ONICON System-40-BAC BTU - Manual (Page 6)

11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax +1 (727) 442-5699 • [email protected]
System-40-BAC BTU Meter Manual 03/15 - 1045-2 Page 6
GENERAL SPECIFICATIONS*
CALIBRATION
Flow meter and temperature sensors are individually
calibrated to N.I.S.T and or international metrological
standards, followed by a complete system calibration. Field
commissioning is also available.
ACCURACY
FLOW
Meets EN1434 Class 1 accuracy requirements
± 1% of reading over 25:1 turndown
± 2% of reading over 100:1 turndown
Overall turndown exceeds 500:1
Repeatability: ≤ ± 0.2%
TEMPERATURE
Field serviceable MID certified matched pair of 2-wire 1000Ω
platinum RTDs
Calibrated to a differential measurement uncertainty of
± 0.18° F
Meets EN1434/C900.1 accuracy requirements for 3K sensors
CALCULATOR
Computation error: ≤ 0.09% @ 30° F ∆t
Meets EN1434 Class 1 requirements with 3K minimum ∆t
ELECTRICAL
POWER SUPPLY REQUIREMENTS
12-36 VAC, 50/60 Hz, 15 VA maximum
12-42 VDC, 15 W maximum
CLOCK /CALENDAR
Real-time clock / calendar with lithium battery back-up.
Estimated battery life ≥ 10 years
PROGRAMMING
Factory programmed for specific application. Field
programming available through the user interface or via serial
interface using a PC.
MEMORY
Nonvolatile FLASH memory retains all program parameters
and totalized values in the event of power loss.
AUXILIARY PULSE INPUTS
Three totalizing pulse inputs for use with sinking open
collector or dry contact outputs
Pulse duration: 50 ms minimum
Sinking current: 1 mA maximum
NETWORK CONNECTION
Isolated RS485 serial interface
Unit load = ¼
Recommended devices per segment = 32
MECHANICAL
FLOW SENSOR
Individually wet calibrated inline flow sensor with
direct path wetted ultrasonic flow transducers.
IP65 inline flow body with male BSPP (straight) threads.
Wetted components:
Brass (Lead free)
PEEK
EPDM (FKM optional)
METER COUPLINGS
Brass couplings with BSPP nut and male NPT threads
Wetted components:
Brass (Lead free)
EPDM (FKM optional)
TEMPERATURE SENSOR PAIR
2-wire platinum RTDs with 1.5m (4.9ft) cables
Screw in direct insertion RTDs with M10 (straight)
threads
Wetted components:
Stainless steel
CALCULATOR
Detachable enclosure with user interface and backlit
display includes a 5ft extension cable and remote
mounting bracket
IP65 polycarbonate plastic enclosure
Wetted components: None
*Specifications subject to change without notice