Delta 4000 Instruction Manual download pdf (Page 57)

Delta 4310 User Interface

81331 Rev 01 Nov 2010

Intelligent Temperature Correction, ITC

As a unique feature Delta4000 also offers ITC, Intelligent Temperature

Correction. With ITC the actual temperature correction for a certain

measurement object is estimated by measuring an additional frequency sweep

after performing the standard single frequency measurement. The information

from the sweep test is then used to estimate the correct temperature correction

from measurement temperature to 20°C reference (patent pending).

Note: Temperature range for ITC is 5-50° measurement/insulation

temperature. The frequency range for performing ITC should be 2-500

Hz. Selecting a higher low frequency will limit the temperature range.

Voltage Dependence Detection

Another unique feature in Delta 4000 is automatic Voltage Dependence

Detection (patent pending). In every test, Delta4000 measures the harmonic

content of the signal and based on this information it calculates a Voltage

Dependence Factor, VDF. If this value is too high (default > 0.05) the number

turns red, indicating a voltage dependence of the test object i.e. the dissipation

factor is pending the test voltage. In this situation a tip-up (step voltage) test

should be performed to verify and quantify the voltage dependence.

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Delta 4000 Instruction Manual Page 57