Generally, the mA input (when enabled) is used for remote adjustment of the Emissivity parameter.
However, some applications demand that the emissivity parameter be adjusted (different materials) and the T-ambient correction parameter. T-ambient correction aims to remove the measurement error cause by hotter surrounding energy reflecting off the object being measured. Typically this would be the hotter furnace or
It is not possible to adjust the two parameters simultaneously. However, it is possible to toggle the function of the mA input between the two parameters. The last value is held until the next "live input".
A typical application would be some kind of re-heat furnace. The emissivity parameter would be set once, before the process starts. for the specific material. The input function would then be switched to T-ambient correction during the heating cycle with the value continuously updated by the control system (t/c-mA conversion, 2nd sensor or a modelled value inferred from some other measurement).
Special Note
This method would almost never be used with a 2C or ratio sensor. For this reason only remotely adjusting the emissivity is described. It is possible to use this function on an E1R or E2R in which case the Slope value is adjusting as long as the sensor is in 2C mode. In 1C mode, the emissivity parameter would be adjusted. This is useful when needing to use an ratio sensor in 1C mode,
Example Application:
Example Function:
Required Settings
Step 1 - Modify XTC command using any terminal program
Special Note
With this function enabled, it is not possible to remotely control the laser or remotely reset post-processing functions.
Step 2 - Setting via DataTemp Multidrop
Step 3 - Set the mA input type and scale theT-ambient signal input scaling
Special Note
Only the T-Ambient sensor input can be scaled. The remote emissivity input must conform to standard scaling
Further information can be found here Link
4-20mA
0-20mA
