Operational Tips
• Before a sensor’s data can be logged, a “Read” operation on the “Configure Sensor” screen must be performed. The “Begin Monitor” or “Begin Log to File” functions on the “Monitor / Verify Sensor” screen uses the unit selection on the “Configure Sensor” screen to display the log message on the screen and to store the data to the log file. The 4-20 mA set points stored in the sensor will determine the range on the y-axis of the graph on the “Monitor / Verify Sensor” screen. A message regarding this tip is provided in the “Messages” text field area when the user tries to “Read” or “Write” without having selected a unit.

• The “Application Settings” for the 2250, 2350, 2450, and 2750 can only store the 4 mA and 20 mA values, therefore, anytime the user wants to perform a “Write” or “Read” operation, the units need to be selected. A message regarding this tip is provided in the “Messages” text field area when the user tries to “Read” or “Write” without having selected a unit.

• For the 2250, there is “Specific Gravity of Fluid” entry that allows users to compensate for the density of the fluid based on the temperature of the fluid. The 0250 software will take the specific gravity, 4 mA and 20 mA set points entered by the user, calculate the equivalent psi value and compare this value to the minimum and maximum values that can be entered. If the calculated value is below the minimum value or above the maximum value, an error message will be displayed in the “Messages” text field and the user will have to re-enter the values.

• For the 2250 and 2450, when reading values back from these sensors using the “Read” command, there may be a very minor difference in the value stored since the sensors can only store integer values inside the sensor. The values that read back will be the values that are used in the 4-20 mA calculation for the logging mode.