Technical Data                                                                        IONIVAC Transmitter

                                                                                                       ITR 90

       Display range                         mbar (Torr)                               5 x 10-10 to 1000 (3.75 x 10-10 to 750)

       Measurement uncertainty, 10-8 - 10-2 mbar                                                15% of the meas. value

       Reproducibility, 10-8 - 10-2 mbar                                                        5% of the meas. value

       Principles of measurement                                                 Hot cathode ionization according to Bayard-Alpert

                                                                               combined with thermal conductivity according to Pirani

       Degas                                                                           Electron bombardment 3 minutes, max.

      Supply voltage                                                                        20 to 28   V DC, typ. 24   V DC

       Power consumption, max.                         W                                                   16

      Storage / nominal temperature range              °C                                        -20 to +70 / 0 to +50

       Protection class                                                                                   IP 30

      Weight, approx.

          ITR 90, DN 25 KF                       kg (lbs)                                             0.285 (0.64)
          ITR 90, DN 40 CF                       kg (lbs)                                             0.550 (1.24)

      Sensor                                                                                  Fully sealed, exchangeable

       Bake out temperature, max.                      °C                                                150 1)

       Dead volume, max.                             cm3                                            24 at DN 25 KF

                                                                                                    34 at DN 40 CF

       Materials in contact with the medium                           Cu, W, Glas, NiFe, Mo, stainless steel, Aluminum, Iridium, Yttrium, NiCr,

       Over-pressure rating (abs.)                    bar                                                   2

      Signal output (Ra     ≥10 kΩ)

          Measurement signal                                                          0 - 10 V, 0.774 - 10 V, 0.75 V pro decade

          Error signal                                                                                  < 0,5 V

       Interface (standard / optional)                                                           RS 232 C / ProfiBus

       Electrical connection                                                        15 way Sub-D male connector / pin contacts

       Cable length, max.                              m                                         100 / 30 at RS 232 C