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TRANSDUCER INPUT POWER:
+12 VDC, 200 mA maximum; +24 VDC optional.
Power input is protected by a 750mA M (medium time-lag) resettable fuse, and a rectifier
diode for polarity protection.
WETTED MATERIALS:
GFM17/37/47/57/67/77:
Anodized aluminum, brass, and 316 stainless steel with
VITON
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O-rings seals; BUNA
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, NEOPRENE
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or KALREZ
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O-rings are optional.
GFM17S/37S/47S/57S/67S/77S:
316 stainless steel with VITON
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O-rings seals; BUNA
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,
NEOPRENE
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or KALREZ
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O-rings are optional.
Aalborg
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makes no expressed or implied guarantees of corrosion resistance of mass flow
meters as pertains to different flow media reacting with components of meters. It is the
customers' sole responsibility to select the model suitable for a particular gas based on the
fluid contacting (wetted) materials offered in the different models.
INLET AND OUTLET CONNECTIONS:
GFM17 /GFM37 - 1/4" compression fittings
GFM47 /GFM57 - 3/8" compression fittings
GFM67
- 1/2" compression fittings
GFM77
- 3/4" FNPT fittings
LCD DISPLAY:
3½
digit LCD (maximum viewable digits “1999”), 0.5 inch high characters.
On GFM171/371/471/571/671/771 aluminum or stainless steel models the LCD display is
built into the upper block element and may be tilted over 90 degrees for optimal viewing
comfort. Remote or panel mounting remote reading is optional.
Standard readings are in direct engineering units for the given gas and flow rate (i.e. stan-
dard liters/minute [slpm], standard cubic centimeters/minute [sccm], standard cubic
feet/hour [scfh], etc.). 0 to 100% LCD calibration scaling is available upon request at time of
order. Contact your distributor or Aalborg
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when non-standard display settings are desired.
TRANSDUCER INTERFACE CABLE:
Optional shielded cable is available mating to the GFM
transducer 9-pin “D” connector. [Cable length may not exceed 9.5 feet (3 meters)].
4.1
CE Compliance
Any model GFM bearing a CE marking on it, is in compliance with the below stat-
ed test standards currently accepted.
EMC Compliance with 89/336/EEC as amended; Emission Standard: EN 55011:1991, Group 1, Class
B Immunity Standard: EN 55082-2:1992
