Orp reading zero

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divingdon
Posts: 57
Joined: Tue Mar 22, 2011 8:35 pm

Orp reading zero

Post by divingdon »

I purchased and Orp and Salinity probes sometime ago and today I decide to install them. The salinity probe is working just fine but the Orp probe is reading 0. I have tried different expansion port channels and even different cables but the probe still reads 0. I have not tried to calibrate it yet I was just trying to get it functioning. The probe itself was still stored in its shipping fluid and was unused until today. Any help would be great
rimai
Posts: 12881
Joined: Fri Mar 18, 2011 6:47 pm

Re: Orp reading zero

Post by rimai »

Can you run the i2c scanner code and post the results?
Roberto.
divingdon
Posts: 57
Joined: Tue Mar 22, 2011 8:35 pm

Re: Orp reading zero

Post by divingdon »

I ran the i2cscanner.ino I found here and below are the results

ÿ
I2CScanner ready!
starting scanning of I2C bus from 1 to 128...
addr: 1 addr: 2 addr: 3 addr: 4
addr: 5 addr: 6 addr: 7 addr: 8 found!
addr: 9 addr: A addr: B addr: C
addr: D addr: E addr: F addr: 10 found!
addr: 11 addr: 12 addr: 13 addr: 14
addr: 15 addr: 16 addr: 17 addr: 18
addr: 19 addr: 1A addr: 1B addr: 1C
addr: 1D addr: 1E addr: 1F addr: 20 found!
addr: 21 addr: 22 addr: 23 addr: 24
addr: 25 addr: 26 addr: 27 addr: 28
addr: 29 addr: 2A addr: 2B addr: 2C
addr: 2D addr: 2E addr: 2F addr: 30
addr: 31 addr: 32 addr: 33 addr: 34
addr: 35 addr: 36 addr: 37 addr: 38 found!
addr: 39 addr: 3A addr: 3B addr: 3C
addr: 3D addr: 3E addr: 3F addr: 40
addr: 41 addr: 42 addr: 43 addr: 44
addr: 45 addr: 46 addr: 47 addr: 48
addr: 49 addr: 4A addr: 4B addr: 4C found!
addr: 4D found! addr: 4E addr: 4F addr: 50 found!
addr: 51 addr: 52 addr: 53 addr: 54 found!
addr: 55 addr: 56 addr: 57 addr: 58
addr: 59 addr: 5A addr: 5B addr: 5C
addr: 5D addr: 5E addr: 5F addr: 60
addr: 61 addr: 62 addr: 63 addr: 64
addr: 65 addr: 66 addr: 67 addr: 68 found!
addr: 69 addr: 6A addr: 6B addr: 6C
addr: 6D addr: 6E addr: 6F addr: 70
addr: 71 addr: 72 addr: 73 addr: 74
addr: 75 addr: 76 addr: 77 addr: 78
addr: 79 addr: 7A addr: 7B addr: 7C
addr: 7D addr: 7E addr: 7F addr: 80

done



Also I am now seeing the salinity probe starting to drift
rimai
Posts: 12881
Joined: Fri Mar 18, 2011 6:47 pm

Re: Orp reading zero

Post by rimai »

The module is there.
4C = ORP
When you enter calibration, does it show zero?
Roberto.
divingdon
Posts: 57
Joined: Tue Mar 22, 2011 8:35 pm

Re: Orp reading zero

Post by divingdon »

I tried to calibrate even thou I didn't have the calibration standard and got no reading on the zero point and the 470 point.
rimai
Posts: 12881
Joined: Fri Mar 18, 2011 6:47 pm

Re: Orp reading zero

Post by rimai »

PM for RMA.
Roberto.
williet
Posts: 7
Joined: Sun Sep 16, 2012 9:36 am

Re: Orp reading zero

Post by williet »

rimai wrote:PM for RMA.
Hi

I am having the same problem.

Any Advice ?
rimai
Posts: 12881
Joined: Fri Mar 18, 2011 6:47 pm

Re: Orp reading zero

Post by rimai »

Have you tried calibration?
What numbers are you getting?
Roberto.
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