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Appx.
2
Contact Check Function
Appx. 2 Contact Check Function
Route 3
Output terminal
LOW side
Route 2
LOW side
Protective
resistance
High voltage
power supply
(Output voltage)
Contact check terminals
HIGH side
Output terminal
HIGH side
Equipment to
be measured
Protective resistance
Partial
resistance
Partial
resistance
Detection
resistance
Detection
resistance
Detection
resistance
Internal power
supply DCV
V1
V2
V3
A
(Figure: Contact check)
Route 1
A contact check is performed independently for the output terminal HIGH side and
LOW side. The principle of a contact check is shown below.
Principle
HIGH side contact check:
Using output voltage monitor V1 and contact check voltage monitor V2, the voltage of the
measurement terminal is measured and whether the output voltage is reliably applied to the
terminal is checked. (Route 1)
LOW side contact check:
Internal power supply (DCV) for a contact check on the LOW side and current (voltage) detector
V3 are provided. A contact check is performed by V3 that detects the current from DCV flowing
the electrode of the equipment to be measured. (Route 2)
As resistance is normally detected by Route 3, DCV for a contact check on the LOW side does
not affect resistance measurements.
Summary of Contents for ST5520
Page 2: ......
Page 8: ...vi Contents ...
Page 22: ...14 Usage Notes ...
Page 56: ...48 Announcing the Judgment Results Using a Beep Sound ...
Page 82: ...74 Initializing the System Reset ...
Page 88: ...80 Deleting the Panel Data ...
Page 158: ...150 Command Reference ...
Page 193: ...Appx 13 Rack Mounting Screw location dimensional drawing 10 9 8 7 6 5 4 3 2 1 Appx Ind ...
Page 194: ...Appx 14 Dimensional Diagram Appx 8 Dimensional Diagram 166 2 215 1 14 1 80 1 ...
Page 197: ...13 09 ...
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