In-Situ Aquaculture Buoy Manual (purchased before 28 May 2013) - Manual (Page 23)

Host PC 23
5.6.2 Set Aerators
The Set Aerators window controls the set points for turning the
aerators on and off.
1. On the Main menu of the Pond Status screen, select Set Aerators.
2. Select the pond that needs the aerators set.
FIGURE 17. Setting the aerator on/off limits
3. There are two aerators indicated, Inside and Outside. Click one of
these options.
4. The current On and Off limits will appear in the text boxes at the
right. Use the spinners to change the levels and click OK to save
them.
5. Repeat for the other aerator. The aerator will turn on if the oxygen
level is below the “on” level. The aerator will turn off if the oxygen
reading is above the “off” level.
Additional notes:
• The host computer prevents the system from turning off an aerator
between 10PM and 6AM.
• The starting and ending times and the differential can be configured
by the user by modifying the CatHostDir.txt file in the application
folder.
Adjusting the aerator on/off set points by a user-selected incre-
ment. In addition to the on/off levels set above, you can also adjust
these levels at certain times of the day. This feature allows for a
downward adjustment of the on/off levels by a user-selected
differential. This feature is normally used to turn off aerators earlier,
but after sunrise when the oxygen levels are starting to increase. For
example, the user may use an adjustment differential of 1 point to
start at 8 am and end at 4 pm. If the normal “off” level is 6 mg/L, after
8 am, the “off” level is automatically reduced by 1 point to 5 mg/L. If
the oxygen reading is greater than 5 mg/L, the aerator will turn off. This
adjustment resulting in greater energy savings. Additionally, the “on”
level is also adjusted downward by the same amount so the oxygen
level will have to drop to a lower level before it turns the aerator on.