TSI Instruments 3772 - Analog out; Auto Fill; Totalizer Time (3772 Only)

Instrument Operation 4-7
Totalizer Time (3772 only)
The Totalizer Time feature is available from the User Settings submenu.
Use this feature with the Total Count Mode function to select the time
period for accumulating counts. Three options are available: 1 minute,
60 minutes, and Continuous. The default setting is “Continuous.” Pressing
the left or right arrow will cycle through these three options. Time
and count accumulation stops once the time is complete. The accumulation
can also be ended manually prior to the end of a sampling period from the
Total Count Mode display.
Auto Fill
When the Auto-Fill option is ON, the instrument fills with butanol
automatically when the liquid level indicator in the butanol reservoir detects
a low butanol level condition. Selecting Auto-Fill OFF prevents the fill valve
from opening despite a low butanol level. Note that a Drain command will
turn Auto-Fill to OFF. Auto-Fill can be turned back on by using the Auto-
Fill setting or by restarting the CPC.
On the 3772, an Auto Fill option is available in the User Setting submenu.
Pressing the left or right arrow will toggle Auto-Fill ON or OFF. On
both 3771 and 3772, Auto-Fill can be set ON or OFF with the “SFILL”
firmware command. See Chapter 7 and Appendix B for more information
on firmware commands.
Analog Out
The Analog Out setting configures the signal from the “DMA/Analog
Output” port on the back panel. This analog signal is from 0 to 10 V. There
are five options available to select: OFF, 1E+1, 1E+2, 1E+3, 1E+4. The
analog signal is linearly proportional to particle concentration when it is
turned on. The relationship between voltage output and particle
concentration is listed below.
Option
Concentration Range for Analog Output 0–10 V
Relation
OFF
0 V independent of concentration
-
1E+1
0 to 10 particles/cm
3
linear
1E+2
0 to 100 particles/cm
3
linear
1E+3
0 to 1,000 particles/cm
3
linear
1E+4
0 to 10,000 particles/cm
3
linear
OFF
0 V independent of concentration
-
On the 3772, the Analog Out option is available in the User Settings
submenu. Pressing the left or right arrow will cycle through the
options. The scaling and OFF options are available to the 3771 and 3772
through the “SAO” firmware command. See Chapter 7 and Appendix B for
more information on firmware commands.