Figure 5-16 INSULATION MODE: display readouts from above example. Wayne Kerr 3260B

Advanced Operation 5–17

Figure 5-16 INSULATION MODE: display readouts from above example

5.8.5 INSULATION MODE Parameters

The following INSULATION MODE parameters are selectable with the soft keys to the right of the display. Parameters which are common to both INSULATION MODE and

IMPEDANCE MODE are described in section 4.7.2—IMPEDANCE MODE Parameters.

µA MΩ

Pri–Sec

Pri–GND

Sec–GND

Selects the measurement unit to display, either µA or MΩ. See also Range, below.

Sets the analyzer to measure leakage current between the transformer primary and secondary windings. Depending on whether the analyzer is set to 2- or 4-terminal measurement, the active connections, shown by the LEDs above the BNC connectors, are either the RED or BROWN BNC connectors respectively. For measurements in this mode, the active Primary

BNC is connected to one end of the transformer primary winding and the active Secondary BNC is connected to one end of the transformer secondary winding.

Sets the analyzer to measure leakage current between the transformer primary winding and its grounded metal case or screen. Depending on whether the analyzer is set to 2- or 4terminal measurement, the active connections, shown by the LEDs above the BNC connectors, are the RED or BROWN Primary

BNC connector and the ground lead, which is the green clip lead when using Wayne Kerr Kelvin clip leads. For measurements in this mode, the active Primary BNC is connected to one end of the transformer primary winding and the ground lead is connected to the transformer metal case or screen.

Sets the analyzer to measure leakage current between the transformer secondary winding and its grounded metal case or screen. Depending on whether the analyzer is set to 2- or 4terminal measurement, the active connections, shown by the LEDs above the BNC connectors, are the RED or BROWN Secondary

BNC connector and the ground lead, which is the green clip lead when using Wayne Kerr Kelvin clip leads. For measurements in

5–18

Advanced Operation

TRANSFORMER

this mode, the active Secondary BNC is connected to one end of the transformer secondary winding and the ground lead is connected to the transformer metal case or screen.

Enters TRANSFORMER MODE see section 5.7

The following INSULATION MODE parameters are those displayed in the bottom left-handcorner of the screen, shown in Figure 5-16. They are only visible when Hide Setup is NOT

SELECTED.

Level

Range

The DC voltage level used for the insulation test. This parameter is selected with the and navigation keys and is altered with the

and navigation keys or with the data entry keypad. Levels of 100V, 200V or 500V are available.

Enables manual or auto range to be set. The parameter is highlighted with the or navigation key and toggled between manual and auto range with the or navigation key. When manual ranging is selected, the range is set with the data entry keypad. Because of the low levels of current measured in

INSULATION MODE only ranges 1 and 2 are valid. Entering a higher range will result in Figure 4-14, above, being displayed and the nearest available range being set. When the analyzer is set to display units of MΩ, even though high ohmic values would be expected, manual ranges are still limited to 1 or 2 because the analyzer actually measures the leakage current and converts it to ohms before displaying the result.

5.9 BINNING MODE (Optional)

BINNING MODE allows components to be sorted into bins according to their measured value and/or minor term. Bins 0 to 8 contain the sorted components and bin 9 the rejects. Binning is normally done in Single shot mode or under GPIB control. Using Repetitive mode will disable the Count facility, but can be used if this is not required. The measurement conditions and test parameters are independent of other modes when the instrument is set to non-global test conditions (see section 5.18—The SETTINGS Page).

BINNING MODE is divided into three sections: Set, Sort and Count.

5.9.1 BINNING MODE – Set

When BINNING is selected from the MAIN MENU the analyzer will display the last binning mode used. If BINNING MODE – Set is not displayed at the top of the screen, press the BIN

SET soft key to select it. Figure 5-17 shows the BINNING MODE – Set main screen set to measure turns ratio against a nominal of 1 with a drive level of 1V AC and a frequency of

10kHz.