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 52
Calibrating an ORP (Oxidation/Reduction Potential) Probe
Atlas EZO ORP circuits can only be calibrated only one way:
1 Point Calibration
An ORP probe, measures electron activity in a liquid. The ORP readings represents how strongly the electrons are
transferred to or from substances in a liquid.
For this calibration you require an ORP calibration solution. Currently you can use the following calibration solutions:
200mV
225mV (Atlas solution)
240mV
427mV
470mV
Selecting ORP, will take you to the screen to the
left, CALIBRATE ORP.
When calibrating the ORP circuit, you should first
clear the calibration data on the circuit, this is only
required if you were playing and didn’t do a proper
calibration, but doesn’t hurt to do it every time.
The ORP only has 1 point calibration, select and
continue.
After selecting 1 Point Calibration, you’ll see the
screen to the left, CALIBRATE ORP.
It confirms this is a Single Point Calibration, and the
Target ORP value. Below this are the instructions to
calibrate the circuit.
Pour enough calibration solution into a clean glass,
beaker or jar (rinse out with RO or distilled water),
to cover the end of the probe, swirl the probe about
to ensure full contact with the solution and to
dislodge any trapped air.
Follow these steps and press OK after waiting 2+
minutes. There is no limit how long it takes to complete a step, you can leave the probe in the solution for 20 minutes and
press OK, just be sure to leave it in the buffer solution for more than 2 minutes.
Calibration is complete once you press OK and you see a screen verifying this.
*Remember: always rinse your glass container with RO or distilled water before adding the solution, and only pour
out enough to just cover the probe tip, and swirl the probe around to ensure full contact with the solution and to
get rid of any trapped air.
