Product Float and Water Float Offsets
The 924B probes differ slightly in setup from previous models of probe. This section tells you how to match
your manual dipstick tank readings to the readings from the probe. Offset compensates for the angle (or slope)
that the tank may have.
When performing subtractions, remember that subtracting a negative number is the same as adding the
positive version of that number. For example, subtracting -2 from 6 results in 8.
1.16 Offset Procedure
An example appears below.
1. Run the SiteConnect software. Set both the Product Float Offset and the Water Float Offset held in
the SiteSentinel iTouch Controller to zero (0).
2. Using your normal dipstick access point in the tank, take a Dipstick Product Level and a Dipstick
Water Level. To take the Dipstick Water Level, use water detect paste on the bottom of the dipstick.
3. Take an inventory reading from the Controller. Note the Probe Product Level and the Probe Water
Level.
4. Calculate Product Float Offset and Water Float Offset:
5. Product Float Offset = (Dipstick Product Level – Probe Product Level)
6. Water Float Offset = (Dipstick Water Level = Probe Water Level)
7. Run SiteConnect software and configure the SiteSentinel iTouch Controller with the new offset values
obtained in the previous step.
8. Take an inventory reading from the Controller. The Probe Product Level should now match the
Dipstick Product Level and the Probe Water Level should now match the Dipstick Water Level.
NOTE: A typical Product Float Offset is 7.4 cm (2.9 in) and a typical Water Float Offset is 0 cm.
8.1.1 Float Offset Example
Sample DIPSTICK Levels
• Product = 59.5
• Water = 1.2
Sample PROBE Levels
• Product = 56.6
• Water = 1.5
Using this data and this equation: Dipstick Product Level = Probe Product Level = Product Float Offset,
the product offset value is 59.5 – 56.6, or 2.9.
Using this data and this equation: Dipstick Water Level – Probe Water Level = Water Float Offset, the water
offset value is 1.2 – 1.5, or -0.3.
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