Kett Electric Laboratory LZ-990 Dual type thickness gauge Escal

• Low-cost, compact sensor-integrated dual coating thickness gauge
• Equipped with automatic substrate detection function
• Measurement range: 0 to 2000 μm
• Data memory for approximately 1000 points, statistical calculation function
•  
• Measurement method: Electromagnetic and eddy current (with automatic discrimination function)
• Measurement target: Non-magnetic coating on magnetic metals, and insulating coating on non-magnetic metals
• Measurement range: 0 to 2000 μm
• Measurement accuracy: Less than 50μm +/-1μm, 50μm to less than 1000μm +/-2% 1000μm to less than 2000μm +/-3%
• Compliant standards: Electromagnetic induction: JIS K5600-1-7, JIS H8501, JIS H0401/ISO 2808, ISO 2064, ISO 1460, ISO 2178, ISO 19840/BS 3900-C5/ASTM B 499, ASTM D 7091-5, ASTM E 376 Eddy Current Method: JIS K5600-1-7, JIS H8680-2, JIS H8501/ISO 2808, ISO 2360, ISO 2064, ISO 19840/BS 3900-C5/ASTM D 7091-5, ASTM E 376
• Resolution: less than 100μm 0.1μm 100μm or more 1μm
• Display method: Digital (backlit LCD, minimum display digit 0.1μm)
• Data memory: Approximately 1000 points
• Application memory: 8 types of electromagnetic and eddy current types, total of 16 calibration curves can be stored
• Power supply: 2 x 1.5V batteries (AAA alkaline)
• Power consumption: 40mW (when backlight is off)
• Operating temperature range: 0 to 40°C
• Functions: Calibration curve memory (application memory), measurement data memory, data deletion, data output, lot classification, automatic power ON/OFF, function, clock function, upper and lower limit settings, statistical calculation, backlight function, unit setting, etc. 15 types of functions
• External output: Can be output to a PC (USB) or printer (RS-232C)
• Dimensions and weight: 82 (W) x 99.5 (D) x 32 (H) mm, approx. 160 g
• Accessories: Zero plate holder (iron base, aluminum base), standard plate (50μm, 100μm, 1000μm, approximate values, 1 each), carrying pouch, 1.5V batteries (AAA alkaline) x 2, wrist strap
• Options: Standard plate (thickness other than that included), Measuring stand LW-990, Printer (VZ-330 or VZ-380), Printer cable, USB computer cable, Transparent protective cover, Data management software: "Data logger LDL-01".

Frequently Asked Questions (FAQ):

1/ Can the LZ-990 measure on curved surfaces?

Yes, stable readings are possible on convex or concave surfaces with radii ≥ 10mm, provided the probe maintains full contact.

2/ How do I switch between µm and mil units?

Navigate to Unit Setting in the main menu and select either µm or mils. The change takes effect immediately.

3/ What causes large measurement deviations?

Deviations often stem from uncalibrated zero reference, dirty probe tip, or weak battery. Re-zero, clean the probe, and replace batteries as needed.

4/ How many calibration curves can I store?

The LZ-990 holds 16 calibration curves total: 8 for electromagnetic induction and 8 for eddy-current.

5/ Is manual substrate selection required?

No. The gauge auto-detects the substrate and switches measurement methods automatically.

6/ How do I print results on site?

Attach the optional VZ-380 printer via RS-232C; select Print from the data output menu to generate instant hardcopies.

7/ What standard coatings can it measure?

Paints, plating, anodic oxide, lacquers, resins, plastics, and other non-magnetic/insulating coatings on metallic substrates.

8/ What software is available for data logging?

The LDL-01 Data Logger Software enables CSV exports and trend analysis when connected via USB.

9/ Operation Guidelines

- Ensure the test surface is clean, dry, and free of oil or debris.

- Hold the probe perpendicular and apply gentle, consistent pressure.

- Read the thickness value on the backlit LCD; choose µm or mils via the Unit Setting menu.

- For uneven coatings, take multiple measurements and calculate the average for accurate assessment.

- Rely on the gauge’s auto-zero feature periodically to maintain precision.

10/ Maintenance & Care

- Wipe the probe tip and housing with a soft, dry cloth after use.

- Replace AAA batteries promptly when low-battery indication appears to prevent measurement drift.

- Store the gauge and accessories in the protective pouch to avoid impacts or moisture exposure.

- Schedule recalibration every 3 - 6 months or after 5000 measurements, whichever comes first, to comply with quality standards.