Custom scaled sensor values

Connect Tank reads raw sensor values in milliamps (mA), volts, and pulses. Use the Custom Scaled settings in Remote Manager to convert raw values for both analog inputs and the digital pulse counter into meaningful values for your environment, such as when converting 4-20 mA current to liters or pulses to amp hours.

Refer to the sensor's manufacturer specifications for details about conversion rates and calculations.

Analog input examples

In Remote Manager, both the current loop and voltage input settings use the following fields to convert current or volts into meaningful values for your environment.

• Custom Scaled Sample Unit: Unit of measurement that you are converting to, such as liters, watts, miles per hour, degrees, and so on.
• Custom Scaled Sample Value (y1): Point 1 custom value associated as follows:
  • Current loop: 4 mA
  • Voltage: 0 V
• Custom Scaled Sample Value (y2): Point 2 custom value associated as follows:
  • Current loop: 20 mA
  • Voltage: 10 V

Use the manufacturer specifications for your sensor to calculate the y1 and y2 values.

4-20 mA current loop input example

This example demonstrates how to determine y1 and y2 in liters for a 4-20 mA current loop input. This graph is similar to what you find in sensor manufacturer's specifications.

Note When calculating values, there must be a linear relationship between y1 and y2. If the sensor's measurements are not linear, the calculated values will not be accurate.

The following image shows you enter this information in Remote Manager.

Voltage input example

This example demonstrates how to determine y1 and y2 in candles for a voltage input. This graph is similar to what you find in sensor manufacturer's specifications.

Note When calculating values, there must be a linear relationship between y1 and y2. If the sensor's measurements are not linear, the calculated values will not be accurate.

Digital pulse counter example

Using pulse counting, Custom Scaling Factor, Custom Scaled Sample Unit, and a time range, the digital pulse counter provides the appropriate measurement for your environment. The following equation shows how pulses are converted:

• Pulses between reporting intervals  x  Custom scaling factor (in Custom Scaled Sample Unit) =  reported measurement
• Pulses between reporting intervals: Number of pulses between reporting intervals, which is based on report settings in Remote Manager (see Configure device (report) settings).
• Custom scaling factor: Refer to your sensor's manufacturer specifications for this value.
• Custom scaled sample unit: Unit of measurement for your application.
• Reported measurement: Reported value in the unit of measurement for your application.

For example, we want to measure rainfall in inches using a rain gauge with a digital pulse counter. The manufacturer specifications for our sensor state that 1 pulse equals 0.011 inches.

We configure Connect Tank to send reports to Remote Manager every hour. Connect Tank reads 100 pulses from 11:00 to 12:00.

100 (pulses) during one hour x 0.011 (inches) = 1.1 inches

The digital pulse counter device reports a rainfall amount of 1.1 inches between 11:00 and 12:00.