MIB-200 Manual Inspection Booth

The MIB-100 is considered by many as the “Gold” standard of Manual Inspection Booths. This system implements a patented lighting technique that produces a large uniform inspection volume with Top / Bottom lighting. The system offers several method for setting the inspection volume intensity and uniformity, the lamps can be moved toward or away from the centerline of the inspection window or the operator can use the “Master Intensity Control” to increase or decrease the intensity of the lamps.

MIB-200 in Standard Configuration with Stainless Steel Armrest with Optional Fixed Side Shelves and Light Curtain for verification of inspection duration are added.

The MIB-200™ is the upgraded version of the MIB-100™. The MIB-200™ is a floor standing unit and requires about 52″ (1320 mm) x 34″ (860 mm) of floor space.

The Phoenix Imaging Manual Inspection Booth (MIB-200) has been designed to provide an optimum test environment for critical visible particle inspections. Earlier standardization efforts were based on measured light intensity at a specific inspection point under a light source. The exponential variation of light intensity with distance from the light source limited the utility and replicability of such specifications. When manual inspection point variability is considered, a spatial volume in which the light intensity is maintained constant is required for practical inspection applications. A recently patented design achieves such a test environment. The variation of light intensity in a 10 liter volume was reduced to ± 5%, less than ½ the light intensity variation that is manually detectable. When inspections for contaminating particles are conducted within the controlled light intensity volume, data variability due to light intensity variation is eliminated.

The Manual inspection Booth, following the current recommendations of the Illumination Engineering Society, operates with 550 foot-candles (~5900 Lux) in the light intensity stabilized inspection volume. NOTE: This illumination intensity is in the range recommended for critical inspections for long periods. The particular value has been selected to provide separation between sub-visible and visible contaminating particle measurements. This higher intensity also minimizes the effect of the reduction in contrast sensitivity that accompanies the aging process.

The USP and EP standards have been Harmonized and lowered the light intensity range to 2,000 to 3,750 Lux. The MIB-200 (and all of the dual sided lighting systems) utilize an advanced lighting controller with a feed back circuit to maintain a constant light output. The MIB-200 is designed to operate with a light intensity range between 2,000 to 10,000 Lux, depending of the surface finish of the booth the intensity range may be higher or lower. The lower light intensity level of the USP / EP standard will extend the life of the LED lamps because they are operating at less than 40% power.

Inspector fatigue has been shown to adversely affect the accuracy of the inspection for visible contaminating particles by as much as 30%. The Phoenix Imaging MIB-200™ Manual Inspection Booth has been designed so that the sequence of motions required from an inspector during the inspection are smoothly continuous and are adjustable to the body dimensions of the inspector. These adjustments are made tool-free.

The Phoenix Imaging MIB series are provided with a pair of precision power supplies that incorporate active-loop feedback circuits that monitor the output of the lamps. A photo-sensitive device is positioned to accurately measure the luminous flux produced by the lamps.

A precision potentiometer with a dial indicator is used to adjust the output of the lamps to the desired level. The standard configuration system allows the output at the center of the inspection volume to be adjusted between ~2,000 to 10,000 Lux by simply entering the desired Lux value in to the HMI. The system’s digital system will adjust the lighting controller to output the proper light intensity level. Each system is provided with calibrations at the three light plate position settings for the proper output at the center of the inspection volume (±200 Lux).

The lighting system used in the MIB-200™ is a special design that provides optimum illumination over extended periods of time. The LED lighting modules selected for MIB-200™ provide approximately 40,000* hours of life at 75% power in which the intensity remains at an acceptable output level. The standard operating procedure requires that the LED lighting modules be changed when the HMI indicates that the lamp can no longer be regulated (controlled to produce the desired output level). The life of the LED lamps are dependent on the intensity at which that are operated, high intensity will shorten the time at which the system can maintain the stabilized output. The LED Light Modules can be purchased as Plates that are prewired and tested for quick changes during a scheduled shutdown.

The illumination system is designed with a closed-loop active feedback that maintains a constant luminous flux of the LED lamps over their lifetime. The upper and lower lamps are balanced to provide uniform illumination volume in the inspection zone. The control circuitry will provide a signal to the inspector panel when the lamps are no longer able to regulate and maintain the preset illumination intensity.

A new feature set has been added to the MIB-200™ for limiting the time that an inspector can stay on task (inspecting). A “Task Timer” and a “Break Timer” have been added to the system. The “Task Timer” will limit the time that an inspection can perform inspection. The Task Timer can be set between 1 minute to 500 minutes. The value is set in the Options screen and will require the system to be set in the “Program” mode. When the Task Timer has expired the user has the choice to either allow a new inspector to use the booth or to take a mandatory Break Period in which the Pacer functions of the MIB-200™ are disabled. The “Break Timer” duration can be set to a value of 1 to 60 minutes. After expiration of the “Break Timer” the user may continue the inspection process. New features added to the MIB-200™ include choice of GT-12 (3 Color), GT-32R (Full Color) or WHS1-04 (Full Color) displays.

The MIB-200 stabilized inspection volume is approximately 11 liters with the following dimensions, 250mm (H) x 400mm (W) x 120mm (D). The inspector normally does not require the use of the entire volume during the inspection process. The inspectors are trained to target the center point vertically and horizontally at which the movement sequence of the inspection commences. The movement between the Light inspection and Dark inspection location is usually less than 200mm in which the luminous flux will vary less than 5%.

The MIB-200 white background is constructed of white powder coat painted aluminum sheeting free of imperfections pre-cut to a 11″ x 16″ size. The matte black background is a black painted aluminum sheet attached to backing board also pre-cut to 11″ x 16″ size. Both backgrounds are permanently attached to the Backing Board edge to edge with no visible shadow line between them. The 18% Gray Card is 16″ x 22″ in size and is attached to the center of the Backing Board. The PLC software is pre-configured to perform either Light/Dark inspection or Gray Card inspection selectable at the beginning of an inspection session.

Power supply: 115 – 220 VAC (50-60 Hz), (+/-10%), the power supplies are Universal type but the line cord type must be specified at time of order.

Power Consumption: ~300 Watts (standard), ~500 Watts with Hydraulic Leg Lifts.

Operating Humidity: 35-85% RH

Operating Temperature: 0 to 40 °C (32 to 105 °F)

Dimension & Weight: (Main Unit) 34.5″ (876 mm) W x 28″ (712 mm) D x 68.5″ (1740 mm) H, 175 lbs.

Dimension & Weight: (Armrest Unit) 53″ (1346 mm) W x 10.75″ (273 mm) D x 4″ (101 mm) H, 40 lbs.

Options available:–Footswitch (for Pass / Fail inspection register)
– Curved Armrest (Standard, Straight armrest upon request)
– JP (standard lighting can achieve the 10,000 Lux required by JP)
– Audible Alarm (can be disabled in PLC menu),
– Booth Height Extension Kit (sealed hydraulic and electric operation),
– Moveable Foot Rest.
– Digital Option (controls light intensity from Operator Interface)
– Light Curtain Option (insures proper duration in White / Black inspection volumes).