GW Instek GDM-8245 - Page 46

GDM-8245 Service Manual
46
R308 0.1Ω Shunt
Selected
Selected
Selected
Selected
Selected
20A 0.01Ω Shunt
Selected
Table 9 shows which relay is actuated and which shunt resistor is selected for a
given DCA measurement range.
Table 10 ACA Signal Switching
Range
Component
500uA
5mA
50mA
500mA
2A
20A
K301~K305
OFF
OFF
OFF
OFF
OFF
OFF
K307
OFF
ON
OFF
OFF
OFF
OFF
K308
OFF
OFF
ON
OFF
OFF
OFF
K309
OFF
OFF
OFF
ON
OFF
OFF
K310
OFF
OFF
OFF
OFF
ON
OFF
R301 900Ω Shunt
Selected
R302 90Ω Shunt
Selected
Selected
R303 10Ω Shunt
Selected
Selected
Selected
R305 1Ω Shunt
Selected
Selected
Selected
Selected
R308 0.1Ω Shunt
Selected
Selected
Selected
Selected
Selected
20A 0.01Ω Shunt
Selected
Table 10 shows which relay is actuated and which shunt resistor is selected for
a given ACA measurement range.
Table 11 ACA+DCA Signal Switching
Range
Component
500uA
5mA
50mA
500mA
2A
20A
K301~K305
OFF
OFF
OFF
OFF
OFF
OFF
K307
OFF
ON
OFF
OFF
OFF
OFF
K308
OFF
OFF
ON
OFF
OFF
OFF
K309
OFF
OFF
OFF
ON
OFF
OFF
K310
OFF
OFF
OFF
OFF
ON
OFF
R301 900Ω Shunt
Selected
R302 90Ω Shunt
Selected
Selected
R303 10Ω Shunt
Selected
Selected
Selected
R305 1Ω Shunt
Selected
Selected
Selected
Selected
R308 0.1Ω Shunt
Selected
Selected
Selected
Selected
Selected
20A 0.01Ω Shunt
Selected
Table 11 shows which relay is actuated and which shunt resistor is selected for
a given ACA+DCA measurement range.