Omega FMA 1500 - Manual (Page 20)

FIGURE 7-1, CALIBRATION POTENTIOMETER LOCATIONS
7.2 Calibration of FMA 1500 Mass Flow Meters
All adjustments in this section are made from the outside of the meter, there is no
need to disassemble any part of the instrument.
FMA 1500 Mass Flow Meters may be field recalibrated/checked for the same
range they were originally factory calibrated for. When linearity adjustment is
needed, or flow range changes are being made proceed to step 7.3. Flow range
changes may require a different Restrictor Flow Element (RFE). Additionally, a dif-
ferent Solenoid Valve Orifice for the FMA 1400 Mass Flow Controller (see Table VI)
may also be required. Consult Omega
7 for more information.
7.2.1 Connections and Initial Warm Up
Connect the multimeter to output pins* [2] and [3] of the 15-pin “D” connector for
0-5 VDC (or pins [5] and [15] for optional 4-20 mA) (see Figure 2-3).
* If you are calibrating a Mass Flow Meter System that incorporates a
FMA14PD Series Command Module, the multimeter may be connected via
the DATA connector which is located at the back of the Command Module.
Power up the Mass Flow Meter for at least 30 minutes prior to commencing the
calibration procedure.
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