Channel Temperature Unit - Spectrum Controls Micro800 2085-IF16C-SC User Manual

Chapter 3: Configuring the 2085-IT8-SC/IT-16-SC Using CCW
The scaling formula with the channel bias applied is:
���� = �������� + ���� + ����ℎ�������������������� �������� ���� ����
Where:
���� is the final scaled reading shown in the input table
���� is the gain:
(���������������� �������� ���� ℎ �������� ���� ���� ���� − ���������������� ������������ �������� ���� ���� ���� )
���� =
(������������������������ �������� ���� ℎ �������� ���� ���� ���� − ������������������������ ������������ �������� ���� ���� ���� )
The User High/Low Limit value is based on the selected Input Type and the
selected Data Format. The Actual High/Low Limit value is the actual limits of
the selected Input Type without scaling. See table above.
For example, if Type B Thermocouple and EU×1 are selected in the
���� is the ADC signal data acquired at the terminal block and converted to the
configuration table, the gain will be 10 = (18200-3000) / (1820-300), m = 10.
For a Thermocouple input, this ���� is the actual temperature in °C. The circuit
corresponding data format.
board first reads in the ADC data count. Data count is then converted to
millivolts based on the gain setting of the ADC. Next the millivolt reading is
converted to temperature in °C based on the thermocouple curve specification.
���� is the offset: ���������������� ������������ �������� ���� ���� ���� − (���� ∗ ������������ ���� �������� ������������ �������� ���� ���� ���� ).
In above example, ���� = 3000 – (10 * 300) = 0, so if the thermocouple measured
10.0 degrees C, then the display of the reading for EU×1 is 10.0 * 10 + 0 +
����ℎ�������������������� �������� ���� ���� is an offset in integer format.
Channel Bias.
The Channel Bias value is only applied to the raw measured value. It will not be
applied to shift the minimum and the maximum points and the limits of the
selected Input Type range. If the final channel input reading is equal to, or goes
beyond, the minimum or the maximum point of the selected Input Type range,
Channel Fault and an Over/Under Range Fault bits will be set in the input table.
The other case is, if the final input reading reaches the Data Type limit (-32768
or +32767) before reaching the minimum or the maximum point of the selected
Input Type range, the same Fault bits will be set in the input table.

3.6.5 Channel Temperature Unit

The module provides a feature to select the temperature display unit for each
channel input reading if the channel is configured to use thermocouple
measurement with EU×1 or EU×10 Data Format used.
Index
0
1
Unit Note
ºC Default
ºF
User's Manual Pub. 0300322-01 Rev. B
3-25