X-Series Logger SIM Card Installation

The cellular model of the X3 Environmental Data Logger contains an internal modem for cellular telemetry. The SIM card slot on the modem is compatible with 4G-capable SIM cards that are a 3FF SIM size (12 x 15 mm; Micro-SIM). Before purchasing or installing a SIM card, ensure the SIM is set up according to the article below:


Installation Instructions

Before installing a SIM card, ensure the logger is disconnected from all power sources. Statically ground yourself prior to and while contacting any of the electronics inside the logger. Failure to do so may result in a static discharge that can be harmful to the electronics.

  1. Remove the green wire from its track at the base of the data logger’s aluminum housing.
    1. Apply downward pressure on the top bulkhead while removing the wire, as air pressure inside the bulkhead may be pushing upward, making it difficult to remove. If needed, tweezers or needle-nosed pliers can be used.
    2. The middle port plug can also be removed to relieve some of the built-up pressure.

Figure 1: Remove the green wire holding the top bulkhead.


  1. Gently pull up on the top bulkhead to separate it from the data logger’s base.
    1. The data logger circuitry should now be exposed. Be cautious of the cables still connecting the top bulkhead and the electronics.

Figure 2: Separate the top bulkhead.


  1. Locate the SIM card slot on the embedded modem at the back of the data logger.
    1. Orient the SIM card with the electronic chip facing upward and the beveled edge in the top right.
    2. Insert the SIM card until it is flush with the edge of the embedded modem.

Figure 3: SIM card installation.


  1. Re-install the top bulkhead while aligning it with the blue set screw.
    1. It is recommended to remove the middle port plug underneath the logger to push any air pressure out of the bulkhead during re-installation.
    2. Be careful not to pinch any wires during re-installation.
    3. If available, replace the desiccant and apply a light layer of O-ring grease.

Figure 4: Orient and re-install the top bulkhead.


  1. Re-install the green wire while keeping slight downward pressure on the top bulkhead.
    1. When fully installed, a small piece of the green wire should overlap the entry point for each access in the future.

Figure 5: Re-install the green wire.