33
(3) Press the MODE switch(F1) and select L-N to measure Loop(L-N/L-L) or PSC or select
L-PE to measure earth loop impedance or PFC. Display changes automatically as
follows depending on the applied voltages while LOOP(L-N/L-L) or PSC is selected.
100 - 300V
>300V
<100V
L-N/L-L
Ω
<100V
LOOP
A
L-N
L-L
<100V
PSC
L-N
Ω
230V
50.0Hz
LOOP
A
230V
50.0Hz
L-N
PSC
L-L
Ω
400V
50.0Hz
LOOP
A
400V
50.0Hz
L-L
PSC
<100V
100 - 300V
>300V
L-PE
L-N
!
L-PE
L-N
!
L-PE
L-N
!
L-PE
L-N
!
L-PE
L-N
L-PE
L-N
!
!
(4) Pressing the ATT switch (F2) disables ATT mode. Then “ATT OFF” is displayed on the
LCD.
●ATT(Anti Trip Technology) is to measure LOOP resistances without tripping the RCDs
rated at 30mA or more. “ATT ON” is displayed while it is activated.
2. Wiring Check
After the connection, ensure that the symbols for Wiring check on the LCD are in the status
indicated in Fig.29 before pressing the test button.
If the status of the symbols for Wiring check differ from Fig.29 or
symbol is indicated
on the LCD, DO NOT PROCEED AS THERE IS INCORRECT WIRING. The cause of the
fault must be investigated and rectified.
3. Voltage Measurement
When the instrument is first connected to the system, it will display the line-earth voltage
(MODE L-PE) or line-neutral voltage (MODE L-N/L-L) which is updated every 1s. If this
voltage is not normal or as expected, DO NOT PROCEED.
Fig.30
L-N/L-L
L-N
L-L
L-N
L-L
L-N/L-L
