Westlock K20 - Forward Gain; Reverse Gain; Drop off; Zero Position

WESTLOCK CONTROLS
280N MIDLAND AVENUE, STE.258, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.westlockcontrols.com
12/20/2017 TECH-533/ D.W.O. 22902 Page 12 of 20
4.4.1 Forward Gain (FWGN XX) is the gain applied when opening the valve.
o The LCD shows “FWGN xx” where xx is the current gain.
o Pressing the DOWN Key decreases the gain
o Pressing the UP Key increases the gain
4.4.1 Reverse Gain (RVGN XX) is the gain applied when closing the valve.
The LCD shows “FWGN XX” press the CAL Key again and the LCD shows “RVGN XX”.
RVGN xx changes can now be made.
Pressing the DOWN Key decreases the gain
Pressing the UP Key increases the gain
4.4.2 Drop off (DR ENABL or DR DISAB) - Enables or Disables Drop off at end of travel
The LCD shows “RVGN XX” press the CAL Key again and the LCD shows either “DR ENABL
or DR DISAB” . DR ENABL or DR DISAB can now be selected.
Pressing the DOWN or UP Key toggles this setting.
4.4.3 Zero Position (ZERO XX) - Adjusts the electronic stop away from (increasing values) or
towards (decreasing values) from the physical closed position. 0 being nominally the
position of the hard stop zero and 100 being about 90 degrees away from it
The LCD shows “DR ENABL or DR DISAB” press the CAL Key again and the LCD shows
“ZERO xx”. ZERO XX changes can now be made.
Pressing UP Key increases the zero position of the valve away from the hard stop.
Pressing DOWN Key moves the zero position closer to the hard stop.
4.4.4 Span Position (SPAN XX) - Adjusts the electronic stop away from (increasing values)
or towards (decreasing values) from the physical open position. 0 being nominally
the position of the hard stop Span Zero and 100 about 15 degrees away from it
Pressing DOWN Key reduces the span position of the valve away from the hard stop
Pressing UP Key moves the span position closer to the hard stop.
4.4.5 Direct / Reverse Acting (DIR ACTG / REV ACTG) - Direct Acting means that the valve
opens with increasing loop current, Reverse Acting means that it closes with increasing
loop current. This function can be selected after the auto calibration is complete.
Pressing the DOWN or UP Key toggles this setting.
4.4.6 Transmitter Fault Current (TX FT LO or TX FT HI) - This specifies the Monitor Transmitter
Fault current as either LO 3.5mA or HI 21.5mA. This is always available but only effective
if the unit has a Transmitter.
The LCD shows “DIR ACTG or REV ACTG” press the SEL Key again and the LCD shows “TX
FT LO or TX FT HI”. TX FT LO or TX FT HI can now be selected.
Pressing the DOWN or UP Key toggles this setting.