LALman wrote:
Just let it get down to 40 then set it to 200 Set the external probe close to the top of the inlet next to the heater...
Inlet T vs external probe
40C vs 31C
100C vs 40C
140C vs 50C
170C vs 60C
190C vs 70C
200C vs 80C
ultimately at equilibrium 200C vs 100C.
So, variation but time for a new heater/sensor cable.
You could just make a calibration table for it to correct for the wrong readings.
Have you put the external probe down inside the inlet to make sure what the actual temperature of the inlet is and not just at the top?
You may want to send a message to Agilent and see if there is a calibration function in the electronics that isn't one of the main settings. There used to be some maintenance only functions you could access using a code on the keypad, but not sure if the newer units still have that. On the 5890 the .5 then Enter would reboot the main board, but that is the only one I remember.