TOS3200
81
Creating Sequence Programs
6
Program Test
Table 6-1 Selectable range of LOWER/UPPER
Earthing check
If the PROBE item is set to ENCLIV or ENCNEU, measurement terminal A is connected to
the EUT enclosure (floating section) and terminal B of the measurement network (NTWK) is
connected to the power line (L or N) inside the TOS3200 to execute the test. Therefore, if the
EUT enclosure is grounded, a dangerous earth fault will result through the NTWK. It is also
possible that measurement terminal A be connected to the grounded section of the enclosure
by mistake. It is necessary to check that the measurement points is not grounded in advance
to perform the test safely.
The earthing check automatically makes this check. When you press the START switch, the
TOS3200 supplies a low current between measurement terminals A and earth before the
actual test, measures this current, and checks the grounding of the measurement point. If the
measurement point is grounded, “↕FAIL” (CONTACT FAIL) will be indicated on the screen,
and the test will be aborted.
p. 96
Both the U-FAIL and L-FAIL signals are delivered from the SIGNAL I/O connector.
To clear CONTACT FAIL, press the STOP switch.
Blinking UP <= LOW indication
If the lower reference is set to a value greater than or equal to the upper reference in the
LOWER ON condition, “UP <= LOW” will appear at the upper right of the screen to indicate
that the setting is invalid.
Item Description Panel operation
9 WAIT Sets the test wait time. F4 key
Test wait
time
Set the test wait time in the range of 1 s to 999 s.
You will not be able to enter the value if set to OFF.
Rotary knob
ON/OFF The item is turned on when the value is displayed. SHIFT+F4 key
10 TIMER
Sets the test time.
F5 キー
Test time
Set the test time in the range of 1 s to 999 s.
You will not be able to enter the value if set to OFF.
Rotary knob
ON/OFF The item is turned on when the value is displayed. SHIFT+F5 key
*1. You will not be able to select this item if you select PCC for item 2 (operation mode).
*2. You will not be able select this item if E
NCLIV or ENCNEU is selected for item 3 (PROBE). Item 4 (POL) and 5
(COND) are set to P
NRM and NORM, respectively, regardless of the present setting.
MODE PCC NTWK A, B,B1, C NTWK D, E NTWK F NTWK G
DC, RMS 30 μA to 30.0 mA 30 μA to 30.0 mA 30 μA to 20.0 mA 30 μA to 15.0 mA
PEAK 50 μA to 90.0 mA 50 μA to 45.0 mA 50 μA to 30.0 mA 50 μA to 22.5 mA
SeeSee
CAUTION
If you connect the test lead to the measurement point after you press the START switch, the
TOS3200 will judge that the measurement point is not grounded, and the earthing check will
pass. If you do this, you will not be able to check mistakes in the connection. Be sure to con-
nect the test lead to the measurement point first, and then press the START switch.
If you set LINE BRK (AUTO) to OFF and PROBE to EncLiv or EncNeu, the TOS3200 does
not perform earthing checks. See p. 88 for details.
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