KROHNE BM700 User Manual
©
KROHNE
7.02226.31.00
Status: 06-1999
Installation and operating
instructions
Level-Radar
BM 700
Variable area flowmeters
Vortex flowmeters
Flow controllers
Electromagnetic flowmeters
Ultrasonic flowmeters
Mass flowmeters
Level measuring instruments
Communications technology
Engineering systems & solutions
Software History
Intro-
duction
Signal converter User program Instructions
Mth./Yr Hardware Firmware Hardware Operating-
system
04/98 BM 700
Test versions for BM 700.
10/98 BM 700 5.01 PC DOS 5.0
First serial version for BM 700.
5.00PREnn
5.01PRE01
PC DOS 5.0
and higher
and higher
Software Device User
PC-CAT
3.00
PREnn
PC-CAT
3.00
Suppl.
instruction
to BM 70A
10/98 7.02221.11
program
7.02221.11
+ Suppl.
instruction
+ Suppl.
instruction
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
• Bar magnet for operator control (only for version with local display)
• Wrench for covers
Installation material (stud bolts, flange gasket and cabling) not supplied, to be
provided by customer!
Page 2 BM 700 Installation and Operating Instructions
Contents:
page
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 16
6 Safety information 17
7 Technical data (extract) 18
8 BM 700 Level-Radar Type code 19
9 Parameter check list BM 700 21
Appendix 22
Product liability and warranty:
The BM 700 level gauge is designed solely for measuring the level, distance, volume
and reflection of liquids, pastes, slurries, particulate materials and solids.
The BM 700 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
1 Handling and storage
Safety advice
Depending on the version, the device will weigh between approx. 10 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 700, 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.
BM 700 Installation and Operating Instructions Page 3
2 Installation
Most of the BM 700 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.
2.1 Field assembly
• For any necessary field assembly of the
BM 700, 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 700. Torque for the sets of 4 Allen
screws M (key size 5 mm): max. 8 Nm ∼
0.8 kpm (5.8 ft lbf).
• Note: Ensure the upper Teflon plug is kept
absolutely dry and clean! Moisture and dirt
will impair functionability of the BM 700!
signal converter
distance piece (for
high-temperature version
up to 250°C (482 °F)
H
BM70 A
connecting flange
antenna extension
O-ring
upper Teflon plug
O-ring
lower Teflon plug
M
M
• 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 !
Versions:
BM 700
converter
blind
Stick
Flange
plate
Gasket
Stick
BM 700
converter
with Display
High temperature
distance piece
(optional)
Horn
antenna
Gasket
antenna
Horn
antenna
A
Separation
(Metaglass)
Flange
plating
(for Hastelloy,
Ti, Ta)
Wave-Stick
PTFE
Page 4 BM 700 Installation and Operating Instructions
Wave-Stick
w/o plate
(PP or PTFE)
max. 2 bar
max. 2 bar (29 psig)
LP flange system
max. 2 bar (29 psig)
max. 2 bar
with horn antenna
Flange system 96
with horn antenna
2.2 Mechanical installation
Hazardous-duty systems:
• The BM 700 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:
• Surface temperature: The housing of the signal converter can, in extreme
ambient conditions, have a temperature of more than 70°C (158°F)!
• 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
still wells
dia. 40...55 mm
(1.57" to 2.17")
e.g. DN50 (2")
tank nozzle
min. 50 mm
min. 235 mm
BM 700 Installation and Operating Instructions Page 5
c) Purging device
Do not forget the gasket when
positioning the BM 700 on the tank
nozzle flange. Align BM 700 and gasket,
slightly tighten nuts on stud bolts (by
in the gap
700 flanges and
(both
must fit closely and
Tighten down stud bolt nuts firmly. The
dependent upon the
strength properties of the stud bolts and
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)!
Installation on the tank
•
hand).
• Press shielding strip C*
between tank and BM
secure with strap retainer S*
items included with supply).
• Strap retainer S*
overlap both flanges.
* only required for European radio approvals
•
tightening torque is
the pressure rating of the tank.
Positioning on the tank
C* = shielding strip B = BM 700 flange
S* = strap retainer F = tank flange
>1/7×H, but max. 1/3×D
D
H
Recommended distance Do not position in Do not position
from the tank wall tank centreline! above internals!
(multiple reflections!) (interference reflections!)
A Stilling well or Wave-Guide may be mounted in any position on the tank!
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!
Page 6 BM 700 Installation and Operating Instructions
3 Electrical connection
BM 700 (max. 5 instruments)
BM 700 (max. 5 instruments)
To open the terminal compartment of the signal converter, first open the safety lock
with an Allen key (size: 4 mm) and then use the enclosed special wrench to turn the
cover anticlockwise.
Supply power
Variant Voltage range Recommended fuse protection
24 V DCAC
Terminal assignment
Supply power:
Terminal compartment BM 700: External power supply "FEAS, type PSLC242":
19.2 - 28.8 V DC or
20.4 - 26.4 V AC
min. T 0.5 A
230 V AC
L1L1 N N3 4
1 2
Current
output
32 31
-
+
L1L1 N N3 4
+
Power supply
24 V DC (+/-20%)
or
24 V AC (+10/-15%)
< 300 mA
max.350 Ω
Class of protection
The BM 700 level gauge is designed for safety class 1 in conformity with VDE 0106
Part 1.
24 V DCAC supply
When connected to a “functional extra-low voltage with safety separation“ power
source (SELV or PELV) in accordance with VDE 0100, Part 410 or equivalent
(inter)national regulations, connection of a safety conductor (PE) is not required.
Equipotential bonding
When used in hazardous areas, the BM 700 Ex must be incorporated in the PA
equipotential bonding system , irrespective of the type of power supply! If the PA is
connected via a separate conductor, this must be connected to the separate U-clamp
terminal at the “neck“ of the BM 700 Ex. Cancellation of equipotential bonding is only
permitted when the BM 700 is disconnected from supply.
Rated temperature of connecting cables: see Section 6.
4-20mA
-
+ +
Power supply galvanically insulated according to VDE 0551
Dimensions (W×H×D): 55×75×110 mm, usable for rail
mounting
- -
+ +
115 V AC
- -
BM 700 Installation and Operating Instructions Page 7
4 Setting the parameters
Setting parameters via program PC-CAT
RS232
Adapter
≥ 120 Ω
With the program PC-CAT, version 3.00 or higher, you can configurate BM 700
instruments in a very comfortable way form a PC. Connect the current output of
BM 700 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.
Local display (optional)
• Numeric display, measured values
‚ Alphanumeric display, function/unit
ƒ Max. 6 markers to display measurement
status
„ 3 keys for configuration and error
interrogation
… Magnetic sensors for operator control
through the closed housing (function
same as the 3 keys)
† Compass field, indicates actuation of a
key
Page 8 BM 700 Installation and Operating Instructions
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