LEYBOLD THERMOVAC TTR 91 R, Руководство по эксплуатации

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17 300710168_002_C1 - 01/2018 - © Leybold
Vacuum adjustment
1. Reduce the system pressure to 1 x 10
-4
mbar (or below).
2. Allow the gauge to operate for at least 10 minutes.
3. Momentarily press the 'CAL' button.
Do not hold the ‘CAL’ button down for longer than 5 seconds (this would
start the ‘Adjustment for new tube’, as described below). The status LED will turn amber and the gauge will
automatically adjust to read vacuum.
Remote adjustment
The atmosphere and vacuum adjustments can be performed remotely using a switch connected as shown in the
Figure in section 4.1. Follow the procedure described above, but momentarily close the remote switch instead of
using the ‘CAL’ button on the gauge.
Adjustment for new tube
If a replacement tube is fitted to the gauge it will be necessary to adjust the gauge to match the new tube. Note that
this is not required unless a new tube is fitted, and it is always necessary to perform a vacuum adjustment afterwards.
1. Switch on the power supply to the TTR 91 R.
2. With the gauge at atmospheric pressure, press the 'CAL' button and hold it down for longer than 5 seconds.
The status LED will begin to flash red / green alternately and the gauge will automatically adjust to match
the new tube. This may take several seconds.
3. Allow the gauge to operate at atmospheric pressure for at least 10 minutes and then repeat step 2.
4. It is now necessary to perform the vacuum adjustment as described above.
.