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6-4 Range, Units, Digits, Rate, and Filters

Units

Readings can be displayed using engineering (ENG) units (i.e. 1.236 MΩ) or scientiﬁc (SCI)

notation (i.e. 1.236E+06Ω). Perform the following steps to change the units setting:

1. Press SHIFT and then DIGIT to display the present units setting (ENG or SCI).

2. Press the RANGE

 or  key to display the desired units setting.

3. Press ENTER.

NOTE 1. The units setting can only be changed from the front panel (no remote operation).

2. Scientiﬁc notation provides more resolution on small values than engineering

units.

Digits

The DIGIT key sets display resolution for Model 6514. Display resolution can be set from

3½ to 6½ digits. This single global setting affects display resolution for all measurement

functions.

To set display resolution, press (and release) the DIGIT key until the desired number of digits

is displayed.

NOTE Changing the integration rate changes display resolution, but changing display reso-

lution does not change the rate setting (see RATE for details).

SCPI programming - range and digits

Table 6-2

SCPI commands — range and digits

Commands Description Default

For Range:

[:SENSe] SENSe Subsystem:

:VOLTage Measure voltage:

:RANGe Range selection:

[:UPPer] <n> Specify expected reading; -210 to 210 (V). 20V

: AUTO <b> Enable or disable autorange. (see Note)

:ULIMit <n> Specify upper range limit for autorange; -210 to 210 (V). 200V

:LLIMit <n> Specify lower range limit for autorange; -210 to 210 (V). 2V

Keithley 6514 User Manual

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