Operation
Designation
ILMVAC-Control
Control
panel
Explanation
cv-control valve
ccv-chopper control valve
pressure regulation
Not
settable
Enables the selection of the control algorithm for controllers with a
control valve. In the case of the cv, the valve is simply closed when the
setpoint is reached. In the case of the ccv, the control valve is briefly
opened and closed several times shortly before the setpoint is reached.
ccv prevents the setpoint being passed under certain circumstances.
However, both algorithms usually work well.
1 - manual
(Manual pressure setting for boiling pressure
see Solvent table, chapter 6.5
)
2 - manual, pressure drop
(Manual pressure setting with additional pressure drop)
5 - automatic
(automatic finding of the boiling pressure)
6 - automatic, pressure drop
(automatic finding of the boiling pressure with additional pressure
drop)
mode
Can be set
with display
P
, if the
control is
inactive
There is only the modes meaningful for their Controller adjustable.
(see operating modes of the controller, chapter 6.2)
mbar, Torr, psi
pressure unit
indication
only
via LEDs
The unit of pressure can only be set via "ILMVAC-Control".
ON - automatic venting after STOP is on
air valve at STOP
Not
settable
OFF - automatic venting after STOP is off
set Clock(PC)
Not
settable
The time on the controller is set according to the PC time.
setpoint
PS
Enter a setpoint pressure value between 0 and 1100 mbar.
0 sec cooling water valve remains open after STOP.
1 ... 14400 sec Cooling water valve is closed with a delay after STOP.
follow-up time
cooling unit
tH
The display is in secs in the "ILMVAC-Control" and in mins on the con-
trol panel.
PL
Amount of pressure drop
pressure drop
tL
Time for pressure drop
motor slow down
FA
0 ... 100%
Reduces the frequency of rotation / rotational speed to a percentage of
the maximum speed of the pump motor in order to determine the boiling
point smoothly.
search threshold
PA
Threshold value for detecting the boiling point (unit of pressure/ min)
teach factor
Not
settable
PI = teach factor * “measured value from the teach process“
max. setpoint
leakage
PI
In economic mode, the pump is switched off after reaching the setpoint.
The pump is not switched on again until the hysteresis value has been
exceeded or if the pressure rises more quickly than PI.
follow-up time motor
tn
After reaching the setpoint, the pump continues to pump for a further tn
seconds. The display is in secs in the "ILMVAC-Control" and in mins on
the control panel.
pressure alarm time
Not
settable
A signal is given if the pressure is not reached within the set time. (Sig-
nal output is not fed out on the casing.)
read
-
Read out current parameter values from the controller and display in the
Settings dialog.
send
-
Values changed in the Settings dialog are stored in the controller. The
controller confirms reception with a signal tone.
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