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+0.15
SLM and still be within the stated accuracy
specification.
It0.24mA. Please note if you
get an output signal at zero flow that is within either of these
two ranges, your FMA-1900 is functioning properly. With
respect to the FMA-1900 digital readout, the accuracy is simply
1.5% times the full scale flow rate listed on the instrument data
tag. For example, if full scale is 10 SLM, the digital readout will
be accurate to fo.15 SLM, and the reading at zero flow may be
as high as
kO.075
VDC or
f0.24mA.
This means, for example, that the output signal for zero flow
can be as high as
mA
output is accurate to within
*
0.150
VDC) and the 4-20
kO.075
VDC (O-l 0 VDC accuracy
&1.5%
of full scale accuracy means the O-5 VDC output signal
is accurate to within
51.5%
of full scale, and the
effective control range of the device is 10% to 100%. The
Accuracy
The accuracy of FMA-1900 is
.l”C.
3.2
0°C
rather than 21
“C
(70°F) and 760 mm of mercury
(one atmosphere), unless you have specified otherwise in your
order.
Be sure you know the reference conditions of your
FMA-1900, because it may make a difference if you are
comparing the output of FMA-1900 with another type of flow
meter. For example, the output reading of FMA-1900 will be
approximately 7% lower if you compare it to a device that uses
a “standard” temperature of
m
Temperature and Pressure Conditions
The gas flow rate output of your FMA-1900 is referenced to
“standard” conditions of 21.1
OPERATIO N
3.1 Referencing the Flow Rate to Other