UT593/595 OPERATING MANUAL UT593/595 OPERATING MANUAL
V.ROTARY SWITCH
1. Phase-sequence measurement;
2. Voltage/frequency measurement;
3. 250V insulation resistance measurement;
4. 500V insulation resistance measurement;
5. 1000V insulation resistance measurement;
6. Measurement of maximum 200mA grounding continuity
7. Shutdown
8. Measurement of loop circuit/expected fault current/line circuit impedance/expected
short-circuit current;
9. Automatic RCD measurement;
10. RCD tripping time 50% action current measurement;
11. RCD tripping time 100% action current measurement;
12. RCD tripping time 200% action current measurement (only for UT595);
13. RCD tripping time 500% action current measurement;
14. RCD tripping action trigger current measurement;
VI. PREPARATION BEFORE MEASUREMENT
When you start the instrument and the battery mark on the upper-right corner of the LCD display
indicates low voltage, it indicates the battery is almost used up and needed to be replaced.
Low voltage symbol Battery voltage
7V or below
VII. GROUNDING CONTINUITY MEASUREMENT
(SEE FIG. 3 FOR CONNECTION DIAGRAM)
Wiring method:
(1) Before measuring insulation resistance, the circuit to be tested must be totally discharged and
must be completely isolated from the power circuit.
(2) Insert the red test line or special pen with TEST key into the Red input port, black test line
into the Black input port.
(3) Connect red and black alligator clips or pen test probe to the circuit to be tested.
Correctly connect the object to be test to the instrument according to the connection diagram;
then make the rotary switch point to the Ù; press the TEST key to start grounding continuity
measurement.
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