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60
With the power to the unit, and NO flow through the
flowmeter, the pulse output frequency should be 0. If the output
pulse frequency is greater than 0, input noise may be present.
Slowly turn the SENSITIVITY threshold control
counterclockwise until a pulse rate of 0 is indicated.
Turning the SENSITIVITY control fully counterclockwise will render the unit
inoperative,
3.3 GENERAL OPERATION
Apply power to the unit (8-35 Vdc).
The FLSC-51/51B will output the desired units of pulses per
unit volume established by the calibration setup procedure (see
Section 4).
Pulses output begins automatically when flow through the
flowmeter commences.
3.4 CONTROLS AND ADJUSTMENTS (See Figure3-2.)
SENSITIVITY A multiple turn control used to set the
trigger level above the noise level.
SYSTEM FACTOR A thumbwheel switch array composed
IS. F.) of four switches which are used to set
the desired scaling factor (.0000 to
.9999). Used in conjunction with the
System Factor Multiplier.
SYSTEM FACTOR A dip switch used to enter the desired
MULTIPLIER system factor multiplier (1, .1, .01,
(S. F. M.) .001, .0001). Used in conjunction with
the system factor.
(S.F.) x (S F M ) -= 1
K1
NOTE
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