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Page 23
Channel Settings
The Terranova® 752A is able to operate ion pumps from various manufacturers due to the user-
adjustable current and voltage output. The current and voltage output limits are respectively
set via the MAX CURRENT and MAX VOLTAGE parameter. Moreover, the control unit is also able
to output the approximate ion pump pressure via the use of the PUMP SIZE parameter and
selected pressure unit. See
on page 29 for details on how pressure
is calculated. A set point (and corresponding relay) is available per channel to control external
devices. The set point function is by default disabled (i.e. OFF) and is enabled and its value set
via the respective SET POINT parameter. See
on page 31 for details
regarding the set point function.
Channel Parameters
To view or change the channel parameters via the front panel, the user must press the SELECT button
of the respective channel to enter its setup mode.
lists the default channel parameters;
lists the value range for all channel parameters except the set point parameter. To view
or modify ion pump parameters remotely, see
Parameter
Value
Set point value / function
Disabled (OFF)
Max. voltage
7.5 kV
Max. current
10 mA
Pump size
20 l/s
Pressure unit
Torr
Parameter
Range
MC
1.0 - 50.0 mA
MV
3500 - 7500 V
PS
0.1 - 999.0 l/s
Pressure Unit
torr; mbar; Pascal
Table 4.
Channel default values
Table 5.
Channel parameter ranges