Delta 4000 Instruction Manual download pdf (Page 34)

81331 Rev 01 Nov 2010

Operation

Test Mode

Delta 4000 offers a quick setting for available test modes.

The top line (UST-R in this case) defines and describes the selected test mode.

The second and third lines explain how the instrument is configured for the

measurement. They have a different designation depending on if UST

(Ungrounded Specimen Test) or GST (Grounded Specimen Test) measurements

are conducted.

UST mode

Ground and Guard are internally connected. Red and Blue terminals are either

internally connected to be measured or internally connected to Ground (and

Guard). In UST mode, the center line refers to the terminal or terminals that are

measured and the lower line refers to the terminal that is internally connected to

Ground and therefore excluded from the measurement.

GST mode

The current returning from Ground is measured. The Red and Blue terminals are

either connected to Ground to be included in measurement or Guard to be

excluded from the measurement.

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Delta 4000 Instruction Manual Page 34