Chapter 5 Remote Interface Reference

Simplified Programming Overview

Using the range and resolution Parameters

With the MEASure? and CONFigure commands, you can select the measurement function, range, and resolution all in one command. Use the range parameter to specify a fixed range larger than the expected value of the input signal. You can also set the range parameter to AUTO to select autoranging.

For frequency and period measurements, the instrument uses one “range” for all inputs between 3 Hz and 300 kHz. The range parameter is required only to specify the resolution. Therefore, it is not necessary to send a new command for each new frequency to be measured.

Use the resolution parameter to specify the desired resolution for

the measurement. Setting the resolution also sets the integration time for the measurement. The following table shows the relationship between integration time, measurement resolution, number of digits, and number of bits.

 

 

 

 

 

 

 

Integration Time

Resolution

Digits

Bits

 

 

 

 

 

 

 

 

0.02 PLC

< 0.0001 x Range

41⁄2 Digits

15

 

5

0.2 PLC

< 0.00001 x Range

51⁄2 Digits

18

 

1 PLC

< 0.000003 x Range

51⁄2 Digits

20

 

 

 

 

2 PLC

< 0.0000022 x Range

61⁄2 Digits

21

 

 

10 PLC

< 0.000001 x Range

61⁄2

Digits

24

 

 

20 PLC

< 0.0000008 x Range

61⁄2

Digits

25

 

 

100 PLC

< 0.0000003 x Range

61⁄2

Digits

26

 

 

200 PLC

< 0.00000022 x Range

61⁄2

Digits

26

 

 

 

 

 

 

 

 

 

Specify the resolution in the same units as the measurement function, not in number of digits. For example, for dc voltage measurements, specify the desired resolution in volts. For resistance, specify the desired resolution in ohms. For frequency, specify the desired resolution in hertz.

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