Maintenance
2 - 33
Checking the protective earth resistance
Measurement wiring diagram
Resistance
measuring
device
Measurement point A
(Only earth wire)
Measurement point B
(Potential equalization terminal)
Power supply cord (female)
Several cm
FX-7302
If no jig is equipped for the female power supply cord like the above, measure it at the
protective earth terminal inside the AC inlet of electrocardiography directly.
Protective earth terminal
Potential equalization terminal
Power outlet
Resistance
measuring
device
Conversion plug
Measurement point A
(Ground plug)
Measurement point B
(Potential equalization terminal)
Power supply cord
FX-7302
Power supply cord protective earth terminal
Potential equalization terminal
Protective earth resistance measurement points
Measurement Conditions
Without power supply cord
With power supply cord
Measurement point A
Protective earth terminal
Protective earth terminal for
power supply cord
Measurement point B
Potential equalization
terminal
Potential equalization
terminal
Protective earth resistance measurement conditions
Measure the resistance between the potential equalization terminal (and/or
other accessible conductive parts) and the protective earth terminal, or the
protective earth terminal (ground plug) while the AC power supply cord is
connected.
Acceptance standards
Between protective earth terminal and potential equalization
terminal
0.1
Ω
or less
Between power supply cord protective earth terminal and potential
equalization terminal
0.2
Ω
or less
·
With power supply cord
·
Without power supply cord
Summary of Contents for FX-7302
Page 10: ...viii ...
Page 12: ......
Page 60: ...Chapter 2 2 40 ...
Page 62: ......
Page 86: ...Chapter 4 4 18 ...
Page 87: ...4 19 MAIN BOARD circuit diagram PCB 6956B Power connection table No 1 ...
Page 114: ...4 46 ...
Page 116: ......
Page 130: ......
Page 131: ...6 1 MAIN BOARD PCB 6956B component side ...
Page 132: ...6 2 MAIN BOARD PCB 6956B soldering side ...
Page 133: ...6 3 OPERATION BOARD PCB 6957B component side ...
Page 134: ...6 4 OPERATION BOARD PCB 6957B soldering side ...
Page 135: ...6 5 ECG AMP BOARD PCB 6731D component side ...
Page 136: ...6 6 ECG AMP BOARD PCB 6731D soldering side ...
Page 137: ...6 7 MARK SENSER BOARD PCB 6942 component side ...
Page 138: ...6 8 MAGAZIN UP BOARD PCB 6943A component side ...
Page 139: ...6 9 CONNECTION BOARD PCB 7028 component side ...
Page 140: ...6 10 ...
Page 142: ......
Page 151: ...7 9 Outline view 255 315 70 76 ...
Page 152: ...7 10 ...
Page 154: ......
Page 160: ...Chapter 8 8 6 ...
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