The 8400K Digital Optical Micrometer is a unique coating and surface inspection tool that offers speed, precision, and repeatability. Scratch depth measurement used to be an art. With the 8400K, you can now do it in less than 20 seconds. This time-saving tool was designed specifically for measuring the width of scratches and vertical depth of surface features. "Visual inspection" is standard for any component with scratch or corrosion pit damage, and maximum allowances are often specified. Other methods of visual inspection are time consuming and inconclusive.

The 8400K lets you measure the width of scratches using the reticle eyepiece and vertical depth of surface features, usually to evaluate the severity of mechanical damage such as scratches, corrosion, pits or blemishes difficult to observe by other methods. Accurate measurement is essential to determine whether a part should be kept in service, and the 8400K brings remarkable precision and integrity to this judgment process.

The 8400K is designed for use in the field. The sealed, non-magnetic case is dustproof and shock-resistant to withstand everyday shop use.

• Measure scratches with accuracy and repeatability. Depth allowances are often specified, but proper measurement is needed to determine if a part should be kept in service. The 8400K performs this task quickly and easily, where other methods are time consuming and inconclusive.

  
      

• Measurement Technique: First, focus on a smooth surface next to a scratch. Then, zero out the digital display (you can choose a readout in either inches or millimeters). Next, focus on the bottom of the scratch. The digital display shows depth relative to the surface. "Floating Zero" means that no arithmetic is necessary to arrive at the result. If you can focus, you can perform cost-saving, accurate measurements of surface damage to mechanical parts.
      
• Applications:  Coated surfaces, windshields and other transparent materials may be measured for overall thickness, depth of crazing, and depth and width of imbedded bubbles or seeds as well as scratches. Shafts, couplings, airframes, masts, castings, windshields, fuselage skin (pitot tube area), leading edges, paint, turbine blades, fuel pump gears, props, rotor blades, sealing surfaces and much more.
    
• Options: The 8400K can output to a printer with Statistical Process Control (SPC), or be linked to a PC. These options provide hard copy for documentation, traceability, and trend monitoring.

Accuracy &
Resolution

In inches:
The digital readout shows four places right of the decimal: "0.0000"
The far right (ten-thousandths) reads "0" or "5" (0.0000 or 0.0005)
Accuracy: 0.001"
Resolution: 0.0005"

In millimeters:
The readout shows "0.00". The far right (hundredth of mm) place reads in 0.01 mm increments.
Accuracy: 0.01 mm
Resolution: 0.01 mm

Depth & Width
of View

With 10X eyepiece:
Vertical range (or depth): 0.250" (6.4 mm) from surface to bottom of scratch.
A width of 0.040" (1.0 mm) can be measured with reticle eyepiece.

With 4X eyepiece:
Vertical range (or depth): 1.250" (32 mm)
A width of approximately 0.150" can be viewed (but not measured).

Dimensions

Hardwood case: 16" x 7" x 5"
Micrometer only: 2" dia. x 9" height (3" dia. at base)

Reticle
Eyepiece

Accuracy: ±0.001" (±0.02 mm)
Resolution: ±0.001" (±0.02 mm)
Width: 0.040" (1.0 mm)
Measured surface must be perpendicular to micrometer.
Use only 10X objective lens with reticle eyepiece.

Dimensions
& Weight

Micrometer with base: 3" dia x 9" height, 1.5 lbs
Kit in case: 13" x 11" x 6" (L x W x H), 7 lbs

Options

The 8400K Micrometer can download data to a small printer or to your PC. These capabilities are important for keeping documentation and traceability procedures, and for monitoring trends.

DP-1HS Digimatic Mini-Processor & Printer

This is the most popular 8400K option. A one-meter cable connects the 8400K to this instrument, which is capable of printing, storing and processing measurement data. Tolerance judgments, statistical results and histograms may be printed. When limits are set, up/down arrows appear for exceeded limits. There are several types of printouts to choose from. Readings can either be printed in the order they are taken, or plotted according to their magnitude in a number of statistical chart formats. Weight: 1.1 lbs. Dimensions: 7.1" X 6.3" X 3.2"

Input Tool for Personal Computers

Two cables allow data to be sent to a spreadsheet program such as Excel. Measurements are entered with just one touch of a data button. No battery or AC power is needed, and laptops can be used. The cables have small interface boxes in the middle. One cable connects via the keyboard input port (keyboard is disabled), the other through the RS-232 port.

• Dimensions (both styles):
• Cable Length: 40"
• Total Weight: 87g
• Center Box: 2.4" X 1.5" X .9"
• RS-232 Cable : P/N 264-005
• Keyboard Cable: P/N 264-007