
MULTI GAUGE CONTROLLER
OPERATION
. .
GAUGE CONFIGURATION - SENSOR MENU
Gauge selection menu. Select a gauge type compatible with the gauge type physically connected
with the device. The following types of passive gauges are available:
IE
, IE
, UHV- , UHV-
p, MKS Series
, NUDE-UHV- A, NR-F-UHV, G
, De ined
and active:
CTR , TTR ,
TTR
, PTR
, PKR
, PCR
, PTR , ITR , ITR
, Baratron, Analogue input, PG
,
ATMION, De ined
. Gauges CTR / and Baratron require additionally to specify the FS parame-
ter (Full Scale) compatible with the connected gauge. The parameter de ines the measuring range
of the connected gauge. For CTR /
gauges the FS parameter is expressed in Torr. For Bara-
tron gauges the FS parameter is expressed in Torr and PSI. The PG
gauge requires an initial
calibration procedure, which is necessary for the correct vacuum display. This is a two-point cal-
ibration: at atmospheric pressure and medium vacuum. Connection of the PG
gauge requires
an additional ampli ier (PGA ).
. . .
SETUP OF ACTIVE GAUGES
To obtain correct indications of vacuum choose a gauge compatible with the physically connected
one. For that purpose click on
Setup menu →Sensor →IG or IG or IG →Gauge: current gauge
The user can select one of the standard gauges or a gauge named as
De ined
, which enables spec-
ifying all the parameters of a gauge, thus allowing any gauge to be connected . . . . Also after
selecting a gauge from the list of standard gauges, the user may de ine its basic parameters . . . .
The following parameters of passive gauges are permanently monitored during operation:
• anode voltage
• ilament voltage (Ubias)
• emission current
• ilament current
• re lector voltage
. . .
PARAMETERS OF PASSIVE GAUGES
.
EMISSION CURRENT
The user may set an emission current between . mA - mA:
Pressure is calculated according to the following formula:
=
⋅
where:
- pressure
�
- ion current, see ig. .
�
- sensitivity factor for a given gas
g
�
- emission current, see ig. .
For most gauges the emission current
�
must be kept at a low level for high pressures, and
for low pressure it should be accordingly increased.
User manual rev.
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