KROHNE GFM700 User Manual

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Page 1

 KROHNE 06/2003 7.30937.32.00

Variable area flowmeters

Vortex flowmeters

Flow controllers

Electromagnetic flowmeters

Ultrasonic flowmeters

Mass flowmeters

Level measuring instruments

Communications technology

Engineering systems & solutions

Switches, counters, displays and recorders

Heat metering

Pressure and temperature

Installation and operating instructions

GFM 700 K GFM 700 F

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

Ultrasonic gas flowmeter

Page 2

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

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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

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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

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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

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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

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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

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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)

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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

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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

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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

Page 12

7 Operation of the signal converter

7.1 Table of settable functions

Fct. Text Description and settings

1.0 OPERATION Main menu 1.0 Operation

1.1.0 BASIC. PARAM

1.1.1 FULL SCALE Full-scale range for flowrate Q

1.1.2 REV. SCALE Different range for reverse flow

1.1.3 REV. VALUE Full-scale range for reverse flow

1.1.4 ZERO SET. Zero setting, see Fct. 3.1.4

1.2.0 DISPLAY Submenu 1.2.0 Display

1.2.1 DISP. FLOW Unit for flowrate display,

1.2.2 DISP. TOTAL. Function of totalizer display,

1.2.3 UNIT TOTAL. Unit for totalizer display required?

1.2.4 DISP. SP. S. Display of sound velocity required?

1.2.5 CYCL. DISP. Cyclic display required?

1.3.0 CUR. OUTP. I

1.3.1 TIMECONST.I Time constant of current output I,

1.3.2 L.F.CUTOFF I Low-flow cutoff (SMU) for current

1.3.3 CUTOFF ON

1.3.4 CUTOFF OFF Cutoff “off” value SMU-I,

1.4.0 FREQ. OUTP.F Submenu 1.4.0

1.4.1 PULSRATE

or PULSE/UNIT

1.4.2 L.F.CUTOFF F Low-flow cutoff (SMU) for frequency

1.4.3 CUTOFF ON Cutoff “on” value SMU-F,

1.4.4 CUTOFF OFF Cutoff “off” value SMU-F,

2.0 TEST Main menu 2.0 Test functions

2.1 TEST DISP. Carry out display test (Sect. 7.1.1)

2.2 TEST I Test current output I (Sect. 7.1.2)

2.3 TEST F Test frequency output F (Sect. 7.1.3)

2.4

PROCESSOR

Submenu 1.1.0 Basis parameters

100%

see Fct. 3.1.1

required? See Fct. 3.1.2

, see Fct. 3.1.3

R100%

see Fct. 3.2.1

see Fct. 3.2.2

See Fct. 3.2.3

See Fct. 3.2.4

See Fct. 3.2.5

Submenu 1.3.0 Current output I

see Fct. 3.3.6

output required? See Fct. 3.3.7 Cutoff “on” value SMU-I, see Fct. 3.3.8

see Fct. 3.3.9

Frequency output F

Pulse rate for 100% flowrate or for sound velocity, see Fct. 3.4.3 or Pulse value for flowrate unit, see Fct. 3.4.3

output required? See Fct. 3.4.3

see Fct. 3.4.7

see Fct. 3.4.8

Start with → key, duration approx. 30 Sec. Test interruption with ↵ key.

• 0 mA • 4 mA • 20 mA

• 2 mA • 10 mA • 22 mA Displayed value present directly at current output. Actual value again present at output after pressing the ↵ key.

• 1 Hz • 100 Hz

• 10 Hz • 1000 Hz Displayed value present directly at current output. Actual value again present at output after pressing the ↵ key. Test microprocessor (Sect. 7.1.4) Start with ↵ key, duration approx. 2 Sec. End of test: NO ERROR or ERROR displayed.

Page 13

Fct. Text Description and settings

3.0 INSTALL Main menu 3.0 Installation

3.1.0

BASIS.PARAM.

3.1.1 FULL SCALE Full-scale range for flowrate Q

Submenu 3.1.0 Basisparameters

select from list

Unit:

100%

under Fct. 3.2.1 Value:

9.5*10-7 - 150.8 m3/Sec or

3.9 - 1,987,200 US Gal/min After selecting unit, call numerical value with ↵ key, 1st digit flashes.

3.1.2 REV. SCALE Different range for reverse flow

required? Setting NO or YES

3.1.3 REV. VALUE Full-scale range for reverse flow

(appears only if YES set under Fct. 3.2.1) Unit:

select from list under Fct. 3.2.1 Value:

9.5*10-7 - 150.8 m3/Sec or

3.9 - 1,987,200 US Gal/min Value must not be larger than that of Fct. 3.1.1! After selecting unit, call numerical value with ↵ key, 1st digit flashes.

3.1.4 ZERO SET Zero setting

• FIXED.VALUE

• VALUE.MEASU.

(Carry out only at “zero” flow and with completely filled measuring tube).

1) Inquiry: CALIB. NO or YES

2) if YES: calibration (duration

approx. 20 Sec) with zero display

in PERCENT of Q

100%

3) Inquiry: STORE NO or YES.

3.1.5 METER SIZE Meter size mm or inches

Unit: Value:

25 - 1200 mm or

0.98 - 48 inches After selecting unit, call numerical value with ↵ key, 1st digit flashes.

3.1.6 GK VALUE Primary head constant GK

(see also primary head nameplate). Range: 0.5 - 14

3.1.7 FLOW DIR Define direction of forward flow,

see Sect. 5.4. Setting:

+ or −, acc. to direction of arrow on primary head.

3.1.8 MIN SP. S. Minimum sound velocity Minimum value used for I

or F0%

(when function SOUND.VELO. selected in 3.3.1 or 3.4.1) Value:

0 to 5000 m/s

3.1.9 MAX SP. S Maximum sound velocity Maximum value used for I or F

100%

(when function SOUND.VELO. selected in 3.3.1 or 3.4.1) Value:

1 - 5000 m/s

Page 14

Fct. Text Description and settings

3.2.0 DISPLAY Submenu 3.2.0 Display

3.2.1 DISP. FLOW Unit for flowrate

• m

/Sec • Liter/Sec

• US Gal/Sec

• m3/min • Liter/min

• US Gal/min

• m3/hr • Liter/hr • US Gal/hr

• h Liter/hr or US.MGal/DAY (factory set, can be changed as required, see Fct. 3.6.6,

3.6.7+3.6.8 and Sect. 5.14)

• PERCENT

• NO DISPLAY

3.2.2 DISP. TOTAL Function of totalizer display

• + TOTAL. (forward totalizer)

• −- TOTAL. (reverse totalizer)

• +/− TOTAL. (forward and reverse totalizers, alternating)

• SUM TOTAL. (sum of + and −- totalizers)

• ALL TOTAL. (alternating, sum, + and −-totalizers)

• TOTAL. OFF (totalizer switched off)

3.2.3 UNIT TOTAL. Unit for totalizer display

• m

• Liter • US Gal

• h Liter or US.Mgal (see Fct. 3.2.1 “hLiter/hr” and “US.Mgal/DAY”)

3.2.4 DISP. SP. S Display of sound velocity (in m/s)

required? Setting: NO or YES

3.2.5 CYCL. DISP. Cyclic display required?

3.2.6 ERROR

MSG.

Setting: Which error messages to be

displayed?

NO or YES

• NO MESSAGES (no error messages)

• US ERROR (only ultrasonic errors)

• TOTAL.ERROR (only errors of internal totalizer)

• ALL ERRORS (all errors)

Page 15

Fct. Text Description and settings

3.3.0 CUR.OUTP. I Submenu 3.3.0 Current output I

3.3.1 FUNCTION I Function, current output I

• OFF (switched off)

• F/R IND. (F/R indication, e.g. for F)

• 1 DIR. (1 flow direction)

• I<I 0 PCT (Forward / Reverse flow, e.g. in 0 - 20 mA range: F=10 - 20 mA and R=10 - 0 mA)

• 2 DIR. (Forward/Reverse flow, F/R-measurement)

• SP. SOUND (sound velocity)

3.3.2 RANGE I Range for current output I, see

Sect. 5.7.2

• 0 - 20 mA

• 4 - 20 mA

• OTHER RANGE (see Fct. 3.3.3, 3.3.4 + 3.3.5)

3.3.3 I 0 PCT. Current for 0% flow (I0%)

(appears only if OTHER RANGE set under Fct. 3.3.2). Value:

00 to 16 mA

3.3.4 I 100 PCT. Current for 100% flow (I

100%

) of full-scale range (Fct. 3.1.1) (appears only if OTHER RANGE set under Fct. 3.3.2). Value:

04 - 20 mA (value must be at least 4 mA greater than that of Fct. 3.3.4).

3.3.5 I MAX mA Current limitation (I

max

) see Fct. 5.7.2 (appears only if OTHER RANGE is set under Fct. 3.3.2) Value:

04 20 mA (value must be at least 4 mA greater than that of Fct. 3.3.4).

3.3.6 TIMECONST.I Time constant of current output I Value:

0.04 - 3600 Sec

3.3.7 L.F.CUTOFF I Low flow cutoff (SMU) for current output required? Setting: NO or YES

3.3.8 L.F.CUTOFF

Cutoff “on” value for SMU-I (appears only if YES set under Fct. 3.3.7) Value:

01 - 19 PERCENT of Q

100%

(Fct. 3.1.1)

3.3.9 L.F.CUTOFF

OFF

Cutoff “off” value for SMU-I (appears only if YES set under Fct. 3.3.7) Value:

02 - 20 PERCENT of Q

100%

(Fct. 3.1.1), value must be greater than that of Fct. 3.3.8.

Page 16

Fct. Text Description and settings

3.4.0 FREQ.

OUTP.F

Submenu 3.4.0 Frequency output F

3.4.1 FUNCTION F Function, frequency output F

• OFF (switched off)

• F/R IND. (F/R indication, e.g. for I)

• 1 DIR. (1 flow direction)

• 2 DIR. (forward / reverse flow, F/R measurement)

• SP. SOUND (sound velocity)

3.4.2 PULSOUTP Unit of frequency output F

• PULSRATE (setting in pulses per unit time)

• PULSE/UNIT (setting in pulses per unit volume)

3.4.3 PULSRATE Pulse rate for 100% flowrate or for

sound velocity, see Fct. 3.1.1 or

3.1.8 + 3.1.9 (appears only if PULSRATE set under Fct. 3.4.2) Value:

2.778*10

-3

- 1000 PuLSe/Sec (= Hz) or 0.1667 - 60,000 PuLSe/min or 10 - 3,600,000 PuLSe/hr After selecting unit, call numerical value with ↵ key, 1 digit flashes.

3.4.3 PULSE/UNIT Pulse value for flowrate unit (appears only if PULSE/UNIT set under Fct. 3.4.2) Unit:

PuLSe per m3, Liter, US Gal or unit of Fct. 3.6.6, 3.6.7+3.6.8 Value:

0.0001 to 9.9999*10 (no check, but Q

PuLSe

pulse value

100%

≤ 3.600.000 pulses/hr). After selecting unit, call numerical value with ↵ key, 1 digit flashes.

3.4.4 PULSWIDTH Pulse width for frequenc ≤ 10 Hz

• 30 mSec • 200 mSec

• 50 mSec • 500 mSec

• 100 mSec

3.4.5 TIMECONST.F Time constant of frequency output F

• 40 mSec

• SAME AS I (time constant for F same as for I, see Fct. 3.3.6)

3.4.6 L.F.CUTOFF F Low-flow cutoff (SMU) for frequency output required? Setting:

NO or YES

3.4.7 CUTOFF ON Cutoff “on” value SMU-F (appears only if YES set under Fct. 3.4.6) Value:

01 - 19 PERCENT of Q

100%

(Fct. 3.1.1)

3.4.8 CUTOFF

OFF

Cuttoff “off” value SMU-F (appears only if YES set under Fct. 3.4.6) Value:

02 - 20 PERCENT of Q

100%

(Fct. 3.1.1),, value must be greater than of Fct. 3.3.8

Page 17

Fct. Text Description and settings

3.5.0 USER DATA Submenu 3.5.0 User data

3.5.1 LANGUAGE Language for display texts, see

Sect. 5.11

• GB/USA (English)

• D (german)

• F (French)

• N (Dutch)

3.5.2 ENTRY.CODE.1 Entry code 1 for setting level

required? See Sect. 5.12

• NO = Entry with  key only

• YES = Entry with  key and 9-keystroke code Setting of the code under Fct. 3.5.3

3.5.3 CODE 1 Set Code 1, see Sect. 5.12

(appears only if YES set under Fct.

3.6.2)

• Factory setting:

→, →, →, ↵, ↵. ↵, ↑, ↑, ↑

• Different code required: Press any 9-keystroke combination and then press the same combination again. Each keystroke acknowledged by “

”.

WRONG CODE appears if 1

entries are not equal.

and

Press ↵ + → keys and repeat entries.

3.5.4 LOCATION

Tag name setting (measurement point no.) max. 10 digits. Required only for flowmeters of “HHC” design (operator control via Hand-Held Communicator MIC 500, connected to current output). Factory setting:

ALTOMETER Characters assignable to each place: A..Z / a..z / 0..9 / + / -./ underscore character = blank character.

3.5.5 OUTP. HOLD Hold values of outputs during settings? Setting:

NO or YES

3.5.6 UNIT TEXT Text for user-defined unit Factory setting: hLiter/hr or US.MGal/DAY Characters assignable to each place: A..Z / a..z / 0..9 / + / −-./ underscore character = blank character. Fraction bar ”/” in 7

place is

unalternable.

3.5.7 FACT. QUANT Conversion factor for quantity FM F

= quantity per 1 m3!

Factory setting:

1.00000 E1 (for hecto Liter) or 2.64172 E-4 (for US M.gallons) Value setting:

0.00001*10

−

- 9.99999*10+9

3.5.8 FACT. TIME Conversion factor for time FT F

in seconds!

Factory setting:

3.60000 E3 (for hour) or

8.64000 E4 (for day)

Value setting:

0.00001*10

−

- 9.99999*10+9

Page 18

Fct. Text Description and settings

3.5.9 TOTAL.

RESET

3.5.10 ENABL.

RESET

3.5.11 PLAUSIB

ERR.

3.5.12 WEIGHT

P.OK

3.5.13 N.ER.PLAU

SIB.

Totalizer reset (+ and −- totalizer together) Inquiry: NO or YES

Enable totalizer reset for RESET/QUIT menu. Inquiry: NO or YES

Error limit in % of measured value for plausibility statement. Measured values that are outside the specified band are not processed. Every measured value outside the specified band will increase an internal counter by “1”, until a maximum counter value (see Fct. 3.6.13) has been reached. The corresponding measurement channel will then be made inactive and an indication will be visible on the display. Value setting: 1 - 99 PERCENT Factory setting: 20 PERCENT

Weight factor for correct measurements. The internal plausibility counter is increased by the number programmed, when the measured value is correct. The higher the number the faster an inactive channel will become active again. Value setting: 1 - 50 Factory setting: 4

Limit value for the counter of incorrectly measurements (see Fct.

3.6.11). When ‘0’ is set, the plausibility function will become inactive. Value setting: 0 - 10,000 Factory setting: 0

Page 19

7.2 Error messages

Fct. Text Description and settings

4.0 PARAM.

ERROR

4.1.0 FLOW

VELOC.

4.1.1 FULL SCALE Full-scale range for flowrate Q

4.1.2 METER SIZE Meter size, see Fct. 3.1.5

4.2.0 F/R FLOW FULL-SCALE RANGE(S) for

4.2.1 FULL SCALE Full-scale range for forward

4.2.2 REV. SCALE Different range for reverse flow

4.2.3 REV. VALUE Full-scale range for reverse flow

4.3.0 I RANGE CURRENT OUTPUT I RANGE

4.3.1 I 0 PCT Current for 0% flow (I0%), see Fct.

4.3.2 I 100 PCT Current for 100% flow (I

4.4.0 I MAXIMUM CURRENT LIMITATION

4.4.1 I 100 PCT Current for 100% flow (I

4.4.2 I MAX mA Setting of max. output current

4.5.0 LFC. I RANG. LOW-FLOW CUTOFF RANGE I

4.5.1 L.F. CUTOFF I Low-flow cutoff (SMU) for current

4.5.2 CUTOFF ON Cutoff “on” value SMU-I, see Fct.

4.5.3 CUTOFF

OFF

4.6.0 LFC. F

RANG.

4.6.1 L.F. CUTOFF F Low-flow cutoff (SMU) for

4.6.2 CUTOFF ON Cutoff “on” value SMU-F,

4.6.3 CUTOFF

OFF

Main menu 4.0 Parameter error

FLOW VELOCITY “v” incorrect: Ensure condition

0.5 m/s ≤ v ≤ 60 m/s or 1.5 ft/s ≤ v ≤ 180 ft/s is met!

see Fct. 3.1.1

100%

forward/reverse flow incorrect: Ensure condition F ≥ R is met!

flowrate Q

, see Fct. 3.1.1

F100%

required? See Fct. 3.1.2

, see Fct. 3.1.3

R100%

incorrect: Ensure condition I

100%−I0%

≥ 4 mA is met!

3.3.3

), see

100%

Fct. 3.3.4

incorrect: Ensure condition I

≥ I

100%

is met!

100%

), see

max

Fct. 3.3.4

max

see Fct. 3.3.5

incorrect: Ensure condition cutoff “off”. Cutoff “on” ≥ 1% is met!

output required? See Fct. 3.3.7

3.3.8 Cutoff “off” value SMU-I, see Fct.

3.3.9

LOW-FLOW CUTOFF RANGE F incorrect: Ensure condition cutoff “off”. Cutoff “on” ≥ 1% is met!

frequency output required? See Fct. 3.4.6

see Fct. 3.4.7 Cutoff “off” value SMU-F, see Fct. 3.4.8

Page 20

Fct. Text Description and settings

4.7.0 F > 1 kHz OUTPUT FREQUENCY too high: must be less than 1 kHz!

4.7.1 FULL SCALE Full-scale range for flowrate Q

100%

see Fct. 3.1.1

4.7.2 PULSOUTP. Unit of frequency output F, see Fct. 3.4.2

4.7.3 PULSRATE

or PULSE/UNIT

Pulse rate for 100% flowrate or for sound velocity, see Fct. 3.4.3 or Pulse value for flowrate unit, see Fct. 3.4.3

4.8.0 F <> PULSW. FREQUENCY/PULSE WIDTH ASSIGNMENT is incorrect

4.8.1 PULSOUTP. Unit of frequency output F, see Fct. 3.4.2

4.8.2 PULSRATE

or PULSE/UNIT

Pulse rate for 100% flowrate or for sound velocity, see Fct 3.4.3 or Pulse value for flowrate unit, see Fct. 3.4.3

4.8.3 PULSWIDTH Pulse width for frequencies ≤ 10 Hz, see Fct. 3.4.4

4.9.0 PULS/T.TIME Incorrect ASSIGNMENT of UNIT for F and SOUND VELOCITY

4.9.1 FUNCTION F Function of frequency output F, see Fct. 3.4.1

4.9.2 PULSOUTP. Unit of frequency output F, see Fct. 3.4.2

4.10.0 LFC.

I/T.TIME

LOW-FLOW CUTOFF I incorrect: Ensure low-flow cutoff is “off” when function of current output is sound velocity.

4.10.1 FUNCTION I Function of current output I, see Fct. 3.3.1

4.10.2 L.F.CUTOFF I Low-flow cutoff (SMU) for current output required? See Fct. 3.3.7

4.11.0 LFC.

F/T.TIME

LOW-FLOW CUTOFF F incorrect: Ensure low-flow cutoff is “off” when function of frequency output is sound velocity.

4.11.1 FUNCTION F Function of frequency output F, see Fct. 3.4.1

4.11.2 L.F.CUTOFF F Low-flow cutoff (SMU) for frequency output required? See Fct. 3.4.6

4.12.0 V.S.

min>max

MAX. SOUND VELOCITY MUST BE LARGER THAN MIN. SOUND VELOCITY.

4.12.1 MIN SP. S Minimum sound velocity, sound velocity for I

or F0%

4.12.2 MAX SP. S Maximum sound velocity, sound velocity for I

100%

or F

100%

Page 21

8. Addition for the GFM 700 F-EEx ATEX and GFM 700 HT EEx-ATEX

8.1 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.

WARNING !

No changes may be made to the devices. Unauthorized changes might affect the explosion safety of the devices.

These additional instructions are an extension to the standard Installation and Operating Instructions and only applies for the EEx version of the GFM 700 F gas flowmeter. All technical information described in the standard Installation and Operating Instructions are applicable, when not specifically excluded or replaced by the instructions in these additional instructions.

Be sure to follow these instructions !

8.2 SYSTEM COMPONENTS

8.2.1 General information

The Altosonic gas flowmeter system GFM 700 F-EEx consists of the ultrasonic gas flow sensor GFS 700 F-EEx or GFS 700 F/HT-EEx (high-temperature version) in combination with the ultrasonic gas flow converter GFC 700 F-EEx. Both the sensor and the converter can be installed in a hazardous location of Zone 1 or 2. The schematic block diagram of the gas flowmeter system is given in Figure 1 (see Section 4 Connection diagram for details).

Figure 1:

Schematic block diagram of the GFM 700 F-EEx gas flowmeter.

GFS 700 F-EEx

GFS 700 F/HT-EEx

gas flow sensor

Important

The prescriptions and regulations as well as the electrical data described in the EG certificate of conformity must be obeyed.

Beside the instructions for electrical installations in non-hazardous locations according to the applicable National standard (equivalent to IEC 364, i.e. VDE 0100) especially the regulations in EN 60079-14 “Electrical installations in hazardous locations” or equivalent national standard (e.g. DIN VDE 0165) must be followed.

Installation, establishment, utilization and maintenance are only allowed to be executed by personnel with an education in explosion safety.

Hazardous locations of Zone 1 or 2

MR04 connecting cable

Equipotential bonding

GFC 700 F-EEx

gas flow converter

Signal outputs

Power supply

Page 22

8.2.2 Gas flow sensor

There are two types of gas flow sensors, namely the GFS 700 F-EEx (standard version) and the GFS 700 F/HTEEx (high-temperature version). The GFS 700 F/…-EEx gas flow sensors are in conformance with the European Directive 94/9 EG (ATEX 100a) and approved by KEMA according to the European Standards EN 50xxx under the following number.

KEMA 00 ATEX 2119 X

The GFS 700 F/…-EEx gas flow sensors have type of protection flameproof enclosure "d" according to EN 50018 (measuring sensors) and increased safety "e" according to EN 50019 (junction box). Both types of gas flow sensors are designed for ambient temperatures (i.e. Ta) in the range of -40°C to +60°C. The maximum permissible temperature of the gas(es) to be measured is restricted by the temperature class of the explosive atmosphere that (possibly) surrounds the gas flow sensor, see therefore Table 1 and 2 below.

Temperature class

T6 80°C T5 95°C T4 130°C T3 180°C

Table 1: Temperature classification of GFS 700 F-EEx (standard).

Temperature class

T6 80°C T5 95°C T4 130°C T3 195°C T2 290°C T1 440°C

Table 2: Temperature classification of GFS 700 F-EEx (standard).

The GFS 700 F-EEx gas flow sensor is marked with the code II 2G EEx de IIC T6…T3, the high-temperature version GFS 700 F/HT-EEx bears code II 2G EEx de IIC T6…T1. See also the respective Certificate of Conformity in section 5.1 of these additional instructions.

Maximum gas temperature at Ta ≤ 60°C

8.2.3 Gas flow converter

The GFC 700 F-EEx gas flow converter also conforms to the European Directive 94/9 EG (ATEX 100a) and is approved by KEMA in accordance with the European Standards of the EN 50xxx series. The GFC 700 F-EEx has the following approval number.

KEMA 00 ATEX 2118 X

The GFC 700 F-EEx ultrasonic gas flow converter has type of protection flameproof enclosure "d" to EN 50018 (electronics compartment and optional for terminal compartment) and/or increased safety "e" according to EN 50019 (standard for terminal compartment). The flow converter is suitable for ambient temperatures in the range of -40 to +60°C and is marked with temperature classification T6, because a maximum surface temperature of 80°C (85°C minus 5 K safety margin) is not exceeded.

The GFC 700 F-EEx is marked with code II 2G EEx d IIC T6 for the terminal compartment in type of protection "d" or with code II 2G EEx de IIC T6 (terminal compartment in "e"). The Certificate of Conformity is listed in section

5.2 of these additional instructions.

Page 23

8.3 ELECTRICAL CONNECTION

8.3.1 General

The GFC 700 F-EEx gas flow converter is always connected to one of two in Section 1.2 (see previous page) described GFS 700 F/…-EEx ultrasonic gas flow sensors via the factory installed MR04 type connecting cable. Both apparatus must also be incorporated into the equipotential bonding system via respectively the external M5 clamp terminal that is pressed into the connecting flange at the bottom of the signal converter housing (of GFC 700 F-EEx) and the M8 terminal on the warning plate of the GFS 700 F/…-EEx gas flow sensor.

8.3.2 Gas flow converter

The MR04 connecting cable runs into the flameproof ("EEx d") electronics compartment through an "EEx d" approved cable gland. The cable is factory installed and tightly clamped by this gland. The gland may under no conditions be (re)assembled by the customer, because it could damage the flameproof properties of the electronics compartment.

The field cables that enter the terminal compartment of the GFC 700 F-EEx flow converter (power supply, current output and binary outputs) are non-intrinsically safe. For connection of measuring devices to the output terminals, the wiring requirements for type of protection of the compartment (standard: increased safety "e", option: flameproof enclosure "d") must be according to the international or national standard (e.g. DIN VDE 0165, section 5.6) involved.

For flameproof conduit systems, the terminal compartment must have type of protection flameproof enclosure "d" according to EN 50018. The conduits must be sealed by "EEx d" approved (within the ATEX 100a directive) sealing devices (i.e. stopping box) directly at the conduit entrances of the as flameproof enclosure performed terminal compartment.

The arrangement of the terminals in the terminal compartment is shown by Figure 2 below.

Figure 2:

Arrangement of terminals.

Pulse Status output output

B1 B- B2 I+ I L N L

BINARY CURRENT OUTPUTS OUTPUT



L

Protective conductor terminal

NOTE:

The status output is not supported by the current software yet, but will be supported by future software versions. The current and pulse output are galvanically insulated from each other as well as from all other in-

/output circuits

Page 24

≤ 150 mA

B1 B- B2



000

ext

≤ 32V

24 V

Ri ≤ 680

Ω

I+ I

Electronic or electro-mechanical totalizer

Figure 3: Passive pulse output. Figure 4: Active current output.

NOTE:

The status output (terminals B1 and B-) can only be configured as passive output, the current output (terminals I+ and I) can only be configured as active output.

See page 6 of the standard Installation and Operating Instructions for the electrical data of the available power supplies (e.g. mains voltages, etc.).

8.3.3 Replacement of electronics unit or power fuse(s)

IMPORTANT !

The following instructions must be followed carefully if the GFC 700 F-EEx gas flow converter housing has to be opened respectively closed !

Before opening:

♦ Make absolutely sure that there is no explosion hazard ! ♦ Gas-free certificate ! ♦ Make sure that all connecting cables are safely isolated from the power supply ! ♦ Allow the prescribed waiting time to elapse before opening the housing:

20 minutes for temperature class T6 11 minutes for temperature class T5

When the instructions above are strictly followed, the cover (includes a glass window) of the electronics compartment may be removed. First unscrew the recessed head screw of the interlocking device by a hollowhead screw wrench size 3, until the cover can rotate freely. Unscrew the cover with the special plastic wrench (black) that is supplied with the apparatus.

After opening:

♦ The copper grounding strip at the back of the electronics unit must be securely screwed to the housing (back-

end of electronics compartment) by screw C (see Figure 5). The electronics unit is mounted to the back-end of electronics compartment by two screws B. Before screws B and C can be accessed, the display unit must be removed via screws A.

♦ Before the cover is screwed back into the housing, the screw-thread must be clean and well-greased with

an acid and resin-free grease, e.g. silicone grease.

♦ Screw the cover as tight as possible into the housing by hand, until it cannot be opened by hand anymore.

Screw the recessed head screw of the interlocking device tight.

Page 25

Copper earth strip

Display unit

Flat cable of display unit

Figure 5: Display unit (left) / Electronics unit after removal of display unit (right).

8.3.4 Replacement of electronics unit

See the standard Installation and Operating Instructions for detailed information about resetting and reprogramming the new electronics unit after replacement. Important customer specific data (like the value of the internal totalizer) should be noted before replacing the electronics unit !

Before commencing work, note the instructions in Section 2.3 ("Before opening"). Then continue as follows:

1. Remove the cover of the electronics compartment.

2. Unscrew the two screws A of the display unit and turn display unit carefully aside or remove the unit completely by taking out the flat cable connector.

3. Unscrew the two mounting screws B of the electronics unit as well as screw C, which fixes the copper earth strip at the back of the housing. A screwdriver with a long shaft (200 mm) can best be used to unscrew C (e.g. screwdriver type Philips No. 2).

4. Pull the electronics unit carefully out of the converter housing, till the SMB connectors of the coaxial cables can be unplugged easily. Then remove the complete electronics unit.

5. Check the new electronics unit if the voltage setting (only applicable for AC supplies) and power fuse rating are correct. Change the voltage setting (see section 2.3.3) or exchange the fuse if necessary.

6. Carefully insert the electronics unit till the numbered SMB connectors can be connected to the corresponding numbered SMB receptacles on the electronics unit. Then mount the unit completely into the housing and fix the screws. First C, then B and finally screw the display unit on the electronics via screws A, after the flat cable connector is connected.

7. Screw the cover of the electronics compartment back into the housing.

Note the instructions of section 2.3 ("After opening") during reassembling.

IMPORTANT !

Carefully keep the coaxial cables to the side of the housing, while inserting or removing the electronics unit into respectively from the converter housing. This is to prevent damaging of the coaxial cables !

Page 26

8.3.5 Replacement of power fuse(s)

a) AC versions 115/230 VAC and 100/200 VAC

Before commencing work, note the instructions in Section 2.3 ("Before opening"). Then continue as follows:

1. Remove the cover of the electronics compartment.

2. Unscrew the two screws A of the display unit and turn the display unit carefully aside.

3. The fuse-holder in which the power fuse is mounted is accessible now to exchange the defect power fuse F1 for one with the same rating. The rating depends on the voltage of the mains (T200mA for 100/115VAC and T125mA for 200/230 VAC setting). See also the yellow sticker on the mains transformer as shown in Figure 6 below.

4. Reassemble in reverse order (points 2 and 1).

Note the instructions of section 2.3 ("After opening") during reassembling.

Mains transformer

115/230 V

version

Sticker with fuse rating

Mains fuse F1 (in fuse-holder)

Voltage selector

Indication of

voltage selector

(black dot = notch)

SIDE OF DISPLAY UNIT

Figure 6: Power supply 115/230 VAC.

b) 24 VAC/DC version

Before commencing work, note the instructions in Section 2.3 ("Before opening"). Then continue as follows:

1. Remove the cover of the electronics compartment.

2. Unscrew the two screws A of the display unit and disconnect the display unit via the flat cable connector (see right picture of Figure 5 on the previous page).

3. Unscrew the copper earth strip (screw C) with the and the mounting screws B of the electronics unit. Pull the unit out until the SMB connectors of the coaxial cables can be disconnected from the electronics. Then take out the complete electronics unit. Be careful with the coaxial cables, so that they do not damage while removing the electronics unit from the flow converter housing. Continued on the next page !

Page 27

4. The power fuses F1 and F2 (see Figure 7 below) can be replaced now. The 24 VAC/DC power supply uses two sub-miniature fuses of T1.25A in accordance with IEC 127-3.

5. Reassemble in reverse order (points 3 through 1).

Note the instructions of section 2.3 ("After opening") during reassembling.

Location of power fuses

(see detail in Figure 8)

Figure 7: GFC 700 electronics unit with 24 VAC/DC power supply.

Figure 8: Location of fuses F1, F2 on 24 VAC/DC unit.

Page 28

8.3.6 Changing power supply voltage (not for 24 VAC/DC version)

Before commencing work, note the instructions in Section 2.3 ("Before opening"). Then continue as follows:

1. Remove the cover of the electronics compartment.

2. Unscrew the two screws A of the display unit and turn display unit carefully aside or remove the unit completely by taking out the flat cable connector.

4. Pull the electronics unit carefully out of the converter housing, till the SMB connectors of the coaxial cables can be unplugged easily. Then remove the complete electronics unit.

5. The voltage setting of the power supply can be changed by turning the dummy dual-in-line block (i.e. voltage selector, see Figure 6 on page 6) over 180° in its socket. The position of the notch on the dummy dual-in-line block indicates the voltage setting. Also see the sticker that is mounted on the mains transformer (see Figure

6).

6. Carefully insert the electronics unit back into the housing until the numbered SMB connectors can be connected to the corresponding numbered SMB receptacles on the electronics unit. Then mount the unit completely into the housing and fix the screws. First C, then B and finally screw the display unit on the electronics via screws A, after the flat cable connector is connected.

7. Screw the cover of the electronics compartment back into the housing.

Note the instructions of section 2.3 ("After opening") during reassembling.

IMPORTANT !

8.3.7 Gas flow sensor

The gas flow sensor is available in two designs, the GFS 700 F-EEx (standard) for gas temperatures up to a maximum of 180°C and the GFS 700 F/HT-EEx (high-temperature) for higher gas temperatures. Both types are connected to a GFC 700 F-EEx gas flow converter via a MR04 connecting cable (i.e. four RG 179 B/U coaxial cables with additional insulation). Each coaxial cable is marked by a number "1" to "4". The core of each cable is connected to a "EEx e" approved terminal in the terminal box of the flow sensor. The core of the cable with number "1" is connected to the terminal marked with number "21", the screen is connected to the adjoining terminal with number "1". Core number "2" is connected to terminal number "22", etcetera. An equipotential bonding conductor must interconnect the flow sensor to the gas flow converter (see section 2.5 below).

8.3.8 Equipotential bonding system

The equipotential bonding conductor consists of a insulated copper wire with a minimum cross-sectional area of 4

(AWG 10). One side of the wire is connected to the external M5 clamp terminal on the connecting flange at

the bottom of the converter housing, the other end is screwed to the M8 bolt/nut terminal on the warning plate of the gas flow sensor. This end of the cable is therefor provided with a eye cable tag.

8.3.9 Maximum length of connecting cable

The maximum length of the connecting MR04 cable between the GFC 700 F-EEx gas flow converter and the GFS 700 F/…-EEx gas flow sensor is standard limited at 10 m (30 ft) due to measurement technical reasons. Longer cables on request, but must be evaluated first.

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8.4 CONNECTING CABLES

NOTE:

The below described cables are shown in the connection diagram on the following page.

Cable A:

Quad coaxial cable Type MR04 (to be supplied by Krohne Altometer)

Technical data:

Test voltage ≥ 500 V Diameter of strand (core and screen) ≥ 0.1 mm Distributed capacitance (core/screen) 67 pF/m Distributed inductance (core/screen) 0.4 µH/m

Cable B:

Power supply cable Cable parameters must be in accordance with the regulations in the EN 60079-14 "Electrical installations in hazardous locations" or an equivalent national standard (e.g. DIN VDE 0165).

Rated voltage ≥ 500 V

Examples: H07..-., H05..-.

Cable C:

Signal cable for current output and binary outputs (pulse and status output). Cable parameters must be in accordance with the regulations in the EN 60079-14 "Electrical installations in hazardous locations" or an equivalent national standard (e.g. DIN VDE 0165).

Bonding conductor:

Minimum cross-sectional area 4 mm

(AWG 10)

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