Onicon System-10 BTU Manual do Utilizador descarregar pdf (Página 6)

11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax (727) 442-5699 • [email protected]

System-10 BTU Meter Manual 03/15 - 0651-16 / 18323 Page 6

GENERAL SPECIFICATIONS

CALIBRATION

Flow meter and temperature sensors are individually

calibrated, followed by a complete system calibration.

Field commissioning is also available.

ACCURACY

Differential temperature accuracy ±0.15° F over

calibrated range

Computing non-linearity within ±0.05%

Analog outputs: ±0.1% of full scale

TEMPERATURE SENSORS

Solid-state sensors are custom calibrated using N.I.S.T.

traceable temperature standards.

Current based signal (mA) is unaffected by wire length.

PROGRAMMING

Factory programmed for specic application.

MEMORY

Nonvolatile EEPROM memory retains all program

parameters and totalized values in the event of

power loss.

DISPLAY

Alphanumeric LCD displays total energy, total ow,

energy rate, ow rate, supply temperature, return

temperature. serial number and alarm status

Alpha: 16 character, 0.2” high

Numeric: 6 digit, 0.4” high

Rate Display Range: 0 - 9,999,999

Total Display Range: 0 - 9,999,999

The totals will roll over to zero when the maximum

count is exceeded.

OUTPUT SIGNALS

Standard: Isolated solid-state dry contacts for energy total

Maximum contact ratings: 100 mA, 50 VDC

Contact duration: 0.5, 1, 2 or 6 seconds

(factory selectable)

Optional: Multiple isolated analog outputs for energy rate,

ow rate, supply and return temperature and delta

temperature (factory selectable)

Output type: 4-20 mA, 0-10 V or 0-5 V

(eld selectable)

Optional Interval Data Logging: This option

provides up to 24 hours of rate and total data

logging in 15 minute intervals. Data includes

date/time stamp, measured value & scaling

factors when appropriate.

Network Interface Options:

MODBUS RTU RS485

MODBUS RTU TCP/IP

BACnet MS/TP

BACnet UDP/IP

LONworks FTT10A

JCI Metasys - N2

Siemens Apogee - P1 FLN

LIQUID FLOW SIGNAL INPUT

Standard: 0-15 V pulse output from any ONICON ow meter

Optional: 4 - 20 mA analog output from any ow meter

TEMPERATURE RANGE

Liquid temperature range: 25° to 200°F

Ambient temperature range: -20° to 140° F

MAINTENANCE

ONICON recommends periodic inspection and recalibration

for sensors connected to the System-10 BTU Meter. No

other periodic maintenance is required for the main unit.

MECHANICAL

ELECTRONICS ENCLOSURE:

Standard: Steel NEMA 13, wall mount, 8”x10”x 4”

TEMPERATURE THERMOWELLS:

Standard: ½” NPT brass thermowells (length varies with

pipe size) with junction box

Note: 6” pipes and larger require SS thermowell option

Optional:

• ½” NPT stainless steel thermowells

• Outdoor junction box with thermal isolation

• Hot tap thermowells for installations in a

pressurized system with no shutdown

ELECTRICAL

This equipment is intended for INSTALLATION CATEGORY

(OVERVOLTAGE CATEGORY) II applications.

INPUT POWER:

Factory Selectable:

24 VAC: 20 - 28V, 50/60 Hz, 500 mA

120 VAC: 108 - 132V, 50/60 Hz, 250 mA

240 VAC: 207 - 253V, 50 Hz, 250 mA

INTERNAL FUSE RATING:

24 VAC - 1 Amp Slo-Blo, 3AG Fuse

120 VAC - 1/4 Amp Slo-Blo, 3AG Fuse

240 VAC - 1/8 Amp Slo-Blo, 3AG Fuse

OUTPUT:

24 VDC, 250 mA maximum

OVERCURRENT PROTECTIVE DEVICE RATINGS:

Supply mains overcurrent protective devices with the

following ratings:

120 VAC 50/60 Hz – 15 A

240 VAC 50 Hz – 6 A

WIRING:

Temperature signals: Use 18-22 ga twisted shielded pair

Flow signals: Use 18-22 ga shielded cable – see ow

meter specication sheet or ow meter manual for

the correct number of conductors.

24 VAC input power: Use PVC jacketed copper cable

with a wire gauge suitable for the length of run and

required maximum current carrying capacity. The

installation must comply with all local, state and

federal building codes.

120/240 VAC input power: Use a three wire service with one

wire a protective earth ground. The installation must

comply with all local, state and federal building codes.

Note: Specications are subject to change without notice.

WARNING

All electrical connections must be made in

accordance with the imformation provided

here. Failure to do so will result in an

increased risk of injury.

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