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
Содержание FX-7302
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Страница 60: ...Chapter 2 2 40 ...
Страница 62: ......
Страница 86: ...Chapter 4 4 18 ...
Страница 87: ...4 19 MAIN BOARD circuit diagram PCB 6956B Power connection table No 1 ...
Страница 111: ...4 43 MARK SENSOR BOARD PCB 6942 MARK SENSOR block Recoding paper 1 2 3 J1 DF4 3P 2C 5 3 4 2 1 PH1 ON2253R ...
Страница 112: ...4 44 MAGAZINE UP SENSOR BOARD PCB 6943A MAGAZINE UP SENSOR BOARD block 1 2 J1 DF4 2P 2C 1 2 3 S1 JPS1220 0401 ...
Страница 114: ...4 46 ...
Страница 116: ......
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Страница 131: ...6 1 MAIN BOARD PCB 6956B component side ...
Страница 132: ...6 2 MAIN BOARD PCB 6956B soldering side ...
Страница 133: ...6 3 OPERATION BOARD PCB 6957B component side ...
Страница 134: ...6 4 OPERATION BOARD PCB 6957B soldering side ...
Страница 135: ...6 5 ECG AMP BOARD PCB 6731D component side ...
Страница 136: ...6 6 ECG AMP BOARD PCB 6731D soldering side ...
Страница 137: ...6 7 MARK SENSER BOARD PCB 6942 component side ...
Страница 138: ...6 8 MAGAZIN UP BOARD PCB 6943A component side ...
Страница 139: ...6 9 CONNECTION BOARD PCB 7028 component side ...
Страница 140: ...6 10 ...
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Страница 151: ...7 9 Outline view 255 315 70 76 ...
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Страница 160: ...Chapter 8 8 6 ...
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Страница 162: ...39 4 Hongo 3 chome Bunkyo ku Tokyo Japan Phone 81 3 3815 2121 Fax 81 3 3814 1222 4R2149A 200506 F ...