Parallax Technology, Inc.

STANDARD TERMS AND CONDITIONS OF SALE

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LIMITED WARRANTY

LASER TUBE PRODUCTS

Parallax Technology, Inc. (Parallax), warrants to the original purchaser of each new CO2 laser tube of its own design and manufacture, that the laser tube is free from defects in material and workmanship . The obligation of Parallax, under this warranty is limited, at its option, to repair or replace parts and materials which prove to be defective under normal use and service, for a period of one year from the date of shipment, unless otherwise stated by Parallax.

OUT PUT POWER WARANTY

Parallax Technology, Inc. (Parallax), warrants to the original purchaser of each new CO2 laser tube of its own design and manufacture, that the output power of that laser shall not go below 80% of its rated value during the first 48 months of its shipment.
The obligation of Parallax, under this warranty is limited to refill the laser tube free of charge to the original customer.

We request that the purchaser obtain Return Authorization from Parallax and return the merchandise, postage prepaid and through "acceptable shippers"*, to Parallax Technology, Inc.

* Please contact Parallax Technology for a list of "acceptable shippers" and other shipping questions.

Units manufactured by others and included in, or supplied with, our laser tubes are not covered by this Warranty but carry the original manufacturers' warranty which is extended to our customers and maybe more restrictive.

The happening of any one or more of the following events will serve to void the warranty:

Claims

For claims relating to damage in transit and / or non-performance, please see below.

I. Damage in Transit. Upon arrival at the purchasers facility, all laser tubes should be inspected for obvious damage and /or breakage. If a laser tube has been damaged in transit, the transporting carrier must be notified immediately. You should also notify Parallax.

All containers and shipping material must be kept for inspection by freight carrier agent.

All of our prices are 'listed' FOB origin.
All of our products are 'sold' either:

• FOB Origin or
• CIF Destination or
• C&F Destination.

The above 'payment or transportation options' determine which party has what liability.

Please see definition of Payment / Transportation Options for a full discussion of the above.

II. Other Claims. Claims for non conforming or 'defective-upon-arrival' product must be made by calling or by writing within 15 days after delivery to the purchaser and any claims not made within that period shall be deemed waived and released.

We reserve the right to make changes in design at any time without incurring any obligation to install the same on units previously purchased.

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IN NO EVENT SHALL PARALLAX BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES DUE TO ANY CAUSE WHATSOEVER.

THE FOREGOING CONSTITUTES OUR SOLE LIABILITY AND THE PURCHASER'S SOLE REMEDY WITH RESPECT TO PRODUCTS SOLD BY US. EXCEPT AS THUS PROVIDED, WE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. NO PERSON, FIRM OR CORPORATION IS AUTHORIZED TO ASSUME FOR PARALLAX TECHNOLOGY, INC. ANY ADDITIONAL OBLIGATION OR LIABILITY NOT EXPRESSLY PROVIDED FOR HEREIN, EXCEPT IN WRITING DULY EXECUTED BY AN OFFICER OF PARALLAX TECHNOLOGY, INC.

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CONDITIONAL GUARANTEES

I. OUTPUT POWER

Parallax Technology, Inc. (Parallax) guarantees each new standard PLX series CO2 laser tube of its own design and manufacture that, the output power of the laser tube, when operated under specified parameters, shall be no less than twenty percent (20%) below its recommended maximum output for

The obligation of Parallax, under this guarantee, is to the original purchaser of the laser tube and is limited to RE GAS the laser tube that has failed to meet the above guarantee;
at NO CHARGE during the first Forty (40) months after shipment and
at a PRORATED CHARGE during the last Eight (8) months.

It is the duty of the purchaser to obtain Return Authorization from Parallax and return the laser tube, postage prepaid and through acceptable shippers, to Parallax Technology, Inc.

This guarantee shall not apply to any unit which our inspection shall disclose, to our satisfaction, has become low-power due to:
lack of proper cooling,
improper operation,
physical damage to exterior of front mirror (see below),
or other causes beyond our control.

The guarantee on output power is exclusively applicable to standard PLX series of laser tubes.
Products explicitly excluded from the above power guarantee are:

(a) Replacement tubes that are manufactured by Parallax according to customers' specifications or design,

(b) Replacement laser tubes that are manufactured by Parallax according to other manufacturers' design for physical size or output power,

(c) Laser tubes designed and manufactured by Parallax according to customer specified physical size or output power and

(d) Laser tubes manufactured by Parallax and using customer supplied components.

II. OPTICS

In the event we determine that the cause of power loss is due to 'optics' damage from inside that has occurred under normal use AND during the warranty period, we will replace the optics and recharge the tube at no cost to the purchaser. Damage to the outside surface of the output mirror is not covered.

If the warranty period has expired, the customer will be charged for the replaced 'optics' and for recharge, at prices in effect at the time.

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TWO MAJOR KNOWN CAUSES OF TUBE DAMAGE The single most important cause of damage to this type of laser tube is the improper application, or lack of application, of cooling fluid (most often water).

Parallax 'Laser Systems' are always protected against operation without fluid. The following discussion is mostly of interest to users of 'OEM Laser Tubes'.

Each laser tube requires a given amount of flowing fluid to get rid of the heat generated in its discharge region. The circulating fluid may go through either an air/fluid (radiator with a fan) or fluid/fluid (chiller) heat exchanger. It is important to provide enough flow and enough 'exchange' so as the fluid temperature will not rise much above 80 degrees F or about 27 C.

Some operators rely on their 'memory' to turn the coolant ON (turn ON the recirculator) before they turn ON the laser.

Sometimes they forget to turn ON the water first, then
about 90 seconds after they turn the laser ON, they realize the power is falling off rather fast. Suddenly they remember the fluid and quickly turn it ON.

A barely audible cracking sound (often one can not hear it) and there is no more power.

When we get the laser tube back, we immediately know what has happened (cold water hitting hot glass), but the customer insists 'we didn't do anything, it just stopped working'.

Always use a Flow Switch to disable laser operation in case of No Flow

and:
If you are using city water, filter it.
If you are using a closed circuit flow system, check the water and change it every six weeks or so, or drop a few drops of Algaecide in the recirculator. Better yet, use diluted Dow Frost.

We also recommend, in addition to the flow switch, an inexpensive visual flow monitor (spinning ball type) available from most catalogues Cole-Parmer, McMaster-Carr, etc.).

The second important cause of tube failure is due to improper operation; the desire to run the tube at a higher wattage that is recommended. It is unwisely thought that if a PLX60 (a 60 Watt tube ) can run at 75 Watts, then one can get 15 Watts for free. Why not operate at maximum available (as opposed to maximum recommended) power?

Without getting into the details of CO2 laser tube design and gas dissociation, it suffices to say that the extra 15% or 20% power is intentionally put there to carry the laser through the life time that we require of it. If it was meant to run at 75 Watts, it may have had a different length or different mirrors. Operating the tube in this mode is what is referred to as 'abuse or misuse' and will void the power guarantee.

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Now what about OPTICS damage? The only thing that is under the control of the purchaser/operator, as far as the optics are concerned, is the outside surface of the output mirror. Keep it clean from back sputter (blood, plastic fumes, pieces of cardboard) and oily fingers etc. etc. and you don't have anything to worry about !