Leybold pressure gauges¶

Leybold manufactures a range of pressure gauges and controllers with several different standards and communication protocols. The code has been tested with Leybold ITR90 pressure gauge using its built-in RS232 connection.

The main device classes are pylablib.devices.Leybold.ITR90.

Software requirements¶

The devices provide a bare RS232 interface, so any appropriate USB-to-RS232 adapter should work.

Connection¶

Since the devices are identified as COM ports, they use the standard connection method, and all you need to know is their COM-port address (e.g., COM5):

>> from pylablib.devices import Leybold
>> gauge = Leybold.ITR90("COM5")
>> gauge.close()

Operation¶

ITR90¶

The operation of this gauge is fairly straightforward, but there is a couple of points to keep in mind:

Device operates by constantly streaming its status updates. To get the most recent and most consistent data, you can use ITR90.get_update(). This is also how you access the gauge status and error states.

By default, the pressure is always returned in Pa regardless of the display units. This behavior can be overridden by setting display_units=True in ITR90.get_pressure().