Math Functions

Three Math functions are provided:

• Capture of maximum and minimum sensor readings
• Apply a linear equation to the input data and display results
• Filter noise from sensor data.

To Program Math Functions

1. Press the Math button.
2. Press Enter to continue. Alternatively, pressing the Math button again clears (i.e., resets) the maximum and minimum readings recorded since the last reset.

3. Toggle the arrow buttons as needed to select Input A or Input B.
4. Press Enter.
5. Press Enter for the Max/Min function. Toggle the arrow buttons as needed to select among:
   • Temp C (degrees Celsius)
   • Temp K (Kelvin)
   • Linear (MX+B or M[X+B])
   • Sensor (in volts, millivolts or ohms)
6. Press Enter.

To specify a linear equation:

1. Ensure you have carried out the steps described under To Program Math Functions, above.
2. Press Enter repeatedly until Linear Equ MX+B appears in the lower half of the LCD.
3. Toggle the arrow buttons as needed to select MX+B or M(X+B), where M is the slope of the line, B is the y-axis offset in the first equation, and X is the sensor reading.
4. Press Enter.
5. Enter a numeric M value.
6. Press Enter.
7. Toggle the arrow buttons as needed to select among linear X variables:
   • Temp C
   • Temp K
   • Sensor
8. Press Enter.
9. Toggle the arrow buttons as needed to select among linear B variables:
   • +SP1
   • -SP1,
   • +SP2
   • -SP2
   • Value
   NOTE: SP stands for setpoint.
10. Press Enter.
11. Enter a numeric B value.
12. Press Enter.

To specify filtering:

1. Ensure you have carried out the steps described under To Program Math Functions, above.
2. Press Enter repeatedly until Filter On appears in the lower half of the LCD.
3. Toggle the arrow buttons as needed to select Filter On or Filter Off.

4. Toggle the arrow buttons as needed to select between 02 and 64 filter points. The default value is 08. Exponential filtering is applied to a moving average of the number of points selected.
5. Press Enter.
6. Toggle the arrow buttons as needed to select between a 01% (the default) and 10% filter window. If a single reading is greater than the filter window value, the reading is treated as intentional and the filter is restarted. Percentages are calculated over the full scale range.

Open topic with navigation