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 116 of 160
"GNxxx<cr>" 6. Turn the de-gas on for a specified period of time. This will turn on the de-gas for
"xxx" minutes, where "xxx" is anywhere from 001 to 255. Three digits must be sent
including lead zeros, if any. The front panel will flash the de-gas time the same as
if it were set from the front panel, except that while the de-gas time is over 99
minutes; the display will flash "dG--".
"SWx<cr>" 7. Logically set the rear panel 3D filament selector switch. This makes the modular
unit respond as if the rear panel switch were set to "x". (The switch physically
remains as it was).
LEAK RATE
"ED<cr>" 1. End Leak Rate data output. This command halts the output of leak rate data to
the comm. interface, but does not stop the leak rate test. It can be used when it is
desired to momentarily interrupt the data flow, without interrupting the test itself, so
that other commands could be exercised. The front panel continues to display the
leak rate test results (updated once each second). The response to this command
is "A<cr>".
"EL<cr>" 2. End the leak rate test. This command causes the leak rate test to cease, the
same, as the front panel push button would do if pressed while the leak rate test is
in progress. The response to this command is "A<cr>".
"LR<cr>" 3. Initiate Leak Rate testing. The results are the same as pressing the front panel
"leak rate" push button. Whenever this command is issued the leak rate test starts
at time "zero". This command can be used for resetting the test time to "zero", if
the test is already in progress. The front panel responds the same as if the front
panel push button had been pressed, that is, the right hand display shows the leak
rate values. It differs in that if the unit is in the leak rate test, pressing the front
panel push button will end the leak rate test. The response to this command is
"A<cr>". Leak rate tests always use station #1 as the sensor.
"RL<cr>" 4. Periodically obtain Leak Rate readings. This command causes the modular unit
to periodically output the leak rate reading. The data is in the form of four digits,
which include any lead zeros, followed by a carriage return such as "0015<cr>".
The four digits give the leak rate in microns per hour (the same as displayed on the
front panel). The data is outputted once every second (regardless of the setup of
the modular unit). The initial response to this command is "A<cr>". None of the
leak rate functions above are available when in the "B" mode. If any are in effect
when entering the "B" mode, they are canceled. However, the front panel leak rate
function is available during operation in the "B" mode.
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