Yokogawa PC-Based MX100 - Manual (Page 32)

2-3
SM MX100-01E
Testing
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2.2.1 Protective Earth Continuity Test
Procedure
1. Wire the instruments as shown below.
Earth continuity
tester
Protective earth
terminal
MX100
(main unit)
Functional
earth terminal
I–
V–
I+ V+
Protective earth terminal
L N G
When using an inlet When using a screw terminal
Center pin Right-most pin
2. Measure the resistance between the protective earth terminal and functional earth
terminal. Use 4 wires for this measurement.
Items to Be Checked
That the resistance value does not exceed 0.1 Ω when tested at 60 Hz, 30 A for 10
seconds.
2.2.2 Insulation Resistance Test
Procedure
Perform a test using a DC 500 V insulation resistance tester and confirm that the
following criteria are met.
Terminals Measured Power Switch Criteria
AC power terminal to functional earth termina l*
(Short between L and N)
ON 20 MΩ or higher
Ethernet input terminal to functional earth terminal
(short all pins) OFF 20 MΩ or higher
* You may use the functional earth terminal as a protective earth terminal.
2.2.3 Withstanding Voltage Test
Procedure
Perform the withstanding voltage test, and confirm that the following criteria are met and
that no abnormalities occur.
Terminals Measured Power Switch Criteria
AC power terminal to functional earth terminal *
(Short between L and N)
ON 1.5 kVAC for 1 minute
Leakage current of 5
mA or less
* You may use the functional earth terminal as a protective earth terminal.
2.2 Tests of the Main Module (MX100)