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 first 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.
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Hydrostatic Tank Gauging
Accurate direct mass measurement.
Hydrostatic Tank Gauging (HTG) offers direct mass
measurement in connection with high accuracy hydrostatic
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