PM2 module trouble

Voypok

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Hi Guys
I've got used the pm2 module and salinity probe. Several times tried to calibrate it but didn't get any result.
I connected the probe to my other apex and it got calibrated and working well. Seems that problem is the pm2 unit.
Apex EL sees the unit in system and light on the unit is lit...
My question is: Is it any way to check if the unit is working or possibility to reprogram it?
 
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Voypok

Voypok

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Do you have a temp probe hooked up to the PM2 also? IIRC its a no go for calibration without a temp probe.
Didn’t work…, looks like PM2 done…
 

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ZombieEngineer

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If you calibrated with TC on but no probe connected previously, you need to use manual calibration. The reading will be affected enough the acceptable range will never hit. Just watch the value and when it hasn't changes for at least 20 seconds it's settled.
 

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