KROHNE Optiwave 6500 C Specifications

Technical Datasheet

Technical Datasheet

OPTIWAVE 6500 C

OPTIWAVE 6500 C

OPTIWAVE 6500 COPTIWAVE 6500 C

Technical DatasheetTechnical Datasheet

80 GHz Radar (FMCW) Level Transmitter for powders
and dusty atmosphere

•

Flush-mounted PEEK Lens antenna hence no intrusion into tank

•

Extremely high dynamics for reliable measurement despite dusty conditions

•

Easy installation due to small beam angles

© KROHNE 04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

CONTENTS

OPTIWAVE 6500 C

1 Product features 3

1.1 The FMCW radar level transmitter for powders and dusty atmosphere ........................ 3

1.2 Applications ...................................................................................................................... 4

1.3 Product family .................................................................................................................. 5

1.4 Measuring principle.......................................................................................................... 9

2 Technical data 10

2.1 Technical data................................................................................................................. 10

2.2 Minimum power supply voltage ..................................................................................... 15

2.3 Measuring accuracy ....................................................................................................... 15

2.4 Guidelines for maximum operating pressure................................................................ 18

2.5 Dimensions and weights ................................................................................................ 20

3 Installation 25

3.1 Intended use ................................................................................................................... 25

3.2 Pre-installation requirements ....................................................................................... 25

3.3 Installation...................................................................................................................... 26

3.3.1 Pressure and temperature ranges....................................................................................... 26

3.3.2 Recommended mounting position........................................................................................ 27

3.3.3 Mounting restrictions............................................................................................................ 28

3.3.4 Process connections............................................................................................................. 29

4 Electrical connections 31

4.1 Electrical installation: 2-wire, loop-powered ................................................................ 31

4.2 Non-Ex devices............................................................................................................... 31

4.3 Devices for hazardous locations .................................................................................... 31

4.4 Networks ........................................................................................................................ 32

4.4.1 General information.............................................................................................................. 32

4.4.2 Point-to-point connection..................................................................................................... 32

4.4.3 Multi-drop networks ............................................................................................................. 33

5 Order information 34

5.1 Order code ...................................................................................................................... 34

6 Notes 39

2

www.krohne.com 04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

OPTIWAVE 6500 C

PRODUCT FEATURES

1.1 The FMCW radar level transmitter for powders and dusty atmosphere

This device is a non-contact radar level transmitter that uses FMCW technology. It measures
distance, level and volume of powders, granulates and other solids. It is ideal for measuring the
level of solids in applications with very dusty atmospheres.

1

1 Aluminium or stainless steel housing
2 Large, backlit LCD screen with 4-button keypad can be used with a bar magnet without opening the housing cover. The

software has a quick setup assistant for easy commissioning. 12 languages are available.

3 2-wire 80 GHz FMCW radar level transmitter
4 PEEK Lens antenna design

Highlights

• KROHNE is the pioneer of FMCW radar level measurement and has more than 28 years of
experience with this technology

• 2-wire loop-powered 80 GHz transmitter – HART® 7

• Accuracy: ±2mm/ ±0.08¨

• PEEK Lens antenna options include:

- DN70 / 2¾¨ antenna with 4° beam angle suitable for long nozzles and distances up to
100 m / 328 ft

- DN40 / 1½¨ antenna with 8° beam angle, available with 1½¨ thread connections, measures
up to 30 m / 98 ft

- 112 mm / 4.4¨ antenna extension for long nozzles

• Antenna purging system for flange connection without antenna extension

• Extensive choice of process connections (threaded ≥1½¨ and flange ≥DN50 / 2¨)

• One user interface for all applications

• Empty tank spectrum function eliminates false reflections caused by tank internals

• Extensive choice of process connections (threaded ≥1½¨ and flange ≥DN50 / 2¨)

• Extremely high dynamics with considerable signal-to-noise ratio for clear vision in dusty

atmospheres

• 4 GHz sweep for high resolution

• Low-cost low-pressure disc flange

www.krohne.com04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

3

1

PRODUCT FEATURES

• No need for antenna aiming kits. A slanted flange can be installed if necessary.

Industries

• Metals, Minerals & Mining

• Chemical market

• Power

• Agri-food

• Wastewater

• Pulp & Paper

Applications

• High and narrow silos

• Buffer silos

• Bulk storage containers or hoppers

1.2 Applications

OPTIWAVE 6500 C

1. Level measurement of solids

2. Mass (volume) measurement

The level transmitter can measure the level of a
wide range of solid products on a large variety of
installations within the stated pressure and
temperature range. It does not require any
calibration: it is only necessary to do a short
configuration procedure.

A strapping table function is available in the
configuration menu for volume or mass
measurement. Up to 50 mass (volume) values can be
related to level values. For example:
Level 1= 2 m / Mass 1= e.g. 100 kg
Level 2= 10 m / Mass 2= e.g. 500 kg
Level 3= 20 m / Mass 3= e.g. 1000 kg

This data permits the device to calculate (by linear
interpolation) volume or mass between strapping
table entries.

PACTware™ software and a DTM (Device Type
Manager) is supplied free of charge with the device.
This software permits the user to easily configure
the device with a computer. It has a conversion table
function with a large number of tank shapes.

4

www.krohne.com 04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

OPTIWAVE 6500 C

1.3 Product family

OPTIWAVE 1010 (6 GHz)
for liquids in bypass chambers

PRODUCT FEATURES

The OPTIWAVE 1010 is a non-contact FMCW radar
welded to a bypass chamber with an optional IP68
level indicator (BM 26 Advanced). It continuously
measures the distance and level of clean liquids.

It measures in bypass chambers up to 8 m / 26.2 ft
high with a maximum accuracy of ±5mm/ ±0.2¨. It
can measure in process conditions with
temperatures up to +150°C / +302°F and pressures
up to 40 barg / 580 psig.

1

OPTIWAVE 5200 C/F (10 GHz)
for liquids in storage and process applications

This 10 GHz 2-wire FMCW radar level transmitter
measures distance, level, volume, mass and flow
rate of liquids and pastes. It is ideal for corrosive
products with its PP or PTFE antenna options. It
features unique PP and PTFE antennas for
aggressive products. The device is able to measure
distances up 30 m / 98.4 ft in process conditions up
to +250°C / +482°F and 40 barg / 580psig.

The device agrees with SIL2 requirements for
safety-related systems (as per IEC 61508). Output
options include HART®, FOUNDATION™ fieldbus
and PROFIBUS PA industrial communication
protocols.

www.krohne.com04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

5

1

PRODUCT FEATURES

OPTIWAVE 5400 C (24 GHz)
for liquids in basic process applications

OPTIWAVE 6500 C

Designed for basic liquid applications, this market
entry 24 GHz 2-wire FMCW radar transmitter
provides accurate readings even in fast moving
processes, in closed tanks or in the open air like
rivers or dams. Its proven PP Drop antenna is
insensitive to condensation.

The OPTIWAVE 5400 can measure in process
conditions with temperatures up to +130°C / +266°F
and pressures up to 16 barg / 232 psig. The antenna
options permit to measure distances up to 100 m /
328 ft. The device can be installed in high nozzles
(≤1 m / 3.28 ft) when it is fitted with antenna
extensions.

OPTIWAVE 7400 C (24GHz)
for agitated and corrosive liquids

This 24 GHz FMCW radar level transmitter is
designed for liquids in harsh environment like tanks
with agitators containing corrosives or in non-Ex
applications with extremely high process
temperatures, like molten salt in solar plants
(+700°C / +1292°F). For toxic and dangerous
products, the use of a Metaglas® second sealing
barrier is recommended.

The PTFE and PEEK Drop antennas have optional
flange plate protection for corrosive media. Heating
and cooling systems prevent from crystallization
inside the Metallic Horn antennas. The device
measures distances up to 100 m / 328 ft and can be
installed in high nozzles (≤1 m / 3.28 ft) when fitted
with antenna extensions. Standard process
conditions up to +200°C / 392°F; 100 barg / 1450 psig
(higher on request).

6

www.krohne.com 04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

OPTIWAVE 6500 C

OPTIWAVE 7500 C (80 GHz)
for liquids in narrow tanks with internal obstructions

The small beam angle and negligible dead zone of
this 80 GHz FMCW radar level transmitter makes it
the premium choice for liquids in small and narrow
tanks with internal obstructions like agitators or
heating coils, as well as tanks with long nozzles. It
can even measure through tank roofs made of non­conductive material (e.g. plastic, fiberglass or
glass). The flush-mounted PEEK Lens antenna (no
tank intrusion) is insensitive to deposit.

There is an extensive choice of process connections
starting
plate protection for corrosive tank contents. The
OPTIWAVE 7500 operates in process conditions with
temperatures up to +150°C / +302°F and pressures
up to 40 barg / 580 psig. It measures distances up to
100 m / 328 ft and a 112 mm / 4.4¨ extension is
available for high nozzles.

PRODUCT FEATURES

from ¾¨. Flanges have an optional PEEK

1

OPTIWAVE 3500 C (80 GHz)
for liquids with hygienic requirements

This 80 GHz FMCW radar transmitter for hygienic
liquid applications in the pharmaceutical, food and
beverage industries is CIP-SIP suitable and offers a
large choice of hygienic process connections:
Tri-Clamp®, Tuchenhagen VARIVENT®, SMS,
DIN 11851, DIN 11864-1 Form A, NEUMO
BioControl®.

The small dead zone and beam angle of its
flush-mounted Lens antenna enables precise
measurement even in small and narrow tanks with
agitators. The OPTIWAVE 3500 measures up to
50 m / 164 ft in process conditions up to +150°C/
+302°F and 25 barg / 363 psig.

www.krohne.com04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

7

1

PRODUCT FEATURES

OPTIWAVE 6400 C (24 GHz)
for solids from granulates to rocks

OPTIWAVE 6500 C

By combining high signal dynamics and FMCW radar
technology, this market-entry 24 GHz radar device
measures accurately and reliably the level of solids
like stone, plastic granulates or coffee beans. No
need for expensive antenna aiming kits or purging
systems; the proven Drop antenna design minimizes
scaling and is not affected by the angle of repose.

It operates in process conditions with temperatures
up to +130°C / +266°F and pressures up to 16 barg /
232 psig. The antenna options permit the device to
measure distances up to 100 m / 328 ft.

OPTIWAVE 6500 C (80 GHz)
for powders and dusty atmosphere

Accurate continuous level measurement of fine
powders has to deal with a series of issues like dust,
low-reflective media, build-up and uneven surfaces.
The specific algorithms and high signal dynamics of
this 80 GHz FMCW radar transmitter are the key to
provide reliable and accurate readings despite these
difficult conditions. Thanks to the small beam angle
of the flush-mounted Lens antenna, this powerful
device handles high and narrow silos even in the
presence of internal obstructions.

The OPTIWAVE 6500 operates in process conditions
with temperatures up to +200°C / +392°F and
pressures up to 40 barg / 580 psig. It offers an
extensive choice of threaded (≥1½¨) and flanged
(≥DN50 / 2¨) process connections. The antenna
options permit the device to measure distances up to
100 m / 328 ft. A 112 mm / 4.4¨ extension is available
for high nozzles.

8

www.krohne.com 04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

OPTIWAVE 6500 C

1.4 Measuring principle

A radar signal is emitted via an antenna, reflected from the product surface and received after a
time t. The radar principle used is FMCW (Frequency Modulated Continuous Wave).

The FMCW-radar transmits a high frequency signal whose frequency increases linearly during
the measurement phase (called the frequency sweep). The signal is emitted, reflected on the
measuring surface and received with a time delay, t. Delay time, t=2d/c, where d is the distance
to the product surface and c is the speed of light in the gas above the product.

For further signal processing the difference Δf is calculated from the actual transmitted
frequency and the received frequency. The difference is directly proportional to the distance. A
large frequency difference corresponds to a large distance and vice versa. The frequency
difference Δf is transformed via a Fast Fourier Transform (FFT) into a frequency spectrum and
then the distance is calculated from the spectrum. The level results from the difference between
the tank height and the measured distance.

PRODUCT FEATURES

1

Figure 1-1: Measuring principle of FMCW radar

1 Transmitter
2 Mixer
3 Antenna
4 Distance to product surface, where change in frequency is proportional to distance
5 Differential time delay, Δt
6 Differential frequency, Δf
7 Frequency transmitted
8 Frequency received
9 Frequency
10 Time

Measurement modes

"Direct" mode

"Direct" mode

"Direct" mode"Direct" mode
The device uses the largest radar signal to monitor level.

"Direct Plus" mode

"Direct Plus" mode

"Direct Plus" mode"Direct Plus" mode
If it is possible there will be an interference signal in the measurement zone that is larger than
the level signal, select "Direct Plus" mode. If you select "Direct Plus" mode, the device locks on
the level signal and monitors changes in level. If the device then finds larger reflections in the
silo, it will only monitor the largest signal in a small search zone around the first reflection found
and ignore all other reflections. The interference signal must not be near to the level signal.

www.krohne.com04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

9

2

TECHNICAL DATA

OPTIWAVE 6500 C

2.1 Technical data

•

The following data is provided for general applications. If you require data that is more
relevant to your specific application, please contact us or your local sales office.

•

Additional information (certificates, special tools, software,...) and complete product
documentation can be downloaded free of charge from the website (Downloadcenter).

Measuring system

Measuring principle 2-wire loop-powered level transmitter; FMCW radar

Frequency range W-band (78...82 GHz)

Max. radiated power (EIRP) < -41.3 dBm according to ETSI EN 307 372 (TLPR) and ETSI EN 302 729 (LPR)

Application range Level measurement of powders and granulates

Primary measured value Distance and reflection

Secondary measured value Level, volume and mass

Design

Construction The measurement system consists of a measuring sensor (antenna) and a signal

Options Integrated LCD display (-20..+70°C/ -4…+158°F); if the ambient temperature is not

Max. measuring range Lens, DN40 (1½¨): 50 m / 164 ft

Min. tank height 1m/ 40¨

Recommended minimum
blocking distance

Beam angle
(antenna)

Display and user interface

Display and user interface

Display and user interfaceDisplay and user interface

Display Backlit LCD display

Interface languages English, French, German, Italian, Spanish, Portuguese, Chinese (simplified),

converter

in these limits, then this condition can stop the display

Distance piece (for process temperature: +150...+200°C / +302...+392°F)

Weather protection

Lens, DN70 (2¾¨): 100 m / 328.1 ft

Refer also to "Measuring accuracy" on page 15

0.3 m / 12¨ (add 112 mm / 4.4¨ if the DN40 Lens antenna has antenna extension)

Lens, DN40 (1½¨): 8°

Lens, DN70 (2¾¨): 4°

128 × 64 pixels in 64-step greyscale with 4-button keypad

Japanese, Russian, Czech, Polish and Turkish

Measuring accuracy

Resolution 1mm/ 0.04¨

Repeatability ±1mm/ ±0.04¨

Accuracy Standard: ±2mm/ ±0.8¨, when distance ≤ 10 m / 33 ft;

Digital temperature drift Max. ±10 mm / ±0.39¨ for the full temperature range

10

±0.02% of measured distance, when distance > 10 m / 33 ft. For more data, refer to

Measuring accuracy

on page 15.

www.krohne.com 04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

OPTIWAVE 6500 C

Reference conditions acc. to EN 61298-1

Reference conditions acc. to EN 61298-1

Reference conditions acc. to EN 61298-1Reference conditions acc. to EN 61298-1

Temperature +15...+25°C / +59...+77°F

Pressure 1013 mbara ±50 mbar / 14.69 psia ±0.73 psi

Relative air humidity 60% ±15%

Target Metal plate in an anechoic chamber. The device has specified settings.

TECHNICAL DATA

Operating conditions

Temperature

Temperature

TemperatureTemperature

Ambient temperature -40…+80°C/ -40…+176°F

Relative humidity 0...99%

Storage temperature -40…+85°C/ -40…+185°F

Process connection temperature
(higher temperature on request)

Pressure

Pressure

PressurePressure

Process pressure -1…40 barg / -14.5…580 psig

Other conditions

Other conditions

Other conditionsOther conditions

Dielectric constant (εr) ≥1.4

Ingress protection IEC 60529: IP66 / IP68 (0.1 barg / 1.45 psig)

Maximum rate of change 60 m/min / 196 ft/min

Ex: see supplementary operating instructions or approval certificates

-50…+150°C/ -58…+302°F
The process connection temperature must agree with the temperature limits of the
gasket material. Refer to "Materials" in this table.)
Ex: see supplementary operating instructions or approval certificates

Subject to the process connection used and the process connection temperature.
For more data, refer to

NEMA 250: NEMA type 6 - 6P (housing) and type 6P (antenna)

Guidelines for maximum operating pressure

2

on page 18.

Installation conditions

Process connection size The nominal diameter (DN) should be equal to or larger than the antenna diameter.

Process connection position Make sure that there are not any obstructions directly below the process

Dimensions and weights For dimensions and weights data, refer to

connection for the device. For more data, refer to

Dimensions and weights

Installation

on page 25.

on page 20.

Materials

Housing Standard: Polyester-coated aluminium

Option: Stainless steel (1.4404 / 316L) – non-Ex devices only. Ex approvals will be
available in the second quarter of 2018.

Wetted parts, including antenna PEEK – this material agrees with FDA regulations

Process connection Stainless steel (1.4404 / 316L)

Slanted flange (option) PTFE (≤ +150°C / +302°F); PEEK (> +150°C / +302°F)

Gaskets (and o-rings for the
sealed antenna extension option)

Cable gland Standard: none

Weather protection (Option) Stainless steel (1.4404 / 316L)

FKM/FPM (-20…+150°C/ -4…+302°F); EPDM (-20°C…+200°C/ -4…+392°F)

Options: Plastic (Non-Ex: black, Ex i-approved: blue); nickel-plated brass; stainless
steel; M12 (4-pin connector)

www.krohne.com04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en

11

2

TECHNICAL DATA

Process connections

DN70 (2

DN70 (2¾¨) Lens antenna

DN70 (2DN70 (2

Thread G1½ A (ISO 228); 1½ NPT (ASME B1.20.1)

Flange, EN 1092-1 Low-pressure flanges: DN50...200 in PN01;

Flange, ASME B16.5 Low-pressure flanges: 2¨...8¨ in 150 lb (max. 15 psig);

DN70 (2

DN70 (2¾¨) Lens antenna

DN70 (2DN70 (2

Thread G3 A (ISO 228); 3 NPT (ASME B1.20.1)

Flange, EN 1092-1 Low-pressure flanges: DN80...200 in PN01;

Flange, ASME B16.5 Low-pressure flanges: 3¨...8¨ in 150 lb (max. 15 psig);

) Lens antenna

) Lens antenna) Lens antenna

) Lens antenna

) Lens antenna) Lens antenna

Standard flanges: DN50 in PN40; DN80...200 in PN10, PN16 and PN40 (Type B1);
others on request
Optional flange facing: Type A

Standard flanges: 2¨…8¨ in 150 lb RF and 300 lb RF; others on request
Optional flange facing: FF (Flat Face)

Standard flanges: DN80...200 in PN10, PN16 and PN40 (Type B1); others on request
Optional flange facing for standard flanges: Type A

Standard flanges: 3¨…8¨ in 150 lb RF and 300 lb RF; others on request
Optional flange facing for standard flanges: FF (Flat Face)

OPTIWAVE 6500 C

Electrical connections

Power supply Terminals output

Maximum current 21.5 mA

Current output load Non-Ex / Ex i:

Cable entry Standard: M20×1.5; Option: ½ NPT

Cable gland Standard: none

Cable entry capacity (terminal) 0.5…3.31 mm² (AWG 20...12)

Terminals output – Non-Ex / Ex i:

Terminals output Terminals output
12…30 VDC; min./max. value for an output of 21.5 mA at the terminals

Terminals output

Terminals output – Ex d:

Terminals output Terminals output
16…36 VDC; min./max. value for an output of 21.5 mA at the terminals

Non-Ex / Ex i: RL [Ω] ≤ ((U

Non-Ex / Ex i:Non-Ex / Ex i:

power supply voltage

Ex d:

Ex d: RL [Ω] ≤ ((U

Ex d:Ex d:

on page 15.

voltage

Options: M20×1.5 (cable diameter: 7…12 mm / 0.28…0.47¨); others are available on
request

Non-Ex / Ex i:

Non-Ex / Ex i: Non-Ex / Ex i:

Ex d:

Ex d: Ex d:

-12V)/21.5mA). For more data, refer to

ext

on page 15.

-16 V)/21.5 mA). For more data, refer to

ext

Minimum

Minimum power supply

Input and output

Current output

Current output

Current outputCurrent output

Output signal Standard: 4…20 mA

Options: 3.8…20.5 mA acc. to NAMUR NE 43; 4…20 mA (reversed); 3.8…20.5 mA
(reversed) acc. to NAMUR NE 43

Output type Passive

Resolution ±5 µA

Temperature drift Typically 50 ppm/K

Error signal High: 21.5 mA; Low: 3.5 mA acc. to NAMUR NE 43

HART

HART®

HARTHART

Description Digital signal transmitted with the current output signal (HART® protocol)

Version 7.4

Load ≥ 250 Ω

Digital temperature drift Max. ±15 mm / 0.6¨ for the full temperature range

1

12

www.krohne.com 04/2017 - 4005813001 - TD OPTIWAVE 6500 R01 en