Dwyer 2600 - Manual (Page 28)

May, 2013 Page 28 of 52 949-1194 Rev. 7
A r t E Approach Rate Time: Select O F F , 0 . 0 1 to 9 9 . 9 9 minutes. The function defines
the amount of Rate applied when the input is outside of the Proportional Band.
The A r t E time and the r t E time are independent and have no effect on each
other. To increase damping effect and reduce overshoot set the approach rate
time for a value greater than the natural rise time of the process (natural
rise time = process value time to set point).
F i n t Fuzzy Logic Intensity: Select 0 to 1 0 0 %. 0% is OFF (disables Fuzzy Logic). The
function defines the amount of impact Fuzzy Logic will have on the output.
F b n d Fuzzy Logic Error Band: Select 0 to 4 0 0 0 °F, °C, or counts. Sets the bandwidth
of the Fuzzy Logic. Set F b n d equal to PID proportional band (P b 1 ) for best
results.
F r t E Fuzzy Logic Rate of Change: Select 0 . 0 0 to 9 9 . 9 9 counts/second. For best initial
setting, find the counts/second change of process value near Set Point 1 with
output ON 100%. Multiply this value by 3. Set F r t E to this calculated value.
P E A The Peak feature stores the highest input the control has measured since the last
reset or Power On. At Power On P E A is reset to the present input. To manually
reset the value P E A must be in the lower display. Press the ENTER key to
reset. P E A will be reset and display the present input value.
U A L The Valley feature stores the lowest input the Instrument has measured since the
last reset or Power On. At Power On U A L is reset to the present input. To
manually reset the value U A L must be in the lower display. Press the ENTER
key. U A L will be reset and display the present input value.
P c t O Percent Output Feature: Select O n or O F F .
O n
When selected O n , the HOME lower display will indicate the output of
the controller in percent. The “%” indicator lamp will light and an “ o ” will
appear in the right hand side of the lower display to indicate percent
output for SP1. An “ õ ” will appear on the right hand corner of the lower
display to represent percent output for SP2, if the control is so
equipped. The display will alternate between these values.
O F F Percent Output display is disabled.