General Information
2
GA09313_0202 – (2008-02) –
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Oerlikon Leybold Vacuum
Product Identification
In all communications with Oerlikon Leybold Vacuum, please specify the infor-
mation given on the product nameplate. For convenient reference copy that in-
formation into the space provided below:
Oerlikon Leybold Vacuum, D-50968 Köln
Type:
No:
F-No:
V
W
Validity
This document applies to products with catalog numbers:
230 070
(DN 25 ISO-KF
)
230 071
(DN 40 ISO-KF
)
230 072
(DN 40 CF-F
)
The catalog number (No) can be taken from the product nameplate.
If not indicated otherwise in the legends, the illustrations in this document corres-
pond to transmitters with the vacuum connection DN 25 ISO-KF. They apply to
transmitters with other vacuum connections by analogy.
We reserve the right to make technical changes without prior notice.
All dimensions in mm.
Intended Use
The PENNINGVAC Transmitter PTR 90 has been designed for vacuum measure-
ment in the pressure range of 5×10
-9
… 1000 mbar.
The transmitter must not be used for measuring flammable or combustible gases
which react in air.
It can be operated in connection with an Oerlikon Leybold Vacuum gauge
controller CENTER ONE, CENTER TWO or CENTER THREE, or with another
controller.
Functional Principle
Over the whole measuring range, the measuring signal is output as a logarithm of
the pressure.
The transmitter consists of two separate measurement systems (Pirani and cold
cathode system) the signals of which are combined in such a way that one
measurement signal is output. The Pirani measurement circuit is always on.
