Raytech mini-ATOS Instruction Manual page 50

The measurement view during the test is shown in Figure 38 and then the important parts are
explained.
The warning symbol shows that it is not safe to touch the cables and test clamps
The highlighted cell shows which phase and tap are currently under the test
The output voltage bar shows what is the actual value of output voltage and which
terminals are used to apply the voltage
By tapping the continuous button, the test mode changes from single-measurement to
continuous mode and the test will not stop automatically. The instrument keeps performing
the test on the phase under the test until the user action
The stop button can be used to stop the test. Please note that it takes time to stop the test
10.1.1 Table view modes
When both primary side and non-primary side of transformer windings have tap positions, it is not
easy to show all measurements for all tap combinations in one table. Hence, to show the
measurements easier, there are two table view modes. The first one is the primary table view
mode. In this mode, for each tap position on the non-primary side, there is a measurement table
consisting all primary tap positions. The other view mode is the non-primary table view mode. In
this mode, for each tap position on the primary side, there is a measurement table which includes
all non-primary tap positions.
90297-0.22 Instruction Manual mini-ATOS
Figure 38: Turns Ratio measurement view during the test
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