Hioki DM7275 Series - Page 193

Appx.13
Measuring Multiple Targets
Takingstepstopreventshort-circuits
Exercise caution concerning the following so as to avoid shorting the measurement target:
(1) Design the switching device so that all contacts are off when it is turned on and off.
(2) Allowanintervaloftimewhenallcontactsareoffwhenswitchingcontacts(“breakbefore
make”).
(3) Insert a fuse into the measurement line.
Avoid use of fuses with a rating of 1 A or less and resettable fuses as they have a large thermal
electromotive force.
RY1
RY2
RY3
HIGH
LOW
V
Instrument
10
9
8
7
6
5
4
3
2
1
Appx.
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