KROHNE BM702 Users Manual
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
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