9
Figure 3-3. 3rd System Analyzer Display
Vacuum Mode
Note: If you are using a new vacuum sensor for
the first time, the vacuum sensor calibration num-
ber must be entered. The instrument will report
incorrect data if this is not done. Go to ‘Vacuum
Sensor Calibration Utility’ further down in this
chapter for instructions.
The instrument can simultaneously use display
inputs from two sources:
Vacuum Sensor
Internal Pressure Transducers
Note: Although the internal pressure transducers
are primarily used for positive pressures, they also
give a helpful indication of vacuum activity before
the vacuum sensor indicates values in the ranges
that are typical when operating vacuum pumps.
This screen can be accessed from the main menu,
“Vacuum Gauge” selection, or the “Digital Manifold”
screen by simply plugging in a vacuum sensor if
the “Auto micron meter” is set to “ON”. (See “Set-
tings - Auto Vacuum Gauge” in the Setup menu.)
●
●
Figure 3-4. Vacuum Gauge Display
1 Pressure units. While using any of the
digital manifold or vacuum gauge display
screens, press the UP/LEFT key to activate
a pop-up screen where options can be
changed using the UP/LEFT and DOWN/
RIGHT keys. Press the MENU key to save
the selections and exit the pop-up screen.
2 Discharge pressure (‘High Side’).
3 When data recording is activated, this
indicator will gradually change from red
to blue indicating the size of one page of
data. During playback, it will help the user
to decide whether to move through the
data slowly or page-by-page. Adjusting the
sampling rate will affect the amount of data
on each page.
4 Vacuum reading. The message “Out of
range” will appear until the vacuum reaches
25,000 microns.
5 Elapsed time display. Press “Clear” to reset
counter to 0:00:00.
6 Vacuum Units. Vacuum readings can be
displayed in Microns, mTorr, Torr, mmHg,
mBar, KPa, and Pa.
If it is desirable to match the pressure units
with the vacuum units, the pressure units
must be selected before proceeding with
vacuum procedure.
While using any of the digital manifold or
vacuum gauge display screens, press the
UP/LEFT key to activate a pop-up screen
where options can be changed using the
UP/LEFT and DOWN/RIGHT keys. Press
the MENU key to save the selections and
exit the pop-up screen.
7 When recording is activated, the sampling
rate is displayed here. See “Chapter 4 –
Data Logging” to set the sampling rate.
8 The minimum and maximum pressures
encountered since the memory was last
cleared (“Clear” key). (Typical for high and
low sides.)
9 Left Side: Suction pressure (‘Low Side’).
Press the UP/LEFT key to activate a pop-
up screen where options can be changed
using the UP/LEFT and DOWN/RIGHT
keys. Press the MENU key to save the
selections and exit the pop-up screen.
