19045 Farmington Road
Livonia, Michigan 48152
Phone (248) 476 - 4200 Fax (248) 476 - 5705

Machine Vision Components, Machine Vision Illumination Systems,
System Integration Services, and Turnkey Machine Vision Solutions Providers.

Machine Vision Products

Standard Calibration Sets for Manual Inspection Booths

and Calibration Sets for Automated Inspection Equipment

Referee Level Particle Standards (RLPS™)

The Referee Level Particle Standard (RLPS™) set is available for the training of inspectors and determination of the human visual inspector baseline using the MIB-100. The Basic RLPS™ set provides samples seeded with a single stainless steel particle of a specific size. The samples are produced using customer specified containers, stoppers, seals and fill level. The standard particle sizes range from 50µm to 900µm in diameter. This sample set is designed to train and evaluate the detection capability of individual inspectors. Following the training mode, the RLPS™ set can be used to generate a calibration curve. The calibration curve relates particle size to particle rejection probability. The use of the calibration curve provides an economically effective alternative to the re-determination of the rejection probability of each particle in the sampled container set. Without the calibration curve the rejection probability of each container in the sampled container set must be independently generated. This would entail multiple inspection of each container in the sample set to achieve 0.95% confidence results.

The RLPS™ - Basic set includes stainless steel and glass spheres ranging in size from 40µm to 1000µm. The RLPS™ Extended set also includes fibers, floaters and glass shards as sample contaminating particles for training purposes. The standard solution used in the fabrication of the set is WFI and is therefore clear in appearance. The test samples are prepared with particles of known sizes that are NIST traceable. The RLPS™ Extended set is not required but is the most popular set and is recommended for most customers. Additional containers may be purchased with a wide selection of contaminating particle upon request. We can also add discoloration or turbidity samples to the set.

Since the Referee Level Particle Standards are used for training and inspection qualifications the set must meet the strictest requirements for clarity and particle size determination. The containers provided by the customer are requested to be cleaned and depyrogenated as if they were to be used in production. We rewash the containers and stoppers in the preparation process. The containers are examined very carefully to insure that they free of any contamination prior to the seeding operation. We have found that container quality has a considerable influence on the preparation time. An important part of the preparation is to insure that all of the trace elements have been removed from the container interior walls. Each container is sealed with a closure that is laser matched with unique Lot/Serial number that identifies the actual content of the container. The customer is supplied with Certificate of Analysis (COA) that describes the container, its contents and the seed particle material and seed particle size (see sample sheet below).

Each RLPS™ set is seeded with particles that are populated from very small (40-50 µm) to very large (800 - 1100 µm). The largest percentage of particles is concentrated is near the visible limit of human inspectors at 500 foot-candles of illumination for container of a particular size. Small containers (1 ml) shift the center of the particle distribution toward small particle sizes (Level I) and larger containers (500 - 1000 ml) shift the center of the particle distribution to large particle sizes (Level VI). The container material also has an influence on which Level particle standards should be used for seeding. Each individual seed sample is examined for shape and measured precisely to ±1 µm, it is then photographed for inclusion into your records prior to seeding. You are supplied with all documentation and photographs on a CD-ROM included with samples.

Note: The RLPS sets only include stainless steel and borosilicate glass spherical particles. Spherical particles are required so that particle orientation will not influence the perceived size of particle when determining the efficiency of each operator in the human baseline determination study.

Referee Level Particle Standards - Basic Set Includes:

65 vials total (16 seeded, 49 clean)

Stainless Steel Spheres sizes range from 50µm - 800µm

Glass Spheres (transparent) sizes range from 70µm - 500µm

Referee Level Particle Standards - Extended Set Includes:

100 vials total (36 seeded, 64 clean)

Stainless Steel Spheres sizes range from 50µm - 800µm

Glass Spheres (transparent) sizes range from 70µm - 1100µm

Glass Shards (transparent) sizes range from 800µm - 2,500µm

Nylon Fibers (Black) sizes 1, 2, & 3 mm (Other sizes upon request)

LDPE (white irregular) sizes 200 - 300 µm proximal length

Polystyrene (Translucent spherical) sizes 100 - 500 µm diameters

Referee Level Particle Standards - Custom Samples:

The Basic or Extended Sets may be customized with Additional Samples requested by the customer.

Typical additional seeding materials include: gown material, teflon, LDPE, Viton, aluminum shards, cellulose fibers, hair, etc.... The customer may also request that the containers have altered viscosity, color or turbidity. We will attempt to manufacture these samples to closely match examples provided by the customer or of our own design. The cost of the Custom samples is dependent on the seeding material, the composition of the solution and the container size. Please contact the office for additional information.

The RLPS™ sets are provided with photographs of the actual seeds used in the samples. The report includes the actual seed sizes as measured with an NIST traceable translation stage with special high power microscope and image processing system. All containers are laser marked on the aluminum closure (vials) with a indelible 2-D code and equivalent human readable code. All documentation is provided in written form (with exception of the photographs) and on a CDROM or DVD. A example of a Certification of Analysis is shown below along with a CDROM record.

Sample "Certificate of Analysis" supplied with each RLPS™ set.

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