Pulsafeeder ELMA NEMA 4X, Инструкция по установке, эксплуатации и обслуживанию

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5.3 Deadband
See figures 3 & 4
Adjustment of the deadband determines how closely the comparator circuit will
attempt to match the feedback signal to the input signal. It provides a “window” of
acceptable voltage tolerances.
Example
If the deadband is too loose the comparator circuit is not as sensitive to signal
change and may not fully adjust to the change of an input signal.
If the deadband is too tight the comparator circuit may constantly “hunt” causing
erratic actuator movement with no change to the input signal.
Deadband adjustments are preset at the factory. If adjustments to the deadband
have been unsuccessful you can go back to factory preset by turning the trim
potentiometer screw ten times (CCW) “counter-clockwise” then one turn (CW)
clockwise.”
5.4 Meter Readout
See figures 3 & 4
a. Put proper load and/or meter across TB1-7 as (+) and with TB1-8 as (-),
for a 4-20 mA signal.
b. With the micrometer hand knob at 0%, adjust the zero adjust so that 4 mA
is output from the circuit and/or meter reads minimum.
c. With the micrometer hand knob at 100% adjust the span adjust so that 20
mA is output from the circuit and/or meter reads maximum.