APPLICATION

Optimized for testing insulating oils with a specific gravity of 0.875, the Megger KF875 simply requires the operator to press one button and inject a 1ml sample into the test cell. The simple ‘one touch’ operation makes the KF875 so easy to use that it requires no specialist knowledge or training to use it effectively. Results are presented on the instrument display and on the integral printer in both micrograms of water and in milligrams per kilogram (parts per million, ppm).

The KF-UNI allows the titration of samples with a range of specific gravities from 0.60 to 1.40 and also permits the use of different sample sizes. The printer may be disabled if not required and results can be calculated in ppm, mg/kg, % and micrograms. For extra flexibility, the results may be calculated based on the weight of the sample or based on the volume and specific gravity of the sample.

The KF-LAB analyzes materials with an SG between 0.6 and 1.4, but also has a default setting optimized for analyzing insulating oils with an SG of 0.875. This means it can be used to measure water content in a variety of different materials but is also easy to set up for transformer insulating oils.

FEATURES AND BENEFITS

• The KF875 and KF-UNI are highly portable and designed specifically for outdoor use - both units are supplied as standard with a printer, low drift cell and rugged carry case. Portability is further enhanced with flexible power options - both units can be powered from the mains supply, from the internal rechargeable battery or via a 12V car adapter.

• Each unit eliminates inaccuracies with ACE Control System - some Coulometric Karl Fischer sets are susceptible to inaccuracies due to changes in electrolysis cell resistance, which requires frequent checking of the titrator efficiency by analyzing known water content standards. The KF875, KF-UNI and the KF-LAB remove this need by using the patent pending ACE (Automatically Compensated Errors) Control System. This guarantees that the electrolysis current produced and the count rate displayed are always correctly synchronized, regardless of changes to the electrolysis cell resistance thus eliminating the need to calibrate the reagent. This further adds to the instruments’ remarkable userfriendliness and ease of use.

• Each unit uses Karl Fischer coulometric titrimetry the industry standard method for determining moisture content (ASTM D1533, BS EN 60814:1998, IEC 60814:1997).

• The KF875 and the KF-UNI include a rechargeable battery power - allows accurate on-site measurements to be made on oil samples freshly obtained, eliminating any time deterioration of the oil sample.

• The KF875 and the KF-UNI may be powered by internal rechargeable batteries or from the supply allows field-testing and laboratory testing with the same equipment, providing standardization.