Technical Data                                                                THERMOVAC Transmitter

                                                                                TTR 100 / TTR 100 S2

Measurement principle                                  Thermal conductance according to Pirani combined with capacitance diaphragm

Measurement range
(air, O  , CO, N )                   mbar (Torr)                              5 x 10-4 to 1500 (3.8 x 10-4 to 1125)
      2        2

Accuracy
   1 x 10-3 to 50 mbar                                                                  ± 15% of reading

   50 to 950 mbar                                                                       ± 5% of reading
   ATM (atmospheric pressure)                                                          ± 2.5% of reading

Repeatability                                                                           ± 2% of reading

Trigger (only TTR 100 S2)                                                                       2
   Setting range with potentiometer                                                 1.5 x 10-3 to 1400 mbar

    Relay contacts                                                                     N.O. / potential free
       closed                                                                       at low pressure (lamp lit)
       open                                                                  at high pressure or no supply (lamp off)
    Hysteresis                                                                          10% of threshold
   Contact rating                                                                        30  V DC / 1 A
    Relay status                                                                       active: LED, green

Output signal analog                                                                       0 to 10.3 V
    Measurement range                                                                   +1.9 to +10.23 V
   Voltage vs. pressure                                                           1.286 V / decade, logarithmic

Output impedance                                                                2 x 4.7 Ohm, short circuit-proof
    Minimum load impedance                                                                  10 kOhm
    Response time                                                                             10 ms

Power supply
   Voltage (ripple  1 Vpp)                                                             +15 to +30   V DC
   Consumption, max.                                                                          2.5 W
    Fuse to be connected                                                                1 AT (time delay)

Electrical connection                                                              FCC-68, 8 way with shield

Cable length, max.                              m                                              100

Materials exposed to vacuum
(process media)
   Vacuum connection                                                                      stainless steel
    Pirani filament                                                                         tungsten
   Capacitance sensor cell                                                                    AI2O3
    Feedthrough                                                                               glass
   Other materials                                                                  Ni, Cu, NiFe, SnAg, AgPd

Internal volume
    DN 16 ISO-KF                            cm3                                                 6
   1/8" NPT                                 cm3                                                 8

Over-pressure rating, abs.                   bar                                                5

Temperature
   Operation (ambient)                        °C                                           +10 to +50
   Storage                                    °C                                           -20 to +65
    Bakeout at flange, max.                   °C                                               +80
    Filament temperature                      °C                                              < 160

Relative humidity                                                              < 80% at temperatures < +31 °C,
                                                                                  decreasing to 50% at +40 °C

Mounting orientation any                                                                       any

Use                                                                         Indoors only, altitudes up to 2000 m NN

Protection class                              IP                                               40

Weight
    DN 16 ISO-KF                         kg (lbs)                                          0.09 (0.20)
   1/8" NPT                              kg (lbs)                                          0.09 (0.20)

Oerlikon Leybold Vacuum Full Line Catalog                                                                                                   31   C16