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setpoint
commands are available.
mA
f2%
of
full scale.
Either O-5 VDC (O-10 VDC optional) or 4-20
setpoint within one
second to 63% of final value, and within five seconds to
setpoint
causes a flow condition equivalent to 100% of flow to occur.)
When the command (setpoint) signal is applied, the flow
controller will respond to changes in the
setpoint
causes a condition of 0% flow to occur and a 5.00 VDC
O-100%
of the mass flow full scale value. (A 0 VDC
setpoint input signal is a direct linear representation of
Setpoint Input Signal
The
3.8
mA
output accommo-
dates a load resistance of up to 1000 Ohms at 24 VDC and
500 Ohms at 15 VDC.
O-100%
mass flow full scale range. The O-5
VDC (and O-10 VDC optional) output requires a minimum load
resistance of 2000 Ohms, while the 4-20
mA
signal that corresponds
linearly to the
(k15”)
with the enclosure standing up. If your actual installation
position is different, you will have to make a zero adjustment.
NOTE: The zero value may shift and be more pronounced
when under pressure and when mounted in different positions.
Output Options,, Meters and Controllers
The standard output for all FMA-1900 controllers is either a O-5
VDC (O-l 0 VDC optional) or 4-20
setpoint potentiometer is used when you are not
using an external setpoint. Turning the potentiometer clock-
wise increases the setpoint.
Mounting Position
Unless specified otherwise, your FMA-1900 has been cali-
brated for installation with the flow section in a horizontal plane
fl.5%
of scale, you may adjust the zero potenti-
ometer when you are absolutely certain that the system has
reached its normal operating temperature and there is zero
flow at the desired pressure and orientation.
The local
setpoint
potentiometers are accessed through
ports marked on the front of your FMA-1900. If the zero output
is more than
Setpoint Adjustments
The zero and local
Zero and Local