Aalborg GFC - Manual (Page 11)

LEAK INTEGRITY: 1 x 10 -7 sccs He max to the outside environment.
ATTITUDE SENSITIVITY: No greater than ±15 degree rotation from horizontal. Standard
calibration is in horizontal position.
OUTPUT SIGNALS: Linear 0 to 5 VDC (1000
Ω minimum load impedance) and 4 to 20
mA (0 to 500
Ω loop resistance); 20 mV peak to peak max noise for GFC 17/37/47 and
100 mV peak to peak max noise for GFC 57/67/77.
263COMMAND SIGNAL: Analog 0 to 5 VDC (100 K minimum input impedance) or 4 to 20
mA (250
Ω input impedance).
Contact your distributor or Aalborg
7 for optional RS232 or IEEE488 interfaces.
TRANSDUCER INPUT POWER: +12 VDC, 800 mA maximum; OPTION +24 VDC, 650 mA
maximum - IF SPECIFIED AT TIME OF ORDERING AND CONFIGURED ACCORDINGLY.
WETTED MATERIALS:
GFC17/37/47/57/67/77: Anodized aluminum, brass, 416 Stainless Steel and 316 stainless
steel with VITON
7 O-rings seals; BUNA-N7, EPR or KALREZ7 O-rings are optional.
GFC17S/37S/47S/57S/67S/77S: 416 Stainless Steel and 316 stainless steel with VITON
7
O-rings seals; BUNA-N
7, EPR or KALREZ O-rings are optional.
Aalborg
7 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.
CONNECTIONS:
GFC 17 and 37: 1/4" compression fittings. Optional: 6mm compression, 1/4" VCR
7,
3/8" or 1/8" compression fittings.
GFC 47: 3/8" compression fittings.
GFC 57 3/8" compression fittings.
GFC 67: 1/2" compression fittings.
GFC 77: 3/4" FNPT fittings. Optional: 3/4" compression fittings.
LCD DISPLAY: 3½ digit LCD (maximum viewable digits “1999”), 0.5 inch high characters.
On GFC171, GFC371, GFC471, GFC571, GFC671, GFC771 aluminum or stainless steel mod-
els 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.
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
7 when non-standard display settings are desired.
TRANSDUCER INTERFACE CABLE: Optional shielded cable is available mating to the GFC
transducer 15-pin “D” connector.
7