Keithley 6512 Instruction Manual page 122

Table 7-8
Power supply checks
Step Item/component
1 S102 Line Switch
2 F101 Line Fuse
3 Line power
4 +5V Digital Supply
5 ±210V Supplies
6 +5V Analog Supply
7 -9.1V Supply
8 ±5V Bootstrap Supplies
9 ±24 Supplies
Table 7-9
Relay configuration
Function Range K309
Volts 200mV
2V
20V
200V
Ohms 2kΩ X
20kΩ X
200kΩ X
2MΩ X
20MΩ
200MΩ
2GΩ
20GΩ
200GΩ
Amps 2pA
20pA
200pA
2nA
20nA
200nA
2µA X
20µA X
200µA X
2mA
20mA
Coulombs 200pC X
2nC X
20nC X
External 200mV
Feedback 2V
20V
Zero *
Check
Required condition
Set to 115 or 230 as required.
Check for continuity.
Plugged into live receptacle; power on.
5V, ±5%
+240V, -240V, ±15%
+5V, ±5%
-9.1V, ±5%
+5V, -5V, ±5%
+27.5V, -27.5V, ±15%
K310 K308 K311
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
* * *
Relay
K312 K307 K303 K304
X
X
X X
X X
X X
X X
X X
X X
X X
X X
X X
X
X
X
X
X
X
X
X
X
X
X
* X *
Maintenance
Remarks
Line voltage selection.
Remove fuse to check.
Referenced to digital common.
Referenced to analog common.
Referenced to analog common.
Referenced to analog common.
Referenced to bootstrap common.
Referenced to preamp out.
K305 K306 K301
X
X
X
X
X X
X X
X X
X
X X
X X
X
X
X
*
K302
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
*
7-13