
MG14 operating manual Rev 1.4
30
4.2.4.1 Sensor menu -
Sensor
Sensor menu allows to chose type of IONI transmitter and its parameters on channel 1. Channel 2 is
associated with any OERLIKON/LEYBOLD transmitter with analogue output. Gauge TTR 91 is a
default one on chanell2:
Fig 4-12 Sensor menu
There is possible to choose one of 3 onivac sensors:
-
Ie 514 gauge (EXTRACTOR OERLIKON/LEYBOLD)
-
Ie 414 gauge ( B-A OERLIKON/LEYBOLD )
-
Bayard-Alpert gauge - universal
NOTE:
Emission current of Ie514 and Ie414 is limited according to the manufacturer specyfication
4.2.4.2 Gauge parameters
There is an individual set of Bayard-Albert ionization sensor. Such a possibilities makes MG14
flexible unit and can be customized to most Bayard-Alpert existing on the market.
Using the narrow buttons
▲or▼ and MENU/ENTER button you can move between the parameters
and set the values.
4.2.4.3 Emission current menu
–
EMIS.CURR
The following emission current for B-A gauge can be choose:
-
0.1
….. 1,99 mA ( adjustable )
-
2mA
-
4 mA
-
10 mA
Those currents are typical for most available B-A gauges, and should be set correctly to the gauge
manufacturer specification. How ever each of those parameters can be choose for any B-A gauge.
Pressure measurement is calculated to the following rule:
P = I
c
/ (S
g
x I
e
)
where:
P
– pressure
I
c
– Ion current
S
g
– sensitivity factor for gas g
I
e
– emission current