H250 M40 Technical Datasheet
Variable area flowmeter
•Secure, cost-effective measurement and display, even without power supply
•A device that meets all Ex requirements, worldwide
•Sturdy, closed design for high resistance to pressure, temperature and product
© KROHNE 10/2018 - 4000685605 - TD H250-M40 R05 en
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CONTENTS |
H250 M40 |
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1 |
Product features |
3 |
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1.1 |
Intelligent modularity ....................................................................................................... |
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1.2 |
Options and variants......................................................................................................... |
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1.3 |
Functional principle.......................................................................................................... |
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2 |
Technical data |
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2.1 |
Technical data................................................................................................................... |
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2.2 |
Dimensions and weight .................................................................................................. |
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2.3 |
Measuring ranges........................................................................................................... |
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3 |
Installation |
27 |
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3.1 |
Intended use ................................................................................................................... |
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3.2 |
Installation conditions .................................................................................................... |
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3.2.1 Tightening torques................................................................................................................ |
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3.2.2 Magnetic filters ..................................................................................................................... |
30 |
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3.2.3 Heat insulation ...................................................................................................................... |
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3.2.4 Float damping ....................................................................................................................... |
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3.2.5 Pointer damping.................................................................................................................... |
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Electrical connections |
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4.1 |
Safety instructions.......................................................................................................... |
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4.2 |
Electrical connection for indicator M40 ......................................................................... |
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4.2.1 Connection of the limit switches K1/K2................................................................................ |
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4.2.2 Current output ESK4 / ESK4A............................................................................................... |
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4.2.3 ESK4-T limit outputs............................................................................................................. |
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4.2.4 ESK4-T pulse output ............................................................................................................. |
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4.2.5 ESK4-T binary input .............................................................................................................. |
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4.2.6 ESK4-FF / ESK4-PA fieldbus communication...................................................................... |
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4.3 |
Grounding connections................................................................................................... |
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4.4 |
Ingress protection .......................................................................................................... |
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5 |
Order form |
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6 |
Notes |
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47 |
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10/2018 - 4000685605 - TD H250-M40 R05 en |
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PRODUCT FEATURES 1 |
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H250 M40 |
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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.
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.
11 or 2 limit switches, type NAMUR Transistor (3-wire) or Reed
22-wire signal output 4...20 mA with HART®
3Additional 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.
42-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.
10/2018 - 4000685605 - TD H250-M40 R05 en |
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1 PRODUCT FEATURES |
H250 M40 |
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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®, titanium, Monel, PTFE/TFM etc.
•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
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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10/2018 - 4000685605 - TD H250-M40 R05 en |
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PRODUCT FEATURES 1 |
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H250 M40 |
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1.2 Options and variants
Robust design for harsh process conditions
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®, titanium, Monel®, etc. in production.
In addition, the H250 M40 is also available with a PTFE liner for applications involving aggressive acids and bases.
(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)
10/2018 - 4000685605 - TD H250-M40 R05 en |
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1 PRODUCT FEATURES |
H250 M40 |
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Versions for special installation positions
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.
(Example: H250H / H250U)
Version with extended measuring span 100 : 1
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.
Display options
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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10/2018 - 4000685605 - TD H250-M40 R05 en |
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PRODUCT FEATURES 1 |
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H250 M40 |
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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
Figure 1-1: Measuring principle - general
1Indication principle M40 magnetic coupling
2Magnetic 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
1H250H - horizontal flow direction
2H250U - 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.
10/2018 - 4000685605 - TD H250-M40 R05 en |
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2 TECHNICAL DATA |
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H250 M40 |
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2.1Technical 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
Application range |
Flow measurement of liquids, gases and vapours |
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Function / Measuring principle |
Float measuring principle |
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Measured value |
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Primary measured value |
Float position |
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Secondary measured value |
Operating volume flow, standard volume flow or mass flow |
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Measuring accuracy
Directive |
VDI/VDE 3513, sheet 2 (qG = 50%) |
H250 /RR /HC /F |
1.6% |
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H250/C (ceramic, PTFE), H250H, H250U, H250 (100 : 1) |
2.5% |
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Precision (repeatability) |
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H250 /RR /HC /F |
0.25% |
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H250H, H250U, H250 (100 : 1) |
0.5% |
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Operating conditions
Temperature
Max. operating temperature TS |
-196...+300°C / -321...+572°F |
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Depending on the version (refer to nameplate) |
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Pressure |
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Max. operating pressure PS, max. test pressure PT |
Depending on the version (refer to nameplate) |
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Min. required operating pressure |
2 times greater than pressure loss (refer to measuring |
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ranges) |
Pressure/temperature heating for measuring cone |
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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 |
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M40, M40R |
IP66/68 according to EN 60529, NEMA 4/4X/6 according to |
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NEMA 250 |
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M40R |
IP69K according to DIN 40050-9 |
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Float damping during gas measurement recommended |
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DN15...25 / 1/2...1" |
Operating pressure <0.3 barg / 4.4 psig |
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DN50...100 / 2...4" |
Operating pressure <0.2 barg / 2.9 psig |
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Installation conditions according to VDI/VDE 3513, sheet 3
Inlet section |
≥ 5 x DN |
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Outlet section |
≥ 3 x DN |
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10/2018 - 4000685605 - TD H250-M40 R05 en |
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TECHNICAL DATA 2 |
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H250 M40 |
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Materials
Device |
Flange |
Measuring tube |
Float |
Float guide |
Ring orifice |
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H250/RR |
CrNi steel 1.4401 / 1.4404, 316 / 316L (dual |
1.4404, 316L |
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certification) |
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H250/HC |
Hastelloy® C4 |
Hastelloy® C4 |
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(2.4610) solid or |
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plated |
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H250/F - Food |
CrNi steel 1.4435 |
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CrNi-steel 1.4435 / 1.4404 |
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H250/C - |
CrNi steel 1.4571 with TFM/PTFE 2 |
PTFE or Al2O3 with |
Al2O3 and |
Al2O3 |
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Ceramic/PTFE 1 |
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FFKM gasket |
PTFE |
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1DN100/4" only PTFE
2TFM/PTFE liner (electrically non-conductive), conductive PTFE on request
Other options on request:
•Special materials: e.g. SMO 254/6Mo/1.4547, Titanium Grade 2, Hastelloy® C276/2.4819, Monel®/2.4360, Inconel®/2.4856 a.o.
•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) |
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M40R |
Stainless steel without coating 1.4408 / CF8M |
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Offshore |
Wet coating on request |
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Temperatures
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
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Material |
Product temperature |
Ambient temperature |
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Float |
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Liner |
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[°F] |
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[°F] |
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H250/RR |
Stainless steel |
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-196... |
+300 |
-321... |
+572 |
-40... |
+120 |
-40…+248 |
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H250/RR screw fitting FPM/FKM |
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-20... |
+200 |
-4...+392 |
-20…+120 |
-4…+248 |
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H250/HC |
Hastelloy® |
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-196... |
+300 |
-321... |
+572 |
-40... |
+120 |
-40…+248 |
H250/C |
PTFE |
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-196... |
+70 |
-321... |
+158 |
-40... |
+70 |
-40…+158 |
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H250/C |
Ceramic |
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PTFE |
-196... |
+150 |
-321... |
+302 |
-40... |
+70 |
-40…+158 |
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H250/C |
Ceramic |
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TFM / Ceramic |
-196... |
+250 |
-321... |
+482 |
-40... |
+120 |
-40…+248 |
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H250 H/U |
Spring material stainless steel 1.4301 |
-40... |
+100 |
-40…+212 |
-40…+120 |
-40…+248 |
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Spring material Hastelloy® 2.4610 |
-40... |
+200 |
-40... |
+392 |
-40…+120 |
-40…+248 |
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9 |
2 TECHNICAL DATA |
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H250 M40 |
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Ambient temperatures Tamb with electrical components
Version |
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[°C] |
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[°F] |
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ESK4, ESK4A, ESK4-FF, ESK4-PA 1 |
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-40... |
+70 |
-40... |
+158 |
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Limit switches SJ3,5-SN / I7S23,5-N / Reed SPST |
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-40... |
+70 |
-40... |
+158 |
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Limit switches SC3,5-N0 / SJ3,5-S1N / SB3,5-E2 |
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-25... |
+70 |
-13... |
+158 |
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1 Display contrast out of the temperature range 0 +60°C / +32... ... |
+140°F decreasing. |
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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]
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Tamb < +40°C |
Tamb < +60°C 1 |
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EN |
ASME |
Version with |
Standard |
HT |
Standard |
HT |
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DN15, |
1/2", 1" |
ESK4 / ESK4A, -FF, -PA |
+200 |
+300 |
+180 |
+300 |
DN25 |
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ESK4-T |
+200 |
+300 |
+140 |
+290 |
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Limit switch NAMUR |
+200 |
+300 |
+200 |
+300 |
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Limit switch 3-wire |
+200 |
+300 |
+130 |
+295 |
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DN50 |
2" |
ESK4 / ESK4A, -FF, -PA |
+200 |
+300 |
+165 |
+300 |
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ESK4-T |
+200 |
+300 |
+140 |
+290 |
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Limit switch NAMUR |
+200 |
+300 |
+200 |
+300 |
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Limit switch 3-wire |
+200 |
+300 |
+120 |
+195 |
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DN80, |
3", 4" |
ESK4 / ESK4A, -FF, -PA |
+200 |
+300 |
+150 |
+250 |
DN100 |
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ESK4-T |
+200 |
+300 |
+130 |
+270 |
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Limit switch NAMUR |
+200 |
+300 |
+200 |
+300 |
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Limit switch 3-wire |
+190 |
+300 |
+110 |
+160 |
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TECHNICAL DATA 2 |
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H250 M40 |
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Maximum product temperatures H250/M40 - with electrical components [°F] |
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Tamb < +104°F |
Tamb < +140°F 1 |
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EN |
ASME |
Version with |
Standard |
HT |
Standard |
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HT |
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DN15, |
1/2", 1" |
ESK4 / ESK4A, -FF, -PA |
392 |
572 |
356 |
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572 |
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DN25 |
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ESK4-T |
392 |
572 |
284 |
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554 |
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Limit switch NAMUR |
392 |
572 |
392 |
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572 |
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Limit switch 3-wire |
392 |
572 |
266 |
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563 |
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DN50 |
2" |
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ESK4 / ESK4A, -FF, -PA |
392 |
572 |
165 |
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572 |
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ESK4-T |
392 |
572 |
284 |
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554 |
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Limit switch NAMUR |
392 |
572 |
392 |
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572 |
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Limit switch 3-wire |
392 |
572 |
248 |
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383 |
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DN80, |
3", 4" |
ESK4 / ESK4A, -FF, -PA |
392 |
572 |
302 |
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482 |
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DN100 |
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ESK4-T |
392 |
572 |
266 |
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518 |
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Limit switch NAMUR |
392 |
572 |
392 |
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572 |
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Limit switch 3-wire |
374 |
572 |
230 |
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320 |
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1 if there are no heat insulation measures, a heat-resistant cable is necessary (continuous |
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operating temperature of the cable to be used: +100°C / +212°F) |
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Abbreviation |
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HT |
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High-temperature version |
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ESK4 / ESK4A |
2-wire current output 4…20 mA with HART 5® / HART 7® |
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ESK4-T |
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ESK4 with LCD, binary status outputs, digital counter and pulse output |
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ESK4-FF |
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FOUNDATION FIELDBUS interface |
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ESK4-PA |
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PROFIBUS PA interface |
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Cable glands |
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Material |
Cable diameter |
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[mm] |
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[Inch] |
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M20x1.5 Standard |
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PA |
8...13 |
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0.315...0.512 |
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M20x1.5 |
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Nickel-plated brass |
10...14 |
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0.394...0.552 |
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M20x1.5 |
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Stainless steel |
10...14 |
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0.394...0.552 |
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10/2018 - 4000685605 - TD H250-M40 R05 en |
www.krohne.com |
11 |
2 TECHNICAL DATA |
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H250 M40 |
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Limit switches K1/K2
Terminal connection |
2.5 mm2 |
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Limit switches |
I7S23,5-N |
SJ3,5-SN 1 |
SJ3,5-S1N 1 |
SB3,5-E2 |
Reed |
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SC3,5-N0 |
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NAMUR (IEC 60947-5-6) |
Yes |
Yes |
Yes |
No |
No |
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Connection type |
2-wire |
2-wire |
2-wire |
3-wire |
2-wire |
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Switching element |
Normally |
Normally |
Normally open |
PNP NO |
NC SPST |
function |
closed |
closed |
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Nominal voltage U0 |
8.2 VDC |
8.2 VDC |
8.2 VDC |
10...30 VDC |
max. 32 VDC |
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2 |
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Pointer vane not detected |
≥ 3 mA |
≥ 3 mA |
≤ 1 mA |
≤ 0.3 VDC |
U0 |
Pointer vane detected |
≤ 1 mA |
≤ 1 mA |
≥ 3 mA |
UB - 3 VDC |
0 VDC |
Continuous current |
- |
- |
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Max. 100 mA |
Max. 100 mA |
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No load current I0 |
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≤ 15 mA |
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Switching cycles |
- |
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100000 |
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1 safety oriented |
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2 no inductances |
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Current output ESK4 / ESK4A
Terminal connection |
2.5 mm2 |
Power supply |
14...32 VDC (12...32 VDC without ESK4-T), intrinsically safe |
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max. 30 VDC |
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Min. power supply for HART® |
20 VDC at 250 Ω load |
Measuring signal |
4.00...20.00 mA = 0...100% flow value in 2-wire technology |
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Power supply influence |
<0.1% |
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External resistance dependency |
<0.1% |
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Temperature influence |
<5 µA/K |
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Max. external resistance / load |
650 Ω at 30 VDC |
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Min. load for HART® |
250 Ω |
NAMUR conformity |
NE43, NE107, NE21 |
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12 |
www.krohne.com |
10/2018 - 4000685605 - TD H250-M40 R05 en |
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TECHNICAL DATA 2 |
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H250 M40 |
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ESK4 HART® configuration
Manufacturer name (code) |
KROHNE Messtechnik (0x45 = 69) |
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Model name / HART® revision |
ESK4 (214 = 0xD6) / HART 5.9 |
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ESK4A (17854 = 0x45BE) / HART 7.4 |
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Physical Layer |
FSK |
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ESK4 / ESK4A process variable
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Values [%] from full scale |
Signal output [mA] |
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range |
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Upper range limit |
+102.5 (±1%) |
20.24...20.56 |
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Device error identification |
> 106.25 |
>21.00 |
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(changeable to 3.6 mA) |
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Multidrop operation |
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4.5 |
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ESK4-FF
Physical Layer |
IEC 61158-2 and FISCO model |
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Communication standard |
H1 FOUNDATION Fieldbus protocol |
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ITK version |
6.3 (FW ≥ V 2.01) |
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Power supply |
Bus supply: 9...32 VDC, intrinsically safe max. 30 VDC |
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Nominal current |
16 mA typical (17 mA rated) |
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Error current |
23 mA |
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Boot-up current after 10 ms |
< Nominal current |
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For more details refer to the supplementary instructions "H250 M40 Foundation Fieldbus".
ESK4-PA
Physical Layer |
IEC 61158-2 and FISCO model |
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Communication standard |
Profibus PA profile 3.02 |
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PNO ID |
4531 HEX |
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Power supply |
Bus supply: 9...32 VDC, intrinsically safe max. 30 VDC |
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Nominal current |
16 mA |
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Error current |
23 mA |
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Boot-up current after 10 ms |
< Nominal current |
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For more details refer to the supplementary instructions "H250 M40 Profibus PA".
10/2018 - 4000685605 - TD H250-M40 R05 en |
www.krohne.com |
13 |
2 TECHNICAL DATA |
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H250 M40 |
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ESK4-T with LCD, binary inputs and outputs and digital counter |
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Binary output |
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Two binary outputs |
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Galvanically isolated, passive |
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Mode |
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Switching output |
NAMUR or transistor (OC) |
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Configurable as |
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switch contact or pulse output |
NC / NO or max. 10 pulses/s |
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NAMUR switching output |
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Power supply |
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8.2 VDC |
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Signal current |
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> 3 mA switching value not reached; |
< 1 mA switching value reached |
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Switching output transistor (Open Collector) |
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Power supply |
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Nominal 24 VDC, maximum 30 VDC |
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Pmax |
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500 mW |
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Continuous current |
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Max. 100 mA |
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No load current I0 |
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≤ 2 mA |
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Pulse output |
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Ton |
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Configurable from 50...500 ms |
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Toff |
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Depending on flow rate |
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Pulse weight |
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Configurable in flow units e.g. 5 pulses/m3 |
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Binary input |
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Input |
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Galvanically isolated |
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Mode |
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Reset counters or Start / Stop |
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Configurable as |
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active HI / active LO |
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H signal |
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16...30 VDC |
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Internal resistance Ri |
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Typical 20 kΩ |
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Ton (active) |
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≥ 500 ms |
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LC display |
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Technology |
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Passive graphic LCD |
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Display |
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Measurement with units and/or counter reading with units. |
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Counter reading max. 11-digit with power failure proof storage. |
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Binary flags for limit value status. 0...100% bargraph for measurement. |
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NE 107 diagnostic status symbols. Plain text menu for configuration. |
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Configuration |
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Local plain text menu navigation via microswitch or bar magnet or using |
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DD/DTM software |
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14 |
www.krohne.com |
10/2018 - 4000685605 - TD H250-M40 R05 en |
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TECHNICAL DATA 2 |
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H250 M40 |
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Approvals
Standard |
Indicator |
Marking |
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ATEX / IECEx |
M40 mechanical |
II2GD IIC |
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II3GD IIC |
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M40 electrical |
II2G Ex ia IIC T6 Gb |
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II2G Ex d IIC T6 Gb |
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II3G Ex nA IIC T6 Gc |
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II2D Ex t IIIC T70°C Db |
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II2D Ex ia IIIC T85°C Db |
FM (USA) NEC500 |
M40 electrical |
IS Class I Div 1, Class I Zone 1 AEx ia |
FM (Canada) |
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XP Class I Div 1, Class I Zone 1 AEx d |
NEC505 |
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NI Class I Div 2, Class I Zone 2 AEx nA |
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DIP Class II / III Div 1, Class II/III Zone 21 AEx tb |
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NEPSI |
M40 electrical |
Ex ia, Ex d, Ex nA, Ex t |
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CCOE/PESO |
M40 electrical |
Ex ia, Ex d |
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EAC |
M40 mechanical |
Ex c |
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M40 electrical |
Ex ia, Ex d, Ex nA, Ex t |
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INMETRO |
M40 electrical |
Ex ia, Ex d, Ex nA, Ex t |
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KGS |
M40 electrical |
Ex ia, Ex d, Ex nA, Ex t |
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10/2018 - 4000685605 - TD H250-M40 R05 en |
www.krohne.com |
15 |
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