User manual

IEEE-488 Reference
2001-900-01 Rev. K / August 2010 4-129
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.
Programming example 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).
4.19.9 :REFerence <n>
[:SENSe[1]]:CURRent:AC:REFerence <n> Specify reference for ACI
[:SENSe[1]]:CURRent[:DC]:REFerence <n> Specify reference for DCI
[:SENSe[1]]:VOLTage:AC:REFerence <n> Specify reference for ACV
[:SENSe[1]]:VOLTage[:DC]:REFerence <n> Specify reference for DCV
[:SENSe[1]]:RESistance:REFerence <n> Specify reference for 2
[:SENSe[1]]:FRESistance:REFerence <n> Specify reference for 4
[:SENSe[1]]:FREQuency:REFerence <n> Specify reference for FREQ
[:SENSe[1]]:TEMPerature:REFerence <n> Specify reference for TEMP
Parameters <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 Reference for 2
= 0 to 2.1e5 Reference for 4
= 0 to 1.5e7 Reference for FREQ
= -328 to +3310Reference for TEMP (°F)
= -200 to +1821Reference for TEMP (°C)
= 73 to 2094 Reference for TEMP (K)
= DEFault 0 (All functions)
= MINimum Minimum value for specified function
= MAXimum Maximum value for specified function
Formats :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>