Agilent Technologies AGC-100, Руководство пользователя, Страница: 30 / 96

Vacuum Gauge Controller AGC-100
30
Value
SP1-CH
I Configuring a switching function.
SP1-CH DISABLED
I

Switching function 1 is factory-deactivated
SP1-CH ENABLED
I

Switching function 1 is always turned on
SP1-CH 1
I

Switching function 1 is assigned to
channel 1
The lower and the upper threshold of a switching function are always
assigned to the same channel. The last assignment is valid for both
thresholds.
Value
SP1-L
I The lower threshold (Setpoint low) defines the
pressure at which the switching function is
activated when the pressure is dropping.
e.g.:
SP1-L 5.00-4 I
 gauge dependent.
If another gauge type is connected, the
AGC-100 automatically adjusts the switching
threshold if required.
SPx-L min. SPx-L max.
PVG5xx
I
2×10
-3 *)
= SPx-H max.
PCG75x
I
2×10
-3 *)
IMG500
I
1×10
-9
FRG70x
I
1×10
-9
FRG720
I
1×10
-8
FRG730
I
1×10
-8
CDG500
I
F.S. / 1000
all values in mbar, GAS=nitrogen
*)
2×10
-4
mbar if RNG-EXT (Pirani range extension) is activated ( →  43)
The minimum hysteresis between the upper and lower switching
threshold amounts to at least 10% of the lower threshold (logarithmic
gauges) or 1% of the full scale value (linear gauges). The upper
threshold is if necessary automatically adjusted to a minimum
hysteresis. This prevents unstable states.
Configuring a switching
function
Limits of the lower switching
thresholds