American Magnetics 135 & 136 Liquid Helium Level Instruments (CE-Marked) - Manual (Page 52)

40 Rev. 3
Virtual Instrument Operation
RS-232 Virtual Instrument
front panel of the actual instrument to the mode desired by the operator.
The VI’s representation of the sampling mode toggle switch overrides any
actual front panel setting by forcing the actual instrument to perform an
immediate measurement when placed in the UPDATE position.
5.1.1 Launching and initializing the RS-232 VI
First, make sure the Model 135/136 is connected to a COM port on the host
computer and that the instrument is powered on. The VI library, provided
in the file MODEL13X.LLB, for the RS-232 virtual instrument contains
the following files:
VI Function
13X Alarms.vi Manages alarm functions for 135/136.
Config 13X via Serial Port.vi Initializes actual instrument from VI
configuration.
Convert from CM.vi Displays inches or percentage given input in
cm.
Counter.vi Timer function for the virtual display.
Get 13X Level via Serial
Port.vi
Updates virtual display with current level.
Init from 13X via Serial Port.vi Initializes VI configuration from actual
instrument.
Model 13X via Serial Port.vi The main VI containing the configuration and
front panel controls. This is the VI the user
should open and execute.