Keithley 6487 Reference Manual

4-4 Range, Units, Digits, Rate, and Filters Model 6487 Reference Manual
Digits
The DIGITS key sets display resolution for the Model 6487. Display resolution can be set
from 3 to 6 digits. This single global setting affects display resolution for all measure-
ment ranges.
To set display resolution, press (and release) the DIGITS key until the desired number of
digits is displayed.
klqb Changing the integration rate does not change display resolution. Also changing
display resolution does not change the rate setting.
The voltage source value will not be displayed with the 6 digit setting.
SCPI programming — range and digits
Table 4-2
SCPI commands — digits
Commands Description Default
[:CURRent]
:RANGe
[:UPPer] <n>
: AUTO <b>
:ULIMit <n>
:LLIMit <n>
For Digits:
DISPlay
:DIGits <n>
Measure current:
Range selection:
Specify expected reading; -0.021 to 0.021 (A).
See Table 4-3.
Enable or disable autorange.
Specify upper range limit for autorange:
-0.021 to 0.021 (A).
Specify lower range limit for autorange:
-0.021 to 0.021 (A).
DISPlay Subsystem:
Set display resolution: 4 to 7, where <n> of:
4 = 3 digit resolution
5 = 4 digit resolution
6 = 5 digit resolution
7 = 6 digit resolution
Note: Rational numbers can be used. For
example, to set 5 resolution send a value
of 4.5 (the 6487 rounds it to 5).
200μA
ON
20mA
2nA
6

Keithley 6487 Specifications

General

Brand	Keithley
Model	6487
Category	Measuring Instruments
Language	English