Robo-Tank DIY All-In-One Aquarium Controller User Manual
Robo-Tank DIY All-In-One Aquarium Controller
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User Manual v4.05 – Page 54
In this case, calibrating with a solution is slightly different from the other probes, in that you insert the probe directly into
the solution bottle, ensure it is clean and dry, before you do. Swirl it around to eliminate any trapped air, leave it in the
solution for 1:30 minutes to stabilize, and then press OK.
Important
- Calibrating a DO probe using a 0mg/L Calibration Solution
As this is a 0mg/L Oxygen solution, and Oxygen is all around us, and the solution has been designed to chemically absorb
oxygen, once it is opened, the test solution has been exposed to oxygen and will slowly stop working.
Inside each bottle of calibration solution is a small amount of nitrogen gas that helps to displace oxygen out of the bottle
during the filling process. When the DO probe is removed from the bottle. Oxygen will enter the bottle and begin to
dissolve into the solution.
In order to slow down this process, fill the void space of the bottle with any gas, (other than oxygen) to preserve the
calibration solution. For safety reasons avoid flammable gases, if at all possible. If another suitable gas is unobtainable, you
can use the gas from a portable lighter. See the image below:
Ɨ Image courtesy of Atlas-Scientific
**CAUTION: This is flammable/explosive gas, do this with the utmost care, and REMEMBER – NO FLAME, JUST GAS!
