This screen brings together everything about the probe: the current reading, the health index, the installation date and two-point calibration. You reach it through Configuration → pH Probe.
The pH Probe screen holds reading, health, age and probe calibration.
12.1 Probe health
The health indicator is an index from 0 to 100% summarising probe quality from four factors: signal noise, slope, offset and probe age. It also appears on the home screen among the indicators.
Range
Rating
What to do
90–100%
Excellent
Reliable probe — no action needed
75–89%
Good
Normal operation — just watch the trend
55–74%
Fair
Recalibrate and plan probe replacement
below 55%
Poor
Replace the probe — unreliable readings
12.2 Logging a probe replacement
The screen shows the installation date, how many days the probe has been in use and the recommended replacement date. When you change the probe, tap Log probe replacement to reset that count.
12.3 Two-point calibration
Probe calibration is what lets the equipment display the real pH of your aquarium. It is not required in order to measure KH — see section 2.4.
You will use the pH 7.00 and pH 10.00 solutions supplied with the product. For each point:
Rinse the probe with drinking water — never with reverse-osmosis or distilled water.
Immerse the probe in the buffer solution.
Wait about 10 minutes for the reading to stabilise.
Tap Calibrate pH 7.00 — or Calibrate pH 10.00 — to send the command.
