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Maintenance Guide - Truvami tag XL

1. Operating Conditions​

1.1 Environmental Conditions​

The truvami tag XL is designed for reliable operation in harsh industrial environments when used within the specified operating limits.

  • Operating temperature: –20 °C to +60 °C
  • Relative humidity: 0 – 95 % RH, non-condensing
  • Ingress protection: IP67

Operating the device outside these limits may reduce performance, battery lifetime, or device integrity.

1.2 Installation Environment​

The device is suitable for both indoor and outdoor installations.

To ensure long-term reliability:

  • Avoid continuous exposure to corrosive chemicals or atmospheres
  • Avoid permanent exposure to saltwater or marine environments
  • Avoid installations where standing water can accumulate on the mounting surface

Before installation, ensure the mounting surface is clean, dry, and free of rust or debris.

1.3 Mechanical Mounting Conditions​

The truvami tag XL is typically mounted using integrated screw-on magnets.

Recommended mounting surface characteristics:

  • Flat and even
  • Ferromagnetic
  • Structurally stable
warning

Corroded or uneven mounting surfaces may reduce magnetic holding force and accelerate corrosion of mounting components.

1.4 Maintenance Triggers and Inspections​

As part of regular maintenance, the following conditions should be monitored:

  • Visual inspection every 2 months is recommended
  • If the reported battery level drops below 20 %, battery replacement is recommended (see Chapter 2 below)
  • If any rust or corrosion is observed on mounting magnets or screws, the affected components must be replaced (see Chapter 3 below)
  • Periodically verify that the device remains securely attached to the mounting surface, especially in high-vibration environments
  • Inspect the device housing for visible damage that may affect enclosure integrity

Regular inspections help ensure continued safe and reliable operation of the device.


2. Battery Replacement​

The truvami tag XL is powered by lithium primary batteries.

  • Battery type: 2 × AA lithium primary cells
  • Recommended model: Energizer L91

2.2 When to Replace the Battery​

Battery replacement is required when one or more of the following conditions are met:

  • The reported battery level drops below 20 %
  • A low battery status is reported by the system

2.3 Battery Replacement Procedure​

To replace the batteries, proceed as follows:

  1. Remove the device from the mounting surface
  2. Using an appropriate screwdriver, loosen and remove all enclosure screws
  3. Carefully lift and remove the enclosure cover
  4. Remove both depleted batteries
  5. Insert two new Energizer L91 AA lithium batteries, observing correct polarity
  6. Ensure all seals and gaskets are correctly positioned
  7. Close the enclosure securely to maintain IP67 protection (please check the details below)
  8. Reattach the device to its original mounting surface
warning

Improper sealing of the enclosure may compromise ingress protection.

Enclosure Closing and Torque Recommendation​

The tag XL device uses the 353113 enclosure, which incorporates #6-32 threaded metal inserts that are overmolded into the plastic housing (not heat-staked). These fasteners are used to secure the enclosure cover and to compress the sealing O-ring, ensuring environmental protection.

The enclosure is sealed using an elastomer O-ring with a hardness of Shore-A 70. Proper tightening of the enclosure screws is required to achieve sufficient O-ring compression while avoiding damage to the threaded inserts, enclosure housing, or sealing elements.

Recommended tightening torque (starting point):

  • 2.5 – 3.5 in-lbs (0.28 – 0.40 Nm)

Applying excessive torque may result in insert rotation, damage to the plastic housing, or degradation of the O-ring sealing performance. Insufficient torque may lead to inadequate sealing.

It is recommended to use a calibrated torque driver and to tighten enclosure screws evenly to ensure consistent compression of the O-ring.

2.4 Battery Handling and Disposal​

  • Do not recharge lithium primary batteries
  • Do not short-circuit or expose batteries to heat or fire
  • Dispose of used batteries in accordance with local environmental regulations

3. Magnet and Screw Inspection (Corrosion Prevention)​

3.1 Inspection Interval​

Regular inspection of mounting components is required to prevent corrosion-related issues.

  • A visual inspection every 2 months is recommended
  • In corrosive or harsh environments, more frequent inspections may be required

3.2 Components to Inspect​

During inspection, check the following components:

  • Mounting magnets
  • Magnet screws
  • Contact surface between the magnet and the mounting surface

3.3 Signs of Corrosion​

Inspect all components for the following signs:

  • Visible rust
  • Discoloration
  • Surface pitting
  • Reduced magnetic holding force

3.4 Corrective Actions​

If corrosion is detected, take the following actions:

  • If any magnet shows signs of rust, please replace the magnet immediately
  • If any screw shows signs of rust, please replace the screw immediately

Corroded components must not be reused, as this may lead to:

  • Reduced holding force
  • Device detachment
  • Compromised enclosure integrity

3.5 Magnet References​

Original Magnet​

Possible Replacement Reference (Rubber-Coated)​

This option is recommended for environments where surface protection or increased corrosion resistance is required.

Alternative Replacement Reference​

3.6 Preventive Measures​

To minimize corrosion risk:

  • Clean magnets and mounting surfaces regularly
  • Avoid installation on already corroded metal surfaces
  • Replace magnets proactively in highly corrosive environments

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