Overview

CTid is a technology created by eGauge which allows the eGauge meter to obtain information about a connected CT or Sensor. This information can include model, manufacturer, serial number, amperage rating (if CT), and other information about the sensor. The information is stored on a chip embedded in the CT or Sensor, and can only be read by EG4xxx model units (eGauge Core and eGauge Pro). When inputs are scanned for CTid sensors, they are automatically configured instead of the user's traditional drop-down selection box.

https://kb.egauge.net/link/175#bkmrk-ctid-enabled-sensors

CTid enabled sensors also contain a locator LED that can be blinked from the eGauge configuration interface. This can be used to identify which sensor is connected to which port, in the event the leads were switched or untraceable.

Prerequisites

• CTid is compatible with EG4xxx model meters or newer.
• If you are not familiar with programming the eGauge, please refer to the Getting Started section and ensure access and permissions to configure the eGauge before continuing.
• Ensure the sensors and Sensor Hub (if needed) are installed correctly before continuing.

Instructions

Step 1: Log into the eGauge meter and access the Installation Settings page. For details please see: Sign in and access Installation Settings

Step 2: Locate the blue "CTid" above the sensor drop-down menus:

Step 3: Select the sensor ports that have CTid-enabled sensors connected, and press "Scan Checked Sensors":

A green check-mark will show for each successfully detected sensor. The model and serial number is displayed for each sensor. Press the plus or minus sign (1) to expand or collapse additional information for the sensor. Every CTid sensor has an LED, which can be blinked by clicking the "Blink LED" button (2). To delete a configured sensor, press the "x" button (3). When finished, press "Back to Settings" to the left of the "Scan" button:

Step 3: When all selected ports have finished scanning, click Back to Settings to return to the installation Settings page to complete the rest of the meter configuration.

Read the section below for some additional information regarding register configuration for CTid Sensors.

After scanning and returning to the Installation Settings page, the inputs will show the sensor detected in blue to indicate it was programmed via CTid:

Finally, configure registers to record the data from these sensors:

Choosing "S" (Sensor) for the type will record the value of the sensor. Temperature sensors record °C, pulse counts are unit-less, dry contact (low voltage sensor) records voltage and CTs record amperage.

To record power, use "P" (Power) and choose the CT input (S5 and S6 in this example) and the voltage line it is on.

Instantaneous values may be found in the channel checker:

Some sensors require additional registers to convert raw signal input to more meaningful measurements. Please see individual product pages for more information.

Troubleshooting and Tips

• Issue: I don't have a blue CTid button 
  • Solution: Update your firmware to the most recent version. 
• Issue: My CTid sensors are not scanning.
  • Solution: If using a Sensor Hub with powered sensors connected by RJ-11, be sure the Sensor Hub is being powered by 5 Vdc and the selection switch is positioned toward the port being used.
• Issue: The location LED is lit constantly on my sensor.
  • If the Sensor Hub is powered by greater than 5 Vdc this can indicate sensor damage.
• Tip: It is not recommended to extend the RJ-11 leads on eGauge DC CTs. If the DC CTs must be located father away from the eGauge than the lead allows the recommendation is to extend the RJ-45 connection between the Sensor Hub and the eGauge. 

Additional Resources

• Sensor Hub & Sensors
• Getting Started
• How To: Install the ESH044 Sensor Hub