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Customizing Measurement Units

The Net DAQuiri makes it easy to convert generic sensor signals to measurement units and ranges that are meaningful for your application. The following screen shot shows how I/O signals are viewed in a handful of different measurement units (GPM, cm, YES/NO, ON/OFF).

Many different I/O units

Customizing Voltage Inputs

By default, analog voltage inputs are displayed in Volts. Click on the '...' button to bring up a form where you can choose your own units and range.

For example, let's say we were measuring water pressure with a ProSense PTD25-10-0030H pressure transmitter that outputs 0 to 10V for a range of 0 to 30psi.

  1. Select the I/O type as 'Analog Input (0-10V)' and save changes.
  2. Press the '...' button for that input.
  3. Select measurement units of 'psi' in the drop down.
  4. Enter 0 as the '0% Value'.
  5. Enter 30 as the '100% Value'.
Units for Analog Voltage Inputs

Customizing 4-20mA Current Inputs

Customizing 4-20mA analog current inputs is done in the same manner as voltage inputs. The only difference is that 4mA is considered the '0% value'.

For example, let's say we want to measure power consumption using an AccuAMP ACTR005-42L-F true RMS current sensor that outputs 4 to 20mA for a measured range of 0 to 5 Amps. We can show the power consumption in Watts by settings the units as follows:

  1. Select the I/O type as 'Analog Input (4-20mA)' and save changes.
  2. Press the '...' button for that input.
  3. Select measurement unit of 'W' in the drop down.
  4. Enter 0 as the '0% Value'.
  5. Enter 600 as the '100% Value', since 5 Ampsrms x 120VAC = 600 Watts.
Units for Analog Current Inputs

Customizing Discrete I/O

Discrete signals can be one of two states, such as: on/off, true/false, yes/no, high/low, or open/closed. Net DAQuiri allows you to pick the pair of discrete values that are the most descriptive for your application.

Click the '...' button and select the desired units in the drop down box. You can also check the 'Invert' box to swap the meaning of the logic states.

Units for Discrete I/O

Show an Event Counter

A counter can be used to keep track of how many times a discrete event occurred. For example, it may be desirable to know how many times a switch has been toggled, or how many times a motor turned on within a given time frame.

  1. Select the I/O type as 'Discrete Input (sink or source)' and save changes.
  2. Press the '...' button for that input.
  3. Select 'Counter' from the 'Logic States' drop down box.
  4. If desired, toggle the 'Invert' check box to toggle between counting rising or falling edges of the signal.
Set Pulse Counter

Show Time of the Last Change

Sometimes it is useful to look up the last time (the most recent time) an event occurred.

  1. Press the '...' button for the desired discrete input.
  2. Select 'Last Change' from the 'Logic States' drop down box.
Set Last Change

Show On Time (Run Time)

Sometimes it is useful to know how long an input signal has been in the 'on state' or running. For example, we might want to track how long a pump has been running

  1. Press the '...' button for the desired discrete input.
  2. Select either 'On Time' or 'Total On Time' from the 'Logic States' drop down box.
  3. If desired, toggle the 'Invert' check box if you want to change which logic level you consider to be 'on'.
Set On Time

'On Time' shows the the amount of time the input has been in the on state as of this moment. 'On Time' is zero if this input is in the 'off state'.

'Total on Time' shows the amount of time the input has been in the on state since the timer was cleared last or when the Net DAQuiri was powered up. Total on time is cleared if Net DAQuiri loses power."




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