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TECH TIP: Screws should line up and screw together with just fingers. Take your time and finger tighten
before using tools. If binding occurs, stop and report an issue.
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Do not use any tools for phx42 repairs that have not been authorized by LDARtools support.
Replacing the Scrubber Media
Scrubber identified under the “external parts” section of the manual contains scrubber media
consisting of:
• Poly filter disk x 3
• Activated Charcoal
• Purafil select
The purpose of this media is to provide air filtration. It's connected to a 2nd pump inside the machine
and it allows clean air to mix with the sample air so higher ppm readings can be measured.
As it filters air the "Purafil" portion turns from fuchsia to white. Anything in between is fine. The rate
of the color change is determined by the amount of filtering that is happening. If clean air is being
drawn through the filter, it will last for months. If the filter is working hard it could last days or
weeks.
When the Purafil select’s color turns white, it is time to replace scrubber media. If you do not change the
scrubber media, you might experience odd calibration issues.
1. Contact LDARtools Technical Support before starting the procedure.
2. Place the phx42 in Sleep Mode.
3. Use the Scrubber Spanner Wrench to loosen the Scrubber Chamber Cap.
Once loosened, you should be able to unscrew it by hand.
4. Remove the first poly filter disk (LDAR#42416).
5. Dump the activated charcoal (LDAR#42414) out of the scrubber.
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