Model FT2 101364
Then select either FLO (F1) or TMP (F2) for flow rate or temperature channel.
SET 4-20 MA
FLO TMP EXIT
F1 F2 F3 F4
20 mA = 3751 SCFM
CHG OK
F1 F2 F3 F4
Enter the value for the 20 mA and press OK (F4) key to accept setting.
Then the following screen will show:
4 mA = 0 SCFM
CHG OK
F1 F2 F3 F4
Enter the value for the 4 mA and press OK (F4).
Note: 4 mA is normally set to 0.
Press EXIT (F4) repeatedly until “Normal Mode” is seen briefly to exit the programming mode.
Note: When the flow rate exceeds the programmed value for the 20 mA set point, the analog
output will stay at 20 mA and an alarm code will be generated.
4.1.4. Frequency Output
The frequency output can be configured in three different ways: (1) specifying a maximum
frequency to a defined maximum value of flow rate, (2) specifying how many flow unit total per
pulse, U/P (i.e. 0.1 lb per pulse) or (3) specifying how many pulses per unit, P/U, of mass. All
these approaches are equivalent.
From the base screen, press I/O (F1) and then FEQ (F2)
FREQUENCY OUTPUT
P/U U/P FEQ EXIT
F1 F2 F3 F4
Use P/U (F1) to enter pulse per unit, U/P (F2) for Unit per pulse and FEQ (F3) to enter the flow
and maximum frequency to scale the frequency output.
Page 30 Fox Thermal Instruments, Inc., 399 Reservation Road, Marina, CA 93933
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