Thyracont VD10, Operating Instructions Manual

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vd10s8-de-131129
corr : Set gas type correction factor
For transducers whose measurement depends on the type of gas
you can enter a correction factor for compensation. This way the
pressure reading can be corrected in a range below 0.1 mbar.
Appropriate correction factors are found in the operating instructions
of the transducer or suitable technical literature. The range of the
gas type correction factor is 0.20 to 8.00.
For transducers with combination sensors separate factors for both
sensors can be entered. The associated sensor type is displayed in
superscript letters behind the numeric value of the factor, e.g. PI for
Pirani, CC for Magnetron (cold cathode) and BA for Bayard Alpert
(hot cathode).
trMode : Select transition mode
For transducers with combination sensors you can select whether a
hard switch-over ("switch") or a continuous transition ("trans") be-
tween the two sensors should be performed in the overlap range.
ion/fil : Enable/disable ionization sensor
Transducers with combination sensors operate an ionization sensor
(hot or cold cathode) for measuring pressure in the high vacuum
range.
For certain vacuum processes it may be favoured to suppress the
start of the ionization sensor, which is automatically controlled by the
transducer electronics.
"off"

ionization sensor disabled
"on"

automatic control of the ionization sensor
With disabled ionization sensor transducers VSM and VSH behave
like a Pirani transducer with range 1000 - 1x10
-4
mbar. Correspond-
ingly the output "ur" in this case means that actual pressure is below
1x10
-4
mbar.
Settings made under ion/fil are only temporarily saved in the
transducer memory. After mains supply is switched off or dis-
connected the transducer will always be in mode "ionization
sensor enabled" !