Using Your Miller Supplied Air Respirator (SAR)

Using Your Miller Supplied Air Respirator (SAR)


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 Brian and I’m here to tell you about the proper care and use of your Miller Supplied Air Respirator or SAR 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 effects. 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 SAR. The fit of your SAR 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 SAR system. OSHA classifies SARs as
loose fitting respirators, which means fit testing is not required. SARs have a NIOSH
certification of 42 CFR Part 84 and an assigned protection factor of 25. The purpose of a SAR system 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 SAR system should contain
the following components: the respiratory version of
the T94i helmet assembly which includes the helmet, headgear and a flame resistant head
seal, the C50 air regulator, and a breathing tube with
a flame resistant cover, a belt all in a jobsite tool bag. 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 C50 and check that air is being supplied
to the head assembly. If the cover 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 backside of the lens is where you will 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 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 starting. This lens also features InfoTrack 2.0 which contains a clock with alarm, an arc time and arc count. In addition to regulating
the grade D breathing air, the C50 can also cool
air entering the hood by up to 50 degrees Fahrenheit. The hose comes in both a
coiled or straight model. You’ll want to inspect the full hose to be sure there aren’t
any tears or worn spots and that the fittings are tight. The Miller BreatheAir Filtration System is available in either a
box or panel configuration and can be used to supply
filtered air to the SAR system. To connect the hose to the box or panel insert the male end of the hose into the quick connect fitting. Ensure your line pressure meets your SAR system configuration which is provided in the Owner’s Manual
or product spec sheet. Any airflow in the head assembly can be adjusted using the
knob on the C50 air regulator. Next let’s take a look
at the breathing tube. Give it a good inspection and replace it if it’s damaged or the
inside of the tube is dirty. To connect insert the end
on to the head assembly then, on the other end align the pins with the muffler on the C50
and turn clockwise to tighten. Check the belt assembly and make sure it’s in good condition. If it’s time to replace you’ll see noticeable holes, burns or tears. Proper fit of your SAR system will maximize comfort for all day wear. First, place the C50
against your lower back, it can be worn vertically or horizontally depending upon what
will be most comfortable for your welding position. Fasten the belt around your waist and adjust to a snug but comfortable fit. Put on the head assembly and adjust the headgear to fit snugly. Tighten the head seal drawstring to establish a tight seal around the neck. You’re now ready to use your SAR. 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. When not in use, it’s best to store it in the jobsite tool bag. You owe it to yourself to assure that your Supplied Air 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,
visit MillerWelds.com.

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