NC-wired relay
NO-wired relay
NC-wired relay
NO-wired relay
NC-wired relay
Switching time-out = 0 s
Switching time-out = 2 s
Switching time-out = 0 s
Switching time-out = 2 s
The following diagram shows switching examples of the relay output depending on the
different possible parameter settings and the flow velocity:
3.6.1 Switching mode of the relay output
The switching mode of the relay output can be chosen among 2 modes, either window
or hysteresis.
- Window mode: the change of state of the relay output (OUT) occurs at any threshold
detection:
m/s
OFF
ON
Relay output
m/s
OFF
ON
Relay output

CONFIGURATION
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- Hysteresis mode: the change of state of the relay output (OUT) occurs at high
threshold detection by increasing flow velocity and at low threshold detection by
decreasing flow velocity:
Low threshold High threshold Low threshold High threshold
Hysteresis mode (NO-wired realy) Hysteresis mode (NC-wired relay)
Present measured flow velocity
To change the relay switching mode, do as follows:
- The green led flashes once and the red led is off
(Readout mode). If not, refer to § 3.1
- Press the push-button once briefly: the green led
flashes twice and the bargraph shows the present
switching mode.
- Press and hold the push-button: after 2 seconds,
the red led lights up (Configuration mode) and the
bargraph shows the features “Hysteresis mode” and
“Window mode” alternately.
- Release the push-button when the desired switching
mode is displayed, then you may:
➨either press the push-button briefly to validate the
displayed feature and automatically return to the
flow velocity Readout mode.
➨or press and hold the push-button to display
another feature.
➨or wait for 10 s to return to the measured flow
velocity Readout mode, without validating the
displayed feature.
Bargraph status
Present switching mode
(Hysteresis mode, by default)
m/s
OFF
ON
Relay output
12345678910
12345678910
Window mode
Hysteresis mode
12345678910
0 100% FS
m/s
OFF
ON
Relay output

CONFIGURATION
18 8041
ENGLISH
3.6.2 Programming the low switching threshold
The low switching threshold can be programmed within a
range between 0 and the high switching threshold
- The green led flashes once and the red led is off
(Readout mode). If not, refer to § 3.1
- Press the push-button twice briefly: the green led
flashes three times and the bargraph shows the
present low threshold (in % of the full scale)
- Press and hold the push-button: after 2 seconds,
the red led lights up (Configuration mode) and led N°1
of the bargraph flashes 9 times (1 flash = 1% of the full
scale) then it lights up;
The next leds then light up one after the other up to the
high threshold;
Release the push-button when the desired number of
leds is lit (1 led lit = 10% of the full scale).
Press and hold the push-button again: after 2 seconds,
the next led flashes (1 flash = 1% of the full scale).
Release the push-button when the led has flashed the
desired times.
- If necessary, press and hold the push-button again to
change the displayed value.
- Press the push-button briefly to validate the value
visualized by the bargraph and automatically return to
the flow velocity Readout mode or wait for 10 s to
return to the flow velocity Readout mode without
validating the displayed value.
2 Leds lit = 20% of the full scale
3rd Led flashing 4 times = 4% of
the full scale
The bargraph shows 24% of the full
scale, ie. by a 0-10 m/s measuring
range, this corresponds to a low
threshold of 2.4 m/s
Present measured flow velocity
Bargraph status
Present low threshold
(full scale by default)
12345678910
0 100% FS
12345678910
0 100% FS
12345678910
0 100% FS
12345678910
0 100% FS
12345678910
0 100% FS
12345678910
0 100% FS

CONFIGURATION
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3.6.3 Programming the high switching threshold
The high switching threshold can be programmed within
a range between the low switching threshold value and
100% of the full scale.
- The green led flashes once and the red led is off
(Readout mode). If not, refer to § 3.1
- Press the push-button 3 times briefly: the green led
flashes four times and the bargraph shows the
present high threshold (in % of the full scale)
- Press and hold the push-button: after 2 seconds,
the red led lights up (Configuration mode) and the first
bargraph led following the low threshold value flashes
9 times (1 flash = 1% of the full scale) then it lights up;
The next leds then light up one after the other up to
100%;
Release the push-button when the desired number of
leds is lit (1 led lit = 10% of the full scale).
Press and hold the push-button again: after 2 seconds,
the next led flashes (1 flash = 1% of the full scale).
Release the push-button when the led has flashed the
desired times.
- If necessary, press and hold the push-button again to
change the displayed value.
- Press the push-button briefly to validate the value
visualized by the bargraph and automatically return to
the flow velocity Readout mode or wait for 10 s to
return to the flow velocity Readout mode without
validating the displayed value.
8 leds lit = 80% of the full scale
9th Led flashing twice = 2% of the
full scale
The bargraph shows 82% of the full
scale, i.e. by a 0-10 m/s measuring
range, this corresponds to a high
threshold of 8.2 m/s
Bargraph status
Present measured flow velocity
Present high threshold
(full scale by default)
12345678910
0 100% FS
12345678910
0 100% FS
12345678910
0 100% FS
12345678910
0 100% FS
12345678910
0 100% FS
12345678910
0 100% FS

CONFIGURATION
20 8041
ENGLISH
3.6.4 Programming the time-out before switching
If need be the switching threshold of the relay output can
be timed-out (from 0 up to 100 seconds), i.e. the
switching only occurs when either threshold is exceeded
for a duration higher than the time-out.
A time-out set to 0 means that the switching occurs
immediately.
To set the time-out, do as follows:
- The green led flashes once and the red led is off
(Readout mode). If not, refer to § 3.1
- Press the push-button four times briefly: the green led
flashes five times and the bargraph shows the present
time-out (in seconds).
- Press the push-button and hold: After 2 seconds the
red led lights up (Configuration mode) and led N°1 of
the bargraph flashes 9 times (1 flash = 1 s) then it
lights up;
The next leds then light up one after the other;
Release the push-button when the desired number of
leds is lit (1 led lit = 10 s).
Press and hold the push-button again: After 2 seconds
the next led flashes (1 flash = 1 s).
Release the push-button when the desired flashing is
reached.
- If necessary, press and hold the push-button again to
change the displayed value.
- Press the push-button briefly to validate the value
visualized by the bargraph and automatically return to
the flow velocity Readout mode or wait for 10 s to
return to the flow velocity Readout mode without
validating the displayed value.
5 leds lit = 50 sec
6th led flashing 2 times = 2 seconds
The bargraph shows a time-out of
52 seconds
0 s 100 s
12345678910
Present measured flow velocity
Present switching time-out
(100 sec, by default)
0 sec 100 sec
12345678910
Bargraph status
0 s 100 s
12345678910
0 s 100 s
12345678910
0 s 100 s
12345678910
12345678910
0 100% FS