REV. 1 MC
13616 Hempstead Road · Houston, Texas 77040 · (713) 460-5200 · (800) 460-5200
Page 5 of 8
section. Once inside a menu level the keys perform the following functions.
SET Saves current value and moves to next item on menu.
? Selects digit to change.
? Moves digit up.
? Moves digit down.
If you press the A/M (auto/manual) key the unit automatically returns to Level 1. If no keys are pressed for 1
minute, the unit automatically returns to Level 1.
Level 1 Parameters
The unit is automatically in level 1. Pressing the SET key cycles through the parameters in the following
order.
SV This is the setpoint value in degrees.
OUtL Output Percentage (only displays and is accessible in manual mode).
At AutoTuning Status
AL 1 Alarm 1 setpoint
AL 2 Alarm 2 setpoint (if installed)
AL 3 Alarm 3 setpoint (if installed)
Level 2 Parameters
To access the Level 2 parameters, hold the SET key for 5 seconds. Pressing the SET key cycles through
the parameters in the order shown below. To return to Level 1 hold the SET key for 5 seconds or the unit will
return automatically if no keys are pressed for 1 minute. There should be no reason to adjust these
parameters unless the unit fails to stabilize in the auto-tuning mode.
P 1 Proportional Band setting. Input range 0-200%. Set at 0% for on/off control. Use the
proportional band to adjust the gain (response speed of the system). Ideally, the band should be
slightly wider than the natural oscillations of the system. The band should be set at 1 and
gradually increased until oscillation stops. Equilibrium will be reached, but not necessarily at the
setpoint.
. I Integral Time. Range: 0-3600 sec. Set at 0 for Integral off. After setting up the proportional
band, set the integral time at a high value and continue to decrease until the system just starts to
oscillate and then back off.
d 1 Derivative Time. Range: 0-900 sec. Set at 0 for Derivative off. The purpose of adjusting the
derivative time is to reduce or eliminate overshoot. Set the derivative at a small value then
increase the set point. If the temperature overshoots, increase the derivative time in small
increments until overshoot is reduced. If the system becomes too sluggish, decrease the
derivative time.
db 1 Dead-band time compensation. Range 0-1000 sec.
AtUL Auto tuning offset. Range 0-USPL. Used to hold process at a offset value from the actual
setpoint value.
Cyt 1 Proportional cycle. Range 0-150 sec. When using SSR output, set to 1, 4-20mA Set to 0,
When using relay output, it is normally set at 10.
HyS 1 Hysteresis. Range 0-1000. Only used for on/off control. This is the amount of “swing” from the
setpoint before the heater turns on or off.
P 2 Proportional Band setting for second output. Input range 0-200%. Set at 0% for on/off control.
Use the proportional band to adjust the gain (response speed of the system). Ideally, the band
should be slightly wider than the natural oscillations of the system. The band should be set at 1
and gradually increased until oscillation stops. Equilibrium will be reached, but not necessarily
(42 paginas)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentarios a estos manuales