GW Instek GDM-8245 - Page 45

Trouble Shooting
45
Table 7 2-Wire Ω Signal Switching
Range
Component
500Ω
5kΩ
50kΩ
500kΩ
5MΩ
20MΩ
K301
OFF
OFF
OFF
OFF
OFF
OFF
K302
ON
ON
ON
ON
ON
ON
K303
ON
ON
ON
OFF
OFF
OFF
K304
ON
ON
ON
ON
OFF
OFF
K305~K310
OFF
OFF
OFF
OFF
OFF
OFF
RN301 P2 10MΩ
USED
USED
RN301 P3 1.11MΩ
RN301 P4 101KΩ
USED
RN301 P5 10KΩ
USED
RN301 P6 1KΩ
USED
USED
R324 1MΩ
USED
Table 7 shows which relay is actuated and which scale resistor is selected for a
given 2-wire Ω measurement range.
Table 8 Capacitor Measurement Signal Switching
Range
Component
5.000nF
50.00nF
500.0nF
5.000uF
50.00uF
K301
OFF
OFF
OFF
OFF
OFF
K302
ON
ON
ON
ON
ON
K303
ON
ON
ON
ON
ON
K304
ON
ON
ON
ON
ON
K305~K310
OFF
OFF
OFF
OFF
OFF
Table 8 shows which relays are actuated for a given capacitor measurement
range.
Table 9 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