Table 5 Converting Engineering Units From Percent To Degrees - Honeywell XYR 6000 User Manual

OneWireless™ Series User Manual
3. 2BPreparation
3.6. Setting the Range and Engineering Units
Table 5. Converting Engineering Units from Percent to Degrees
Step Action
In order to speed up the process of scaling the engineering units, it is recommended to change the update
rate of the sensor prior to adjusting the engineering units. Follow steps 1-1.4 in table 3 to change the
update rate.
WARNING
The following steps require reading the sensor output. If the sensor is currently installed in a hazardous
atmosphere reading this output should be done via Wireless Builder or a mobile station. Do not remove
the cover from the sensor in a hazardous atmosphere.
1 Prior to performing this procedure, the sensor should be mounted in the application and the sensor shaft
should be coupled to the valve.
2 In Wireless Builder, verify the range units are set to their factory defaults of EU@100 % = 314 and EU@ 0
% = -4. If they are not, follow the steps in table 4 to reset the factory defaults.
3
On the range tab, change the CAL_UNIT to deg.
4 Position the valve to the desired 0° location. Wait until the output stabilizes and record the sensor output at
this location. This value is noted as "PV0" in the equation below.
The following step contains an equation used to convert the engineering units. As as alternative to using
this equation you may use the file, "WCX1 Engineering Units Calculator" which can be found on the WCX
Series documentation CD that was included with the sensor.
5 Calculate the Engineering Units at 0% and 100% using the following equations:
EU@0% = -(PV0*2.5) - 10
EU@100% = 794 + EU@0%
Please note – the 794 value is a constant that is inherent to the setup of the device. This constant has no
relevance to the user other than its use in the above formula.
Example
With the valve at 0° position the sensor output is reading 25 PCT. The value for EU@0% and EU@100%
would then be:
EU@0% = -(25*2.5) – 10 = -72.5
EU@100% = 794 + -72.5 = 721.5
The above formula will result in increasing values when rotating the shaft clockwise. If it is desired to have
decreasing values with clockwise rotation then flip the polarity of EU@0% and EU@100%. In the above
example EU@0% would equal 72.5 and EU@100% would equal
6 In Wireless Builder, in the Main tab, set unit to OOS. In the Range tab, input these two values in the
appropriate fields. After inputting the new EU Values, in the Main tab, set unit to AUTO
7 Adjust the valve to the 0° position and confirm that the sensor output now displays 0 DEG. Reposition the
valve to another location and confirm the value sensor output value is approximately as expected.
8 Reset update rate by following steps 3 – 3.6 in table 3.
18 Honeywell Sensing and Control
50040849
Issue 3
-721.5.