• Supports up to 23 Engineering Units (including User Defi ned).
• Stores calibration data for up to 10 gases.
• Programmable Totalizer indicates total gas quantity.
• High and low gas fl ow Alarm limits with preset delay interval.
• Two sets of user-programmable electromechanical SPDT relays with latch option.
• User-selectable analog 0-5 Vdc or 4-20mA outputs.
• Internal Conversion factors for up to 32 gases.
• Digital Interface (RS-232 / RS-485, Profi bus DP available).
• Multi-Drop Capability of up to 256 units (RS-485 option).
• Optional Profi bus DP interface with I&M functionality.
• Automatic sensor zero offset adjustment (via digital interface or local push button).
• Self-Diagnostic Tests.
• Local 2 x 16 characters LCD display* with adjustable back light (optional).

FLOW MEDIUM: Please note that XFM Mass Flow Meters are designed to work only with clean gases.
Never try to measure fl ow rates of liquids with any XFM.
CALIBRATIONS: Performed at standard conditions [14.7 psia (101.4 kPa) and 70 °F (21.1 °C)] unless otherwise requested.
ENVIRONMENTAL (PER IEC 664): Installation Level II; Pollution Degree II.
FLOW ACCURACY: ±1% of FS at calibration temperature and pressure.
REPEATABILITY: ±0.15% of full scale.
FLOW TEMPERATURE COEFFICIENT: 0.15% of full scale/ °C or better.
FLOW PRESSURE COEFFICIENT: 0.01% of full scale/psi (6.895 kPa) or better.
FLOW RESPONSE TIME: 600ms time constant; approximately 2 seconds to within ±2% of set fl ow rate for 25% to 100% of full scale fl ow.
MAXIMUM GAS PRESSURE: 500 psig (3447 kPa gauge).
MAXIMUM PRESSURE DROP: 0.18 PSID (at 10 L/min fl ow). 4 psi (at 50 L/min fl ow).
See Table 10 for pressure drops associated with various models and fl ow rates.
GAS AND AMBIENT TEMPERATURE: 32 °F to 122 °F (0 °C to 50 °C). 14 °F to 122 °F (-10 °C to 50 °C) - Dry gases only.
RELATIVE GAS HUMIDITY: Up to 70%.
LEAK INTEGRITY: 1 x 10-9 smL/sec He maximum to the outside environment.
ATTITUDE SENSITIVITY: Deviation of up to 1% from stated accuracy, after re-zeroing.
OUTPUT SIGNALS: Linear 0-5 Vdc (3000 ohms min load impedance); Linear 4-20 mA (500 ohms maximum loop resistance).
Maximum noise 20mV peak to peak (for 0-5 Vdc output).
CONNECTIONS: XFM 17 and 37: 1/4" compression fi ttings. Optional: 6mm compression, 1/4" VCR® , 3/8" or 1/8" compression fi ttings.
XFM 47: 3/8" compression fi ttings.
TRANSDUCER INPUT POWER:
11 to 26 Vdc, 100 mV maximum peak to peak output noise.
 Power consumption: +12Vdc (200 mA maximum); +24Vdc (100 mA maximum);
 Circuit board have built-in polarity reversal protection, 300mA resettable fuse provide power input protection.
** FLUID CONTACT:
Aluminum Models: Anodized aluminum, brass, 316 stainless steel, Viton® O-rings.
Stainless Steel Models: 316 stainless steel, Viton® O-rings.
Optional O-ring Materials: Buna-N® , EPR® (Ethylene Propylene), or Kalrez® .
CAUTION:
Aalborg makes no expressed or implied guarantees of corrosion resistance of mass fl ow meters as pertains to
different fl ow media reacting with components of meters. It is the customers’ sole responsibility to select the
model suitable for a particular gas based on the fl uid contacting (wetted) materials offered in the different models.
DISPLAY: *Optional local 2x16 characters LCD with adjustable backlight (2 lines of text).
CALIBRATION OPTIONS: Standard is one 10 points NIST traceable calibration. Optional, up to 9 additional calibrations may be ordered at
additional charge.
CE COMPLIANCE: EMC Compliance with 89/336/EEC as amended. Emission Standard: EN 55011:1991, Group 1,
Class A Immunity Standard: EN 55082-1:1992.
* LCD display is not available for Profi bus DP interface option.
**The selection of materials of construction, is the responsibility of the customer. The company accepts no liability.

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