Using Your Miller Powered Air Purifying Respirator (PAPR)

Using Your Miller Powered Air Purifying Respirator (PAPR)

Warning: Read and follow all labels and the Owner’s Manual. You work hard, so does your Miller
respiratory protection. Learn how to keep it that
way for years to come. Hi, I’m Bryan and I’m here to tell you about the proper care and use of your Miller Powered Air
Purifying Respirator or PAPR, as I’ll refer to it throughout this video. Before we begin, let’s talk
a little bit about weld fume. The ACGIH, who sets the
Threshold Limit Value, or TLV, this refers to the
airborne concentrations of chemical substances
and represents conditions under which it is believed
that nearly all workers may be repeatedly exposed on a daily basis over a working lifetime
without adverse affects. The other organization is OSHA, who sets the Permissible Exposure Limit, or PEL, on each particulate. This is the enforceable, regulatory limit on the amount or
concentration of a substance that a worker may be exposed to. OSHA utilizes a hierarchy of controls. When implementing controls, to make your work environment compliant, it’s important to start at
the top of the hierarchy. If taking action at this level doesn’t reduce exposure levels enough, continue to the next step. At the top of the hierarchy we have process
modification/substitution, which eliminates the exposure
before it can even occur. This is considered the most
effective control method. Next is engineering controls which entails a physical
change to the workspace, such as ventilation. Then we have work practice controls which involve processes
where workers do something to avoid overexposure,
such as body positioning. And finally, personal protective equipment which requires that workers wear something to prevent overexposure. This is where respiratory
protection comes in. Your personal safety
relies upon the proper use and care of your PAPR. The fit of your PAPR is key and proper care of your equipment can keep it working effectively. In the end, the quality of your work and your protection relies upon it. Now let’s get to know a
little bit more about the care and use of your PAPR system. OSHA classifies PAPRs as
loose-fitting respirators, which means fit testing is not required. PAPRs have a NIOSH
certification of 42 CFR, part 84 and assigned
protection factor of 25. The purpose of a PAPR is to
filter solid dust particles, metal fumes and mist
from your breathing zone. Some secondary benefits
include eye protection and heat stress relief. Your PAPR system should contain
the following components: the head assembly, which
could be a respiratory version of the hard hat T94i or T94 helmet. This includes your helmet, headgear and a flame-resistant head seal. The blower unit with
padded belt, HEPA filter, pre-filters and a spark guard. The breathing tube with
a flame-resistant cover, shoulder straps, lithium ion batteries and battery charger, a flow meter, all in a job site toolbag. Before each use be sure
to check the following: inspect the helmet and
head seal for any damages. Ensure that the front lens
holder is locked into position. Test the lens assembly battery
by turning on the helmet. Turn on the blower and check
that air is being supplied to the head assembly. If the over lens or
battery needs replacing, we’ll cover how to do
that later in this video. When wearing your
headgear, get in the habit of regularly checking the fit. Check the tightness of your headgear by adjusting the knob on
the back of the helmet. Turn to the left or the right until you reach the desired fit. Check the helmet tilt
angle by repositioning the lift control arm to
the best fitting slot. Check the balance and stability by adjusting your headgear depth. Check the distance between
your face and the helmet lens. To adjust, press the black
tab on the top and bottom of the pivot point and use your other hand to slide the headgear
forward and backwards. Make sure to set each side equally. There are two cover lenses on your helmet, an outside lens and inside lens. Here are the steps if you need
to change either of these. To replace the outside cover lens, first remove the cover lens holder. Do this by pulling on the
four points on either side of the helmet. This then gives you access
to the outside cover lens. To remove that, use the
top center indentation in the helmet to pull and
release the cover lens from the head assembly. You now have access to the lens assembly, which gives you access
to the inside cover lens. To make it easier to change
the inside cover lens, remove the lens assembly from the helmet by pushing up on the
tab on the top center, and giving the lens a slight
push from inside the helmet. On the back side of the
lens is where you’ll find the inside cover lens. To remove, use the top center indentation, to slightly slide the inside
cover lens from the helmet. Replace by sliding the new lens back into the lens assembly. And then replace the lens
assembly back into the helmet. Replace the outside cover
lens by sliding the tabs into either side of the helmet and replace your cover lens holder. Your helmet is now ready for use. If the battery on your
helmet lens needs replacing, follow these steps. Remove the cover lens
holder and cover lens from the head assembly, then remove the lens from the helmet. From there, you have
access to the battery tray. Slide out of the lens assembly and replace with a CR 2450 lithium battery. Reinstall the battery into the holder and the tray into the lens assembly. From there, reinstall
the lens into the helmet and replace your cover
lens and cover lens holder. Now let’s walk through
a few of the controls on the helmet lens. This lens features an auto-on and auto-off, along with a grind mode
and low battery light. The mode selection allows
you to adjust between weld, which gives you shade
control from eight to 13 in half shade increments. Cut, which changes from
shades five to seven. Grind, which is set at
a light state of three and X-Mode, which again,
allows you to adjust between shades eight and 13
just like with Weld Mode. X-Mode though, darkens based on the arcs electromagnetic
field, not the brightness. It’s ideal in outdoor and
low-amp TIG applications or for out-of-position welds. Nearby welding may affect X-Mode if they’re within a 12 foot radius. The variable shade adjustment
can be done through the plus and minus on the right side of the lens. A few of the other features in this lens are delay and sensitivity. To adjust these, hit the adjust button. The delay is how long
the lens will stay dark after the welding is complete. And sensitivity adjusts how
quickly the lens darkens when the weld is started. This lens also features InfoTrack 2.0, which contains a clock with alarm, the arc time, and arc count. Now let’s check your filter assembly. First assure that the
spark guard, pre-filter and HEPA filters are undamaged
and installed properly and that the filter door
is completely closed. Filters need to be replaced
when they’re dirty or damaged. Never try to wash or blow them out. To change the filter, follow these steps. First, insert the spark
guard into the filter cover, then insert the pre-filter
on top of the spark guard and finally insert the HEPA
filter on top of the pre-filter. From there you can then
insert the filter cover into the blower motor. First slide the tabs in and
then click the cover closed. A good rule of thumb is
to change the pre-filter at the same time of a
cover lens or as needed. Change your HEPA filter as a decrease in normal battery life
is noticed, or as needed. Check the airflow level
using the flow meter to ensure airflow is above
170 liters per minute. To do this, disconnect the breathing tube from the head assembly. Then insert the flow meter
into the breathing tube. Verify that the breathing tube is straight and untwisted and that the flow meter is in an upright position. From there you can start the blower. Airflow is adequate if the
flow meter ball moves above the min mark. If the flow meter ball
is below the min mark, do not use the respirator. Here are a few troubleshooting tips when checking your airflow. Check the battery to make
sure it has enough charge, there should be more
than one bar of charge and no alarm sounding. Ensure the spark guard is clean and if airflow is still too low, change your pre-filter and retest. If airflow is still low, change
the HEPA filter and retest. If airflow is still not adequate, it’s time for a new blower unit as this may be a mechanical issue. You’ll also want to make
sure the airflow alarms are in proper working order. To do this, disconnect the blower tube from the head assembly. Block the airflow by placing your hand over the breathing tube
until the alarm sounds and the blower vibrates. This will take about 15 to 20 seconds. If alarm does not function,
do not use the respirator. The battery should be fully
charged and properly inserted into the unit. To insert the battery, slide
the battery into the blower, until the battery snaps into position. To remove it, push the
battery unlock button and pull the battery out of the blower. If your battery isn’t
charged, follow these steps. Connect the charger cord
to the battery terminal. Then connect the charger to
the 120-volt AC receptacle. The charger’s light will turn red when the battery is charging and green, once it is fully charged. The battery will stop charging when the unit is fully charged. This typically takes about three hours. The battery should last four to five hours on high speed and six
to eight hours on low. Things that can impact
the life of your battery include particulate
concentration, the filter, the age of your battery and your altitude. Next let’s take a look
at the breathing tube. Give it a good inspection
and replace if it’s damaged or the inside of the tube is dirty. Push the breathing tube connector onto the head assembly. Then connect the other
end to the blower unit. This is done by aligning the pins and turning clockwise to tighten. Check the belt assembly and make sure it is in good condition. If you see any noticeable
holes, burns or tears, it is time to be replaced. Be sure to inspect the belt pad and the shoulder straps as well. The unit is powered by
using the on/off button. Note there is also a danger
indicator and alarm light. This is to alert you if you
have a low battery power, reduced airflow due to a dirty filter, a blocked breathing tube or other issues. There is also a battery level indicator. The blower speed control
can switch from low to high. To start the blower, press the on button for one to two seconds. During start up, the danger
indicator alarms will flash and sound and the unit
will vibrate momentarily. The blower always stars on low speed. To switch to high speed,
push the on button again. To stop the blower, press the off button for two to three seconds
until the blower stops. Proper fit of your PAPR
system will maximize comfort for all day wear. Slide the should straps
over your shoulders and fasten the belt around your waist. Adjust the straps and belt to
a snug but comfortable fit. Put on the head assembly and adjust the headgear to fit snugly. Push the breathing tube
connector onto the head assembly, then tighten the head seal
drawstring to establish a tight seal around your neck. You’re now ready to use your PAPR. Just as important as a proper
fit, maintaining your system will keep it running at peak performance for years to come. For best results, wipe down your equipment with a soft cloth and a
mild soap, water solution. Let it air dry. Never use solvents or
abrasive cleaning solutions to clean the respirator. Keep water and other fluids
out of the blower assembly. When not in use, it’s best to store it in the job site toolbag. You owe it to yourself to be sure that your Powered Air Purifying Respirator is in optimal working order. Every welding
environment is different and needs to be evaluated by a qualified Industrial
Hygienist to determine the appropriate course of
action for fume controls. For more information

2 thoughts on “Using Your Miller Powered Air Purifying Respirator (PAPR)

  1. The fume extractor in the background, what are the two nozzles on the Intake that are facing upwards?

  2. I have a skull guard hard hat with a halo adapter. I know its a "loose fitting respirator" as the video states but would a hardhat reduce the effectiveness of a t94i-r?

Leave a Reply

Your email address will not be published. Required fields are marked *