Hydrostatic Tank Gauging

Accurate direct mass measurement.

Hydrostatic Tank Gauging (HTG) offers direct mass

measurement in connection with high accuracy hydrostatic

pressure transmitters. Honeywell Enraf HTG supports

transmitters which use HART or Foundation Fieldbus protocol,

allowing connection to any preferred pressure transmitter.

Such a transmitter near the bottom of the tank measures the

static head of the liquid (optional requirement can be to add a

pressure transmitter to compensate for vapour pressure). The density is then determined

by adding a second pressure transmitter at a known distance above the fi rst transmitter.

A temperature measurement near the transmitters where the density is determined can be

added for calculation of density at reference temperature. Tank data from the HTG system is

gathered and transmitted by the Field Display and Interface unit to a supervisory system.

Technical specifications Hydrostatic Tank Gauging

Measuring specifications

Accuracy * : For mass Inventory < 0.04 %

Transfer < 0.03 %

Principles

Measuring principle : Hydrostatic differential pressure measurement

Field Display & InterfaceDisplay

Type : LCD contrast adjustable, 2 lines, 16 alphanumeric characters per line

Mechanical

Dimensions (w x h x d) : 208 mm x 198 mm x 300 mm (8.2” x 7.8” x 11.9”)

Weight : 12 kg (26 lb)

Cable entries : 3 pcs 3/4” NPT threaded (Ex d glands or sealed conduit may be required)

Environmental

Ambient temperature : - 40 °C to + 60 °C (- 40 °F to + 140 °F)

Protection class : IP 67 / NEMA 6P

Safety : Explosion proof II 2 G EEx d IIB T6 or EEx d [ia/ib] IIB T6 according to ATEX

- Class I, Division 1, Groups B, C and D, in acc. to NFPA 70 (FM, USA)

Materials

Housing : Chromatized cast aluminum Int. reg. AA A356 G.Al.Si.7Mg wa (3.2371.61) DIN 1725

O-rings : Cover Silicone / FEP (other NBR 70)

Electrical

Power supply : 10/130/220 V (+10% to -20%) and 230 V (±15%), optional 65 V (+10% to -20%),

also suitable for 240 V (+10% to -20%)

Power rating : 20 VA, Imax - 2 A

Isolating voltage : > 1.500 V

Lightning protection : Full galvanic separation via isolating Transformers

Options

For options see Product sheet Field Display & Interface

Hydrostatic pressure transmitterAdvised specifications for installations up to 0.2 MPa (29 psi)

Type : Intelligent digital hydrostatic pressure transmitter

Range : P 1 and P 2 = up to 5 bar / 0.5 MPa (72,5 psi), P3 = up to 0.1 bar / 0,01 MPa (1,45 psi)

Mechanical

Flanges : 2” 150 lbs ANSI, rf or 2” 300 lbs ANSI rf or

3” 150 lbs ANSI, rf or 3” 300 lbs ANSI, rf for other tank connections contact Honeywell Enraf

Environmental

Ambient temperature : - 40 °C to + 60 °C (- 40 °F to + 140 °F)

Product temperature : - 40 °C to + 120 °C (- 40 °F to + 248 °F)

Protection class : IP 65, (NEMA 4X)

Safety : Intrinsically safe for connection to FDI

- II 1 G EEx ia II according to ATEX

- Class I, Division 1, Groups A, B, C and D, in acc. to NFPA 70 (FM, USA)

Materials

Housing : Weather proof IP 67

Electrical

Power supply : Intrinsically safe from Field Display & Interface via the two transmission lines

Transmission

Type : HART protocol (for Foundation Fieldbus, please consult factory for the best system architecture)

Cabling (transmitter-FDI) : Advise < 50 m however depending on type of cable. Twisted pair, shielded.

*) Under reference conditions and a full tank. For other accuracy information see our brochure Hydrostatic Gauging Systems.

Accuracy pressure transmitter ± 0.02%

Identification code

Pos 1 ApplicationU General purposeX W&M certified

Pos 2 Data transmissionE Enraf Biphase mark protocol (standard)R RS232C GPU protocol (only when Pos 3 = B, C, J, U or Z)S RS485 GPU protocol (only when Pos 3 = B, C, J, U or Z)V RS232C standard Modbus (only when Pos 3 = B, C, J, U or Z)W RS485 standard Modbus (only when Pos 3 = B, C, J, U or Z)

Pos 3 I/O optionsC VITO temperature and/or water probeJ VITO temperature and/or water probe + HART device(s)U Spot temperature Pt100 + HART device(s)Y Analog level output + spot temperature Pt100 + VITO temperature and/or water probe + HART device(s)

Pos 4 Alarm relay and fallback relayF With alarm relay and fallback relayZ Without alarm relay and fallback relay

Pos 5, 6, 7 Instrument designation8 7 7 Field Display & Interface

Pos 8 Mains supplyA 220V 50/60 HzC 110V 50/60 HzK 230V 50/60 HzR 130V 50/60 HzS 65V 50/60 Hz

Pos 9 ApplicationT HTG U HTG with water probe if Pos 3 = C, J or Y

Pos 10 Safety approvalsA ATEX EuropeC CSA CanadaF FM USA

For other approvals please contact your nearest Honeywell Enraf office

U E C F 8 7 7 K T A Typical identification code

8 7 7 Your identification code

Configuration

EN-09-39-ENGDecember 2009© 2009 Honeywell International Inc.

For More InformationTo learn more about Honeywell Enraf’ssolutions, contact your Honeywell Enraf account manager or visit www.honeywellenraf.com.

AmericasHoneywell Enraf Americas, Inc.2000 Northfield Ct.Roswell, GA 30076 USAPhone: +1 770 475 1900Email: enraf-us@honeywell.com

Europe, Middle East and AfricaHoneywell EnrafDelftechpark 392628 XJ DelftThe NetherlandsPhone: +31 (0)15 2701 100Email: enraf-nl@honeywell.com

Asia PacificHoneywell Pte Ltd.17 Changi Business Park Central 1Singapore 486073Phone: +65 6355 2828Email: enraf-sg@honeywell.com

Temperature

P3

P2

P1

FDI

FDI

P2

P1

Temp.