KROHNE GFM700 User Manual

 KROHNE 06/2003 7.30937.32.00

Variable area flowmeters

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Installation and operating instructions

GFM 700 K GFM 700 F

GFM 700 F - EEx ATEX GFM 700 F/HT- EEx ATEX

Ultrasonic gas flowmeter

General advice on safety

Safety instructions This product is designed for use in accordance with EN IEC 61010-1 for Installation Category 2 and Pollution Degree 2. Hazardous voltages are present within this product during normal operation. The product is designed for Protection Class I and should never be operated without protective earthing. The product shall also never be operated with covers removed unless equivalent protection of the operator and its environment from accidental contact with hazardous internal voltages is provided. Always follow basic and local safety precautions when using this product to reduce risk of injury from electrical shock, spread of fire or other dangerous situations.

1. Do not install, maintain or operate this flow meter without reading, understanding and following the factory-supplied instructions and manuals, otherwise injury or damage may result.

2. Read these instructions carefully before starting installation. Save these instructions for future reference.

3. Observe all warnings and instructions marked on the product

4. Use only mains supply with protective earthing connected

5. Do not use the product with removed covers under wet conditions

6. Consider handling and lifting instructions to avoid damage

7. Install the product securely and stable

8. Install and connect cabling proper to exclude damage or harmful situations

9. If the product does not operate normally refer to qualified KROHNE service technicians

10. Ther are no operator serviceable components inside the product

The following symbols may appear in this manual or on the product :

Attention : refer to the manual

DANGER : risk of electrical shock

PROTECTIVE conductor terminal

WARNING Warning statements identify conditions or practice that could result in injury loss of live

CAUTION

Caution statements identify conditions or practice that could result in damage to the product or other property

Declarations of Conformity / Statement of Compliance

Low Voltage directive The product complies with the requirements of the Low Voltage Directive 73/23/EEC and is designed in accordance with EN IEC 61010-1 first and second edition. (safety requirements for electrical equipment for measurement, control and laboratory use part 1) Local safety regulations shall be observed in combination with the measures special to this product to avoid dangerous situations

Unpacking and inspection

This product has been thoroughly inspected and tested before shipment and is ready for operation. After carefully unpacking, inspect for shipping damage before attempting to operate. If any indication of mechanical damage is found contact immediate the responsible transport service and your local KROHNE representative. A simple operating check of the electronics after unpacking and before permanent installation, is advisable to ascertain whether it has suffered damage during shipment. Confirm for the correct mains voltage printed on the nameplate. If it differs from the ordered product please contact your local KROHNE representative. After connecting to the mains, check if there is any indication on the display and if the backlight of the display is lighted. If not contact your local KROHNE representative for advise.

Disclamer

This document contains important information of the product. KROHNE attempts to be as accurate and up-to-date as possible but assumes no responsibility for errors or omissions. Nor does KROHNE make any commitment to update the information contained herin. This manual and all other documents are subject to change without notice. KROHNE will not be liable for any damage of any kind by using its product, including, but not limited to direct, indirect, incidental, punitive and consequential damages. This disclamer does not apply in case KROHNE has acted on purpose or with gross negligence. In the event any applicable law does not allow such limitations on implied warranties or the exclusion of limitation of certain damages, you may, if such law applies to you, not be subject to some or all of the above disclamer, exclusions or limitations. Any product purchased from KROHNE is warranted in accordance with the relevant product documentation and our Terms and Conditions of Sale. KROHNE reserves the right to alter the content of its documents, including this disclamer in any way, at any time, for any reason, without prior notification, and will not be liable in any way for possible consequences of such changes.

CAUTION

There are no operator servicable parts or adjustments within the product enclosure Refer all servicing to trained service technicians

Source power shall be removed from the product to perform any servicing

This product is prepared for the nominal AC mains voltage indicated on its tagplate. To reconfigure the product power input for other mains voltages as listed in the chapter Technical data, the product must be modified including the fuses by a trained service technician. After a power input reconfiguration the tagplate needs to be adapted.

This product is a Class 1 device, (earthed which utilizes a proper connection to the protective earthing for protection from electrical shock to ensure operator and its environmental safety.

The protective conductor terminal of the product shall be properly connected to the protective earth wiring of the source power to ensure safety from electrically shock. See instruction manual

Protective earthing conductor terminal. This symbol indicates the point on the product to which the protective earthing conductor shall be connected. It is positioned near the terminal block, inside the terminal compartmen. The diameter of the protective earthing conductor shall be in accordance with the Low Voltage Directive.

Manufacturer

The GFM 700 is developed and manufactured by KROHNE Altometer Kerkeplaat 12 3313 LC Dordrecht, The Netherlands

Content

1 GFM 700 Ultrasonic gas flowmeter 5

2 Size, flow velocity, flowrate 5

3 Measuring principle 6

4 Technical data 7 – 10

4.1 Versions, full-scale ranges, accuracies 7

4.2 GFS 700 Primary head 7

4.3 GFC 700 Signal converter 8 – 9

4.4 Environmental conditions 9

4.5 Dimensions and weights 10

5 Installation notes 11

6 Electrical 11

6.1 Electrical connections 11

6.2 Electrical installation to the main supply voltage 11

7 Operation of the signal converter 12 – 20

7.1 Table of settable functions 12 – 18

7.2 Error messages 19 – 20

Addition for the GFM 700 F-EEx ATEX and

20 – 30

GFM 700 HT EEx-ATEX

8.1 General 21

8.2 System components 21 – 22

8.3 Electrical connection 23 – 28

8.4 Connecting cables 29

8.5 Connection diagram 30

9 ATEX approvals 31 – 36

9.1 GFC 700 F - EEx Signal converter 31 – 33

9.2 GFS 700 F - EEx Primary head (flowmeter) 34 – 36

1 GFM 700 Ultrasonic gas flowmeter

First ultrasonic gas flowmeter with two beams

Non-contact ultrasonic gas flow measurement and volume counting, suitable for all gases available meter sizes DN 50-600 and 2”-24”.

Wide range of application

The large range of products that can be measured accurately and easily make this a truly universal device. Just a few examples: Natural gas

• Air

• Methane

• Nitrogen

• Determination of the molecular weight of

gases

• Measurement in hazardous locations, Zones 1 and 2

2 Size, flow velocity, flowrate

Selection of meter size / nominal pipe size

Flow velocitys in m/s or ft/s and the flowrate in m3/h or US Gal / min can be determinded for each meter size (DN) using the Tables below.

Example: v in m/s Example: v in ft/s

Nominal pipe size DN 150 Required measuring range 1000 m3/h

For a flow velocity of 1 m/s at DN 150, the table gives a flowrate of 63.617 m3/h.

For 1000 m

/hr, the flow velocity v is thus

1000 m3/h x 1 m/s v = -------------------------- = 15.72 m/s

63.617 m3/h

Flowtable for v = 1 m/s

Meter size Flow Meter size Flow

in mm in inches m3/h in inches in mm US Gal/min DN 50 2 7.0686 2 DN 50 31.13

DN 65 2 ½ 11.946 3 DN 80 79.68 DN 80 3 18.096 4 DN 100 124.49 DN 100 4 28.274 5 DN 125 194.52 DN 125 5 44.179 6 DN 150 280.11 DN 150 6 63.617 8 DN 200 497.98 DN 200 8 113.10 10 DN 250 778.05 DN 250 10 176.71 14 DN 350 1525.0 DN 300 12 254.47 16 DN 400 1991.9 DN 350 14 346.36 20 DN 500 3112.8 DN 400 16 452.39 24 DN 600 4418.8 DN 500 20 706.86 DN 600 24 1017.9

Calibrated on EN 17025 accredited calibration rigs, calibration accuracy better than 99.97% of the measured value.

Precise determination of flow velocities

For range setting, use the flow table below to determine the precise flow velocity for each nominal pipe size.

Nominal pipe size 6” Required measuring range 5000 US Gal / min

For a flow velocity of 3.3 ft/s at 6’’, the table gives a flowrate of 280.11 gal/min.

For 5000 Gal / min, the flow velocity v is thus

5000 US / min x 3.3 ft/s v = ---------------------------------- = 58.91 ft/s

280.11 US Gal / min

Flowtable for v = 10 ft/s

3 Measuring principle

All KROHNE ultrasonic flowmeters operate using the transit-time differential method.

Transit-time differential measurement is based on a simple physical fact.

Imagine two canoes crossing a river on the same diagonal line, one with the flow and the other against the flow. The canoe moving with the flow needs much less time to reach the opposite bank.

Ultrasonic waves behave exactly the same way. A sound wave travelling in the direction of flow of the product is propagated at a faster rate than one travelling against the flow (v

> vBA).

Transit times t difference (t waves is directly proportional to the mean flow velocity (vm) of the product.

The volumetric flowrate per unit time is the product of the mean flow velocity (v section.

A liquid product is identified by direct measurement of the transit time of ultrasonic waves. Assuming the same path length (L), the transit time in water is shorter than in crude oil, for example.

and tBA are measured continuously. The

- tAB) in time travelled by the two ultrasonic

) multiplied by the pipe cross-

Propagation rate

of ultrasonic waves . . .

… in direction of flow

of product from sensor A to B

+ vm x cosϕ

= c

… counter to direction of flow

of product

= c

– vm × cosϕ

from sensor A to B

with the given product flow direction

mean flow velocity v of liquid product

> v

– tAB)

vm = GK x ---------------

(tAB x tBA)

Transit time of ultrasonic waves … L

= ---------------------

co + vm x cosϕ

L t

= --------------------

- vm x cosϕ

tAB < tBA

A (A’)

B (B’)

Sensor A, transmitter and receiver

Sensor B, transmitter and receiver

Sound velocity in the product

A calibration constant

Length of measuring beam, distance between sensors A and B Angle between pipe axis and measuring beam

Transit time of ultrasonic waves

from sensor A to sensor B

Transit time of ultrasonic waves

from sensor B to sensor A

Propagation rate of ultrasonic waves between

sensor A and sensor B

Propagation rate of ultrasonic waves between

sensor B and sensor A

Mean flow velocity of liquid product

Technical data

The responsibility as to the suitability, intended use and corrosion-resistanc

of the materials used in their construction rests solely with the purchaser.

4.1 Versions, full-scale ranges, accuracies

Versions Primary head (S) Signal converter (C)

GFM 700 K integral system GFS 700 K GFC 700 K

GFM 700 F remote system GFS 700 F GFC 700 F

GFM 700 F-EEx GFS 700 F-EEx GFC 700 F - EEx

(Ex versions (remote system)) Approval to ATEX (Ex II 2 G) signal converter is installed

EEX de IIC T6 oder EEx d IIC T6 in non hazardous area

DEMKO Nr. 00ATEX2118 X

Full-scale ranges (configurable)

volume flow v

100%

Standard 14 – 25000 m3/h

60 – 88000 US Gal/min

Option 14 – 30000 m3/h

60 – 156000 US Gal/min

flow velocity

100%

2 – 25 m/s

6.6 – 80 ft/s 2 – 30 m/s

6.6 – 100 ft/s

Error limits

Accuracy

DN ≥ 80 / ≥ 3”

DN ≤ 65 / ≤ 1½”

v < 2 m/s ± 0.04 m/s (± 0.13 ft/s) v ≥ 2 m/s

± 2% of measured value

± 2% of measured value + 0.04 m/s

(± 2% of measured value + 0.13 ft/s)

Repeatability

± 0.5% of measured value

4.2 GFS 700 Primary head

Diameter

DN 50 – 600 / 2” – 24” (option DN 700 – 1200 / 28” – 48”)

Flange connections Pressure rating (standard) to DIN 2501 DN 50, DN 80: PN 40 40 bar / 580 psig

DN 65, DN 100 – 150: PN 16 16 bar / 230 psig

DN 200 – 600: PN 10 10 bar / 150 psig

to ANSI B 16.5 2” – 24”: Class 150 lb / RF 19 bar / 275 psig

Special versions max. 100 bar / 900 lb

Max. operating data Gas-Temperature Operating pressure

Integral systems standard option Ambient temperature ≤ 40°C / ≤ 104°F

Ambient temperature ≤ 60°C / ≤ 140°F Remote systems

Hazardous-duty versions

≤ 140°C / 284 °F ≤ 25 bar / 360 psig ≤ 40 bar / 580 psig ≤ 60°C / 140 °F ≤ 25 bar / 360 psig ≤ 40 bar / 580 psig

≤ 180°C / 356 °F ≤ 25 bar / 360 psig ≤ 40 bar / 580 psig ≤ 180°C / 356 °F ≤ 20 bar / 300 psig

–

Max. allowable flow velocity

Max. allowable meter size (DN) as a function of process product

Protection category (IEC 529 / EN 60529)

Materials

≤ 25 m/s / ≤ 80 ft/s, optionally ≤ 30 m/s / ≤ 100 ft/s

[mm] = 200 x

max

ensity ρ

in kg/m3 or in [lb/ft3]

Gas

[kg/m3] or [inches] = 0.47 x ρ

Gas

IP 65 equivalent to NEMA 4 and 4X

Measuring tube and flanges

Standard DN 50-300 2“-12“ SS 1.4301 (measuring tube) and steel (flanges)

DN 350-600 14“-24“ steel

Option DN 50-600 2“-24“ SS 1.4404

DN 50-600 (only DIN) SS 1.4571

Ultrasonic sensors

Gaskets

Viton

SS 1.4301

[lb/ft3]

gas

4.3 GFC 700 Signal converter

Versions

Integral systems (K) Remote systems (F)

Option MP

Power supply 1. AC Version AC / DC Version

Standard Option

1. Rated voltage 115 / 230 V 24 V AC 24 V DC Tolerance band +/- 13 % 20 – 27 V AC 18 – 32 V DC

Frequency 48 – 63 Hz 48 – 63 Hz –

Power consumption Max. 13 VA approx. 10 VA approx. 8 W (incl. primary head)

to VDE 0100 / VDE 0106 and IEC 364 / IEC 536 or equivalent national standards.

When connected to functional extra-low voltage (24 V) safety separation (PELV) is essential

Analog Output

Function

Current for Q = 0%: 0 – 16 mA

for Q = 100%: 4 – 20 mA

Active mode load max. 680 Ohm

Passive mode

Low-flow cutoff cutoff “on” value 1 – 19%

cutoff “off” value 2 – 20%

Time constant 0.04 – 3600 s, setting in increments of 1, 0.1 or 0.01 s

Forward / reverse measurement direction identified via status output (or pulse output)

Internal power supply for binary outputs

GFC 700 K signal converter mounted on primary head GFC 700 F signal converter with wall mount (rotating design) and

additional terminal box signal converter equipped with magnet sensors, to set the signal converter by means of hand held bar magnet without opening the housing

• continuous flowrate measurement or measurement of sound velocity to determine (composition of) liquid product

• all operating data configurable

• galvanically isolated

• for active and passive mode

• useable as internal power supply for the binary outputs

settings in 1 mA increments (I

= 22 mA)

max

external voltage ≤ 18 V DC load ≤ 680 Ohm

100%

of Q setting in 1% increments

= 19 – 32 V DC / I ≤ 50 mA

int

Pulse output

Function

– continuous flow counting or measurement of sound velocity to determine (composition of) liquid product – all operating data configurable – galvanically isolated – active and passive mode Pulse rate for Q = 100% 10 – 3600000 pulses/h 0,167 – 60000 pulses/min

0.0028 – 1000 pulses/s (= Hz)

optionally in pulse per liter, m US gallons or user-defined unit

Pulse width automatic: pulse duty cycle 1:1, max. 1000 Pulse/s = max. 1000 Hz

variable: 30, 50, 100, 200, 500 ms, ≤ 10 Pulse/s ≤ 10 Hz

Active mode connection: electronic totalizer internal voltage: 19 – 32 V DC, from current output

< 50 mA, operation with status

load current:

max

output Passive mode connection: electronic or electromechanical totalizer external voltage: U load current: I

Low-flow cutoff cutoff “on” value: 1 – 19% cutoff “off” value: 2 – 20%

≤ 32 V DC / ≤ 24 V AC

ext

≤ 150 mA

max

, setting in 1% increments

Q100%

Time constant 0.04 – 3600 s, setting in increments of 1, 0.1 or 0.01 s

direction identified via status output or current output (status output only

Forward / reverse measurement

available in non-EEx version)

Local display

Display function

Units: actual flowrate

totalizer

Language of plain texts English, French, German, Dutch, other on request Display 1st line (top)

2nd line (middle) 10-character, 14-segment text display 3rd line (bottom) 5 markers to identify display in measuring mode

Housing

Material die-cast aluminium with polyurethane finish Protection category IP 67 (IEC 529 / EN 60529) equivalent to NEMA 4 and 4X

Signal cable

only for remote systems (F)

3-field LCD actual flowrate, measurement of sound velocity to determine (composition of) liquid product, forward, reverse and sum totalizer (7-digit) and status messages; each can be set for continuous or sequential display

m3, liter, US gallons per second, minute or hour, or in user-defined unit, e.g. liter/h or US gallon/day

, liter, US gallons or in user-defined unit, e.g. hecto liter or US million

m gallon (min. 1 year overflow time)

8-character, 7-segment numeral and sign display, and symbols for key acknowledgement

length up to 10 m / 30 ft (max. 20 m / 60 ft, option)

4.4 Environmental conditions

In accordance with EN IEC 61010-1 the following enviromental conditions have to be observed .

The GFM 700 is designed to operate safe under the following conditions: a) suitable for indoor and outdoor use, the housing of the signal converter is usable up to Protection Category IP67 b) IP 67 is only warranted when using suitable cabling in the cable glands c) use up to an altitude of 2000 m above see level d) suitable for an operation ambient temperature range - 40 …. +60 °C e) suitable for an storage temperature range -40 …. + 80 °C f) suitable for use in atmospheres with a relative humidity up op 80% g) mains supply voltage fluctuations up to + 13 % of the nominal voltage range h) withstands over voltages up to category II on the main supply voltage ( IEC 60364-4-443) i) connected to protective earth conductor ( Protection Class I) j) rated pollution degree 2

4.5 Dimensions and weights

Flange connections to DIN 2501 / pressure PN, s. Tabelle: dimensions b

to ANSI / class 150 lb/RF: dimensions b

DIN

ANSI

and c

maximum operation

DIN

pressure, see Sect. 4.2

ANSI

Meter size DIN

DN mm PN inches in kg

50 40 2 500 (19.69) 198 ( 7.80) 198 ( 7.80) 165 ( 6.50) 165 ( 6.50) 370 (14.57) 15 ( 33) 65 16 2 ½ 500 (19.69) 216 ( 8.50) 212 ( 8.35) 185 ( 7.28) 178 ( 7.01) 380 (14.96) 20 ( 44) 80 40 3 500 (19.69) 230 ( 9.06) 235 ( 9.25) 200 ( 7.87) 210 ( 8.27) 390 (15.35) 20 ( 44) 100 16 4 500 (19.69) 252 ( 6.66) 257 (10.12) 220 ( 8.66) 229 ( 9.02) 410 (16.14) 20 ( 44) 125 16 5 500 (19.69) 280 (11.02) 282 (11.10) 250 ( 9.84) 254 (10.00) 430 (16.93) 30 ( 66) 150 16 6 500(19.69) 312 (12.28) 310 (12.20) 285 (11.22) 280 (11.02) 460 (18.11) 35 ( 77) 200 10 8 600 (23.62) 365 (14.37) 367 (14.45) 340 (13.39) 343 (13.50) 490 (19.29) 40 ( 88) 250 10 10 600 (23.62) 419 (16.50) 425 (16.73) 395 (15.55) 407 (16.02) 570 (22.44) 45 ( 99) 300 10 12 700 (27.56) 470 (18.50) 489 (19.25) 445 (17.52) 483 (19.02) 610 (24.02) 55 (121) 350 10 14 700 (27.56) 515 (20.28) 530 (20.87) 505 (19.88) 534 (21.02) 650 (25.59) 65 (143) 400 10 16 700 (27.56) 571 (22.48) 587 (23.11) 565 (22.24) 597 (23.50) 690 (27.17) 75 (165) 450 10 18 800 (31.50) 621 (24.45) 631 (24.84) 615 (24.21) 635 (25.00) 740 (29.13) 95 (210) 500 10 20 800 (31.50) 674 (26.54) 690 (27.17) 670 (26.38) 699 (27.52) 780 (30.71) 120 (265) 550 10 22 800 (31.50) 755 (29.72) 740 (29.13) 780 (30.71) 750 (29.53) 820 (32.28) 150 (331) 600 10 24 800 (31.50) 780 (30.71) 797 (31.38) 780 (30.71) 813 (32.01) 870 (34.25) 175 (386)

to ...

Dimensions

ANSI a b

in mm and (inches)

DIN

ANSI

DIN

ANSI

Weight

approx.

Please note for compact flowmeter:

dimension “b“ see Table plus 210 mm

weight see Table plus approx. 3.0 kg

GFM 700 K Compact flowmeter GFS 700 S Primary head

GFC 700 F Signal converter GFC 700 F – EEx Signal converter

wall mounting (rotatable) wall mounting (rotatable) weight approx. 4.2 kg weight approx. 4.2 kg

5 Installation notes

Inlet run:

• downstream of a fan

• downstream of fully open control valve

• downstream of a 90° bend (elbow)

Outlet run:

Installation conditions

• downstream of a compressure or nozzle

≥ 40 x DN ≥ 30 x DN ≥ 20 x DN ≥ 20 x DN

• downstream of a reducer (α/2 < 4°)

no additional inlet run required

≥ 10 x DN (DN = meter size)

Select position such that the measuring beam is approximately horizontal. Fit the mating flanges precisely at right angles to the pipeline.

6.1 Electrical connection

• Power supply, power consumption and load rating of outputs, see “Technical data”

• Current and pulse outputs (I + P) are galvanically isolated from all input and output circuits.

• Selection of connection diagrams Standard operation EEx operation Current output 2) passive/active 1) active (also standard) Pulse output 3) passive 4) passive (also standard) Power supply and connection terminals 5) 6)

1) Current output active Standard and EEx

2) Current output passive

Standard

3) Pulse output active Standard

4) Pulse output passive Standard and EEx

≤ 680 Ω

≤ 18 V DC

ext.

≤ 680 Ω

5) Power supply connection and all outputs standard

binary

L N

oututs

current output

only internal protective conductor connection terminal

6.2 Electrical installation to the mains supply voltage

The GFM 700 is intended for permanent connection to the mains. It is required (for example for service) to mount an external switch or circuitbreaker near the product for disconnection from the mains. It must be reached easily by the operator and marked as the disconnecting device for this product. The switch or circuitbreaker has to be suitable for the application and shall also be in accordance with local (safety) requirements and requirements of the building installation.

The protective conductor clamp terminal size M5, press-fitted, in the terminal compartment (Inear the power connection terminals) shall always be connected to the protective earth conductor of the main supply. Conductors up to 4mm2 can be connected.

The diameter of the conductors of the main supply, including the protective earth conductor shall to be in accordance with the general requirements.

= 19 V − 32 V

Output

R1 ≥ 650 Ω I ≤ 50 mA EC electronic totalizer

≤ 32 V DC ≤ 24 V AC

ext.

I ≤ 150 mA EC electronic totalizer EMC electromechanical

totalizer

6) Power supply connection and all outputs EEx version

binary

L N

out

uts

current

output

power supply

protective conductor

terminal

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