UNI-T UT593 - Measurement of Line Circuit Impedance;Expected Short-Circuit Current

UT593/595 OPERATING MANUAL UT593/595 OPERATING MANUAL
Selection and operation of function keys F1-F4 is shown below:
F1 F2
F3
F4
Buzzer and backlight
Not used
Not usedNot used
Instructions on key operation: Press and hold F1 for about 2 seconds to open and close the
backlight; no function is available for other F2, F3, F4 and TEST.
1. You must ensure normal supply of power frequency civil 220V in the power socket; in case of
abnormal power supply or no power, L-PE and L-N symbols at the lower-left corner of LCD blink
at the same time.
2. You must ensure that earth end of the power socket is soundly earthed; in case of poor
grounding or no grounding of the power socket, L-PE and N-PE symbols at the lower-left corner
of LCD blink at the same time.
3. You must ensure that neutral wire end of the power socket is reliably connected; in case poor
connection or no connection of the neutral wire end of the power socket, L-N and N-PE symbols
at the lower-left corner of LCD blink at the same time.
4. In measuring loop circuit impedance\fault expected short-circuit current, ensure that live wire
phase and neutral wire phase are not reversed for the power socket; otherwise, L-PE, L-N and
N-PE symbols at the lower-left corner of LCD blinks at the same time.
5. This kind of measurement is conducted under high-voltage state; much attention shall be given
to personal safety.
Notice:
XII. MEASUREMENT OF LINE CIRCUIT IMPEDANCE/EXPECTED
SHORT-CIRCUIT CURRENT (SEE FIG. 7, FIG. 8 AND FIG. G FOR
CONNECTION DIAGRAMS)
Make the rotary switch point to NO TRIP item in LOOP, according to Fig. 7, 8 and 9, insert
special red, green and black lines with power plugs and test probes into the red, green and black
input ends on the side of the instrument; connect plugs or test probes into power frequency civil
220V socket or circuit; press TEST key to start measurement of line circuit impedance\expected
short-circuit current.
Selection and operation of function keys F1-F4 is shown below:
F1 F2
F3
F4
Not used
Not usedNot used
Backlight/L-N/L-PE
Instructions on key operation:
Press and hold F1 for about 2 seconds to open and close the backlight;
Press and release F1 for switching between L-N\L-PE measuring functions;
No function is available for other F2, F3, F4 and TEST.
Notice:
1. You must ensure normal supply of power frequency civil 220V in the power socket; in case of
abnormal power supply or no power, L-PE and L-N symbols at the lower-left corner of LCD blink
at the same time.
2. You must ensure that earth end of the power socket is soundly earthed; in case of poor grounding
or no grounding of the power socket, L-PE and N-PE symbols at the lower-left corner of LCD blink
at the same time.