Wheelspin
Well-Known Member
Hi
Let me start by saying that I know nothing about PID's or electronics so I'm way out of my depth.
I have a GERFRAN 500 PID controlling a 4000 w heater in my HLT. The temp readout on the unit does not agree with the temps I measure with 2 normal thermometers. The PID reads about 8 deg C high.
Funny thing is that when I first tested it it was pretty accurate about 1 or 2 degrees out. Then I swopped the J probe for new one and the new probe started to to read about 8 deg C high.
AH ha, I thought, the new probe is faulty but when I put the old probe back, it too was reading about 8 deg C too high.
I've checked the wiring as best I can and cannot see anything amiss.
I can't seem to find anyway to calibrate the GEFRAN 500.
Could there be some voltage leakage or something like that ?
Any suggestions would be much appreciated.
Let me start by saying that I know nothing about PID's or electronics so I'm way out of my depth.
I have a GERFRAN 500 PID controlling a 4000 w heater in my HLT. The temp readout on the unit does not agree with the temps I measure with 2 normal thermometers. The PID reads about 8 deg C high.
Funny thing is that when I first tested it it was pretty accurate about 1 or 2 degrees out. Then I swopped the J probe for new one and the new probe started to to read about 8 deg C high.
AH ha, I thought, the new probe is faulty but when I put the old probe back, it too was reading about 8 deg C too high.
I've checked the wiring as best I can and cannot see anything amiss.
I can't seem to find anyway to calibrate the GEFRAN 500.
Could there be some voltage leakage or something like that ?
Any suggestions would be much appreciated.