Keithley 6220 DC, User Manual

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Model 6220/6221 User’s Manual Delta, Pulse Delta, and Differential Conductance 5-43
Return to Section 5 topics
1. Use the :NVPR? command to determine if a suitable Model 2182/2182A with
the correct firmware revision is properly connected to the RS-232 port. This
query command can be used for the system configuration shown in
Figure 5-2 B on page 5-5 .
The RS-232 cannot be the selected interface for the Model 6221. If it is, this
query will generate error -221 Settings Conflict.
2. See “ Configuration settings ” on page 5-37 for more information on these set-
tings (:STARt, :STEP, :STOP, :DELTa, :DELay, and :CABort).
3. After setting up Differential Conductance using the above setup commands,
the :ARM command arms Differential Conductance. During the arming pro-
cess, the Model 622x communicates with the Model 2182/2182A.
When armed, Differential Conductance will start when the Model 6221 is trig-
gered. Differential Conductance can be “un-armed” by sending the following
command: SOURce:SWEep:ABORt.
Table 5-4
Differential Conductance commands
Command Description Default
SOURce[1]:DCONductance:NVPResent?
Queries if 2182/2182A is con-
nected.
1
1 = yes, 0 = no
SOURce[1]:DCONductance:STARt <NRf>
Sets start value (amps).
2
<NRf> = -105e-3 to 105e-3
-10e-6
SOURce[1]:DCONductance:STEP <NRf>
Sets step size (amps).
2
<NRf> = 0 to 105e-3
1e-6
SOURce[1]:DCONductance:STOP <NRf>
Sets stop value (amps).
2
<NRf> = -105e-3 to 105e-3
10e-6
SOURce[1]:DCONductance:DELTa <NRf>
Sets delta value (amps).
2
<NRf> = 0 to 105e-3
1e-6
SOURce[1]:DCONductance:DELay <NRf>
Sets delay (seconds).
2
<NRf> = 1e-3 to 9999.999
0.002
SOURCE[1]:DCONductance:CABort <b>
Enable or disable Compliance
Abort.
2
<b> = 0 or OFF, 1 or ON
0
SOURce[1]:DCONductance:ARM
Arms Differential Conductance.
3
SOURce[1]:DCONductance:ARM?
Queries Diff Cond arm.
3
1 = armed, 0 = not armed.
SOURce[1]:DCONductance:NVZero?
Queries V-zero value acquired from
2182/2182A.
4