OM-257 075A 2012−08 Impact Series Auto-Darkening Welding Helmets www.HobartWelders.
TABLE OF CONTENTS SECTION 1 − WELDING HELMET SAFETY PRECAUTIONS − READ BEFORE USING . . . . . 1 1-1. Symbol Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-2. Arc Welding Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-3. Proposition 65 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 1 − WELDING HELMET SAFETY PRECAUTIONS − READ BEFORE USING helmet 2012−02 Protect yourself and others from injury — read, follow, and save these important safety precautions and operating instructions. 1-1. Symbol Usage DANGER! − Indicates a hazardous situation which, if not avoided, will result in death or serious injury. The possible hazards are shown in the adjoining symbols or explained in the text. Indicates special instructions.
NOISE can damage hearing. Noise from some processes or equipment can damage hearing. Wear approved ear protection if noise level is high. READ INSTRUCTIONS. Read and follow all labels and the Owner’s Manual carefully before installing, operating, or servicing unit. Read the safety information at the beginning of the manual and in each section. Use only genuine replacement parts from the manufacturer.
1-4. Lens Shade Selection Table Process Electrode Size in. (mm) Arc Current in Amperes Minimum Protective Shade No. Suggested Shade No. (Comfort)* Shielded Metal Arc Welding (SMAW) Less than 3/32 (2.4) 3/32−5/32 (2.4−4.0) 5/32−1/4 (4.0−6.4) More than 1/4 (6.
SECTION 2 − SPECIFICATIONS Viewing Field 3.81 x 1.85 in. (97 x 47 mm) Reaction Time 0.00004 sec (1/25,000) Available Shades Darkened State: No. 8 − No. 13 / Light State: No. 3 provides continuous UV and IR protection Sensitivity/Grind Mode Control Adjusts for varying ambient light and welding arc Delay Control Slows lens dark-to-light state between 0.1 and 1.
SECTION 3 − OPERATING INSTRUCTIONS 3-1. Helmet Controls 1 2 3 4 5 1 2 3 4 Reset Button (See Section 3-2) Low Battery Indicator (See Section 3-2) Variable Shade Control (See Section 3-4) Sensitivity/Grind Mode Control (See Section 3-5) Lens Delay Control (See Section 3-3) 5 3-2. Reset Button And Low Battery Indicator The auto-darkening lens turns on (darkens) automatically when welding begins and turns off 15 − 20 minutes after welding stops.
3-3. Lens Delay Control 1 Lens Delay Control The lens delay control is used to adjust the time for the lens to switch to the clear state after welding. The delay is particularly useful in eliminating bright after-rays present in higher amperage applications where the molten puddle remains bright momentarily after welding. Lens delay adjusts from min (0.10 second) to max (1.0 second). 1 3-4. Variable Shade Control (No. 8 − 13) 1 Variable Shade Control (No.
3-5. Sensitivity/Grind Mode Control 1 Sensitivity/Grind Mode Control Weld Mode Use control to make the lens more responsive to different light levels in various welding processes. Use a Mid-Range or 30−50% sensitivity setting for most applications. It may be necessary to adjust helmet sensitivity to accommodate different lighting conditions or if lens is flashing On and Off. Adjust helmet sensitivity as follows: Adjust helmet sensitivity in lighting conditions helmet will be used in.
SECTION 4 − ADJUSTING HEADGEAR There are four headgear adjustments: headgear top, tightness, angle adjustment, and distance adjustment. 1 Headgear Top Adjusts headgear for proper depth on the head to ensure correct balance and stability. 1 2 Headgear Tightness To adjust, turn the adjusting knob located on the back of the headgear left or right to desired tightness. 3 Angle Adjustment (Not Shown) Seven slots on the right side of the headband provide adjustment for the forward tilt of the helmet.
SECTION 5 − REPLACING THE LENS COVERS 5-1. Replacing Outside Lens Cover ! Never use the auto-darkening lens without the inside and outside lens covers properly installed. Welding spatter will damage the auto-darkening lens and void the warranty. 1 Front Lens Holder 2 Lens Cover Remove front lens holder by pulling the holder away from the helmet. Remove lens cover from the holder. Replace lens cover and reinstall in holder. Reinstall holder in helmet.
5-2. Replacing Inside Lens Cover ! Never use the auto-darkening lens without the inside and outside lens covers properly installed. Welding spatter will damage the auto-darkening lens and void the warranty. 1 Lens Assembly 2 inside Lens Cover Remove the lens cover holder (see Section 5-1). Remove lens assembly. Remove the inside lens cover by prying the cover up at either thumbnail opening at each side of the cover. Slide cover it out of either side of frame.
SECTION 6 − REPLACING THE BATTERY To replace the battery, remove the auto-darkening lens assembly (see Section 5). 1 Battery Tray After removing the lens assembly, slide the battery holding tray out and remove the old battery. Replace with CR2450 lithium type battery (one required − Hobart Part No. 770 284). Be sure Positive (+) side of the battery faces up (toward inside of helmet). Reinstall the battery tray. To test, press the Reset button. The lens should flash dark twice.
SECTION 7 − INSTALLING OPTIONAL MAGNIFYING LENS 1 1 Optional Magnifying Lens Starting at the bottom, slide magnifying lens into the helmet retaining brackets. Align the magnifying lens with the auto-darkening lens assembly. Remove lens holding frame (with auto-darkening lens) from helmet shell. Remove auto-darkening lens from lens holder. Position lens holder with magnifying lens holding tabs facing toward you. From the bottom up, slide magnifying lens into position.
SECTION 9 − TROUBLESHOOTING Trouble Remedy Auto lens not On – autolens will not darken momentarily when the Reset button is pressed. Check battery and verify it is in good condition and installed properly. Also, check battery surface and contacts, and clean if necessary. Check battery for proper contact and gently adjust contact points if necessary. This is particularly important if the helmet has been dropped. Not switching – auto-lens stays light and will not darken when welding.
SECTION 10 − PARTS LIST 1 2 4 3 5 Figure 10-1.
Item No. Part No. Description Quantity Figure 10-1. Impact Series Auto-Darkening Welding Helmet 1 . . . . . . . . 770759 . . . . Headgear, Gray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 . . . . . . . . 770274 . . . . Diopter Lens 150X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . . . . . 770275 . . . . Diopter Lens 175X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . . . . .
SECTION 11 − LIMITED WARRANTY Effective January 1, 2012 LIMITED WARRANTY – Subject to the terms and conditions below. Hobart Brothers, Troy, Ohio, warrants to its original retail purchaser that the new Hobart equipment sold after the effective date of this limited warranty is free of defects in material and workmanship at the time it is purchased at the retailer. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OR MERCHANTABILITY AND FITNESS.
Notes Work like a Pro! Pros weld and cut safely. Read the safety rules at the beginning of this manual.
Hobart Brothers Co. Troy, Ohio 45373 USA Phone: 800-332-3281 Visit our website at www.HobartWelders.
