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[jbruce]

Good morning Auber folks,

I bought a thermocouple for kilns from you...

https://www.auberins.com/index.php?main_page=product_info&cPath=20_3&products_id=39

The 6 inch, 8 gauge variety.  I am having trouble with it.  I am using it with a SYL-2352P.  Settings are:

Sn = 0 for K type
Pb = 0 no offset

To check the thermocouple I put it in hot water and cold water with another K type thermocouple from my bbq grill.  The readings were within a degree of each other for the following:

temperature displayed by SYL-2352P when thermocouple is in ice water = 32F
temperature displayed by SYL-2352P when thermocouple in hot water = 200F

I fired my kiln with it yesterday with ramps that go to cone 05 = 1888F.  The kiln stopped way before it should have.  My kiln sitter had a cone 04 cone in it and the kiln sitter cone slumped when the temperature was reading 1500 or so on the  SYL-2352P.  This means the temperature was 1945 (cone 04) - 1500 (thermocouple reading) = 445F off.  I had full size cones for 06 and 05 and 04 on the center shelf of the kiln.  All of them slumped so the temperature was definitely cone 04.  Not sure what to do.  Baffled as to what happened.

[Kkane]

1. The 450F off error could be due to the wrong polarity. The probe, the ceramic oval base and the sensor cable all have polarity. The probe lead with red mark is negative. The probe lead without red mark is positive. The yellow wire from sensor cable is positive. Red wire from sensor cable is negative. There are marks on the ceramic base for positive and negative. If the polarity is reversed twice, the reading will be similar to the actual temperature (when actual temperature increases, the display temperature increases), but it will introduce some offset error. 

2. In additional to the provided yellow sensor wire, did you use any additional extension wire?

3. At boiling temperature, your 200F reading could be a little bit low. You should get around 210F. It could be due to the same reason above, or it could be due to your improper calibration. You can refer this guide (https://drive.google.com/open?id=0B14y9IPNqGuoVVIwWjRfSVMwaGs) or this video (https://www.youtube.com/watch?v=rRKwwEZw1Rc) for ice water calibration.

[jbruce]

It was double polarity problem.  I fixed the connections and tried another firing to cone 05 and the thermocouple was within 10 degrees F.

[Kkane]

Thanks for your updates.

If you want to achieve higher accuracy, you can run an ice/water calibration, then you can use the offset parameter Pb to offset the display.