It is possible to check a thermocouple with a properly calibrated D.C. millivolt meter. At 32°F, the millivolt reading should be 0.00. This can be checked by inserting the
thermocouple into an ice bath.
The millivolt reading at 72°F should be 1.134.
When using the following chart, the temperature at the terminal connections must be noted. This temperature is called the Junction Temperature.
The following chart lists the thermocouple millivolt readings from 200°F to 600°F.
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| O | V | E | N |
| T | E | M | P |
|
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| 200°F | 250°F | 300°F | 325°F | 350°F | 400°F | 425°F | 450°F | 500°F | 550°F | 600°F |
J | 90°F | 3.26 | 4.77 | 6.30 | 7.06 | 7.83 | 9.37 | 10.14 | 10.91 | 12.46 | 14.00 | 15.53 |
U | 88°F | 3.32 | 4.83 | 6.36 | 7.12 | 7.89 | 9.43 | 10.20 | 10.97 | 12.51 | 14.05 | 15.59 |
N | 86°F | 3.37 | 4.88 | 6.41 | 7.17 | 7.94 | 9.49 | 10.26 | 11.03 | 12.57 | 14.11 | 15.65 |
C | 84°F | 3.43 | 4.94 | 6.47 | 7.23 | 8.00 | 9.54 | 10.31 | 11.09 | 12.63 | 14.19 | 15.71 |
T | 82°F | 3.49 | 5.00 | 6.53 | 7.29 | 8.06 | 9.60 | 10.37 | 11.14 | 12.69 | 14.23 | 15.76 |
I | 80°F | 3.55 | 5.06 | 6.59 | 7.35 | 8.12 | 9.66 | 10.43 | 11.20 | 12.74 | 14.28 | 15.82 |
O | 78°F | 3.60 | 5.11 | 6.64 | 7.40 | 8.17 | 9.72 | 10.49 | 11.26 | 12.80 | 14.34 | 15.86 |
N | 76°F | 3.66 | 5.17 | 6.70 | 7.46 | 8.23 | 9.77 | 10.55 | 11.32 | 12.86 | 14.40 | 15.94 |
| 75°F | 3.69 | 5.20 | 6.73 | 7.49 | 8.26 | 9.80 | 10.57 | 11.35 | 12.89 | 14.43 | 15.97 |
| 74°F | 3.72 | 5.23 | 6.76 | 7.52 | 8.29 | 9.83 | 10.60 | 11.37 | 12.92 | 14.46 | 15.99 |
| 72°F | 3.78 | 5.29 | 6.82 | 7.58 | 8.35 | 9.89 | 10.66 | 11.43 | 12.97 | 14.51 | 16.05 |
T | 70°F | 3.83 | 5.34 | 6.87 | 7.63 | 8.40 | 9.95 | 10.72 | 11.49 | 13.03 | 14.57 | 16.11 |
E | 68°F | 3.89 | 5.40 | 6.93 | 7.69 | 8.46 | 10.00 | 10.78 | 11.55 | 13.09 | 14.63 | 16.17 |
M | 66°F | 3.95 | 5.46 | 6.99 | 7.75 | 8.52 | 10.06 | 10.83 | 11.61 | 13.15 | 14.69 | 16.23 |
P | 64°F | 4.01 | 5.52 | 7.05 | 7.81 | 8.58 | 10.12 | 10.89 | 11.66 | 13.20 | 14.74 | 16.28 |
| 62°F | 4.06 | 5.57 | 7.10 | 7.86 | 8.63 | 10.18 | 10.95 | 11.72 | 13.26 | 14.80 | 16.34 |
| 60°F | 4.12 | 5.63 | 7.16 | 7.92 | 8.69 | 10.24 | 11.01 | 11.78 | 13.32 | 14.86 | 16.40 |
BEARING, CONVEYOR - REPLACEMENT
A.Remove conveyor from oven and place on a flat work surface.
B.Remove connecting links from conveyor belting. See Installation and Operating Instructions Manual.
C.Remove conveyor belting from conveyor. Remove drive sprocket from drive shaft
D.Move drive shaft or idle shaft toward end of conveyor, and shaft with bearing will now slip out of holding bracket.
E.Replace bearing and reassemble.
Low Profile – | 17 |
