You should get approximately 5 compliance checks to 5 different units out of 1 vial of reference dust. We recommend this because the longer you keep the reference dust in the asperator (or spray bottle), the higher the chance that moisture will get in and cause the dust to merge, which will cause your device to not monitor for the correct size dusts.

We recommend that a compliance check is carried out every 3 months. However, in activities where your unit is exposed to extremely high levels of dust, this should be done more frequently to ensure your device is working as required.

The sensor is expecting a range of dust particles between 0.3 and 40ug during this test, when the dust sample is applied the laser will size the dust particles and organise them in to the correct bins and then analyse the data, if all bins are filled this confirms the laser is working across the complete range and the unit will confirm this with a ‘PASS’ indication.

In the event that your device fails its compliance check, we recommend you that you run a sensor cleaning operation as highlighted in ‘Compliance check’ section of the user manual.

You’ll get enough reference dust to carry out a compliance test for an entire year. You’ll get

• 1 x base station that the device sits in
• 1 x hood with a hole for the dust particles to be sprayed through
• 4 x vials of reference dust which contains different sized particles
• 4 x asperators (or spray bottles)

We recommend regularly carrying out the following actions in the order they appear:

1. Check for external damage to the device. Plastic parts should not be cracked or broken which could affect
2. the IP rating of the product.
3. Check for damage or wear to the main product membrane, LED icons and power/function switch.
4. Check for damage to the USB data / charge port.
5. Remove the silicon cover and regularly cleaning with a damp warm cloth to prevent stray dust particles.
6. Wipe the unit down with a damp cloth at the end of the day after use.
7. Use a small paint brush clean the any external dust or debris caught within the grille.
8. Use canned compressed clean air, spray the device inlet for 10 to 15 seconds to clean the dust path.
9. Wipe down the XD1+ inlet surfaces with a damp cloth to remove any external dust and debris.

Carrying out a compliance check to your device tests that your it’s monitoring for the correct size dust particles. This means that when your device is in use, you know that it’s monitoring for all
particulates ranging from PM1 to PM10.

As long as the monitor continues to pass its compliance check, and the structure of the monitor is as manufactured (i.e. no damage to the housing etc.) the unit can continue to be used.

As the test dust is used to check the performance of the monitor, there has to be very tight tolerances in the process, as you’ll see on the dust vial, the dust has a wide spread of particle sizes from 0.36 μm to 40 μm, once the vials have been opened, moisture can cause the particles to amalgamate, which would lead to the monitor failing a compliance check, as the particles won’t be of the correct size spread.

This depends on the frequency and concentration of the dust when the compliance checks are done. In internal lab testing we have compliance checked 3 monitors on one bottle of compliance dust.

• 1 x base station that the device sits in
• 1 x hood with a hole for the dust particles to be sprayed through
• 4 x vials of reference dust which contains different sized particles (enough reference dust to carry out a compliance test for an entire year)
• 4 x asperators (or spray bottles)