Speedy
Mechanical
- Jun 5, 2001
- 229
I have a problem as follows;
I want to detect a temperature rise within a specific time period.
Essentially I am concerned with the relative rise and not the absolute value. I am therefore, subtracting 2 temp values recorded at a certain time interval apart, say 0.5 secs.
My question is;
Is there any off-the-shelf unit that will do this. My experience of Temperature Controllers (CAL) tells me that they don’t have a time function. They are only a function of temperature as such, and not time.
The current technology on the machines in question, is becoming obsolete. I want to replace the current purpose built board with an off-the-shelf unit if possible.
The unit should have 2 relay outputs, one for the temp rise and the other when a max temp is reached. The later is a safeguard.
There is a PLC on the machines but we don’t want to touch the program if possible. For retro-fits we would like our service guys to simply pop in the new unit.
Any ideas?
Speedy
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I want to detect a temperature rise within a specific time period.
Essentially I am concerned with the relative rise and not the absolute value. I am therefore, subtracting 2 temp values recorded at a certain time interval apart, say 0.5 secs.
My question is;
Is there any off-the-shelf unit that will do this. My experience of Temperature Controllers (CAL) tells me that they don’t have a time function. They are only a function of temperature as such, and not time.
The current technology on the machines in question, is becoming obsolete. I want to replace the current purpose built board with an off-the-shelf unit if possible.
The unit should have 2 relay outputs, one for the temp rise and the other when a max temp is reached. The later is a safeguard.
There is a PLC on the machines but we don’t want to touch the program if possible. For retro-fits we would like our service guys to simply pop in the new unit.
Any ideas?
Speedy
