GW Instek GDM-8245 - Page 44

GDM-8245 Service Manual
44
Table 5 ACV Signal Switching
Range
Component
500.00mV
5.0000V
50.000V
500.00V
1000.0V
K301
ON
ON
ON
ON
ON
K302
ON
OFF
OFF
OFF
OFF
K303
OFF
OFF
OFF
OFF
OFF
K304
OFF
OFF
OFF
OFF
OFF
K305
ON
OFF
OFF
OFF
OFF
K307~K310
OFF
OFF
OFF
OFF
OFF
RN301 P3 1.11MΩ
SELECTED
RN301 P4 101KΩ
SELECTED
RN301 P5 10KΩ
SELECTED
RN301 P6 1KΩ
SELECTED
R314 130KΩ
SELECTED
Table 5 shows which relay is actuated and which voltage-dividing resistor is
selected for a given ACV measurement range.
Table 6 ACV+DCV Signal Switching
Range
Component
500.00mV
5.0000V
50.000V
500.00V
1000.0V
K301
OFF
OFF
OFF
OFF
OFF
K302
ON
OFF
OFF
OFF
OFF
K303
OFF
OFF
OFF
OFF
OFF
K304
OFF
OFF
OFF
OFF
OFF
K305
ON
OFF
OFF
OFF
OFF
K307~K310
OFF
OFF
OFF
OFF
OFF
Table 6 shows which relays are actuated for a given ACV+DCV measurement
range.