KROHNE H250-RR Specifications

Technical Datasheet

H250 M40

H250 M40H250 M40

Technical DatasheetTechnical Datasheet

Variable area flowmeter

•

Secure, cost-effective measurement and display, even without power supply

•

A device that meets all Ex requirements, worldwide

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Sturdy, closed design for high resistance to pressure, temperature and product

CONTENTS

H250 M40

1 Product features 3

1.1 Intelligent modularity ....................................................................................................... 3

1.2 Options and variants......................................................................................................... 5

1.3 Functional principle.......................................................................................................... 7

2 Technical data 8

2.1 Technical data................................................................................................................... 8

2.2 Dimensions and weight .................................................................................................. 16

2.3 Measuring ranges...........................................................................................................19

3 Installation 27

3.1 Intended use ................................................................................................................... 27

3.2 Installation conditions ....................................................................................................28

3.2.1 Tightening torques................................................................................................................ 30

3.2.2 Magnetic filters ..................................................................................................................... 30

3.2.3 Heat insulation ...................................................................................................................... 31

3.2.4 Float damping ....................................................................................................................... 32

3.2.5 Pointer damping.................................................................................................................... 32

4 Electrical connections 33

4.1 Safety instructions.......................................................................................................... 33

4.2 Electrical connection for indicator M40 ......................................................................... 34

4.2.1 Connection of the limit switches K1/K2................................................................................ 34

4.2.2 Current output ESK4 / ESK4A............................................................................................... 37

4.2.3 ESK4-T limit outputs............................................................................................................. 40

4.2.4 ESK4-T pulse output ............................................................................................................. 42

4.2.5 ESK4-T binary input .............................................................................................................. 43

4.2.6 ESK4-FF / ESK4-PA fieldbus communication...................................................................... 44

4.3 Grounding connections................................................................................................... 45

4.4 Ingress protection .......................................................................................................... 45

5 Order form 46

6 Notes 47

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H250 M40

1.1 Intelligent modularity

The H250 all-metal variable area flowmeters cover the entire range of requirements of the process industry. The modular device design and flexible production structure form the basis for application and customer-based device versions.

PRODUCT FEATURES

The basis of the H250 M40 is its purely mechanical design. Additional electronic modules can be added or replaced at any time without interrupting the process. This way, the functionality of the device adapts to any changed requirements. From analogue flow measurement without auxiliary power up to digital integration into a fieldbus system.

Simply screw off the cover, insert the module until it clicks, screw the cover back on and that's it. It is just as easy to replace the measuring scale in the event of a change in application.

1 1 or 2 limit switches, type NAMUR

Transistor (3-wire) or Reed

2-wire signal output 4...20 mA with HART

3 Additional LCD for flow rate value and/or volume

counter, 2 configurable binary outputs for limit or pulse output and 1 binary input for starting/stopping or resetting the counter.

4 2-wire fieldbus communication Foundation

Fieldbus or Profibus PA

All modules are intrinsically safe (Ex i) and can be built into a secondary pressure containment (Ex d, Ex t, Ex nA) as an option.

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PRODUCT FEATURES

Highlights

• Simple, low-cost installation: Measurement and indication without auxiliary power supply

• Universal Ex concept: Ex i and Ex d

• Modular scalability – from mechanical to fieldbus

• Any installation position: vertical upward, horizontal, vertical downward

• Robust measuring tube construction for high process temperatures and extreme operating

pressures

• Choice of material: stainless steel, Hastelloy

• Many connection variants: flanged, screwed, clamped, weld-on ends etc.

• Extended measuring span: up to 100 : 1

• High application safety, even with extremely low flows

Industries

Can be used in all industrial sectors, for example:

• Chemicals

• Petrochemicals

• Pharmaceuticals

• Machine building

• Food & Beverage

• Oil & Gas

• Iron, Steel & Metals

• Power plants

• Pulp & Paper

• Water & Wastewater

, titanium, Monel, PTFE/TFM etc.

H250 M40

Applications

• Nitrogen inerting to avoid explosive atmospheres

• Measurement of additives such as catalysts, tensides, anti-foaming and anti-corrosion

agents

• Measurement of chlorine, sulphur and ethylene compounds

• Measurement of distilled or demineralised water

• Monitoring of lubricating and cooling agents for process pumps and rotating machines

• Monitoring of sealing systems on compressors

• Gas measurement for industrial furnaces

• Hygienic applications in the food industry and in pharmaceuticals

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H250 M40

1.2 Options and variants

Robust design for harsh process conditions

PRODUCT FEATURES

The measuring principle allows for a robust, closed design without sensor integration, as the height of the float is transferred to the indicator by way of a magnetic coupling. This enables high pressure versions that can withstand up to 900 barg / 13000 psig.

All wetted, pressurised parts are made as standard of

1.4404/316L stainless steel and meet the requirements of the NACE MR0175 standard.

To guarantee the durability of the device even with chemically harsh products, it is possible to use special

materials such as Hastelloy production.

In addition, the H250 M40 is also available with a PTFE liner for applications involving aggressive acids and bases.

, titanium, Monel®, etc. in

(Example: H250 M40R)

Hygienic design for FOOD & PHARMA

Smooth stainless steel surfaces with a surface

roughness of ≤ 0.8 µm or 0.6 µm of the wetted parts

make it difficult for deposits and are very easy to clean.

Combined with a design featuring no dead spaces or stagnation zones, micro-organisms have no chance to adhere and multiply. The measuring devices can be cleaned (CIP) and sterilised (SIP) in place.

The appropriate connections and FDA and EC 1935/2023 compliant materials are available for Food & Pharma.

(Example: H250F M40R)

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PRODUCT FEATURES

Versions for special installation positions

(Example: H250H / H250U)

H250 M40

Variable area flowmeters typically have a vertically positioned measuring cone through which the medium flows from bottom to top, lifting a float against the weight.

If the installation structure does not permit otherwise, versions for horizontal or inverted (from top to bottom) installation positions are used.

The missing reset force of the variable area float weight is replaced by a spring.

Version with extended measuring span 100 : 1

Display options

The usual measuring span of the H250 measuring device is 10 : 1.

A measuring span of 100 : 1 can be achieved by inserting a spring which, from a defined float travel, acts as a restoring force in addition to the weight. This eliminates the need for an additional device for minimal volumes.

M40 Aluminium, two-layer powder coating (epoxy / polyester) M40R Stainless steel without coating M40HT High temperature version

Offshore wet coating for aluminium or stainless steel housing as well as for the measuring unit on request

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H250 M40

1.3 Functional principle

The H250 flowmeter operates in accordance with the float measuring principle. The measuring unit consists of a metal cone in which a float can move freely up and down. The medium flows through the flowmeter from bottom to top. The float adjusts itself so that the buoyancy force F1 acting on it, the form resistance F2 and its weight F3 are in equilibrium: F3 = F1 + F2

PRODUCT FEATURES

Figure 1-1: Measuring principle - general

1 Indication principle M40 magnetic coupling 2 Magnetic coupling sensors

1 For the indicator, the flow-dependent height of the float in the measuring unit is transmitted

by means of a magnetic coupling and displayed on a scale.

2 For a built-in signal converter (ESK4 / ESK4A), the flow-dependent height of the float in the measuring unit is detected by the S1 and S2 magnetic field sensors and electronically processed.

Figure 1-2: Measuring principle for H250H and H250U

1 H250H - horizontal flow direction 2 H250U - flow direction from top to bottom

The flowmeter operates in accordance with a modified float measuring principle. The guided float adjusts itself so that the flow force acting on it is in equilibrium with the opposing spring force. The flow-dependent position of the float in the measuring unit is displayed on a scale by means of a magnetic coupling.

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TECHNICAL DATA

H250 M40

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.

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

Measuring system

Application range Flow measurement of liquids, gases and vapours

Function / Measuring principle Float measuring principle

Measured value

Primary measured value Float position

Secondary measured value Operating volume flow, standard volume flow or mass flow

Measuring accuracy

Directive VDI/VDE 3513, sheet 2 (qG = 50%)

H250 /RR /HC /F 1.6%

H250/C (ceramic, PTFE), H250H, H250U, H250 (100 : 1) 2.5%

Precision (repeatability)

Precision (repeatability)Precision (repeatability)

H250 /RR /HC /F 0.25%

H250H, H250U, H250 (100 : 1) 0.5%

Operating conditions

Temperature

TemperatureTemperature Max. operating temperature TS -196...+300°C / -321...+572°F

Pressure

PressurePressure

Max. operating pressure PS, max. test pressure PT Depending on the version (refer to nameplate)

Min. required operating pressure 2 times greater than pressure loss (refer to measuring

Pressure/temperature heating for measuring cone

Pressure/temperature heating for measuring conePressure/temperature heating for measuring cone DN15...DN50 PS = 40 barg / 580 psig, TS = 300°C/ 572°F DN80...DN100 PS = 25 barg / 363 psig, TS = 300°C/ 572°F

Ingress protection

Ingress protectionIngress protection

M40, M40R IP66/68 according to EN 60529, NEMA 4/4X/6 according to

M40R IP69K according to DIN 40050-9

Float damping during gas measurement recommended

Float damping during gas measurement recommendedFloat damping during gas measurement recommended

DN15...25 / 1/2...1" Operating pressure <0.3 barg / 4.4 psig

DN50...100 / 2...4" Operating pressure <0.2 barg / 2.9 psig

Depending on the version (refer to nameplate)

ranges)

NEMA 250

Installation conditions according to VDI/VDE 3513, sheet 3

Inlet section ≥ 5 x DN

Outlet section ≥ 3 x DN

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H250 M40

TECHNICAL DATA

Materials

Device Flange Measuring tube Float Float guide Ring orifice

H250/RR CrNi steel 1.4401 / 1.4404, 316 / 316L (dual

H250/HC

H250/F - Food CrNi steel 1.4435 CrNi-steel 1.4435 / 1.4404

H250/C Ceramic/PTFE

1 DN100/4" only PTFE 2 TFM/PTFE liner (electrically non-conductive), conductive PTFE on request

certification)

Hastelloy® C4 (2.4610) solid or plated

CrNi steel 1.4571 with TFM/PTFE

Hastelloy® C4

1.4404, 316L

PTFE or Al2O3 with FFKM gasket

Al2O3 and PTFE

Other options on request:

• Special materials: e.g. SMO 254/6Mo/1.4547, Titanium Grade 2, Hastelloy® C276/2.4819,

Monel

• Float damping: PEEK (only for gas) or ceramic

• Standard gasket for devices with female thread as insert: O-ring FPM / FKM, others optional

e.g. FFKM, EPDM

M40 Aluminium, two-layer powder coating (epoxy / polyester)

M40R Stainless steel without coating 1.4408 / CF8M

Offshore Wet coating on request

/2.4360, Inconel®/2.4856 a.o.

Al2O

Temperatures

TemperaturesTemperatures

For devices to be used in hazardous areas, special temperature ranges apply. These can be found in the Ex supplementary instructions.

Temperatures H250/M40 - mechanical indicator without auxiliary power

Material Product temperature Ambient temperature

Float Liner [°C] [°F] [°C] [°F]

H250/RR Stainless steel -196...+300 -321...+572 -40...+120 -40…+248 H250/RR screw fitting FPM/FKM -20...+200 -4...+392 -20…+120 -4…+248

H250/HC H250/C PTFE -196...+70 -321...+158 -40...+70 -40…+158

H250/C Ceramic PTFE -196...+150 -321...+302 -40...+70 -40…+158 H250/C Ceramic TFM / Ceramic -196...+250 -321...+482 -40...+120 -40…+248 H250 H/U Spring material stainless steel 1.4301 -40...+100 -40…+212 -40…+120 -40…+248

Hastelloy

Spring material Hastelloy® 2.4610

-196...+300 -321...+572 -40...+120 -40…+248

-40...+200 -40...+392 -40…+120 -40…+248

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TECHNICAL DATA

H250 M40

Ambient temperatures T

with electrical components

amb

Version [°C] [°F]

ESK4, ESK4A, ESK4-FF, ESK4-PA

Limit switches SJ3,5-SN / I7S23,5-N / Reed SPST -40...+70 -40...+158

Limit switches SC3,5-N0 / SJ3,5-S1N / SB3,5-E2 -25...+70 -13...+158

1 Display contrast out of the temperature range 0...+60°C / +32...+140°F decreasing.

-40...+70 -40...+158

The device must not be heated by radiated heat (e.g. exposure to the sun) to an electronics housing surface temperature above the maximum permissible ambient temperature. A sunshade is available as option.

Maximum product temperatures H250/M40 - with electrical components [°C]

< +40°C T

amb

EN ASME Version with Standard HT Standard HT

DN15, DN25

DN50 2" ESK4 / ESK4A, -FF, -PA +200 +300 +165 +300

DN80, DN100

1/2", 1" ESK4 / ESK4A, -FF, -PA +200 +300 +180 +300

ESK4-T +200 +300 +140 +290

Limit switch NAMUR +200 +300 +200 +300

Limit switch 3-wire +200 +300 +130 +295

ESK4-T +200 +300 +140 +290

Limit switch NAMUR +200 +300 +200 +300

Limit switch 3-wire +200 +300 +120 +195

3", 4" ESK4 / ESK4A, -FF, -PA +200 +300 +150 +250

ESK4-T +200 +300 +130 +270

Limit switch NAMUR +200 +300 +200 +300

Limit switch 3-wire +190 +300 +110 +160

< +60°C 1

amb

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H250 M40

TECHNICAL DATA

Maximum product temperatures H250/M40 - with electrical components [°F]

< +104°F T

amb

EN ASME Version with Standard HT Standard HT

< +140°F 1

amb

DN15, DN25

DN50 2" ESK4 / ESK4A, -FF, -PA 392 572 165 572

DN80, DN100

1/2", 1" ESK4 / ESK4A, -FF, -PA 392 572 356 572

ESK4-T 392 572 284 554

Limit switch NAMUR 392 572 392 572

Limit switch 3-wire 392 572 266 563

ESK4-T 392 572 284 554

Limit switch NAMUR 392 572 392 572

Limit switch 3-wire 392 572 248 383

3", 4" ESK4 / ESK4A, -FF, -PA 392 572 302 482

ESK4-T 392 572 266 518

Limit switch NAMUR 392 572 392 572

Limit switch 3-wire 374 572 230 320

1 if there are no heat insulation measures, a heat-resistant cable is necessary (continuous operating temperature of the cable to be used: +100°C / +212°F)

Abbreviation

HT High-temperature version

ESK4 / ESK4A

ESK4-T ESK4 with LCD, binary status outputs, digital counter and pulse output

ESK4-FF FOUNDATION FIELDBUS interface

ESK4-PA PROFIBUS PA interface

2-wire current output 4…20 mA with HART 5

/ HART 7

Cable glands

Material Cable diameter

[mm] [Inch]

M20x1.5 Standard PA 8...13 0.315...0.512

M20x1.5 Nickel-plated brass 10...14 0.394...0.552

M20x1.5 Stainless steel 10...14 0.394...0.552

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TECHNICAL DATA

Limit switches K1/K2

H250 M40

Terminal connection

2.5 mm

Limit switches I7S23,5-N

SJ3,5-SN 1SJ3,5-S1N

SB3,5-E2 Reed

SC3,5-N0

NAMUR (IEC 60947-5-6) Yes Yes Yes No No

Connection type 2-wire 2-wire 2-wire 3-wire 2-wire

Switching element function

Nominal voltage U

Pointer vane not detected ≥ 3mA ≥ 3mA ≤ 1mA ≤ 0.3 VDC U

Normally closed

Normally open PNP NO NC SPST

8.2 VDC 8.2 VDC 8.2 VDC 10...30 VDC max. 32 VDC

Pointer vane detected ≤ 1mA ≤ 1mA ≥ 3mA UB - 3 VDC 0VDC

Continuous current - - - Max. 100 mA Max. 100 mA

No load current I

- - - ≤ 15 mA -

Switching cycles - - - - 100000

1 safety oriented 2 no inductances

Current output ESK4 / ESK4A

Terminal connection

Power supply 14...32 VDC (12...32 VDC without ESK4-T), intrinsically safe

Min. power supply for HART

Measuring signal 4.00...20.00 mA = 0...100% flow value in 2-wire technology

Power supply influence <0.1%

External resistance dependency <0.1% Temperature influence <5 µA/K

Max. external resistance / load 650 Ω at 30 VDC

Min. load for HART

NAMUR conformity NE43, NE107, NE21

2.5 mm

max. 30 VDC

20 VDC at 250 Ω load

250 Ω

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H250 M40

TECHNICAL DATA

ESK4 HART® configuration

Manufacturer name (code) KROHNE Messtechnik (0x45 = 69)

Model name / HART® revision

Physical Layer FSK

ESK4 / ESK4A process variable

Upper range limit +102.5 (±1%) 20.24...20.56

Device error identification > 106.25 >21.00

Multidrop operation 4.5

ESK4-FF

Physical Layer IEC 61158-2 and FISCO model

Communication standard H1 FOUNDATION Fieldbus protocol

ITK version 6.3 (FW ≥ V 2.01)

Power supply Bus supply: 9...32 VDC, intrinsically safe max. 30 VDC

Nominal current 16 mA typical (17 mA rated)

Error current 23 mA

Boot-up current after 10 ms < Nominal current

ESK4 (214 = 0xD6) / HART 5.9

ESK4A (17854 = 0x45BE) / HART 7.4

Values [%] from full scale range

Signal output [mA]

(changeable to 3.6 mA)

For more details refer to the supplementary instructions "H250 M40 Foundation Fieldbus".

ESK4-PA

Physical Layer IEC 61158-2 and FISCO model

Communication standard Profibus PA profile 3.02

PNO ID 4531 HEX

Power supply Bus supply: 9...32 VDC, intrinsically safe max. 30 VDC

Nominal current 16 mA

Error current 23 mA

Boot-up current after 10 ms < Nominal current

For more details refer to the supplementary instructions "H250 M40 Profibus PA".

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TECHNICAL DATA

H250 M40

ESK4-T with LCD, binary inputs and outputs and digital counter

Binary output

Two binary outputs Galvanically isolated, passive

Mode Switching output NAMUR or transistor (OC)

Configurable as switch contact or pulse output NC / NO or max. 10 pulses/s

NAMUR switching output

Power supply 8.2 VDC

Signal current > 3 mA switching value not reached; < 1 mA switching value reached

Switching output transistor (Open Collector)

Power supply Nominal 24 VDC, maximum 30 VDC

max

Continuous current Max. 100 mA

No load current I

500 mW

≤ 2mA

Pulse output

off

Pulse weight

Configurable from 50...500 ms

Depending on flow rate

Configurable in flow units e.g. 5 pulses/m

Binary input

Input Galvanically isolated

Mode Reset counters or Start / Stop

Configurable as active HI / active LO

H signal 16...30 VDC

Internal resistance R

Ton (active) ≥ 500 ms

Typical 20 kΩ

LC display

Technology Passive graphic LCD

Display Measurement with units and/or counter reading with units.

Configuration Local plain text menu navigation via microswitch or bar magnet or using

Counter reading max. 11-digit with power failure proof storage. Binary flags for limit value status. 0...100% bargraph for measurement. NE 107 diagnostic status symbols. Plain text menu for configuration.

DD/DTM software

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H250 M40

Approvals

Standard Indicator Marking

TECHNICAL DATA

ATEX / IECEx M40 mechanical II2GD IIC

M40 electrical II2G Ex ia IIC T6 Gb

FM (USA) NEC500 FM (Canada) NEC505

NEPSI M40 electrical Ex ia, Ex d, Ex nA, Ex t

CCOE/PESO M40 electrical Ex ia, Ex d

EAC M40 mechanical Ex c

INMETRO M40 electrical Ex ia, Ex d, Ex nA, Ex t

KGS M40 electrical Ex ia, Ex d, Ex nA, Ex t

M40 electrical IS Class I Div 1, Class I Zone 1 AEx ia

M40 electrical Ex ia, Ex d, Ex nA, Ex t

II3GD IIC

II2G Ex d IIC T6 Gb II3G Ex nA IIC T6 Gc II2D Ex t IIIC T70°C Db II2D Ex ia IIIC T85°C Db

XP Class I Div 1, Class I Zone 1 AEx d NI Class I Div 2, Class I Zone 2 AEx nA DIP Class II / III Div 1, Class II/III Zone 21 AEx tb

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