I had three dual input Type-K thermocouple digital thermometers sent to me which are brand new right out of the plastic bubble pack.
The manufacturer specified accuracy is in the temperature range of -328 to 2798°F, the accuracy should be ±(0.1% rdg +1.4°F)
Please give me your opinion as to whether the tests pictured below indicate acceptable readings or not.
1) I put all of the included thermocouples junctions together in air space and after letting them stabilize took this photo . . .
2) I put the included thermocouples in an ice bath, let the temperatures stabilize and took this photo . . .