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When the
EARTH RES
-
OHMS
FUNCTION SWITCH
indicates PE (Protective Earth), and the null offset value is equal to the last null offset
value.
Action
1. Position the
2. Connect the DUT power cord to the test receptacle on the ESA601
3. Connect the banana plug end of the red test lead into the RED signal jack and the
probe end into to the GREEN signal jack that is labeled
4. Depress and hold down the
5. After the meter settles, release the switch. If the operation is successful, a null offset
is saved, and the ESA601 display indicates a string of zeroes. (If the meter will not
zero, the ESA601 display indicates OL when the switch is released, meaning that the
lead resistance is too high.)
6. Disconnect the lead's probe end from the
enclosure at desired points. Connect the DUT power cord to the test receptacle on the
ESA601.
7. Depress and hold down the
until a stable reading is obtained (approximately three seconds).
8. Release the switch to hold and display the reading.
9. Press the
PRINT SWITCH
10. Repeat steps 6 through 9 as many times as necessary, using the RED test lead to
connect to all exposed conductive parts of the DUT.
When the EARTH RES Ω (GROUND WIRE RES Ω) function is exited, the
NULL value (OFFSET/ZERO) is held. To ensure accuracy of readings, it is
recommended that the nulling of the test lead resistance be performed
periodically, whenever a test lead is disconnected and reconnected, when
results are questionable, or when a new test lead is applied.
Ω (
GROUND WIRE RES
is set to the default (OFF) position, the ESA601 display
-
FUNCTION
SELECTION KNOB
-
OHMS
FUNCTION SWITCH
-
OHMS
FUNCTION SWITCH
to print the reading.
Note
Performing Electrical-Safety Tests
Ω) function is selected initially, and the
to
Ω (
EARTH RES
GROUND WIRE RES
PE TEST POINT
in the
OFFSET
-
, and connect to the DUT
PE
TEST POINT
in the
MEASURE
Local Control
Ω).
.*
/
0 position.
ZERO
Ω position
5
5-11
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