Calibration of Partical Counter.

Probably against a reference source.
Reset is probably either software or amplifier gain....
Just guessing..._{terms and conditions apply, by reading this answer you have agreed to E-mail me one tin of tuna}
Del

Although I do not understand your question, it seems that you may be trying to calibrate something. Either, "Calibration of Partical Counter",or "How Laser Partical is calibrated".

I don't believe that "Laser Partical" can be calibrated, so I'd ask the manufacturer of the "Partical Counter" you are trying to calibrate.

OOps !!

its Laser Partical Conter and Not Laser partical. Its partical Counter which is used in measuring the solid particals in Oil / Air for testing Oil / Air cleanliness.

The word is 'particle", at least in English. There is no definition for 'partical'.

Calibration would require at least one well mixed suspension having a known concentration of particles of the correct size in the correct liquid, measured across the same distance as that to be used in the final application. A complete calibration would require several such suspensions at different concentrations of contamination.

Hi, It's ben a few years since I used it last, so I'll try and reply on a faded memory.

As I remember, you need to place a blank vial in first, and draw a calibration reeding for your sample (usually a solvent and a surfactant, dipersant, without any of your solids or without trigeering coagulation). Then you place a vial with the dispersion and reed it.

It should work on rayleigh light reflectivity with monochromatic light, usually a green laser. So I do not believe that the machine comes with a few standard sizes of dispersed particles for the user to calibrate. If you do have such standard particle sizes, you need 3 points (minimum, but usually 3) for calibration.

I think its a straight forward measurement, that if it doesn't show what you expect, you are better off contacting the manufacturer.

Good Luck!

For liquid Particle Counters there are 2 options that I have used in a previous life designing Particle Counters..

1. Mono-dispersed Polystyrene spheres. These spheres are bought with an exact diameter certificate.

A known polystyrene diameter (particle), usually the smallest daimeter that the machine is rated to see (count), is run thru the Particle Counter and the output voltage is tweaked to the design reference voltage. IE, a 10 micron sphere is set to have a 1 millivolt output.

Then another size sphere (usually the largest size the counter can see (before saturation) is run and its output voltage is tweaked to the design reference.

Then, if the electrical circuitry is good, it is a linear curve for any partical that is a size in-between. If not linear, as long as every machine coming off the production line is repeatable, an algorithm for the non-linear curve can be devised and used.

2. Poly-dispersed Spheres. A mixture of different partical sizes in solution, but the ratio of all the sifferent sizes is known.

I don't quite remember the process, but if you know how many particals of each size the counter is supposed to see, you tweak it until it corresponds with the solution mixture.

For particle counters that would be used in "oil" type applications (looking for 0-Ring breakdown in a hydraulic cylinder) we used a special type of dirt. This dirt was dried and weighed as exactly as possible and then put into an oil solution. The sizes and quantitiy of the various sizes of particles was established a long time ago and used as the reference.

Both kits were used in house to set up the counters, and also sold to the end user (or their calibration house) for doing calibration once in the field.

We also made Air particle counters, for clean room type applications. I was not too involved with them, but I believe that the same process was used except the somehow the particles where introduced into the air stream being sampled.

http://www.hach.com/hc/browse.exploded.category.products/PRODCAT_LIQUID_PARTICLE_COUNTERS/NewLinkLabel=Liquid+Particle+Counters/BrandCode=HI/MinWeight=0.01/SESSIONID%7CBmc0T0RFeU5DWm5kV1Z6ZEVaWlVGTmFNVEkwTXc9PUNUZzJPVA==%7C