Copper corrosion meter
Copper corrosion meter
(OP)
Hi
I have a corrosion meter, a 9030 Plus corrater instrument that measures the corrosion of a copper probe in mils per year. This corrosion meter is connected to a Web Master Water Controller, that reads the 4-20mA signal.
So there are two displays, one for the corrater on the other one for the controller
On the configuration panel of the corrator I can change the “Probe rate 4-20 LOOP F/S”. This value defines the full scale for the 4-20mA. By default is 20MPY.
If I change this value to 1 for instance, the reading in the corrater stays the same but the reading in the controller is multiplied by 20.
I guess that this is changing the scale of the 4-20 signal. My questions are:
What is this value for? I mean, how do I know which is the correct value?
It is confusing also that when I change this value, the readings on the corrater stays the same and the readings on the controller change.
As far as I know, the only way to calibrate the system is to replace the copper probes.
Any help regarding this corrosion meter will be highly appreciated
Best regards
I have a corrosion meter, a 9030 Plus corrater instrument that measures the corrosion of a copper probe in mils per year. This corrosion meter is connected to a Web Master Water Controller, that reads the 4-20mA signal.
So there are two displays, one for the corrater on the other one for the controller
On the configuration panel of the corrator I can change the “Probe rate 4-20 LOOP F/S”. This value defines the full scale for the 4-20mA. By default is 20MPY.
If I change this value to 1 for instance, the reading in the corrater stays the same but the reading in the controller is multiplied by 20.
I guess that this is changing the scale of the 4-20 signal. My questions are:
What is this value for? I mean, how do I know which is the correct value?
It is confusing also that when I change this value, the readings on the corrater stays the same and the readings on the controller change.
As far as I know, the only way to calibrate the system is to replace the copper probes.
Any help regarding this corrosion meter will be highly appreciated
Best regards





RE: Copper corrosion meter
RE: Copper corrosion meter
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RE: Copper corrosion meter
You are right that replacing the probe is not a calibration procedure, but I guess that installing new probes is a way to check that the corrosion rate goes down to near a zero value and that the meter is working fine. I don’t know any other way to do it.
And you are right that the readings do not make much sense. Before going ahead trying to figure out why do I have that corrosion rate, the first thing I want to do is to make sure that the signals and the readings I am having are correct. And then from there, to decide whether the values are good enough for me or not.
What I don’t really understand is why changing the parameters in the corrater, the values in the same corrater do not change and the values in the controller do change. I don’t understand what is that useful for.
Thanks for telling me about the corrosion engineering forum, I didn’t see that one before, I will post my doubts there as well
Thanks again!