1.3 STANDARD FEATURES AND SPECIFICATIONS
CALIBRATION
Every ONICON thermal mass flow meter is wet calibrated in a flow laboratory against standards that are directly
traceable to N.I.S.T. A certificate of calibration accompanies every meter. Each meter is calibrated for use with a specific gas.
Standard Reference Conditions for Natural Gas:
Standard Reference Conditions for Air:
Fluid: Methane
Fluid: Air
Fluid Temperature: 60°F
Fluid Temperature: 70° F
Fluid Pressure: 29.92” Hg (14.70 PSIA)
Fluid Pressure: 29.92” Hg (14.70 PSIA)
Contact ONICON for reference conditions for other fluid types.
ACCURACY
Natural Gas
± 1.0% of reading from 500 – 7000 SFPM
± 2.0 % of reading from 100 – 500 SFPM
Compressed Air & other high velocity calibrations
± 1.0 % of r 0.5% of scale over a
100:1
turndown
OVERALL FLOW RANGE
5 to 35,000 SFPM
SENSING METHOD
Thermal mass flow utilizing hybrid analog/digital sensing circuitry, no moving parts
INPUT POWER
Standard: 24 VDC ±10%, 100 mA maximum current
Optional: 90-265 VAC, 50/60 Hz
Optional: 12 VDC ±10%, 200 mA maximum current
FLUID TEMPERATURE RANGE
Standard: -40° to 200° F
Optional: 200° to 300° F
Optional: 300° to 450° F
Optional: 450° to 700° F
AMBIENT TEMPERATURE RANGE
-5° to 150° F
MAXIMUM OPERATING PRESSURE
Standard: 500 PSI
Optional: 1,000 PSI
MATERIALS OF CONSTRUCTION
Wetted metal components - 316L stainless steel
Sensor head - Platinum windings encapsulated in 316L stainless steel
Electronics enclosure - Powder coat painted cast aluminum
Remote mount enclosure - Cast aluminum
ENCLOSURE RATING
Weathertight, NEMA 4 (All versions)
APPROVALS
Integral and remote mount (24 VDC only) Class 1, Division 2, Groups B, C, & D,
(ATEX: Ex nA IIC T4X)
ELECTRICAL CONNECTIONS
Enclosed terminal blocks, cable access through two ½” NPT conduit fittings
PROGRAMMING / MEMORY
Factory programmed for specific application.
Non-volatile memory retains all program parameters and totalized values in the event of power loss.
OUTPUT SIGNAL(S)
Analog output: 4-20 mA
Scalable pulse output: Active 24 VDC pulse, 500ms duration
DISPLAY
Graphic OLED display indicates:
Bar graph indicating percentage of full scale flow
Flow rate: 7 digits
Flow total: 9 digits (Total rolls over to zero when maximum count is exceeded)
Fluid temperature: 3 digits
mWatts of energy used to heat flow sensor: 4 digits
Engineering units for rate and total
| sales@mvandc.com | Phone: 877.566.3837 | Fax: 925.407.2903
