January 2006
4-10 Programming the VGA Optica
Automatic Cleaning and
Balance Function (cont.)
3. Manually clean the mirror as required.
Note: Manual cleaning provides the most thorough cleaning.
4. After manual cleaning, initiate the Automatic Cleaning &
Balancing.
5. To program a specific time of day at which to initiate the
Automatic Cleaning and Balancing:
a. Highlight either Auto-D or Pacer-D.
b. In the Enter Time dialog box, input the time of day that you
would like to initiate the balance cycle in a 24-hour format (for
example, 13:30 would be 1:30 PM).
Note: In this mode the front panel Pacer initiation function is
disabled. Powering down and restarting the unit will have no
effect on the time programmed, however the PACER will run
on startup as is the normal function.
6. To program an elapsed time to initialize the Automatic Cleaning
and Balancing:
a. Highlight either Auto or Pacer.
b. In Interval dialog box, input the elapsed time in minutes (for
example, 720 would enable the balance cycle to run every 12
hours).
Note: If the unit is powered down and restarted, or the Automatic
Balance is initiated from the font or by using a LAN, the
elapsed time will reset.
Note: Show Status should read “Enabled”.
7. Select either Track or Hold for the analog outputs
(4-20mA/0-5VDC).
Note: If Track is selected, the actual temperature of the mirror will
be transmitted. If Hold is selected, the last prevailing dew
point, measured before the balance cycle was initiated, will be
transmitted during the time that the balance cycle is running.
IMPORTANT: For environments or a gas sample where the mirror
accumulates contamination rapidly, the use of an
inline filter is recommended. Lower flow rates will
also reduce the accumulation of contaminants.
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