INFICON VGC403 Three-Channel Measurement and Control Unit - Manual (Page 15)

tinb07e1-e 2011-07 Vacuum Gauge Controller
15
4 Operation
4.1 Front panel
Fig. 4-1,  15 shows the front panel of the VGC403. The
VGC402 is not equipped with the switching points SP5
and SP6 (Pos. A) and the display for the channel 3 (Pos.
F).
Fig. 4-1 Front panel of the VGC403
A Switching function indicator
B Parameter mode
C Pressure unit
D Display area for channel 1
E Display area for channel 2
F Display area for channel 3
G Control buttons
4.1.1 Display
Switching functions
The top left corner (Pos. A) of the display indicates the
switching function states. An illuminated triangle above a
number indicates that the pressure is above the lower
threshold value. An illuminated triangle below a number
indicates that the pressure is below the upper threshold
value. See Fig. 5-1,  21.
Parameter mode
The PARA indicator (Pos. B) is illuminated when the unit
is set to the parameter mode.
Pressure unit
The top right corner (Pos. C) of the display indicates the
pressure unit: mbar, Torr, Pa, or Micron.
Channels
There is a separate display area for each of the available
channels (Pos. D, E, F). From the left to the right, this
area displays the following information:
4.1.2 Control buttons
CH
The CH button is used to select a channel. This may be
necessary e.g. if you want to switch a particular sensor on
or off, or if you want to modify the sensor parameters. The
number of the currently selected channel is flashing for a
few seconds.
PARA
The PARA button is used to select the parameter mode.
The PARA indicator (Pos. B) is illuminated and you can
modify various parameters. See Chapter 4.5 Parameter
mode,  19.
Arrow buttons (DOWN/UP)
The arrow buttons are required for entering data in the
parameter mode. Pressing one of these buttons will
decrease or increase the currently displayed value. In the
following, these buttons will be referred to as DOWN and
UP, respectively.
para ch
A B C
D
E
F
G
Display Significance
1, 2, 3 Channel number
FAIL (flashing) Error
DEG (illuminated) Degas function is acti-
vated
HV (illuminated) High-vacuum circuit is
activated
-8.8.8.8.8
+18 Measurement or status
message
OFS (illuminated) Offset correction is acti-
vated
COR (illuminated) Gas type correction is
activated