FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
Variable area flowmeters
Vortex flowmeters
Flow controllers
Electromagnetic flowmeters
Ultrasonic flowmeters
Mass flowmeters
Level measuring instruments
Communications technology
Engineering systems & solutions
Operating Instructions
User’s Manual________________________________________________________ 6-Oct-00
Level-Radar
BM 702
Page 1 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Software History
Introduction Signal converter User program Instructions
Mth./YrHard-
ware
Firmware Hard
-
Operating
system
ware
04/00 BM 702 7.00PREnn PC DOS 5.0
and higher
Win95/98/N
T
Test versions for BM 702.
07/00 BM 702 7.00 PC DOS 5.0
and higher
Win95/98/N
T
First series version for BM 702.
Software
PC-CAT
3.02
PRE01
PCCAT
Win
4.00
PC-CAT
3.01
PCCAT
Win
4.00
Device User
program
05/00 7.02221.11+
Suppl.
instruction
Online
help
07/00 7.02221.11+
Suppl.
instruction
Online
help
Items included with supply
The scope of supply includes, in the version as ordered:
• Signal converter bolted to waveguide window and antenna; optionally: antenna extension, sunshade (with
fastening material in each case)
• Shielding material with tightening strap (not for the US market)
• Installation and operating instructions plus instruction card
• Report on factory settings for the signal converter
• Certification and approval documents, unless reproduced in the device documentation
Installation material (stud bolts, flange gasket and cabling) not supplied, to be provided by customer!
Page 2 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Contents
1 Handling and storage.................................................................................................3
2 Installation..................................................................................................................4
2.1 Field assembly...........................................................................................................4
2.2 Mechanical installation...............................................................................................5
3 Electrical connection..................................................................................................7
4 Setting the parameters...............................................................................................8
5 Maintenance, error handling.....................................................................................19
6 Safety information.....................................................................................................20
7 Technical data (extract)............................................................................................21
8 BM 702 Level-Radar Type code...............................................................................23
9 Parameter check list.................................................................................................25
Product liability and warranty:
The BM 702 level gauge is designed solely for measuring the level,
distance, volume and reflection of liquids, pastes, slurries, particulate
materials and solids.
The BM 702 level gauge does not form part of an overfill protection
system as defined in the WHG (= German water pollution regulation).
Local codes and regulations apply to its use in hazardous areas.
Responsibility as to suitability and intended use of these level gauges rests
solely with the user.
Improper installation and operation of our level gauges may lead to loss of
warranty.
In addition, the "General conditions of sale", form the basis of the
purchasing contract.
If you need to return the level gauge to the manufacturer or supplier, please
refer to the information given in Section 5
Handling and storage
Safety advice
i
Depending on the version, the device will weigh between approx. 5 kg and
30 kg. To carry, use both hands to lift the device carefully by the converter
housing. If necessary, use lifting gear.
When handling the BM 702, avoid hard blows, jolts, impact, etc.
When storing the "Wave-Stick" version, make sure that the device is not placed on its side on the PTFE antenna,
as this may cause the rod to bend.
Page 3 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Installation
Most of the BM 702 versions are supplied in fully assembled condition. In this case, you may skip this chapter.
However, if a device should be delivered in parts, or parts are subsequently replaced, the following should be
noted.
Field assembly
• For any necessary field assembly of
the BM 702, all parts are included
with the supply (stud bolts,
washers, etc.).
• Bolt the waveguide window (flange
mount) or distance piece, if
supplied loose, to the BM 702.
Torque for the sets of 4 Allen
screws M (key size 5 mm): max. 8
Nm ∼ 0.8 kpm (5.8 ft lbf).
signal converter
distance piece (for
high-temperature version
up to 250°C (482 °F)
antenna extension
H
BM70 A
connecting flange
upper Teflon plug
O-ring
lower Teflon plug
M
O-ring
M
• Note: Ensure the upper Teflon plug
is kept absolutely dry and clean!
Moisture and dirt will impair
functionability of the BM 702!
• Bolt antenna extension to the
antenna; torque for the 3 stud bolts
A: max. 8 Nm ∼ 0,8 kpm (5.8 ft
lbf).
Do not detach bolts H !
Version:
BM 702
converter
High temperature
distance piece
(optional)
Stick
Flange
plate
Stick
Gasket
antenna
Horn
Gasket
antenna
Horn
A
Separation
(Metaglass)
antenna
Flange
plating
(for Hastelloy,
Ti, Ta)
Wave-Stick
PTFE
Wave-Stick
w/o plate
(PP or PTFE)
max. 2 bar
LP flange system
max. 2 bar
with horn antenna
Flange system 96
with horn antenna
Page 4 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Mechanical installation
Hazardous-duty systems:
• The BM 702 Ex is certified in conformity with European Standard for
use in Zone 0, 1 and 2 hazardous locations (dependent on version).
• Attention is drawn to the data and information given on the nameplate
of the converter, the nameplate of the flange and the specifications in
the approval certificates.
Safety:
• Check material compatibility of antenna, extension, flange, gaskets,
and PP or PTFE
(used in all versions) with the product! See also section 8 "Type code"!
Mounting on the tank nozzle
a) Devices with horn antenna:
The antenna should project out of the nozzle. If necessary, use an antenna extension. Exception: in case of a
symmetrical tank fitting.
Antenna
Tank nozzle
Tank nozzle
extension
Tank nozzle
b) Wave-Stick
Note the requirements imposed on nozzle diameter and nozzle length:
Version for
Tank nozzle
min. 50 mm
min. 200 mm
still wells
dia. 40...55 mm
e.g. DN50
Page 5 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
•
•
•
User’s Manual________________________________________________________ 6-Oct-00
c) Purging device
Remove screw plug ¼" R and screw
in screwed tube joint, e.g. Ermeto
¼" R.
Consult “Ex“ specifications
relating to the purging circuit
(provided by customer)!
Spülvorrichtung
Installation on the tank
Do not forget the gasket when
positioning the BM 702 on the
tank nozzle flange. Align
BM 702 and gasket, slightly
tighten nuts on stud bolts (by
hand).
Press shielding strip C* in the
gap between tank and BM 702
flanges and secure with strap
retainer S* (both items included
with supply).
Strap retainer S* must fit
closely and overlap both flanges.
* only required for European radio
approvals
• Tighten down stud bolt nuts
firmly. The tightening torque is
dependent upon the strength
properties of the stud bolts and
the pressure rating of the tank
C* = shielding strip B = BM 702
flange
S* = strap retainer F = tank flange
Positioning on the tank
>1/7×H, but max. 1/3×D
D
H
Recommended distance Do not position in Do not position
from the tank wall tank centerline! above internals!
(multiple reflections!) (interference reflections!)
A Stilling well or Wave-Guide may be mounted in any position on the tank!
Page 6 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
When using the PTFE Wave-Stick in hazardous areas of Zone 0, any
electrostatic charging of the stick, e.g. by flow of product, must be
avoided!
Electrical connection
To open the signal converter, please use a screwdriver and release the four visible screws on top of the blue
housing.
Terminal assignment
BM 702:
4-20mA
The polarity of the 4-20 mA
connection is arbitrary.
FE
cable gland
Equipotential bonding
When used in hazardous areas, the BM 702 Ex can be incorporated in the PA equipotential bonding system,
e.g. by using the separate U-clamp terminal at the “neck“ of the BM 702 Ex.
1
2
currentloop
Rated temperature of connecting cables: see Section 6.
Supply voltage at the terminals (1,2)
The 4-20 mA supply must be able to provide the following voltage U at the terminals of the BM 702 –
dependent on the current I. Please consider also the line resistance and possible loads on the
secondary side of the supply unit.
U
17V
16V
15V
14V
13V
I
3.6mA
4mA 12mA8mA 16mA 20mA
The allowed upper limit R for load+line resistance is depending on the specification of the supply unit:
U @20mA (supply
14 V 15 V 16 V 17 V 18 V
unit)
Max. resistance R
50 Ω 100 Ω 150 Ω 200 Ω 250 Ω
22mA
Page 7 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
≥ 120 Ω
User’s Manual________________________________________________________ 6-Oct-00
Setting the parameters
RS232
Adapter
isolation
amplifier
Setting parameters via program PC-CAT
With the program PC-CAT, version 3.01 or higher, you can configurate BM 702 instruments in a very
comfortable way from a PC. Connect the non-intrinsically safe side of the isolation amplifier over a load
between 120 Ω and 350 Ω to the Smart adapter (delivered together with PC-CAT) and connect it with a serial
port of the PC.
The used isolation amplifier must be HART compatible.
Local display (optional)
4
Füll. m
1
m
3
BM702
9.500
2
_____
4
(1) Numeric display, measured
values
(2) Alphanumeric display,
function/unit
(3) 6 Markers to display
measurement status
(4) 4 keys for configuration and
error interrogation
Page 8 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Function of keys (only together with local display)
Operator control can be carried out with the aid of local display unit after opening the housing. However, a
particularly convenient form of parameter setting is offered by the PC program PC-CAT (special accessories, see
above).
→ (cursor key) - selects the configuration menu,
- branches the menu to the next lower level,
- shifts the cursor* to the next column on the right.
↑ resp. ↓ (select key) - branches the menu to the next digit on the same
level,
- changes the content (digit, text character) at the
cursor* position.
↵ (ENTER key) - branches the menu to the next higher level,
- stores newly entered parameters,
- executes displayed functions,
- selects special functions (e.g. error memory,
see Sect. 5).
* The cursor position is signalled by flashing of the character at the appropriate place.
Meaning of status markers (only for version with local display)
The 6 markers θ x below the local display only show information about the status of measurement and are no error displays!
θ1: No current measured value: The device is searching for a new value. If the
search for a plausible level fails for a certain time, "SIGNAL DOWN" appears as
error display.
θ 2: Signal too strong: Mean of reflected microwaves is very high. Gain is automa- tically stepped down.
θ 3: Poor spectrum: Brief showing of this marker has no significance. If permanently
on, this may result in uncertain (incorrect) measured values or the error message
"NO M.VALUE".
θ 4: No measured value as yet: Evaluable measured values not available after the
device has been started up. Measured value automatically set to the level of the
tank bottom. This marker disappears when the first valid measured value is
obtained.
θ 5: Tank bottom: In tanks with dished bottom, for example, the measuring signal can
"disappear" if measurements are carried out near the bottom. The measured value
is then automatically set to the level of the tank bottom.
θ 6: Measurement frozen: Device is in the block distance detection (see below).
Page 9 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Simply scaling the current output
1) Drain the tank completely to the 0% marking (= 4 mA)
2) Press the lower keys (↵ und ↓) down, until
„TANKHEIGHT|********“ are replaced by the actual measured distance
value 2).
3) Then release and press ↵. In the lower line: „SURE NO?“ is displayed.
TANKHEIGHT
1234 mm
↵
TANKHEIGHT
1234 mm
SURE NO?
0%
1)
.
the asterisks on the display
4) If this value is not plausible or the tank is not empty, abort by ↵. Or accept the value by pressing ↑ (“SURE
YES?”) and then ↵.
2.
5) Now the tank height is set.
6) In the next step you can also enter this value as 4 mA scaling (0%). Press ↵. In the lower line now: „SURE
NO?“ is displayed again.
7) If this value shall not be stored, abort by ↵. Or accept this 4mA scaling by pressing ↑ (“SURE YES?”) and
then ↵.
8) Fill the tank to the 100% mark. Use the same procedure for the 100% point = 20 mA only now by pressing the
top keys
2.
100%
→ and ↑ 1) 2).
TANKHEIGHT
1234 mm
SURE YES?
SCALE 4mA
0 mm
↵
SCALE 4mA
0 mm
SURE NO?
SCALE 4MA
0 mm
SURE YES?
BLOCKDIST.
567 mm
↵
1.
1.
9) First the measured distance can be taken as block distance. After this you can enter or adjust the 20 mA point
(100%) according to the actual level.
1) This example was written for the case: current output = level (default). For distance measurement the points 0% (short distance = high
level) and 100% (large distance = low level) are exchanged
2) If no reliable measurement is possible „NO ACCESS“ is displayed. Abort by pressing ↵ .
Page 10 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Description of functions
The table on the following 3 pages provides an overview of all parameters that can be set in the configuration
menu.
This is followed by more precise explanations of some functions and a typical configuration.
Configuration menu (version 7.00)
Function (Fct.) Input range Description
1.0 OPERATION
1.1 DISPLAY
1.1.1 FCT.DISP identical with 3.2.1
1.1.2 UNIT.LENGTH identical with 3.2.2
1.1.3 UNIT.CONV. identical with 3.2.3
2.0 TEST
2.1 HARDWARE
2.1.1 MASTER Master hardware test.
2.1.2 DISPLAY Display hardware test.
2.1.3 STATUS Status information for
2.2 CUR.OUTP.I
2.2.1 VALUE I Value display Display of actual value of
2.2.2 TEST I Select 3.6 mA/4 mA/6 mA/...
... 20 mA/22 mA
2.4 FIRMWARE
2.4.1 MASTER Display Display of master
3.0 INSTALL.
3.1 BASIS.PARAM
3.1.1 TANKHEIGHT Select unit m/cm/mm/
inch/Ft
Enter
0.50 ... 20.00 [m]
3.1.2 BLOCKDIST Enter
0.10 [m] ... tank height
3.1.3 ANTENNA Select
STANDARD
WAVE-STICK
3.1.4 ANT.EXTENS. Enter 0.00 [m] ... tank
height
3.1.5 DIST.PIECE Enter 0 ... 2000 [mm] Enter length of distance
3.1.6 STILLWELL Select NO /
YES
If “YES“: enter 25 ... 200
[mm]
Service
the current output.
Output of selected value to
the current output. With
safety query.
firmware version.
Enter tank height (see
explanatory notes).
The unit entered here is
also used for all other
length entries.
Enter block distance =
non-measurable range
below bottom edge of
flange (see explanatory
notes).
Select antenna type.
WAVE-STICK for all
Wave-Stick versions,
except type "SW" for
stillwells.
All other = STANDARD.
Enter length of antenna
extension (not for WaveStick: set to= 0)
piece above flange (high
temp. version = 120 mm).
Selection: without or
with still well.
With still well: enter
inside diameter in
[mm] (compensates
different wave speeds
in still wells)
Page 11 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Function (Fct.) Input range Description
3.1.7 REF.OFFSET Enter -10.00...0...+10.00
[m]
Reference offset is
added to measured
distance values.
3.1.8 TB.OFFSET Enter-100.00...0...+100.00
[m]
Tank bottom offset is
added to measured
level values.
3.2 DISPLAY
3.2.1 FCT.DISP Select
LEVEL
DISTANCE
CONVERSION
3.2.2
UNIT.LENGT
H
Select
m/cm/mm/
inch/Ft/
PERCENT/BARGRAPH
3.2.3 UNIT.CONV. Select m3/l(Liter)/US
Gal/
GB Gal/Ft3/bbl/PERCENT/
BARGRAPH/USER UNIT
Select function of
display (value to be
displayed). See also
explanatory notes.
Select unit for length
value to be displayed
(only for level and
distance).
Select unit for conversion value to be displayed (“volume
table“).
(see explanatory
notes)
3.2.4 USER UNIT Text entry
10 characters
Enter user-defined unit
for the conversion
table.
3.2.5 ERROR MSG. Select
NO/YES
Select whether error
messages to be shown
in display.
3.3 SIGNAL
OUT
3.3.1 FUNCTION I Select
OFF/LEVEL/DISTANC
Select function of the
current output.
E/
CONVERSION/SW.OUTP.
3.3.2 RANGE I Select 4-
20mA
4-20mA/E3.6
4-20mA/E22
Select range/error
status for the current
output (hold last value
or 3.6 mA/22mA in
error status)
3.3.3 SCALE 4mA
Enter -200.00 ... +200.00
[m]
0.00 ... 99999.99 [m3]
Enter lower measuring
range value for the
current output (4 mA).
(see explanatory
notes)
3.3.4 SCALE 20mA Enter -200.00 ... +200.00
[m]
0.00 ... 99999.99 [m3]
Enter full-scale range
value for the current
output (20 mA).
(see explanatory
notes)
3.3.5 BAUDRATE Select 1200BdBaud rate for HART
communication (do
not change!).
3.3.6 ADDRESS Enter 0 ...
255
Enter device address.
(for HART multidrop)
Page 12 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Function (Fct.) Input range Description
3.3.7 PROTOCOL Select
HART/KROHNE-PC
Select
communications
protocol
3.4 USER DATA
3.4.1 LANGUAGE Select GB-
USA/D/F/I/E/P/S
3.4.2 ENTRY
CODE 1
Select
NO/YES
Select language for the
optional display.
Switch the access
lockout on/off.
If YES, for every
access a 9-digit entry
code on the 4 keys is
necessary.
3.4.3 CODE 1 Enter code
(RRREEEUUU)
Enter the entry code
for access lockout.
3.4.4 LOCATION Enter text (8 characters) Enter a device
identifier.
3.5 APPLICAT.
3.5.1 AUTO
TANKH.
Special function Automatic
determination of tank
height
(see explanatory
notes).
3.5.2
EMPTY.SPEC
.
Select
OFF/ON/
RECORD
Recording the profile
of the empty tank
(empty-tank spectrum)
(see explanatory
notes).
3.5.3 TIMECONST. Value 1...10...100
[s]
Enter time constant for
measured-value
filtering
3.5.4
TRACING.VE
L.
Value
0.01...0.50...10.00
[m/Min]
Enter the maximum
rate of change in level
that can occur in
operation.
3.5.5 MULT.REFL. Select
NO/YES
Switch the multireflection identifier
on/off.
3.5.6 BD-DETECT. Select
NO/YES
Switch the block
distance (overfill)
identifier on/off (see
explanatory notes).
3.5.7 FUNCT. FTB
Select
OFF/
PARTIAL
Select function of tank
bottom tracing system
(see explanatory
notes).
3.5.8 EPSILON R Enter
1.1000 ... 8.0000
Enter relative
permittivity of product
(only for Fct. 3.5.7)
3.5.9 TANKTYPE Select
STORAGE T./
PROC TANK
Select tank type.
STORAGE T. =
smooth product
surface
PROC TANK =
Page 13 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Function (Fct.) Input range Description
slightly disturbed product surface
The default settings are marked in the table bold.
Page 14 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
zone
User’s Manual________________________________________________________ 6-Oct-00
Explanatory notes
Tank height
The tank height (Fct. 3.1.1) for the BM 702 is defined as the distance between the top edge of the tank
connecting flange and the bottom reference point. The bottom reference point is that “point“ in the tank on which
the microwaves of the BM 702 hit and from which they are reflected. This may be the tank bottom (symmetrical
tank with flat bottom) or the non-horizontal part of the bottom (e.g. tank with dished bottom) or an additionally
fitted plate. The BM 702 cannot measure below this point (“sump“ in the tank).
Note: When the tank is completely empty and the tank bottom provides good reflections (flat, not dished
bottom!), the tank height can also be automatically determined with the aid of Function Fct. 3.5.1 AUTO
TANKH. Before confirming, check carefully that the proposed tank height is plausible!
Block distance
The “block distance“ function (Fct. 3.1.2) defines a zone below the top reference point in which measurements
are not meant to take place. The value should be at least 10 - 20 cm greater than the length of antenna+antenna
extension, or at least 20 cm in the case of the Wave-Stick.
Signals within the block distance are suppressed; a rise in the tank filling above this limit (response threshold)
will lead to a measuring result corresponding to a distance = block distance, when Fct. 3.5.6 BD-DETECT. is
switched on.
Scaling of the current output
The scaling of the current output (Fct. 3.3.3: level 1 = 4 mA ; Fct. 3.3.4: level 2 = 20 mA) should if possible lie
within the measuring range (between bottom reference point and response threshold).
By pressing the two upper keys (→ and ↑) or the two lower keys (↵ and ↓) at the same time, the 0% setting (= 4
mA) or 100% setting (= 20 mA) can be programmed according to the actual level (see page 9).
max
20
(Fct. 3.3.4)
mA
[e.g.: 4.0 m]
current output
min
4
mA
(Fct. 3.3.3)
[e.g.: 0.4 m]
lower reference point
(tank bottom / datum point)
[e.g.: 0]
Fct. 3.1.4
[e.g.: 0]
tank height
(Fct. 3.1.1)
[e.g.: 5.30 m]
non
measurable
Fct. 3.1.5
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
upper reference point
(top edge of tank connecting flange)
block distance (Fct. 3.1.2)
[e.g.: 0.6 m]
response
threshold
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
measuring
range
Sump
Page 15 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Empty-tank spectrum
To enable the BM 702 to identify and blank out interference signals, e.g. caused by fixed and moving tank
internals, the tank profile (empty-tank spectrum) needs to be recorded once only prior to (initial) start-up. For
recording, the tank should be completely empty and all moving parts (e.g. agitators) switched on. If major interference through internals is not expected, recording of the empty-tank spectrum can also be dispensed with, since
the factory has already carried out and stored a partial empty spectrum of the flange system.
Empty-tank spectrum recording via display
After selecting menu item Fct. 3.5.2, press key →. The display then shows whether the empty spectrum is
currently ON or OFF. Then press the ↵ key if no change is to be made, or use the ↑ key to choose between the
following options:
• ON: the empty-tank spectrum is (again) switched on and taken into account for measurements.
• OFF: the empty-tank spectrum is not taken into account for measurements, but remains stored in the
BM 702 and can be switched on again at a later date.
• RECORD: the existing empty-tank spectrum is to be deleted and a new one recorded.
After selecting "RECORD": if other parameters had previously been changed, the query "ACCEPT YES" is first
made as to whether they are to be stored. In this case, confirm by pressing ↵. To record, use the ↑ key to select
one of the following options:
• MAX. VALUES: (only maximum values are taken into account when the empty-tank spectrum is
recorded; useful e.g. with “difficult“ agitators).
• AVERAGE: (values are averaged; this setting can be used for most applications).
After selecting with the ↑ key, press the ↵ key to select TOTAL or the ↑ key to select PARTIAL.
• When TOTAL is selected, the empty-tank spectrum is recorded over the entire range (tank height).
• If the tank has not been fully drained, the empty-tank spectrum can also be recorded up to a certain
distance, in which case the menu item PARTIAL should be selected. When this has been selected, a query
takes place by way of the ↵ key concerning the distance value up to which the empty-tank spectrum is to
be recorded. The tank area below the current filling level is then excluded from the empty-tank recording.
It is recommended to maintain a safety distance of 20 to 30 cm from the actual product distance.
Subsequently press key ↵ to start recording the empty-tank spectrum. The display starts with “200“ and counts
down to “0“. The sign WAIT... is shown in the display. READY appears after approx. 1-3 minutes. Then press
key ↵ five times to store the recorded empty-tank spectrum, which is taken into account for measurements.
Empty-tank spectrum recording via PC-CAT
Connect the BM 702 and press in the display mode of PC-CAT the key combination Ctrl-L. The type of emptytank spectrum can be selected by one of the following keys:
1: Max.Values 4: Max. Partial A: Break
2: Average 5: Avg. Partial
Tank bottom tracing mode (FTB)
The BM 702 includes an additional function for measuring reliably low levels in tanks with flat bottom and
poorly reflecting products (low dielectric constant). This tank bottom tracing system (abbreviated FTB) is
activated in the vicinity of the tank bottom (max. 20% level). Given higher levels, the normal measuring method
is used (reflection from the product surface).
If the measurement jumps to the correct level only after filling above a certain level (approx. 0.3-1.0 m), you can
activate the FTB function Fct. 3.5.7 „PARTIAL“. The relative permittivity εr of the tank product must be set in
Fct. 3.5.8. If it is not known, enter the figure of 2.0. Since the exact position of the tank bottom must be known
for this process, it is advisable when using the FTB to determine the tank height automatically with an empty
tank, using Fct. 3.5.1.
Conversion table/Volume table
Page 16 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
A table consisting of a maximum of 50 points can be stored in the BM 702 for non-linear or linear conversion of
the level, e.g. into a volumetric value. This table, however, can only be programmed with the PC-CAT program
(Fct. 3.7.2).
Page 17 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Sequence for setting parameters (example) (for version with local display)
The following description refers to a storage tank with the parameter examples taken from the illustration in this
Section. If the device no longer contains the default parameters, the keystroke combination for entering the
numerical values may differ.
Activity
Entry into configuration menu
Setting the parameter: tank height
Display of default value
Input of tank height "5.30 m"
Confirm tank height and move to
Display default value
Enter block distance "0.60 m"
Confirm block distance and move
Move to lower range value
Display default value
Enter lower range value (0.4 m = 4
Confirm lower range value and
Display of default value
Enter full-scale value (4.0 m = 20
Keys to be
→
↑ ↑ → →
→
→↓ → 5x↑
↵ ↑
→
→ ↑
↵ ↵ ↑ ↑
→ ↑ ↑
→
3x → 4x↑
↵ ↑
→
2x→ ↓ → 4x
Content of BM 702
Fct. 1.0
Fct. 3.1.1
10.000 m
05.300 m
Fct. 3.1.2
0.5000 m
0.6000 m
Fct. 3.3
Fct. 3.3.3
+ 00.000 m
+ 00.400 m
Fct. 3.3.4
010.00 m
004.00 m
Confirm full-scale value and move
Select: re-record empty spectrum
Store changed parameters
Confirm and select: averaging
Confirm and start recording; then
Confirm and move to tank type
Display of default value
Select tank type "storage tank"
Return to measurement function
with confirmation of changed
parameters
↵ ↵ ↑ ↑ → ↑
→ ↑ ↑
↵
↵ ↑
↵ ↵
↵ 7x↑
→
↑ ↑
5x↵
Fct. 3.5.2
RECORD
ACCEPT. YES
AVERAGE
READY
Fct. 3.5.9
PROC TANK
STORAGE T.
PARAM.CHECK,
then START,
then meas.val.
Page 18 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Maintenance, error handling
Replacement of the signal converter
Before commencing, note the parameters of the BM 702 and switch off the power supply!
1. Disconnect all cables from the terminals in the terminal compartment.
2. Remove the 4 Allen screws M (Allen key size 5 mm) and lift off the signal converter. The flange unit (incl.
waveguide window) will remain tight even with pressurized tanks.
Caution
On pressurized tanks, do not on any account remove the 4 screws H
connecting the waveguide window to the BM 702 flange! DANGER!
3. Fit the new BM 702 converter.
4. Reconnect all cables in the
terminal compartment, as
described in Section 3.
5. Check against the enclosed
report on settings whether the
factory-set parameters are
correct for your application. If
not, reset.
6. Record the empty spectrum,
see Section 4.
Important: Make sure that the
screw thread of the covers on the
terminal and electronic
compartments is well greased at all
times.
signal converter
distance piece
(for hightemperature
version up to 250°C (482°F)
H
BM70
connecting flange
M
O-ring
Returning a BM 702
The party returning a device is obligated to check and ensure that all cavities in the device are free from
dangerous substances (toxic, caustic, flammable, water-endangering), and that a certificate is enclosed with the
device confirming that it is safe to handle.
Error display during measurement (only for versions with local display)
When function 3.2.5 "ERROR. MSG." is set to YES, any error occurring during measurement is indicated in the
display and alternates with the measured value for as long as the error is present.
In addition, all errors are stored. Press the keystroke combination ↵ ↑ → → to get into the error list. You can
page through the list with key → , and acknowledge the errors at the end - if required - by "QUIT YES". Press
key ↵ twice to return to the measuring mode.
Fatal errors (FATAL ERROR), that are detected when the device is started up, render operation of the BM 702
impossible.
Page 19 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Safety information
Hazardous-duty systems
i
• Types of protection in the BM 702 terminal compartment:
Intrinsically safe"ia"
• Consult the relevant wiring and installation regulations, e.g. VDE
0165, before mounting, dismantling or making electrical
connections in a hazardous area
Temperature rating of connecting cables:
The temperature rating of connecting cables is dependent on the maximum temperature of the flange:
Version Max. flange
i
Without high temperature
distance piece > 100 °C (212°F) 80 °C (176°F)
With high temperature
distance piece > 200 °C (212°F) 80 °C (176°F)
temperature
≤ 100 °C (212°F)
≤ 200 °C (212°F)
Cable temperature
70 °C (158°F)
70 °C (158°F)
rating
Page 20 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Technical data (extract)
Tank height (measuring range) 0.5 to 20 m / 1.6 to 65.6 ft
Measuring accuracy (distance) from 1m/3ft: + 1cm/0.4” ; from 5m/16ft: + 0.2%
Measured-value resolution 1 mm / 0.04”
Rate of change in level max. 10 m/min / 32.8 ft/min (tracking speed)
Connecting flanges
Horn antenna/Wave-Guide DIN 2501 DN 50 to DN 200 / PN 6 to PN 64 and
higher;
Shape C to DIN 2526 or others
ANSI B16.5 2” to 8",
Class 150 lb or 300 lb, RF
Wave-Stick Only DN 50...150 or ANSI 2”...6”, dairy DIN11851
DN50/65/80, Tri-Clamp 2/3/4”, SMS 51/63/76
mm, G 1½"
Max. allowable operating pressure -1 bar (vacuum) to max. 64 bar / 928 psig, depending on version
and flange pressure rating. (see name plate)
LP flange system with horn antenna, Wave-Guide or Wave-Stick without flange plate
-1 bar (vacuum) to +2 bar /29 psig
V96 flange system with horn antenna or Wave-Guide:
Connection:
Flange rated pressure
nominal dia.
PN 16 PN 25 PN 40 PN 64
DN inches bar psig bar psig bar psig bar psig
80 3 16 232 --- --- 40 580 64 928
100 4 16 232 --- --150 6 16 232 --- --200 8 16 232 25 362
38 551 55 797
34 493 47 681
32 464 45 652
Wave-Stick: max. 16 bar / 232 psig, temperature-dependent:
[psig] [bar]
+16
+232
pressure
+14
-14
+1
-1
-20 +150+100
temperature T
+212 +302°F
46 - 0.3·T[°C] bar
745 - 2.42·T[°F] psig
Page 21 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Operating temperature at flange LP flange system: - 20 °C (-4°F) to + 130°C (302°F)
(see also chapter 8) V96 flange system:
Basic version: - 30 °C (-22°F) to + 130 °C (266°F)
Special version: min. - 60°C (-76°F)
High temperature version, FFKM:
max. +250°C (482°F)
Kalrez 2035: max. +210°C (410°F)
FPM (Viton) or FEP-coated: max. +200°C (392°F)
PTFE-Wave-Stick: -20°C (-4°F) to + 150°C (302°F),
pressure dependent
PP-Wave-Stick: -20°C (-4°F)to + 100°C (212°F)
Product temperature Unrestricted, provided ambient temperature and flange
temperature are within the specified limits
Ambient temperature Signal converter (Tamb): - 40°C (-4°F) to + 55°C (131°F)
Microwaves
Measuring principle FMCW Radar
Frequency range X-Band 8.5 - 9.9 GHz
Antenna radiation angle Type 3: ± 8° Type 4: ± 6° Wave-Stick: ± 9°
Ex-i current output HART® (passive)
Current 4 - 20 mA; without or with error message 3.6 mA
or 22 mA
Accuracy and linearity 0.15 %; TC=100 ppm/K
clamp voltage > 17V (I = 4 mA); > 13V (I = 20 mA)
Digital communication HART®
Ambient conditions
Environment class Locations exposed direct to open-air climate,
D1 Severity in conformity with EN 60654-1
Protection category (converter) IP66 / IP67 (equivalent to NEMA 4 and 4X)
Electrical connection
Cable entries: 1 x M20×1.5
(delivered with 1 cable gland M20 mm or
QUICKON® 2-pole cutter clamp)
Terminals: Cable cross-section 0.5-1.5 mm² (AWG20-16)
U-clamp terminals (for PA and FE) cable cross-section max. 4 mm² (AWG 12)
Page 22 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
BM 702 Level-Radar Type code
Series V96 or LP: Series WS:
Terminal cover
Name plate
Flange system
High temperature distance piece
(optional)
xxx
xxx
Marking
Flange plating
(for Hastelloy)
Marking
Material "Metaglass" ring
(not for LP version)
Marking
Flange material
Flange plating
(for Hastelloy, Ti, Ta)
Marking of the signal converter (see name plate):
BM 702 non-Ex version for non-hazardous areas
BM 702i / EEx Ex version for hazardous areas,
terminal compartment in Increased Safety „ia“
Terminal cover
Stick
(LPTFE/PTFE/PP)
xxx
Name plate
Flange system
Marking
Flange material
optional: flange plate
(Vers. LPTFE/PTFE)
optional: antenna
(LP horn antenna)
Marking of the Flange systems (see name plate on flange):
..(1).. ....(2)...... non-Ex version for non-hazardous areas
..(1).. ....(2)...... – E Ex ..(3)..Ex version for hazardous areas
(1) Series
V96 Flange system V96
(with „Metaglass“ as versions with horn antenna or Wave-Guide)
WS Wave-Stick
(plastics rod antenna or short stick for still wells)
EA Enamel antenna
LP LP version
(with horn antenna or Wave-Guide)
(2) Materials of the parts in contact with the product
- Series V96:
» Antennas and flanges:
SS Flange and antenna of stainless steel
used material: see marking on flange
HB Flange plating and antenna of Hastelloy B (e.g. B2)
used material: see marking on plating
HC Flange plating and antenna of Hastelloy C (e.g. C4 or C22)
used material: see marking on plating
Ti Flange plating and antenna of Titanium
Ta Flange plating and antenna of Tantalum
Mo Flange plating and antenna of Monel
» gasket material:
FFKM Gaskets of FFKM, e.g. Kalrez™ 4079 or Parofluor™ V8545-75
K2035 Gaskets of Kalrez™ 2035
K1091 Gaskets of Kalrez™ 1091
FPM Gaskets of FPM, e.g. Viton™
FEP Gaskets FEP-coated (FPM core)
Page 23 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
- Series WS
LPTFE Stick and flange plate of conductive PTFE
PTFE Stick and flange plate of PTFE
SS PTFE stainless steel PTFE, gasket of FFKM
also for version „LP horn antenna“
SS PP stainless steel PP, gasket of FPM (Viton™)
- Series EA
EM PTFE Antenna of enamel, sealing of PTFE
(3) Application conditions, equipment group II
(explosive atmosphere by gases, vapours, mists)
1G equipment category 1, application in Zone 0
(versions V96, EA, or Wave-Stick LPTFE or PTFE with Metaglass)
2G equipment category 2, application in Zone 1
(Wave-Stick PP or PTFE without Metaglass, or LP flange system)
(free)Without Ex approval (e.g. LP version)
Limits of temperature at flange:
Version Minimum flange temperature Maximum flange temperature
i
(1)+(2) of the
type code
V96 ...
FFKM
V96 ...
K2035
V96 ... FPM - 30 °C (-
V96 ... FEP - 30 °C (-
WS LPTFE - 40 °C (-
WS PTFE - 40 °C (-
WS SS PTFE - 20 °C (-
WS SS PP - 20 °C (-
LP - 20 °C (-
Standard
version
- 30 °C (22°F)
- 30 °C (22°F)
22°F)
22°F)
40°F)
40°F)
4°F)
4°F)
4°F)
Special version
with marking
„2.4610“ at the
Metaglass ring
- 60 °C (-76°F) +130°C
- 60 °C (-76°F) +130°C
- 60 °C (-76°F) +130°C
- 60 °C (-76°F) +130°C
––– +130°C
––– +130°C
––– +130°C
––– + 100°C
––– +130°C
Without high
temperature
distance piece
(+266°F)
(+266°F)
(+266°F)
(+266°F)
(+266°F)
(+266°F)
(+266°F)
(+212°F)
(+266°F)
With high
temperature
distance piece
+250°C
(+482°F)
+210°C
(+410°F)
+200°C
(+392°F)
+200°C
(+392°F)
+150°C
(+302°F)
+150°C
(+302°F)
+150°C
(+302°F)
+100°C
(+212°F)
–––
Page 24 of 25
FCC Application for Krohne America, Inc. ••FCC ID: JH5BM702 •• Report No. EA0897-1
User’s Manual________________________________________________________ 6-Oct-00
Parameter check list
BM 702.............................. ...........................Vers.: device no.................
Menu modified at................................: .............. :............... :............... :
Fct. Configuration parameters (extract)
3.1.1 Tank height ...............................: .............. :...............:............... :
3.1.2 Block distance...........................: .............. :............... :...............:
3.1.3 Antenna.....................................: .............. :............... :...............:
3.1.4 Antenna extension.....................: .............. :............... :............... :
3.1.5 Distance piece...........................: .............. :...............:...............:
3.1.6 Stillwell / diameter....................: .............. :............... :...............:
3.1.7 Reference offset........................: .............. :............... :...............:
3.1.8 Tank bottom..............................: .............. :............... :...............:
3.3.1 Current output, function offset..: .............. :............... :...............:
3.3.2 Current output range/error ........: .............. :............... :............... :
3.3.3 Min. current scale .....................: .............. :............... :...............:
3.5.2 Empty spectrum........................: .............. :............... :...............:
3.5.3 Time constant............................: .............. :............... :...............:
3.5.4 Tracking speed..........................: .............. :............... :...............:
3.5.5 Multiple reflections (yes/no).....: .............. :............... :...............:
3.5.6 Block distance ident (yes/no)....: .............. :............... :...............:
3.5.7 Function FTB............................: .............. :............... :...............:
3.5.8 Epsilon R ..................................: .............. :............... :...............:
3.5.9 Tank type ..................................: .............. :...............:...............:
Page 25 of 25
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