PDES-01DM User Manual
version 1.3
page 10
(12)
Operation mode switch
Switch for setting the operation mode
TIMER:
The internal timer is used. The timer can be started via a TTL HIGH signal at #
11
or by pushing a pushbutton connected to #
10
CONT.:
The valve is open
EXTERN: The valve is open as long as the input signal at #
11
is HIGH or the pushbutton is
pressed.
OFF:
The PDES module is turned OFF, the valve is closed. LED (#
15
) is also off. The
source pressure value is still shown at the manometer #
1
, but opening of the valve
is disabled in OFF position.
(see also chapter 4.2)
(13)
x10s/ x1s / x0.01s / x0.01s switch
Switch to set the time base of the timer #
14
; range: x10 s, x1 s, x0.1 s or x0.01 s. The total
ejection time is the reading of this switch multiplied by the reading of the timer
potentiometer (#
14
).
(14)
TIMER potentiometer
Potentiometer to set the ejection time. The total ejection time is the reading of this potentiometer
multiplied by the reading of the time base switch (#
13
).
Note
: Due to tolerances of resistors and capacitors the time preset with the analog timer may
vary up to 20%!
(15)
ON / EJECT LED
Indicates the operational status of the ejection channel.
red light:
valve is closed, i.e. OUT connector is closed and EXHAUST connector is open.
green light:
valve is open, i.e. OUT connector is open and EXHAUST connector is closed.
Off (no light) valve is closed