4 test procedures, Insulation resistance, Protective grounding – Yokogawa Removable Chassis DX1000N User Manual
Page 18: 4 test procedures -4, Insulation resistance -4 protective grounding -4, Test procedures
3-4
SM 04L41B01-01E
3.4 Test Procedures
Insulation Resistance
● Test Procedures
Perform a measurement with an insulation resistance meter and check whether the
results satisfy the reference values. Perform the measurement with the power switch
turned ON.
Reference Value
Terminals Measured
Reference Value
Condition
Between the power and protective ground
terminal
100 MΩ or more
Short the L and N terminals.
Between the input and protective ground
terminal
100 MΩ or more
Short all input terminals.
Between the Ethernet and protective
ground terminal
100 MΩ or more
Short all pins of the Ethernet
terminal.
Between RS-422/485 SG and
RS-422/485 FG terminals
100 MΩ or more
With the /C3 option.
Protective Grounding
● Test Procedures
Perform a resistance measurement with a DMM (digital multimeter), and check
whether the results satisfy the reference values.
Reference Value
Measured Location
Reference Value
Between the protective ground terminal
and bezel attachment screw (left side)
0.2 Ω or less
USB
CF CARD
NO.
Do not remove the cover.
Repair by trained personnel only.
Protective ground terminal
DX1000/DX1000N
Bezel attachment screw (left side)
DX2000
POWER
CF CARD
USB
Bezel attachment screw (left side)
Protective ground terminal