128541 16.10.2017 EN
Operating instructions
BLM-SF-FM
EN
BLM-SF-FM
Manufacturer contact
Sales contact
KSR Kuebler Niveau-Messtechnik AG
Heinrich-Kuebler-Platz 1
69439 Zwingenberg am Neckar • Germany
Phone. +49 6263/87-0
Fax +49 6263/87-99
info@ksr-kuebler.com
www.ksr-kuebler.com
WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg • Germany
Phone. +49 9372 132-0
Fax +49 9372 132-406
info@wika.de
www.wika.de
GAYESCO-WIKA USA, L.P.
229 Beltway Green Boulevard
Pasadena, TX 77503
Phone. +1 713 475-0
Fax +1 713 475 0011
info@wika.com
www.wika.us
© 2016 WIKA Alexander Wiegand SE & Co. KG
All rights reserved
WIKA® and KSR® are registered trademarks in various countries.
Prior to starting any work, read the operating instructions!
Keep for later use!
Zum späteren Gebrauch aufbewahren!
2 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
1. Field of application 4
2. Construction 6
3. Commissioning 7
4. Operating instructions 11
5. Analog output 29
6. Version history 30
7. Support in case of failures 31
8. Service and repair 33
9. Liability 34
10. Dismounting, return and disposal 35
Contents
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 3
1. Field of application
The float level sensors BLM-SF-FM are very precise, float controlled level
sensors for continuous detection of liquid levels. The sensor BLM-SF-FM
is designed for bypass applications.
Features:
• sensor pipe hermetically sealed against medium
• free of wear and tear
• magnetic detection of liquid level
• insensitive against vibrations and minor shocks
• sensor head insensitive against pollution (IP67)
• high precision
• high resolution
• fast detection of level changes
• measured values are available fast after external voltage drops
• liquid level measured direct and linear
• recalculation of liquid level into fill volume of a given tank
The internal sensor itself is protected by a robust metal pipe. Therefore,
the system is perfectly suited for application in aggressive and toxic environments and in the food and beverage industry, too.
As output, an analogue (4-20 mA) current signal is generated proportionally to the liquid level. This signal can be used as input for transducer and
display devices. The digital HART®- interface makes it possible to operate
multiple transmitters on a single supply loop (multidrop).
4 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
Magnetostrictive wire
Magnetic field
Torsion impulse
Circular magnetic field
Torsion impulse
Magnet
1.1 Principle of operation
Inside the sensor’s pipe, a wire of magnetostrictive material is placed.
Periodically, a current impulse is sent through the wire, which in turn creates a circular magnetic field around the wire. This pulse starts a time
measurement. For the level transmission, a magnet mounted inside the
float is used. The magnetic field magnetizes the wire in this area.
By superposition of the two magnetic fields in the region of the float, a
mechanical torsion wave through the wire is created, which travels with the
material specific speed of sound in both directions (Wiedemann effect).
The torsion sound wave, running in direction of the sensor’s end is
reflected there. The sound wave running in direction of the detector is
transformed into an electric signal and the elapsed time is measured.
Liquid and interface level are calculated and transmitted through the sensor’s interface.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 5
Level measurement on a
magnetically operated liquid level
gauge, sensor head downwards.
Level measurement on a
magnetically operated liquid level
gauge, sensor head upwards.
2. Construction
2.1 Type BLM-SF-FM
6 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
Caution application conditions
Before proceeding with the installation, the customer has
to check whether the ordered application conditions
currently apply and if the sensor is suitable for the
given application. This regards to the features temperature, medium and eventually additional constraints.
Caution mounting
The sensor should be mounted with greatest caution. The
customer has to care for suitable selection of sealingdimensions and materials. The necessary torque is according to standard piping. The sensor has to be mounted
free of mechanical stress.
Attention:
During mounting of the level sensor BLM-SF-FM, ensure
that no large electromagnetic fields are present in the
mounting area and the level sensor itself.
The electrical connection has to be made by qualified
skilled personnel. The operator has to verify that all applying regulations are maintained.
3. Commissioning
3.1 Completeness of product
…has to be checked during unpacking. If not otherwise ordered, the product travels on risk of the customer. Eventually occurring transport damages have to be indicated instantly with documentation according to the legal
rights..
3.2 Short-term storage
We recommend a dry storage with temperatures above 0 °C. No other
devices or objects are allowed to be stapled onto the sensor. The electrical
connection has to be made by qualified skilled personnel. The VDEregulations or the national specific legal procedures have to be applied.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 7
Hints for handling inflammable media under pressure:
It must be absolutely guaranteed that when an increase of
pressure occurs, no gas-air mixture is present. On the one
hand, the explosion prevention measures apply only under
atmospheric conditions, on the other hand, with increasing
pressure both the temperature can rise (adiabatic compression) and the ignition temperature becomes dramatically smaller. Therefore, slow pressure increases can already result in a severe danger of ignition. Further it has to
be noticed, that the indicated temperature class only applies in combination with the respective ambient temperature.
Attention:
Operation of the device is allowed only under consideration of the corrosion durability in the environmental conditions.
Front cover can be removed to allow access to push buttons (see section 4.1 for details).
(2mm A/F Key not supplied)
Caution
Ensure that the area is non-hazardous before removing
cover.
Ensure that the cover is tightened and secured with the
lock screw after adjustment.
Turn 180° after first touch with the O-ring.
3.3 Assembly and disassembly
Transmitter types BLM-SF-FM are suitable for use in hazardous locations
Class I, Division I Groups A,B,C,D and Class II, Division I Groups E,F,G.
Explosion proof installations could have flammable vapours and liquids
present. Ensure that the safety information below is followed
8 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
Rear cover can be removed to allow access for electrical
connections.
(2mm A/F Key not supplied)
Caution
Ensure that power is turned off before removing cover.
Ensure that the cover is tightened and secured with the
lock screw after adjustment.
Turn 180° after first touch with the O-ring.
Rear cover removed to allow access for electrical connections (see section 3.4 for details)
Caution
Ensure that the cover is tightened and secured with the
lock screw before power is applied to the unit.
Any unused entries must be blanked with a suitable stopping plug
Caution electrical connection
During electrical installation, the operator has to verify that
all applying local and national regulations are maintained
The level transmitters BLM-SF-FM should be
supplied by a two-wire power supply. For data
of the power supply, please see the data
sheet.
3.4 Electrical connection BLM-SF-FM
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 9
Electrical connection:
Use a shielded two-wire cable with a cross section of
22…12 AWG. Crimp-on ring or spade terminal is required.
Field wiring must be rated >10K above the equipment service temperature of +79°C. For maintaining ingress protection IP67 the outer diameter of the cable has to be
7…10mm.
After unscrewing the rear housing cover, connect the supply wires to the terminals “+” and “-” and GND to the hous-
ing. The sensor has an internal and external grounding
clamp.
= GND (Ground)
Attention
According to local regulations, the devices BLM-SF-FM
have to be connected to the over voltage protection and
the potential equalization!
Attention
The sensor must be operated with a fuse ≤200 mA fast as
short circuit protection. This fuse may be positioned in the
power supply or separately. Fuse design voltage must be
equal or higher than rated voltage of the sensor. Breaking
capacity of the fuse must be 1500 A.
In order to maintain the ingress protection according to the data sheet, a
suitable cable gland must be used and tightened accordingly. Check all
seals for damage and ensure that all sealing faces are clean. No liquid
contamination is allowed in the control and terminal box.
10 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
The display has 8-digit alphanumeric characters.
As the character height is 12 mm,
it is clearly legible from larger distances.
Button
Function
- / +
Move through menu structure, change value
OK
Accept value, enter active submenu
Caution electrical connection
Because the loop current can change rapidly, switching or
regulating functions of the process control system should
be disabled when changing 4-20 mA settings.
4. Operating Instructions
4.1 Controls
For usage, the front housing cap has to be unscrewed. An 8-digit alphanumeric LCD is available for optical control of the settings. During normal
operation, it shows the current measured values.
The buttons have the following functions:
4.2 Menu structure
It is possible to conduct parameter settings by using the HART® protocol
via a Field Communicator or PCS (process control system). Furthermore,
all settings can be done directly at the sensor via the display and buttons.
If no button is pressed during a time span of 30 s, the sensor returns to the
parent menu automatically.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 11
4.2.1 Menu structure
The 4-20 mA settings can be changed via the operating menu. Hereby, the
offset (4 mA) and the span (20 mA) can be adjusted.
12 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
4.2.2 Extended menu
All important parameters, as available via HART®, can be adjusted.
Access: Press and hold all three buttons <+>, <-> and <OK> until “SETUP” appears.
Remark: if write protection is enabled (see 4.2.2.14), the sensor asks for
the password. It is “746” and entered via <+>/<-> buttons and acknowledged via <OK>
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 13
Function
Description
Set the offset to
the current measurement value of
the primary variable (PV).
Access:
Setup -> 4-20 mA -> Offset
-> PV actual
Set the offset to
an arbitrary PV
value.
Access:
Setup -> 4-20 mA -> Offset
-> PV value
Function
Description
Set the span to
the current measurement value of
the primary variable (PV).
Access:
Setup -> 4-20 mA -> Span ->
PV actual
Set the span to an
arbitrary PV value.
Access:
Setup -> 4-20 mA -> Span ->
PV value
0
4
8
12
16
20
0 20 40 60 80 100
Current / mA
Measured value / mm
Uncorrected
Span adjusted
4.2.2.1 Adjustment of the offset
The offset (4 mA-point) of the analogue output is adjustable. When setting
the offset, the distance to the span remains constant.
Available functions and their use are:
The standard value of the offset after reset to defaults is 40 mm above the
lower sensor end.
4.2.2.2 Adjustment of the span
The span (20 mA-point) of the analogue output is adjustable.
Available functions and their use are:
The standard value of the span after reset to defaults is 40 mm below the
sealing surface of the thread connection.
14 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
Setting
Description
Linear
xa
(*) standard
x^(1/2)
xa
x^(3/2)
3
xa
x^(5/2)
5
xa
x^2
2
xa
4.2.2.3 Adjustment of the transfer function
The characteristic curve of the analogue output can be selected. The correlation between the PV range and the analogue 4-20 mA value is calculated by a transfer function PV (x) -> analogue output (a). The digital, via
HART available values are not altered by this function (except the current
value). Therefore, it is possible to control e.g. a valve with a non-linear flow
curve directly with the analogue output of the transmitter.
Access: Setup -> 4-20 mA -> Transfer function
The possible settings are:
See also: HART command 47.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 15
Setting
Description
High (21 mA)
Switches current in case of error to >21 mA.(*) standard setting
Low (3.6 mA)
Switches current in case of error to <3.6 mA. **)
Hold
Hold the last valid current value.
4.2.2.4 Setting of the alarm current
The current of the analogue output in case of sensor failure can be selected. The alarm current is set, if the sensor detects no float or the electronics detects a critical failure.
Access: Setup -> 4-20 mA -> Alarm
Possible settings are:
**) Avail.: Available since version 8.32
See also: HART-Command 131. (since Version 8.32)
4.2.2.5 Using of the current simulation mode
The transmitter allows simulation of an user-defined current value. Hereby,
external switching functions or the cabling can be tested.
If small deviations of the measured current value from the set current value are existent, these can be corrected by means of the DAC calibration
function (see below).
Access: Setup -> 4-20 mA -> DAC -> Simulation
Possible values: 3.8 … 20.5 mA
See also: HART command 40.
Avail.: Available since version 8.3.
16 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
Function
Description
Calibration of
the 4 mA point.
.
Calibration of
the 20 mA point.
.
4.2.2.6 Calibration of the analogue output (DAC)
The current output of the transmitter is controlled internally by a digital-toanalogue-converter (DAC). This DAC is calibrated ex works. If deviations
of the set current from the measured current are visible, they can be corrected.
Therefore, an ampere meter is connected in series to the transmitter. After
access of the calibration routine, the analogue output of the transmitter is
switched to 4 mA and the measured current value is entered into the sensor. The same procedure follows directly for the 20 mA point.
Access: Setup -> 4-20 mA -> DAC -> Calibration
Remark: The calibration of the DAC is not influenced by a reset to
works defaults.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 17
4.2.2.7 Selection of the polling address
The HART® polling address can be selected. Hereby, it is possible to supply multiple transmitters with a single current loop. Every transmitter then
can be queried by its unique address.
Access: Setup -> HART -> Address
Possible Values: 0…63 (Standard value: 0)
Remark: HART-Masters up to rev 5 accept only addresses in
the range 0…15.
18 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
4.2.2.8 Selection of the multidrop mode
The multidrop mode of the transmitter can be selected independently from
the unique address. When activated, the loop current of the transmitter is
fixed to 4 mA.
Access: Setup -> HART -> Multidrop
Possible Values: On, Off (Standard value: Off)
4.2.2.9 Selection of the multidrop mode
The measurement values of the sensor can be damped exponentially.
Therefore, the time constant of the damping can be adjusted.
Access: Setup -> HART -> Prim Var -> Damping
Possible Values: 0 … 999.9 s (standard value 0.0 s).
Example: Waves in the tank should be suppressed.
By statistical analysis, a damping constant of 5 s is
calculated. The setting is applied by Setup -> HART
-> Damping -> Level -> τ = 5 s.
Result: The transmitter shows 64 % of the actual
measurement value after 5 seconds.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 19
Variable
Channel
Value
Units (short)
PV 0 Level
m
(*)
, mm, cm, ft, in
SV 1 Interface
m
(*)
, mm, cm, ft, in
TV 2 Electronics temperature
°C
(*)
, °F, °r, K
QV 3 Signal-to-Noise ratio
dB
4 Percent PV **)
%
5 Analogue current **)
mA 6
Filling volume
m3
(*)
, gl, l, ig, br, bs, y3, f3, i3, lb
7 Percent filling volume
%
8 Filling mass
kg
(*)
, g, t, p, st, lt, ou
244
Percent PV **)
%
245
Analogue current **)
mA
246
PV **)
247
SV **)
248
QV **)
249
TV **)
4.2.2.10 Using the PV simulation mode
For diagnostics purpose of the connected process control system, it is
possible to simulate an arbitrary measurement value without moving the
float physically. Hereby, external switching functions and cabling can be
tested.
Access: Setup -> 4-20 mA -> PrimVar -> Simulation
Possible values: -100 … (SL+100) mm
4.2.2.11 Mapping of the analogue output to a measurement channel
It is possible to use any measurement channel of the sensor for control of
the analogue output. This channel is designated “PV” (Primary Value). By
means of the HART® protocol, all channels can be read out at any time.
Access: Setup -> HART -> PrimVar -> Mapping
Possible settings are:
(*): Standard setting **): Not available as PV
20 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
Unit
Short form
Code
Unit
Short form
Code
Degrees Celsius
°C
32
Percent
%
57
Degrees Fahrenheit
°F
33
Gramm
g
60
Degrees Rankine
°r
34
Kilogram
kg
61
Kelvin
K
35
Ton t 62
Gallon
gl
40
Pound
ls
63
Litres
l
41
Short tons
st
64
Imperial gallons
ig
42
Long tons
lt
65
Cubic meter
m3
43
Bushels
bs
110
Feet
ft
44
Cubic yard
y3
111
Meter
m
45
Cubic feet
f3
112
Barrels
br
46
Cubic inch
i3
113
Inch
in
47
U.S. liquid
Barrels
lb
124
Centimetre
cm
48
Ounce
ou
125
Millimeter
mm
49
Decibel
dB
249
4.2.2.12 Setting of the units
The unit, in which a measurement value is calculated and displayed, is
selectable. The setting applies for both display and digital values which are
transmitted via HART®.
Access: Setup -> HART -> Units
Possible units are (availability varies acc. To the chosen channel):
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 21
0
20
40
60
80
100
0 20 40 60 80 100
Mea sured va lu e / m m
Set value / mm
Uncorrected
after Trim
4.2.2.13 Trim of measurement values
It is possible to adjust a measurement value if it deviates systematically
and reproducible from the set value. Therefore, a precisely defined process condition has to be established. Then, it is entered in the trim menu.
Access: Setup -> HART -> Trim
Example: The transmitter shows a liquid level of 120 mm. By a fuel
level plunger, a true level of 125 mm is measured. The value for the correction is entered by Setup -> HART -> Trim ->
Level -> 125 mm. The transmitter now shows a liquid level
of 125 mm.
Remark: A trim can be applied to liquid level, interface, electronics
temperature and absolute filling volume.
See also: HART command 80, 81, 82 and 83.
Avail.: Available since version 8.3.
22 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
4.2.2.14 Enabling and disabling of the write protection
The transmitter can be protected against accidental parameter changes.
Hereby, all parameter changes via HART® are denied and the entry to the
setup menu is protected by a password.
The password is fixed to “746”. If write protection has been turned on, it
has to be entered by <->, <+> and acknowledged by <OK> when accessing the setup menu.
Access: Setup -> HART -> Write protect
Possible Values: On, Off (Standard value: Off)
Remark: If write protection is active, the error code “Device
write protected” is returned for all writing HART®
commands.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 23
4.2.2.15 Setting of the tank shape and characteristic curve
The transmitter allows selection of a tank shape according to VDI/VDE
3519 page 1 (DIN 28 011/28 013). Hereby, the volume is calculated from
the product level (not interface) and displayed.
Access: Setup -> Tank
Available values are:
24 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
Selection
Description
Level = 0
Top
Mounting with sensor head pointing
upwards.
at lower sensors end
Bottom
Mounting with sensor head pointing
downwards.
at thread sealing surface
For calculation of the fill mass, the density (specific weight) of the medium
has to be entered additionally.
Access: Setup -> Tank -> Density
Possible values: 0…9999 kg/m³
4.2.2.16 Selection of the mounting direction
The sensor can be mounted from top or bottom into the vessel. This command turns the digital sup-plied values in a way that the level and interface
always count from zero (bottom) upwards.
Hereby, the float has to be turned in a way that its “TOP” marking always
points upwards.
Access: Setup -> Sensor -> Mounting
Possible values:
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 25
Setting
Possible magnets
magnetisation
sensor position
-N-→
Bar magnet
Tri-pole (with pole disc)
radial, N
outwards
in direction of the pole,
max. 25 mm from pole
-S-→
Bar magnet
Tri-pole (with pole disc)
radial, S outwards
in direction of the pole,
max. 25 mm from pole
↑S-N-S↓
Tri-pole (with pole disc
**)
radial, N in middle
in direction of the pole,
max. 25 mm from pole
↑N-S-N↓
Tri-pole (with pole disc
**)
radial, S in middle
in direction of the pole,
max. 25 mm from pole
4.2.2.17 Selection of the used magnet type
The sensor functions with several float magnet types. For correct function,
the type of the used magnet type has to be entered into the sensor.
Due to the fact that a wrong magnet type affects measurement seriously,
the customer should take extreme care when using this function. The setting is not affected by a reset to factory defaults.
Access: Setup -> Sensor -> Magnet
Possible settings:
*) standard value
**) suitable for weak magnetic fields. The sensor will work without temperature compensation.
4.2.2.18 Display of the serial number
The serial number can be displayed for informative reasons, if it is not
readable from the outside.
Access: Setup -> Sensor -> Info -> Serial
4.2.2.19 Display of the maximum temperature
The maximum electronics temperature is recorded and can be displayed
for informative reasons.
Access: Setup -> Sensor -> Info -> TM ___°C
26 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
Setting
Description
iToggle *)
Toggles every 3 seconds between Level, Interface, Temp PCB,
SNR, Percent PV, Current, absolute Filling volume, percentage
Filling volume and filling mass. If a measurement value is changing
currently, it will be shown automatically.
Access: Display -> Modus -> iToggle
Remark: If the level or interface changes more than one digit, it will
be displayed automatically until it settles. Afterwards, the
values will be displayed again cyclically.
Value
Displays constantly a selectable measurement value.
Access: Display -> Mode -> Value
The possible channels are shown in the table below. The unit of the
measurement value and the number of displayed digits varies acc.
to the selected unit.
Bar graph
Displays PV (primary value) as a bar graph.
Access: Display -> Mode -> Bar graph
Value
Display
Description
Level
L___mm
Product level in mm, 5 digits
Interface
I___mm
Interface level in mm, 5 digits
Temp PCB
Tc±___°C
Temperature of the electronics in °C, 4 digits
SNR
SN__._dB
Signal-to-Noise-Ratio in dB, one decimal point.
)(
)(
ln20
NoiseU
SignalU
SNR
dB
If the SNR approaches 0, no measurement is possible anymore. In this case, please return the sensor back to the manufacturer.
PV %
PV__._%
Percent PV-Range
Current
_.__mA
Current of the analogue output in mA, 3 decimal
digits
Vol abs
V__.__m³
Absolute filling volume in m³, 2 decimal digits (*)
Vol %
V__.__%
Relative filling volume in m³, 2 decimal digits (*)
Mass
m___kg
Filling mass in kg, 5 digits (*)
4.2.2.20 Setting of the display mode
The display’s value can be set for the normal operation.
Access: Setup -> Display -> Mode
Possible settings are:
*) standard value.
(*) Only available, when tank shape has been selected.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 27
4.2.2.21 Setting of the display language
The language of the sensor can be set to accommodate local operating
personnel.
Access: Setup -> Display -> Language
Possible Settings: German, English
4.2.2.22 Setting of the display contrast
The display is temperature compensated over the whole temperature
range of the transmitter. To enhance readability under difficult lightings,
the contrast can be adjusted.
Access: Setup -> Display -> Contrast
Possible values: 7…30
Default value: 24
4.2.2.23 Reset transmitter to factory default
All user defined settings can be reset to factory defaults.
Affected settings: 4-20 mA, HART, display, tank
Access: Setup -> Factory defaults -> (acknowledge safety query)
28 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
Attention:
In multidrop-mode (available in the “HART”-menu), the
transmitter output will be fixed at 4 mA. Transmission of
the measured values is available over the HART®-protocol
only.
5. Analog output
The transmitter incorporates an analogue 4-20 mA output. The primary
value (PV, see chap. 4.2.2.11) is transformed to the 4-20 mA range. The
offset is at 4 mA, the span at 20 mA.
The transmitter over steers the current limits according to NAMUR NE 43,
i.e. the minimum current is 3.8 mA and the maximum current is 20.5 mA.
In the case of error (e.g. defective electronics), the current will be set to
>21 mA or <3.6 mA (selectable). If “hold last value” has been set in the
4-20 mA-menu, the last good current is kept.
The setting of the analogue output is possible, as described in chap. 4.2.2.
Furthermore, a transfer function (see 4.2.4.3) can be used to select a non-
linear response of the analogue output. This can be used e.g. to drive a
valve directly with the analogue output.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 29
Device
From date
MOS
Comments
HW
Firmware
0
8.00
16.02.2007
Rev. 0
1 8.10
07.07.2008
Rev. 1-2
New HART commands 41, 48
2
8.20
26.11.2008
Rev. 3-4
New HART commands 34, 42
damping selectable in display
2
8.30
20.03.2009
Rev. 5-6
New HART commands 80, 81, 82,
83
Units and current simulation selectable in display
2
8.31
12.08.2009
Rev. 7
Alarm current of 3.6 mA selectable, SIL2
2
8.32
01.03.2010
Rev. 8-10
New HART commands 128, 129,
130, 131
Mounting direction and magnet
type selectable
6. Version History
The delivered device versions and applicable revisions of the manual for
the device and the monitoring and operating system (MOS) are listed in
the following table. In any case, the operation of the device and the available HART commands are upwards compatible.
30 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
Failure
Causes
Measures
No function
Power supply not connected.
Screw terminals loose.
Check power supply.
Tighten screw terminals.
Output does not
reach 4 mA or 20
mA
Offset and/or Span not
properly set.
Supply voltage insufficient.
Correct offset and span.
Check supply voltage.
Output does respond
to level changes.
Float not in measurement
range.
Density of medium too low.
Disturbing magnetic field in
range of sensor.
Current simulation or multidrop-mode is active.
Wrong magnet type selected.
Wrong mounting direction
selected.
Sensor defective.
Check float stops.
Check float’s density.
Remove magnetized mate-
rials or magnets in the sensor’s range.
Deactivate current simulation or multidrop-mode.
Enter correct magnet type.
Enter correct mounting
direction.
Contact service.
Output < 4 mA or >
20 mA
Float out of measurement
range.
Set up range correctly and
check float stops.
Output < 3.8 mA or >
20.5 mA
Float defective.
Wrong magnet type select-
ed.
Wrong mounting direction
selected.
Transmitter electronics
defective.
Check float.
Enter correct magnet type.
Enter correct mounting
direction.
Contact service.
7. Faults
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 31
Display „Release
buttons!“
Buttons pressed/blocked.
Buttons defective.
Release buttons/remove
blockade.
Contact service.
Display „RAM failure!“
Volatile memory defective.
Contact service.
Display „HARTModem failure!“
HART®-Modem defective.
Contact service.
Display „DAC failure!“
Digital-to-AnalogueConverter for loop control
defective.
Contact service.
Display „Sensor not
calibrated!“
Non-volatile memory defective.
Contact service.
32 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
8. Service and repair
Under normal conditions, the sensor has not to be serviced. If there is
thorough pollution in the application, one should create service instructions.
If the sensor is defective, return it back to repair to the manufacturer.
Attention! Send in original packing.
Attention! Please supply a filled out copy of the attached Return-to-
Manufacturer form for return, otherwise the repair can’t be
processed.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 33
9. Liability
The operator is responsible for qualified and proper usage of this sensor.
The manufacturer is responsible for the proper construction. Improper
mounting and usage of devices can lead to loss of guarantee.
For usage in hazardous areas, special terms and regulations apply
34 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
WARNING!
Bodily injuries, property and environmental damages due
to measuring material residues
Measuring material residues in a disassembled unit can result
in risks to persons, the environment and equipment.
Wear the necessary protective equipment
Flush and clean the disassembled unit in order to pro-
tect persons and the environment from risks posed by
adhering measuring material residues.
10. Dismounting, return and disposal
8.1 Disassembly
Only disassemble the measuring unit when it has been disconnected from
voltage!
8.2 Return shipment
Use the original packaging or suitable transport packing for the return
shipment of the unit.
Instructions for return shipment can be found in the “Service” section on
our local website.
8.3 Disposal
Incorrect disposal can result in risks to the environment.
Dispose of unit components and packaging materials in an environmental-
ly compatible manner in accordance with the country-specific waste management and disposal regulations.
WIKA Operating Instructions Level Transmitter – BLM-SF-FM 35
Manufacturer contact
Sales contact
KSR Kuebler Niveau-Messtechnik AG
Heinrich-Kuebler-Platz 1
69439 Zwingenberg am Neckar • Germany
Phone. +49 6263/87-0
Fax +49 6263/87-99
info@ksr-kuebler.com
www.ksr-kuebler.com
WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg • Germany
Phone. +49 9372 132-0
Fax +49 9372 132-406
info@wika.de
www.wika.de
GAYESCO-WIKA USA, L.P.
229 Beltway Green Boulevard
Pasadena, TX 77503
Phone. +1 713 475-0
Fax +1 713 475 0011
info@wika.com
www.wika.us
KSR Kuebler subsidiaries worldwide can be found online at www.ksr-kuebler.com.
WIKA subsidiaries worldwide can be found online at www.wika.com.
36 WIKA Operating Instructions Level Transmitter – BLM-SF-FM
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