VXI SVM2608 user manual Example, Preset Setting Measurement Commands

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Bit 14 - Measures 128 Ω on the 10 kΩ scale

Bit 15 - Measures 81.92 kΩ on the 100 kΩ scale

Bit 16 - Measures 81.92 kΩ on the 1 MΩ scale

Bits 17 – 31 are not used and read as “0”.

For Channels 4-5:

Bit 0 - Measures +0.117 V on the 0.5 V scale

Bit 1 - Measures -0.117 V on the 0.5 V scale

Bit 2 - Measures +0.945 V on the 1 V scale

Bit 3 - Measures -0.945 V on the 1 V scale

Bit 4 - Measures +0.945 V on the 2 V scale

Bit 5 - Measures -0.945 V on the 2 V scale

Bit 6 - Measures +0.945 V on the 5 V scale

Bit 7 - Measures -0.945 V on the 5 V scale

Bit 8 - Measures +9.45 V on the 10 V scale

Bit 9 - Measures -9.45 V on the 10 V scale

Bit 10 - Measures +9.45 V on the 20 V scale

Bit 11 - Measures -9.45 V on the 20 V scale

Bit 12 – 31 are not used and read as “0”.

Example 1

Reading 0x0000000C after a Self Test command indicated a problem during Self Test 0 and Self Test 1, measuring ±0.945 V on the 2 V scale, but no problem on all other tests. This would indicate that the front end programmable gain amplifier has a problem on the x5 (gain = 5) setting.

Example 2

Reading 0x00000000 after a Self Test operation would indicate that all Self Tests passed successfully.

Preset Setting Measurement Commands

The following measurement commands are executed by the microprocessor using pre-set, factory- programmed settings:

0x0005 = 100 Ω Range Query (2-wire) 0x0006 = 1 kΩ Range Query (2-wire) 0x0007 = 10 kΩ Range Query (2-wire) 0x0008 = 100 kΩ Range Query (2-wire) 0x0009 = 1 MΩ Range Query (2-wire)

0x000A = Auto-range Query (2-wire) 0x000B = 100 Ω range query (4-wire) 0x000C = 1 kΩ range query (4-wire)

0x000D = 10 kΩ range query (4-wire) 0x000E = 100 kΩ range query (4-wire) 0x000F = 1 MΩ range query (4-wire)

0x0010 = Auto-range query (4-wire)

0x0012 = 1 V Measurement

0x0013 = 2 V Measurement

0x0014 = 5 V Measurement

0x0015 = 10 V Measurement

44 SVM2608 Programming