Overview

This article covers the necessary steps and important information to consider when installing eGauge branded DC CTs with CTid.

Prerequisites

• Required installed hardware:
  • EG4xxx or newer eGauge meter
  • eGauge Sensor Hub (ESH044)
• It is not recommended to extend the RJ11 leads from the DC Sensor to Sensor Hub. It is recommended to use a longer RJ45 cable from the Sensor Hub to the eGauge.

Instructions

Step 1: Open the CT by gently pulling on the latch and then rotating the top open. Do not touch the polished ferrite core surfaces. Any oils or debris in that area worsens accuracy.

Step 2: Slide the CT over the conductor of the circuit to be measured. Make sure the arrow on the CT points in the direction of the primary current flow (the current flow that should yield a positive power reading).

Step 3: Close the CT by gently pushing down on top of the CT until the latch engages.

Step 4: Verify that the CT is fully closed by squeezing together the top and bottom parts of the CT.

Step 5: Optional: secure the CT to the conductor with a cable tie.

Step 6: Route the RJ-11 cable of the CT to the Sensor Hub such that they do not directly contact live terminals or bus bars.

Step 7: If not already completed, follow these instructions for Sensor Hub installation. Note: The DC CT is a powered sensor and the Sensor Hub requires +5V or USB connection for power (the USB port on the eGauge meter may be used for this). 

Step 8: Configure the CT in the eGauge settings. For details see: Configuring CTid sensors.

Troubleshooting and Tips

• Issue:The DC CT is not detected when scanned.
  • Solution:  Make sure the switch on the Sensor Hub port is toggled to the powered side.
  • Solution:  Verify that the correct port is being scanned.
  • Solution:  Verify that +5 Vdc is being applied to the Sensor Hub. Do not apply more than 5 Vdc or sensor damage may occur.

Additional Resources

• CT Selection Guide
• Configuring CTid Sensors
• Sensor Hub product page