PH stuck at 6.99

[chachew]

So i reset the RA+ to factory defaults...Now my PH probe reads 6.99 and never ever changes to anything else.. I have tried with RO/DI water as well as tank water that is about 8.2 and the RA controller never changes the probe reading..

[rimai]

Did you remove the probe from the storage bottle?
You can't measure pH on RO/DI water. There is a good article from Randy that talks about pH on RO/DI and meters:
http://reefkeeping.com/issues/2005-05/rhf/index.php#8
But you should be able to read tank water.

[chachew]

Yes i removed it from the storage bottle and tried to get it to read some tank water but the reading never changes. It just stays at 6.99 while in either the storage bottle or the tank water. Before i reset the controller back to default preloaded code it was reading 5.99 while in the storage bottle. Did i somehow reset the calibration by reseting the controller back to default loaded code?

[ishtak]

Hey Roberto,

I've got the same thing happening. I updated the libraries on my unit a week or so ago and forgot to write down the PH calibration figures. I redid the calibration and now it doesn't change from 6.99. I'll try doing another calibration tonight and let you know if that changes anything.

Justin

[rimai]

Did i somehow reset the calibration by reseting the controller back to default loaded code?

I don't think so, but let's check.
Please load this code:

Code: Select all

#include <Salinity.h>
#include <ReefAngel_Features.h>
#include <Globals.h>
#include <RA_Wifi.h>
#include <Wire.h>
#include <OneWire.h>
#include <Time.h>
#include <DS1307RTC.h>
#include <InternalEEPROM.h>
#include <RA_NokiaLCD.h>
#include <RA_ATO.h>
#include <RA_Joystick.h>
#include <LED.h>
#include <RA_TempSensor.h>
#include <Relay.h>
#include <RA_PWM.h>
#include <Timer.h>
#include <Memory.h>
#include <InternalEEPROM.h>
#include <RA_Colors.h>
#include <RA_CustomColors.h>
#include <RF.h>
#include <IO.h>
#include <ORP.h>
#include <AI.h>
#include <PH.h>
#include <WaterLevel.h>
#include <ReefAngel.h>

void setup()
{
  ReefAngel.Init();  
}

void loop()
{
  ReefAngel.LCD.DrawText(0,255,10,10,"Analog:");
  ReefAngel.LCD.DrawText(0,255,10,20,"PHMax:");
  ReefAngel.LCD.DrawText(0,255,10,30,"PHMin:");
  ReefAngel.LCD.DrawText(0,255,10,40,"PH:");
  ReefAngel.LCD.DrawText(0,255,70,10,analogRead(PHPin));
  ReefAngel.LCD.DrawText(0,255,70,20,InternalMemory.PHMax_read());
  ReefAngel.LCD.DrawText(0,255,70,30,InternalMemory.PHMin_read());
  ReefAngel.LCD.DrawText(0,255,70,40,ReefAngel.Params.PH);
  ReefAngel.Refresh();
}

Let me know what numbers you have on the screen.

[chachew]

Ill test it out in a few hours when i get done diving.

[chachew]

Analog: 427ish
PHMax: -1
PHMin: -1
PH: 699

[rimai]

Sounds like the calibration values went bad in the transition.
Let's load a new memory file to reset them back.
File->Sketchbook->Example Codes->InitialInternalMemory
This code should put it back the factory calibration values.
Let me know if this works.

[chachew]

Ok that makes sense. I did reload through the wizard once and I would get a failure unless I loaded the code to the internal memory. So it probably overwrote the calibration...ill try this when I get home and see what happens.

[chachew]

Thanks Roberto, that was the fix! I reloaded the InternalMemory and then reloaded the Preloaded Code and now the PH probe is reading correctly!