Variable area flowmeter

DK48 - DK800 Quick Start

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General safety notes

You can find the newest and/or additional information in the handbook, the datasheet, special manuals, certificates and the download center at www.krohne.com.

Installation, mounting, commissioning, and maintenance can be performed only by trained personnel.

Responsibility for suitability and intended use of this instrument rests solely with the user.

The supplier accepts no liability for inappropriate use by the customer.

Improper installation and operation may lead to loss of warranty. Moreover, the "general terms and conditions" on the back of the bill apply, which form the basis for the sales contract.

If you have to send the device back to the manufacturer or supplier, fill out the form contained on the CD-ROM and enclose it with the device. Unless this form is completely filled out, it will unfortunately not be possible for the manufacturer to perform repair or inspection.

Respect general and local electrical safety requirements.

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Visual check

• Check the delivery for damage.

• Check that the specifications on the nameplate correspond to your order

specifications.

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Scope of delivery

1 Flowmeter in the version ordered2 Manual3 Certificates, calibration report (supplied to order only)

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Permissible temperature ranges

1 max. product temperature see technical data sheet.2 max. storage temperature and ambient temperature

Ambient temp.: Ex devices -20...+60°C, non-Ex devices -20...+65°CStorage temperature: -20...+60°C

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Basic installation instructions

• The variable area flowmeters must be installed vertically (measurement principle). The flow direction must be from bottom to top. For installation recommendations please refer also to VDI/VDE Directive 3513 Sheet 3.

• Before connecting, blow or flush out the pipes leading to the device.• Pipes for gas flow need to be dried before the device is installed.• Use connectors suitable for the particular device version.• Align the pipes axially with the connections on the flowmeter so they are

free of stresses.• If necessary, the piping has to be supported to prevent vibrations being

transmitted to the flowmeter.• Do not lay signal cables directly next to cables for the power supply.

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Start-up

CAUTION!When starting up the device, the following points must be observed:Compare the actual operating pressure and the process temperature of the system with the specifications on the nameplate (PS and TS). The PS and TS must not be exceeded.Make sure materials are compatible.Slowly open needle valve at flowmeter.When measuring liquids, vent the pipes carefully.When measuring gases, increase pressure slowly.Avoid float impact (e.g. caused by solenoid valves), as this is likely to damage the measuring section or float.The top edge of the float marks the reading line for flow values:

1 Reading line2 DK48 - AIII float3 Dk46, DK47, DK800 - Ball float

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Protection category

The flowmeter and limit switches meet all requirements of protection category IP 65.

Therefore it is essential to observe the following points:• Use only original gaskets. They must be clean and free of any damage.

Defective gaskets have to be replaced.

• The electrical cables used must be undamaged and must comply with

regulations.

• The cables must be laid with a loop 3 upstream of the flowmeter to

prevent water from getting into the housing.

• The cable glands 2 must be tightened.

• Close the unused cable glands using blanking plugs 1.

DANGER!After all servicing and maintenance work on the flowmeter, the specified protection category has to be ensured again.

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Electrical connections

Connection DK46 - DK800 - 2-wire limit switchConnection DK46 - DK800 - 2-wire limit switchConnection DK46 - DK800 - 2-wire limit switchConnection DK46 - DK800 - 2-wire limit switch

For connection to an EMC filter, the ground terminal must be connected with the back rail of the flowmeter.

1 Lower limit switch2 Upper limit switch3 Blue cable -4 Brown cable +

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Connection 3-wire limit switchConnection 3-wire limit switchConnection 3-wire limit switchConnection 3-wire limit switch

• bn - brown plus• bk - black switch• bu - blue minus

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Contact

KROHNE MesstechnikKROHNE MesstechnikKROHNE MesstechnikKROHNE MesstechnikLudwig-Krohne-Str. 547058 Duisburg, Germanywww.krohne.com

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