K25330 Copper Strip Tarnish Test Apparatus
Test Method
Measures the tendency of lubricating grease to corrode copper under static conditions. A polished copper strip is immersed in a sample of grease at elevated temperature for a specified period. The strip is examined for corrosion and a classification number from 1-4 is assigned based on a comparison with the ASTM Copper Strip Corrosion Standards.

Features and Benefits
• Conforms to ASTM D4048 specifications

Click on the image to view a larger photo of the instrument.
K25330 Copper Strip Tarnish Test Apparatus
Constant temperature bath immerses 16 test tubes for copper strip tarnish tests of products not requiring a test bomb. Microprocessor temperature controller has °C/°F switchable digital setpoint and display. Operator and equipment are protected by an overtemperature control circuit which automatically interrupts power to the unit should bath temperature exceed a programmed cut-off point. Communications software (RS232, etc.), ramp-to-set and other enhanced features are available as extra cost options. Contact your Koehler representative for information. Welded stainless steel double-wall construction with built-in support rack. Fully insulated.

Specifications
Conforms to the specifications of: ASTM D4048, FTM 791-5309

Capacity: 16 test tubes

Maximum Temperature: 190°C (374°F)

Temperature Control Stability: ±1°C (±2°F)

Bath Medium: 5 gal (18.9L) water or high temperature heater transfer fluid

Electrical Requirements
115V 50/60Hz, Single Phase, 7.5A
220-240V 50/60Hz, Single Phase, 4A

Dimensions Ixwxh,in.(cm)
15.5x12.5x14 (39x32x36)
Net Weight: 27 Ibs (12.2kg)

Shipping Information
Shipping Weight: 45 Ibs (20.4kg)
Dimensions: 7.8 Cu. ft.
Ordering Information
Catalog
Number		 Product Description Electrical Requirements
K25330 Copper Strip Corrosion Test Tube Bath
115V 50/60Hz
K25339 Copper Strip Corrosion Test Tube Bath
220-240V 50/60Hz
Accessories
Catalog  Number Product Description
K25308 Test Jar Rack
Inserts in K25330/K25339 baths to hold sixteen 332-004-001 Test Jars
332-004-001 Test Jar for ASTM D4048
K25080 Copper Test Strip
Conforming to ASTM specifications
380-150-001 Silicone Carbide Paper, 150 grit
For polishing of test strips. Pack of 50 sheets.
380-240-001 Silicone Carbide Paper, 240 Grit
For polishing of test strips. Pack of 50 sheets.
380-150-000 Silicone Carbide Grain, 150 Grit
For final polishing of test strips. 1 lb package.
K25000 Polishing Vise
Holds copper strip firmly in place without marring the edges. Stainless steel, mounted on a composition base.
K25100 ASTM Copper Corrosion Standards
Colored reproductions of tarnished strips encased in plastic.
332-004-002 Viewing Test Tube
Protects copper strip during inspection or storage.
250-000-130F ASTM 130F Thermometer
Range: 20 to 220°F
250-000-130C ASTM 130C Thermometer
Range: –7 to +105°C
When inquiring about NIST traceable certified thermometers, please refer to the catalog number for the corresponding thermometer and replace the middle three zeros in the catalog number with 004. Example: 251-000-01C ASTM 1C Thermometer would be 251-004-01C ASTM 1C Certified Thermometer.
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