Williamson Dual-Wavelength Output Descriptions and Functionality:
The Williamson Dual-Wavelength (DW) pyrometer includes a series of output parameters that can be used to confirm the proper operation and accuracy of the sensor. These outputs can be viewed as a display option and can also be configured as an output in the Configure I/O submenu. Measured parameters include filtered temp, unfiltered temp, signal strength, signal dilution, ambient temp, and single-wavelength temp. For each output, we can select a parameter, range, and scale. Below we have included more information on each parameter regarding what it does and when it is used.
Viewing Measured Parameters in Display Mode:
For both use with an Interface Module and stand-alone, the arrow keys can be used in display mode to show the different parameters. Press the arrow keys to cycle through the different measured parameters. When using the arrow keys on the IM the main display will stay the same.
On the Interface Module, the main display can be changed by pressing and holding the enter key. This process can be repeated to cycle through the different measured parameters.
Setting Measured Parameters as an Output:
The different parameters can be programmed as outputs using the Configure I/O setup mode option. To access this function press the menu button to enter setup mode and use the arrow keys to scroll to Configure I/O. When using the Interface Module two output parameters can be set under Output 1 and Output 2. In this submenu, the range, scale, and parameter can all be selected.
Filtered Temp/Unfiltered Temp:
The filtered temperature is the measured temperature value after signal conditioning is applied. Typically this is used when averaging time or a temperature hold is enabled. The unfiltered temperature is the raw temperature measurement before the signal conditioning is applied.
The Williamson DW can output or display a real-time Signal Strength (SS) value. Without optical obstructions or hot background influences, this value represents the true emissivity of the measured surface. The signal strength value is represented on a 0 to 2.000 scale, with a value of 1 indicating the measured surface is a blackbody. This parameter can provide critical information for troubleshooting. A lower than expected reading could indicate misalignment or an obstructed optical path and a higher than expected value indicates interference from background reflections. This value can provide information regarding the surface characteristics of the target and also confirm the sensor is properly aligned ensuring accurate readings. This value can be set as a display or output and can also be used as an ESP filter.
The Signal Dilution (SD) value is a measure of infrared energy. This is an important troubleshooting tool and indicates if the sensor is viewing enough energy to make a reading. Lower than expected SD values would indicate misalignment or obstructed optical path. This feature can also be used as a dirty window indicator to ensure proper operation. This value can be set as a display or an output and can also be used as an ESP filter.
The ambient temperature parameter is a troubleshooting tool to make sure that the sensor does not suffer any damage from overheating. The sensor is rated up to 150°F/65°C. For ambient temperatures higher than this we do offer cooling options. This output can be used to confirm that the sensor is within the high temperature limit and will not experience any heat damage.
This feature can be used to add versatility to the DW model as both outputs can be simultaneously available. This added information can be helpful in troubleshooting as well as comparing to single-wavelength models.
For more information regarding the functionality of Williamson pyrometers please click the below link to speak with one of our temperature experts.