American Magnetics 135 & 136 Liquid Helium Level Instruments (CE-Marked) - Manual (Page 36)

24 Rev. 3
Remote Interface Reference
Serial Command Set Reference
4.1.4 Serial Command Set Reference
All commands sent to the Model 135/136 are processed and the Model 135/
136 responds with the answer. If the command is invalid, the Model 135/
136 will respond with -8. All return values are terminated with <CR><LF>
(i.e. a carriage return followed by a linefeed). For those commands that do
not return a value, the Model 135/136 will return the <CR><LF>
termination only.
4.1.4.1 Commands for controlling the units of measurement
The CM command sets the units of measurement to centimeters and the
INCH command selects inches. The PERCENT command sets the units of
measurement to the percentage of active sensor length that is immersed in
liquid helium. The units of measurement selected through the serial
interface are controlled independently from the units mode toggle
switch used for controlling the front panel display. The remote units
setting is saved in permanent memory by the SAVE command and is
restored at power-up. The UNIT command returns a one character value
(and termination) indicating the current units—C for centimeters, I for
inches, or % for percentage.
Command: CM Function: Sets the units of
measurement to
centimeters
Returns: <CR> <LF>
Command: INCH Function: Sets the units of
measurement to
inches
Returns: <CR> <LF>
Command: PERCENT Function: Sets the units of
measurement to % of
sensor length
Returns: <CR> <LF>
Command: UNIT Function: Returns the current
units in use
Returns: C, I, or %
<CR> <LF>