Reference <N - Keithley 2001 Operator's Manual

Programming example
4.19.9 :REFerence <n>
Parameters
Formats
2001-900-01 Rev. K / August 2010
The lower range limit is selected by specifying the lowest expected reading that you expect to measure.
For example, if the lowest expected reading is approximately 10mA, let the parameter (<n>) = 0.01 (or
10e-3). The lowest range that can measure 10mA is the 20mA range. Thus, the 20mA range will be se-
lected as the lower range limit. With this lower limit, the instrument cannot downrange to the 2mA and
200µA measurement ranges.
10 OUTPUT 716; ":curr:ac:rang:auto:ulim 100e-3"
20 OUTPUT 716; ":curr:ac:rang:auto:llim 1e-3; ulim?; llim?"
30 ENTER 716; A$
40 PRINT A$
50 END
Line 10 Selects the 200mA AC range as the upper range limit.
Line 20 Selects the 2mA AC range as the lower range limit, and then queries the range limits.
Line 30 Addresses the Model 2001 to talk.
Line 40 Displays the upper and lower range limits (.2, .002).
[:SENSe[1]]:CURRent:AC:REFerence <n>
[:SENSe[1]]:CURRent[:DC]:REFerence <n> Specify reference for DCI
[:SENSe[1]]:VOLTage:AC:REFerence <n>
[:SENSe[1]]:VOLTage[:DC]:REFerence <n> Specify reference for DCV
[:SENSe[1]]:RESistance:REFerence <n>
[:SENSe[1]]:FRESistance:REFerence <n>
[:SENSe[1]]:FREQuency:REFerence <n>
[:SENSe[1]]:TEMPerature:REFerence <n>
<n> = -2.1 to +2.1 Reference for ACI and DCI
= -1100 to +1100Reference for ACV
= -1100 to +1100Reference for DCV
= 0 to 1.05e9
= 0 to 2.1e5
= 0 to 1.5e7
= -328 to +3310Reference for TEMP (°F)
= -200 to +1821Reference for TEMP (°C)
= 73 to 2094
= DEFault
= MINimum
= MAXimum Maximum value for specified function
:curr:ac:ref <n>
:curr[:dc]:ref <n>
:volt:ac:ref <n>
:volt[:dc]:ref <n>
:res:ref <n>
:fres:ref <n>
:freq:ref <n>
:temp:ref <n>
Specify reference for ACI
Specify reference for ACV
Specify reference for 2
Specify reference for 4
Specify reference for FREQ
Specify reference for TEMP
Reference for 2
Reference for 4
Reference for FREQ
Reference for TEMP (K)
0 (All functions)
Minimum value for specified function
IEEE-488 Reference
4-129