Fluke FT120, FT140 manual Rotary Field Indication, Measurement Point Illumination

Fluke T100/120/140

Users Manual

Rotary Field Indication

The voltage testers are equipped with a double- pole rotary field indicator.

The safety measures have to be met

The rotary phase indication is always active. The symbols R or L are always displayed. However, the rotary direction can only be deter- mined within a three-phase system. Here, the instrument indicates the voltage between two external conductors.

•Connect the instrument test probe with the supposed phase L2 and the handle test probe with the supposed phase L1.

•Touch Accessible electrode (11).

The voltage and the rotary field direction are displayed.

L2 L3 L2 L3

L1N

L1N

PE

PE

R

L

Rsignifies that the supposed phase L1 is the actual phase L1 and the supposed phase L2 is the actual phase L2

==> right rotary field

Lsignifies that the supposed phase L1 is the actual phase L2 and the supposed phase L2 is the actual phase L1

==> left rotary field.

When re-testing with exchanged test pro- bes the opposite symbol has to be illumi- nated.

Measurement Point Illumination

Voltage testers T100re equipped with a measu- rement point illumination feature. Thus, working under bad lighting conditions (e.g. division switch cabinets) is made easier.

•Press button for measurement point illuminati- on (10) on instrument rear.

10