INFICON STM-2XM 2-Channel Rate/Thickness Monitor - Manual (Page 128)

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STM-2XM Operating Manual
6.5 Diagnostics Menu
STM-2XM has a diagnostics menu that is helpful in identifying problems. Some of
the useful things on this menu are:
 Raw frequency of the sensor(s)
 State of the remote digital inputs
 State of the relay outputs
Also, for testing the system, the parameters for relay output allow any relay to be
opened and closed to check that the system responds appropriately.