Opal DT-9121, Operating Instructions Manual

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5. Rotary Field Indication
The voltage testers are equipped with a double-pole rotary field
indicator.
The safety measures as mentioned in paragraph 2.0 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
determined 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.
The voltage and the rotary field direction are displayed.
R signifies that the supposed phase L1 is the actual phase L1 and
the supposed phase L2 is the actual phase L2.
L signifies that the supposed phase L1 is the actual phase L2 and
the supposed phase L2 is the actual phase L1.
When re-testing with exchanged test probes the opposite symbol
has to be illuminated.
6. Measurement Point Illumination
Voltage testers are equipped with a measurement point illumination
feature. Thus, working under bad lighting conditions (e.g. division
switch cabinets) is made easier. Press button for measurement point
illumination (11) on instrument.
7. Maintenance
When using voltage testers in compliance with the instruction
manual, no particular maintenance is required. If functional errors
occur during normal operating, our service department will check
your instrument without delay.