Rigol DM3058 Specifikace stáhnout pdf (Strana 242)

RIGOL

Programming Guide for DM3058

7-4

Example 2: Elimination of Test Impedance Error

Purpose: To eliminate impedance error of test down-lead.

In measuring the smaller resistance, the impedance of test down-lead leads to error.

So uses should eliminate the impedance error of test down-lead before measuring.

The programming steps——RIGOL Commands:

0 *RST /*Reset the instrument for preparing measurement*/

1 cmdset□rigol /*Select RIGOL commands*/

2 *IDN? /*Query equipment ID to confirm if the instrument

works normally*/

3 /*Return: RIGOL Technoligies, DM3058, DM3A020080808, 99.00.00.00.00.00*/

4 :function:resistance /*Enable resistance measuring function*/

5 :measure:resistance□MIN /*Set the measuring range of 2-wire resistance to

200 Ω*/

6 /*Short-circuit the red and black test lead which are used for resistance

measurement*/

7 :calculate:function□AVERAGE /*Enable average calculation function*/

8 :calculate:statistic:average? /*Query the average resistance*/

9 /*Note the returned value: 3.302198e-01 */

10 :calculate:function□REL /*Set relative operation function*/

11 :calculate:REL:state□ON /*Enable relative operation function*/

12 :calculate:REL:offset? /*Query current relative offset which is used to

check the instrument*/

13 /*zero should be returned*/

14 :calculate:REL:offset□0.330219 /*Set the measured offset as the relative

offset*/

15 :calculate:REL:state□ON /*Use the new offset to perform the relative

operation*/

16 :calculate:function□AVERAGE /*Enable average calculation function*/

17 :calculate:statistic:average? /*Query the average resistance*/

18 /*The new measured value: 3.173456e-04*/

Remarks:

1. Execute the operations described in line 6 before sending command line 7.

2. The result shown in line 18 indicates that after the relative operation, the

measured resistance value reduced 3 magnitudes (from -01 to -04).

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Rigol DM3058 Specifikace Strana 242