INSTRUMENT MANUAL
VACUUM GAUGE MODEL MM200
160Phone:(215) 947-2500 fax:(215) 947-7464 e-mail:sales@televac.com web site:www.televac.com
MM-200_im REV M
Page 113 of 160
TELEVAC
"SV<cr>"
4. Fetch the modular unit software version. The modular unit responds with "Ver
n.nn<cr>", where n.nn is the version number.
DATA OUTPUT
"Annn<cr>"
1. Automatically output periodic readings from any selected number of the sensors.
Where "nnn" is any number from 001 to 255. Note that three digits must be sent
including lead zeros. All marked stations (see below) shall have their readings
output at the end of "nnn" loops of measuring all the station
between outputs is approximately (0.11)(nnn)(N). Where N = the number of
stations that are installed in the modular unit, no matter how many stations are
having their data outputted. This feature is not available in the "B" mode.
The data output is in the same format as for the "Rx<cr>" command below, except
that for a given set of outputs, the marked station outputs are preceded by a blank
space. The last (marked) station value output is followed by a carriage return.
For example if eight stations are installed, stations 1, 4, and 7 are marked, and the
command "A010<cr>" is sent. Approximately every 8.8 seconds the modular unit
would output something like:
" 1=1.23+3U 4=4.50+1U 7=1.10-5T<cr>"
"CA<cr>"
2. Cancel automatic output of data. This command causes the automatic output of
data to cease. It does not "unmark" stations, they stay marked, and if the
"Annn<cr>" command is again given, the output of data from those stations that
were marked will resume. The response to this command is "A<cr>".
"Mx<cr>"
3. Mark the stations from which the above automatic readings shall be received.
Where x is the number of the station to be "marked" for automatic output (one
station at a time). The response to this command is "A<cr>".
"Rx<cr>"
4. Obtain individual vacuum readings from the various sensors. Where x is the
station from which a reading is desired. This command cannot be used when in
the "B" mode.
The response to this command is in the same format for all types of sensors. That
is, the response is in exponential form. The form is "n=x.xx(+ or -)yu", where "n" is
the station number, "x.xx" is the value given to two decimal places, followed by
either a plus or a minus, followed by the exponent (power of ten), followed by
either a "U" for microns or a "T" for Torr. For example, a Model 2A thermocouple
at station #2 might respond "2=2.45+2U", corresponding to a pressure reading of
245 microns. This command should not be used at the same time that the
"Annn<cr>" command is being used, and none of the stations should be marked
for automatic output when this command is used.
